Transactions of the Japan Society of Mechanical Engineers Series C

Forced Torsional Vibration for a Two Degrees of Freedom System with a Clearance : 1st Report, Experiment and Simulation

Masumi KATAOKA, Shinichi OHNO, Tsuneo SUZUKI

1986 Volume 52 Issue 474 Pages 431-438
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.431

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (986K)
Vibration Analysis of Disk-Spindle under Ball Bearing Excitation in HDA

Osami MAYSUSHITA, Taro SONODA, Hiraku OHTA, Jun NARUSE, Yohichi INOUE, ...

1986 Volume 52 Issue 474 Pages 439-447
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.439

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (1126K)
Vibration Behavior of ATR Reactor Internals Model and Analysis

Tsutomu HIRAMATSU, Yoshiaki KOMURA

1986 Volume 52 Issue 474 Pages 448-455
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.448

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (836K)
A Study on the Dynamic Characteristics of Pump Seal : 5th Report, In case of Multi-stage Parallel Grooved Seal considering Inlet Flow Swirl

Takuzo IWATSUBO, Ryuji IBARAKI, Bo suk YANG, Ryoji KAWAI

1986 Volume 52 Issue 474 Pages 456-464
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.456

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (758K)
Coupled Lateral-Torsional Vibration of Rotor System Trained by Gears : 4th Report, The Analysis of the Vibration of a Geared Rotor System Supported by Oil Film Bearings

Shirou ARII, Takuzo IWATSUBO, Ryoji KAWAI

1986 Volume 52 Issue 474 Pages 465-473
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.465

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (924K)
Experiments on Vibrations of a Hollow Rotor Partially Filled with Liquid

Hiroshi OTA, Yukio ISHIDA, Akihiro SATO, Tomohiro YAMADA

1986 Volume 52 Issue 474 Pages 474-482
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.474

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (994K)
A Vertical Vibration Analysis of Bogie Car Considering Restrictive Force at Car-End : 2nd Report, Effects of Connected Car Position in a Train and Evaluation of Riding Quality

Katsuya TANIFUJI

1986 Volume 52 Issue 474 Pages 483-489
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.483

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (769K)
Deflection analysis of a Foil disk : Analysis and Experiment Concerning a Standing Wave

Hiroshi HOSAKA, Yasuhide NISHIDA

1986 Volume 52 Issue 474 Pages 490-497
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.490

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (877K)
Effects of Torsional Vibrations on a Position Control System Consisting of a Servo-Mortar and a Magnetic Damper

Kosuke NAGAYA, Hiroyuki KOJIMA, Hiroaki IWATA, Mitsuo ITO, Koichi OTA

1986 Volume 52 Issue 474 Pages 498-506
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.498

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (905K)
Precise Control of Robot Hand Trajectory by Real-Time Compensation of Positional and Orientational Errors

Shiyuki SAKAUE, Koichi SUGIMOTO

1986 Volume 52 Issue 474 Pages 507-514
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.507

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (824K)
Position and Vibration Control for Suspended Gondola-Rope Systems : 1st Report, A Method of Position and Vibration Control with Aid of Image Processing by a Vision System

Toshio FUKUDA

1986 Volume 52 Issue 474 Pages 515-521
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.515

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (691K)
Statistical Studies on Temperature Changes of a Refrigerator Disturbed by Opening and Closing Door-Movement

Yoshifumi SUNAHARA, Nagato OHSE, Takao KAWAMURA

1986 Volume 52 Issue 474 Pages 522-528
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.522

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (626K)
Influence of the Fluid Inertia Forces on the Dynamic Characteristics of Externally Pressurized Thrust Bearings : 4th Report, Inertia Effects on the Dynamic Performance of Externally Pressurized Circular Thrust Bearings With Capillary Restrictor

Yoshio HARUYAMA, Tsuneji KAZAMAKI, Atsunobu MORI, Garyo MORI, Tadayosh ...

1986 Volume 52 Issue 474 Pages 529-533
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.529

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (577K)
Dry Sliding Wear Properties of Alumina Fiber Reinforced Aluminum Composites

Hideharu FUKUNAGA, Isao SAKAI

1986 Volume 52 Issue 474 Pages 534-541
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.534

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (1066K)
Influence of Material and Hardness of Gear upon Pitting Endurance Limit

Tokihiko TAKI

1986 Volume 52 Issue 474 Pages 542-548
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.542

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (699K)
Study on Welded Structure Gears : 1th Report, Deformation and Stress on a Uniformly Loaded One Side Builtin Thin Cylindrical Shell

Takehide SAYAMA, Kunikazu HAYASHI, Kiyohiko UMEZAWA

1986 Volume 52 Issue 474 Pages 549-556
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.549

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (796K)
Study on Welded Structure Gears : 11th Report, Optimum Structure for Thin-Rimmed Spur Gear

Takehide SAYAMA, Satoshi ODA, Kiyohiko UMEZAWA

1986 Volume 52 Issue 474 Pages 557-561
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.557

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (552K)
Roll-finishing of Involute Helical Gears in Crossed Axes System : 2nd Report, Computer Simulation

Ichiro MORIWAKI, Takashi OKAMOTO, Aizoh KUBO, Haruyuki SHISHIYAMA

1986 Volume 52 Issue 474 Pages 562-569
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.562

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (847K)
Optimal Design of A Linkage Mechanism Used for Fork Lift : Application of A Nonlinear Optimization Method of Minimax Type

Koichi ITO, Tadashi KUROIWA, Shinsuke AKAGI

1986 Volume 52 Issue 474 Pages 570-576
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.570

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (693K)
Dynamic Interactions of Joint Clearances and Torsional Elasticity of Driving Shaft in Link Mechanism

Takeshi FURUHASHI, Nobuyoshi MORITA

1986 Volume 52 Issue 474 Pages 577-583
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.577

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (784K)
Super High Speed Flywheel

Kenji MIYATA, Iwao HARADA

1986 Volume 52 Issue 474 Pages 584-589
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.584

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (720K)
Dynamic Deflection of Magnetic Tape Due to Rotating Head Scanning

Yasuhide NISHIDA, Hiroshi HOSAKA

1986 Volume 52 Issue 474 Pages 590-598
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.590

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (914K)
Automated Computer Simulation of Various Physican Phenomena for the Application to Automated Machine Design : 2nd Report, Elastostatic Analyses of Three-Dimensional Structures Composed of Curved Plates

Masaaki YOKOYAMA, Ikuo NAMATAME

1986 Volume 52 Issue 474 Pages 599-606
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.599

JOURNAL FREE ACCESS

Show abstractHide abstract

[in Japanese]

View full abstract

Download PDF (985K)
Development of Pipe Layout System

Yoshimi OTA, Shigeru YAMAMOTO, Shinji TOKUMASU, Yukio YAMAGUCHI, Hirom ...

1986 Volume 52 Issue 474 Pages 607-615
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.607

JOURNAL FREE ACCESS

Download PDF (1090K)
Non-Stationary Response Analysis of Non-Symmetric Non-Linear Single-Degree-of-Freedom Systems Subjected to Random Excitation

Kazuo YOSHIDA

1986 Volume 52 Issue 474 Pages 616-623
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.616

JOURNAL FREE ACCESS

Show abstractHide abstract

For the analysis of the non-stationary response of non-symmetric non-linear single-degree-of-freedom systems subjected to random excitation, an approximate method is presented. In the method, a partially Gaussian probability density function, taking account of asymmetry of response, is assumed. This method is applied to the analysis of a non-stationary response of a single-degree-of-freedom system with quadratic and cubic non-linear terms subjected to white noise. In the numerical examples, the results obtained by this method are compared with those by the Gaussian moment method, the truncation method of the exact moment equation and the digital simulations. And the usefullness of the method is verified.

View full abstract

Download PDF (852K)
A STUDY OF THE LEVEL CROSSING OF A NONLINEAR SYSTEM SUBJECTED TO NONWHITE RANDOM EXCITATION

Koji KIMURA, Hideyuki MAKITANI, Masaru SAKATA

1986 Volume 52 Issue 474 Pages 624-630
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.624

JOURNAL FREE ACCESS

Show abstractHide abstract

An investigation of the level crossing problem is presented for a nonlinear system subjected to an amplitude modulated nonwhite random excitation that is effective for modeling actual earthquake ground motion. The reliability functions of Duffing and dry friction systems are calculated by the conventional method based upon the Poisson assumption of threshold crossings. The applicability of the method to nonlinear systems, and also the validity of the Poisson assumption, are discussed in comparison with the digital simulation results.

View full abstract

Download PDF (647K)
Estimation of First Passage Probability and Probability Distribution of Level Crossings in Random Vibration

Kazuyuki YAGASAKI, Koji KIMURA, Masaru SAKATA

1986 Volume 52 Issue 474 Pages 631-638
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.631

JOURNAL FREE ACCESS

Show abstractHide abstract

An approximate analytical technique is presented to improve the theory of level crossings in random vibration. The first passage probability and the probability distribution of level crossings are determined in therms of the factorial moments of crossings. This technique is a generalization of the conventional one, based on the assumption of independent crossings, and thus applicable for a wide class of random processes. As a numerical example, the displacement response of a single degree of freedom linear system subjected to an amplitude modulated white noise excitation is considered. Comparison with the corresponding digital simulation results demonstrates the usefulness of the present method.

View full abstract

Download PDF (754K)
Internal Resonance in a Nonlinear Multi-Degree-of-Freedom Vibratory System : When Its Natural Frequencies Satisfy the Condition p₁+p₂=P₃ or 2p₁+p₂=p₃

Kimihiko YASUDA, Toshio YAMAMOTO, Masayoshi KATO

1986 Volume 52 Issue 474 Pages 639-647
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.639

JOURNAL FREE ACCESS

Show abstractHide abstract

The characteristics of oscillations induced in a nonlinear vibratory system whose natural frequencies are not in the ratio of prime integers and yet satisfy the condition of internal resonance, are discussed via a typical example. The example taken up here is a three-degree-of-freedom system whose linearized natural frequencies p_i (i=1, 2, 3, ; p₁<p₂<p₃) satisfy the condition p₁+p₂=p₃ or 2p₁+p₂=p₃, and which is subjected to harmonic excitation. The characteristics of oscillations induced in the system near primary as well as secondary resonance points are examined. For analysis, the harmonic balance method is employed. The analysis reveals that near some of the resonance points, internal resonance occurs accompanying three harmonics of frequencies satisfying a certain relation. Also shown is that an almost periodic motion can occur. The validity of the obtained results is checked by performing direct numerical integration.

View full abstract

Download PDF (937K)
Internal Resonance in a Parametrically Excited Two-Degree-of-Freedom System with Nonlinear Spring Characteristics : 1st Report, On the Subharmonic Type

Yukio ISHIDA, Toshio YAMAMOTO

1986 Volume 52 Issue 474 Pages 648-656
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.648

JOURNAL FREE ACCESS

Show abstractHide abstract

In a parametrically excited with linear spring characteristics (p_i, p_j : natural frequency, Ω : frequency of parametric excitation), unstable vibrations occur when the relations p_i≒Ω/2 and p_i+p_j≒Ω hold. We call the former a subharmonic type and the latter a combination type. In a nonlinear system, the nonlinearity modifies the growth of unstable vibrations and results in the steady oscillation with finite amplitude. In the present paper, we investigate the effects of internal resonance on the parametrically excited oscillation of subharmonic type. We study the unstable region at p_i≒Ω/2 and p₂≒Ω in a two-degree-of-freedom system where p₁ : p₂≒1 : 2 or 1 : 3 holds. It is clarified that the oscillations of these four cases have different characteristics concerning the following points : kinds of influential coefficients of parametric excitation terms and nonlinear terms, shapes of resonance curves, induction of oscillation due to internal resonance, occurrence of almost periodic oscillations, and so on.

View full abstract

Download PDF (941K)
Internal Resonance in a Parametrically Excited Two-Degree-of-Freedom System with Nonlinear Spring Characteristics : 2nd Report, On the Combination Type

Yukio ISHIDA, Toshio YAMAMOTO

1986 Volume 52 Issue 474 Pages 657-663
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.657

JOURNAL FREE ACCESS

Show abstractHide abstract

In a parametrically excited system with linear spring characteristics (p_i, p_j : natural frequency, Ω : frequency of parametric excitation), unstable vibration occur when the relations p_i≒Ω/2 and p_i+p_j≒Ω hold. We call the former a subharmonic type and the latter a combination type. In the previous paper, we reported effects of internal resonance on parametrically excited oscillations of subharmonic type in a nonlinear two-degree-of-freedom system where p_i : p_j=1 : 2 and 1 : 3. In the present paper, we investigate the internal resonance phenomena in parametrically excited oscillations of combination type in the same system. It is clarified that the characteristics of this kind of oscillation change remarkably due to internal resonance. Especially, a different type of almost periodic oscillation which did not occur in the subharmonic type appears.

View full abstract

Download PDF (823K)
Vibrations of a Forced Self-Excited System with a Retarded Argument : 1/2-th Subharmonic Vibrations

Yoshihiro TSUDA, Atsuo SUEOKA, Yutaka YOSHITAKE, Hideyuki TAMURA, Junk ...

1986 Volume 52 Issue 474 Pages 664-671
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.664

JOURNAL FREE ACCESS

Show abstractHide abstract

The 1/2-th subharmonic entrained vibrations of a nonlinear retarded system with a soft spring type are investigated by making use of an averaging method, under the condition that both a periodic exciting force and a constant force are operative. The Routh-Hurwitz criterion provides the stability conditions of these steady oscillations. It is also revealed that almost periodic vibrations occur in the same frequency region as in which the entrained vibrations appear. These two kinds of oscillations are studied numerically using mapping plots in the phase plane. The analytical results relatively agree with the numerically solutions and also the results of an analog computer. In addition, it is shown that the 1/2-th subharmonic oscillations can take place in the same system, even though there is only a periodic force as the stimulating force.

View full abstract

Download PDF (766K)
Periodic Solutions and the Stability in a Non-Linear Parametric Excitation System : 2nd Report, Consideration of Solutions in the Neighborhood of Resonance of Order 1

Sumio YANO, Tadashi KOTERA, Tsutomu HIRAMATSU

1986 Volume 52 Issue 474 Pages 672-677
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.672

JOURNAL FREE ACCESS

Show abstractHide abstract

Behaviors of a parametrically excited system with a self-excitation are investigated by analyzing a differential equation of van der Pol-Mathieu type. Beat phenomena are observed in the neighborhood of parametric resonance of order 1 and their two kinds of approximate solutions are obtained. The comparison between them and a solution by Runge-Kutta-Gill method is performed and it is found that the existence of a solution by two components is limited to a narrow region of frequency. The character on the waveforms and frequency components is considered in detail.

View full abstract

Download PDF (657K)
Application of the Rayleigh-Ritz Method to the Free Vibration Analysis of Plates with Variable Thickness

Tsuneo TSUIJI, Minoru SHUGYO

1986 Volume 52 Issue 474 Pages 678-682
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.678

JOURNAL FREE ACCESS

Show abstractHide abstract

This paper presents an analytical method of free vibrations of plates with variable thicknesses. The method proposed is based on the Rayleigh-Ritz procedure using Lagrange multipliers. The plate is divided into triangular elements having a linear variation thickness in two coordinate directions. The strain and kinetic energies are evaluated by the sum of single integrals along the boundary of the triangular elements. Frequency parameters are calculated for three kinds of plates having variable thicknesses and are compared to values obtained by other investigators. The comparison shows that the method proposed is useful to analyze the free vibration of plates with variable thicknesses.

View full abstract

Download PDF (510K)
Active Control of Structural Vibration by Active Mass Damper : Vibration Control of Multi-Degree-of-Freedom System by Single Control Force

Yoshiro FURUISHI, Kiyoshi TAKETOH

1986 Volume 52 Issue 474 Pages 683-687
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.683

JOURNAL FREE ACCESS

Show abstractHide abstract

Active vibration control for mechanically flexible systems with slight damping is developed. It can be applied to active mass damper systems in tall buildings and active tendon systems in flexible spacecraft. This paper presents a study of active control (damping) of structural vibration using an active mass damper system consisting of a force actuator, a sensor, and a feedback controller. Active damping of a multi-derree-of-freedom system is attempted by employing a single force actuator. The effectiveness of this active mass damper system and the fundamental problems in practical application are shown experimentally by a model of a 4-storied structure.

View full abstract

Download PDF (622K)
Fluidelastic Instability of Rectangular Panels under A Shearing Load in A Subsonic Flow

Junji TANI, Yasuhiro HARA

1986 Volume 52 Issue 474 Pages 688-694
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.688

JOURNAL FREE ACCESS

Show abstractHide abstract

The elastic instability of an orthotropic rectangular panel subjected to a shearing load, supported on an elastic foundation and exposed to a subsonic inviscid flow over its upper surface, is investigated theoretically. On the basis of the small deflection plate theory and the classical linearized potential theory, the problem is solved for both the clamped and simply supported boundary conditions by means of the Galerkin method and Fourier transforms. It is found that the divergence velocity decreases with an increase in the fluid compressibility and the shearing load increases with the values of the orthotropic parameters and the spring stiffness of the elastic foundation. It is confirmed that the divergence velocity of the rectangular panel with a small aspect ratio is equal to that of the infinite panel.

View full abstract

Download PDF (694K)
Analysis of Dynamic Characteristics for Elastic Cylindrical Journal Bearing : 1st Report, Numerical Analysis Method

Kyousuke ONO, Seiichi MICHIMURA, Takashi MORIYASU

1986 Volume 52 Issue 474 Pages 695-703
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.695

JOURNAL FREE ACCESS

Show abstractHide abstract

This paper presents a numerical analysis method for static and dynamic characteristics of cylindrical journal bearings with elastic sleeves. According to the experimental result that pressure deforms a sleeve uniformly in the axial direction, elastic cylindrical bearings are modeled as thin cylinders which are uniformly deformed by the sum of pressure along the axial direction. In order to simplify the numerical analysis of the pressure distribution and deformation of the bearing, the Reynolds equation based on the average flow theory is used. It can easily include the oil film rupture effect. Since the stiffness and damping coefficients of elastic journal bearings are dependent on frequency, the Reynolds equation, equations of elastic deformation for a journal bearing and equations of motion for bearing-rotor systems must be simultaneously solved. In this paper, a new numerical method of solving these nonlinear equations with the help of the Newton-Raphson method and the Booy-Coleman method is developed to decrease computer time.

View full abstract

Download PDF (897K)
Self-Excited Vibration of a Circular Plate Subjected to Frictional Forces Exerted in Two Regions on Its Outer Circumference : A Case of a Circular Plate Subjected to Distributed Frictional Forces without the Effect of Internal Resonances

Atsuo SUEOKA, Yutaka YOSHITAKE, Hideyuki TAMURA, Yoshihisa TAKAYAMA

1986 Volume 52 Issue 474 Pages 704-709
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.704

JOURNAL FREE ACCESS

Show abstractHide abstract

This paper deals with the self-excited vibration of a Mindlin circular plate subjected to distributed frictional forces as a function of relative slip velocity in two regions on its outer circumference. However, the effect of the internal resonances is not considered here. It is derived from the averaging method that there exist two stable steady-state solutions of single mode with different spatial location with respect to two frictional regions. The stable solutions become, in general, unstable as the distributed regions widen, but, on the other hand, the stable self-excited vibrations due to the distributed frictions occur anew. However, within a certain length of the distributed regions, the self-excited vibration characteristic has the same tendency as the one due to the concentrated frictional forces at two points, which was dealt with in the previous paper.

View full abstract

Download PDF (642K)
Lateral Vibration of a Flexible Pipe Conveying Fluid

Masatsugu YOSHIZAWA, Eiichiro MORITANI, Eiji HASEGAWA, Yasushi TSUJIOK ...

1986 Volume 52 Issue 474 Pages 710-717
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.710

JOURNAL FREE ACCESS

Show abstractHide abstract

The self-excited vibration of a flexible cantilevered pipe due to an internal flow is examined both theoretically and experimentally. The pipe is hung vertically below the tank, in which the pressure is constant. Using nonlinear coupled equations with respect to axial fluid velocity and lateral deflection of the pipe, it is shown that the amplitude and the frequency of the pipe in a state of equilibrium are determined as functions of the pressure in the tank, under the supercritical condition in which the lateral vibration of the pipe is excited. Furthermore, the experiment was performed using a pipe model conveying water. The experimental result is shown to be in good qualitative agreement with the theoretical one.

View full abstract

Download PDF (813K)
The Vibration of Rotating Cylindrical Shells

Takashi SAITO, Mitsuru ENDO

1986 Volume 52 Issue 474 Pages 718-723
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.718

JOURNAL FREE ACCESS

Show abstractHide abstract

The vibration of rotating cylindrical shells is examined with relation to a thin roatating ring. The results of the experiment and the theoretical analyses for four kinds of boundary conditions (i. e., (A) both ends clamped ; (B)simply supported without axial constraint ; (C) simply supported with axial constraint ; and (D) a clamped end at one end, a free end at the other end) are presented. Consequently, it is found that the dependence of the frequencies upon the rotating speeds is hardly subjected to boundary conditions, and is represented by the simple relation for a thin rotating ring, provided that the frequencies and rotating speeds are normalized by the natural frequencies of a non-rotating cylindrical shell.

View full abstract

Download PDF (597K)
The Vibration Characteristics of Steam Turbine Blades : 2nd Report, A Method for Calculating Resonant Conditions and Resonant Stresses of Bladed-Disk Vibration

Kiyoshi NAMURA

1986 Volume 52 Issue 474 Pages 724-729
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.724

JOURNAL FREE ACCESS

Show abstractHide abstract

Bladed-disk vibration is investigated for resonant conditions when it is excited by flow non-uniformity around the periphery. Simple and comprehensive results for general resonant conditions are obtained by calculating the work done by the exciting force. Also, a method for calculating the resonant stresses is shown by equating the work done by the exciting force and the energy dissipated by damping. The result of a calculation for resonant stresses of a simple bladed-disk model is shown, and some of their features are discussed.

View full abstract

Download PDF (705K)
Running Vibration of Shinkansen EC on Artificially Set Track Irregularity

Katsuya TANIFUJI, Katsusato MIYOSHI

1986 Volume 52 Issue 474 Pages 730-737
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.730

JOURNAL FREE ACCESS

Show abstractHide abstract

In order to improve the riding quality of Shinkansen, test runs in the speed range of 70∼210 km/h were carried out on Joetsu Shinkansen, April 1982, where many kinds of track irregularity were set artificially. Regression analysis was done to confirm the quantitative relation between car vibrations and running speed in each track irregularity section. As a result, it was made clear that the lateral car-body vibration grew remarkably on lateral alignment irregularity sections of 30∼50 m wave-length in the speed range over 150 km/h. Further, it became possible to estimate amplitudes of each irregularity which harmed the riding quality, and it was confirmed that a suitable change in the damping coefficient of lateral oil damper was effective for reduction of the lateral vibration.

View full abstract

Download PDF (869K)
Dynamic Stability and Curving Performance of Railway Vehicles

Yoshihiro SUDA, Takehiko FUJIOKA, Masakazu IGUCHI

1986 Volume 52 Issue 474 Pages 738-745
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.738

JOURNAL FREE ACCESS

Show abstractHide abstract

This paper presents hunting stability and curving performance of high speed rail vehicles. Considering non-linear creep force and flange contact, the lateral force of front wheel on outer rail was calculated in steady state curve negotiation, and critical speed of wheelset and truck hunting was also calculated. The influence of linkages which were so-called cross-anchor linkage, linkage between wheelset and truck frame, and secondary suspension which were bolster anchors and anti-yaw damper and primary anti-yaw damper were examined. These results were compared with our proposed analytical solutions of optimal design for stability and curving performance, and design of truck suspension was discussed. By studing the difference of analytical truck models, it was proved that it was possible to use half body model for testing on roller rig or truck model. Moreover calculation of hunting stability by using half body model was compared with results of test on roller rig, which was carried out in Railway Technical Research Institute with good agreement.

View full abstract

Download PDF (850K)
Sensitivity of Beam Type Load Cell to Off-center Loading : 3rd Report, Shapes for Reducing Sensitivity

Yukio KOJIMA

1986 Volume 52 Issue 474 Pages 746-749
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.746

JOURNAL FREE ACCESS

Show abstractHide abstract

For a parallel beam load cell, the sensitivity to off-center loading can be reduced by changing the shapes of the beams. Longitudinal load position sensitivity is reduced by thinning the beams at their mid-section, whereby the neutral axis for bending about the transverse axis is changed. The bending and the shearing strains of beams due to transverse load position changes are reduced by making two holes in the beam sections on which a strain gage is mounted, whereby the stiffness of the horizontal bending of the beams increases.

View full abstract

Download PDF (494K)
A Study on a Flexible Mobile Robot with Versatile Shape Control Based on Multiple Link-Wheel Mechanism : 1st Report, Fundamental Mechanism and Motion of Vroid I and Its Joint Load Distribution Control Method with the Redundancy Consideration

Toshio FUKUDA, Hiroshi KOBAYASHI

1986 Volume 52 Issue 474 Pages 750-757
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.750

JOURNAL FREE ACCESS

Show abstractHide abstract

This paper presents a new concept of a flexible mobile and versatile shape reconfigurable control mechanism of a robot, called a versatile robotnoid (Vroid), which can be applied for plant maintenance works and other outdoor operational works, where its working environments are restricted due to mobil space and terrain. The Vroid I based on the multiple link-wheel mechanism has abilities of passing through rough terrains, passing over obstacles and going up and down stairways. Compared the Vroid I with conventional wheel, crawler and legged locomotion types of the mobile mechanisms, the proposed one is considered to be superior to those from the viewpoint of flexibility and adaptability to working environments. Utilizing the redundancy of joints in degrees of freedom, a method of the joint static control sequence is proposed to minimize the torques required to joint rotation under some constraints, which can easily be solved by the linear programming approach.

View full abstract

Download PDF (829K)
The Effects of Fluid Inertia Forces in Squeeze Film Bearings Lubricated with Pseudo-Plastic Fluids : 3rd Report, Theoretical Analysis in the Case of a Small Nonlinear Factor

Hiromu HASHIMOTO, Sanae WADA

1986 Volume 52 Issue 474 Pages 758-763
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.758

JOURNAL FREE ACCESS

Show abstractHide abstract

In this paper, theoretical analysis concerning the effects of fluid inertia forces in parallel circular squeeze film bearings lubricated with pseudo-plastic fluids is presented. Based on a first order perturbation method in a small nonlinear factor, an analytical solution is derived for the calculation of pressure distribution under sinusoidal squeezing motion, and the applicability of the solution is discussed. Results obtained from the analytical solution agree well with the numerical results for a small nonlinear factor.

View full abstract

Download PDF (623K)
Effect of Asperity Interacting Frequency on Rolling Fatigue : 2nd Report, The Cases for a Thermal Refined S45C Carbon Steel, a Hardened SCM435 Alloy Steel and a Case-Hardened SCM415 Alloy steel

Akira NAKAJIMA, Harumi MORODOMI

1986 Volume 52 Issue 474 Pages 764-769
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.764

JOURNAL FREE ACCESS

Show abstractHide abstract

In order to evaluate the severity of asperity interactions in rolling contact, the author introduced a new parameter 'asperity interacting frequency N_af'. N_af is defined by the number of contact positions of higher hardness roller with different microgeometries which are brought into contact with any one position of mating lower hardness roller and the effects on rolling fatigue have been examined using thermal refined or hardened rollers with different hardnesses. As the results, similar to the previous results obtained using normalized steel rollers, it was found that there exists a regular relation between the parameter N_af and the pitting life in pure rolling conditions. Furthermore, it was recognized that the occurrence of micro pitting, which is apt to develop on the surface of a case-hardened steel roller, is decisively affected by the parameter N_af.

View full abstract

Download PDF (849K)
STUDY ON WELDED STRUCTURE GEARS : 12TH REPORT: CALCULATION METHOD OF FILLET STRESS ON THIN RIM GEARS WITH A CENTER WEB

Takehide SAYAMA, Kunikazu HAYASHI, Kiyohiko UMEZAWA

1986 Volume 52 Issue 474 Pages 770-774
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.770

JOURNAL FREE ACCESS

Show abstractHide abstract

On the 9th and 10th report of this study, in order to investigate deformation and stress characteristics of thin rim gear which are needed to determine the rim thickness, we calculated the deformation and stress values when concentrated and uniform distributed load acts upon thin plate shell which is one side free and the other side built-in. In this report, we applied these calculation to actual gears, that is to propose theoretical solution of the worst stress of tooth fillet when uniform distributed load acts upon tip of the involute spur gears which have thin rim and center web. We examined its property by three-dimensional photo-elastic experiments.

View full abstract

Download PDF (606K)
STUDY ON WELDED STRUCTURE GEARS : 13TH REPORT : PROPOSAL OF MAXIMUM FILLET STRESS FORMULA ON THIN RIM GEARS WITH A CENTER WEB

Takehide SAYAMA, Kunikazu HAYASHI, Kiyohiko UMEZAWA

1986 Volume 52 Issue 474 Pages 775-780
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.775

JOURNAL FREE ACCESS

Show abstractHide abstract

On the 12th report, we proposed theoretical solution of the worst stress when uniformly distributed load acts upon thin rim gears which have center web. Furthermore we examined its property by three-dimensional photo-elastic experiment. We also pointed out the importance of finding load distribution of tooth surface. In this report, we calculated this stress distribution on tooth surface and synthesize these results to obtain theoretical solution of the worst stress on the root fillet of spur gears which have thin rim and a center web. We also find out characteristics of distribution of load on tooth surface, amplification of root fillet stress for each combination of b/a, h/b, h/m. We finally estimate the optimum relation of rim/module.

View full abstract

Download PDF (611K)
The Hysteresisloop of Fixing Element : An Analysis by Boundary Element Method

Takeshi KAKUBARI, Masaki KANO, Kazuyuki YAMANAKA

1986 Volume 52 Issue 474 Pages 781-787
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.781

JOURNAL FREE ACCESS

Show abstractHide abstract

There are energylosses when tangential load is applied to fixing element such as a bolt joint. A tangential load-displacement relations makes a hysteresisloop in a fixing element. The hysteresisloop was calculated by boundary element method. In theory three kinds of contact nodes were considered, which are free, stick and slip. From numerical result, stick-slip zone varies with tangential load, and the inclination of hysteresisloop increases and that area decreases as the normal load increases and the tangential load dicreases. Theoretical results are qualitatively in good agreement with experimental result in predicting relation between the inclinations or areas and the amplitude of tangential load.

View full abstract

Download PDF (685K)
Generating Method for Structural Configuration of Machine Tools : Variant Design Using Directed Graph

Hidenori SHINNO, Yoshimi ITO

1986 Volume 52 Issue 474 Pages 788-793
Published: February 25, 1986
Released on J-STAGE: February 21, 2008

DOIhttps://doi.org/10.1299/kikaic.52.788

JOURNAL FREE ACCESS

Show abstractHide abstract

The modular construction system for producing machine tools has recently become important, not only to help rationalize their design and manufacturing procedures, but also to help evolve a flexible manufacturing system. In this paper, therefore, to establish a design methodology for the modular construction system of machine tools, a generating method for structural configuration, i. e., a procedure of computer aided concept design has been proposed, simultaneously clarifying its characteristic and beneficial features. The proposed method is of the variant design type, in which a machine tool as a whole and modular complex is represented with the directed graph in the field of graph theory. When generating a structural configuration, at first, possible modular complexes in the data memory are referred to, and then through simple mathematical treatment they are integrated so as to form structural configurations. By this method, all possible structural configurations of the machine tool can be generated systematically and rationally, according to the machining requirement.

View full abstract

Download PDF (635K)

Register with J-STAGE for free!