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Tadao TSUKADA
1985 Volume 51 Issue 467 Pages
1449-1453
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Kazuto SETO, Yoshiaki IWATA
1985 Volume 51 Issue 467 Pages
1454-1462
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Yasusuke JINNOUCHI, Yoshiaki ARAKI, Junkichi INOUE, Kunitsugu NAKASHIM ...
1985 Volume 51 Issue 467 Pages
1463-1471
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Kenichiro OMATA, Hirokazu SHIMODA
1985 Volume 51 Issue 467 Pages
1472-1481
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Hiroshi OTA, Masayoshi KATO, Masahiko MIZUNO
1985 Volume 51 Issue 467 Pages
1482-1489
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Taro SHIMOGO
1985 Volume 51 Issue 467 Pages
1490-1496
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Yoshifumi SUNAHARA, Yoji MORITA, Hiroyoshi ODA
1985 Volume 51 Issue 467 Pages
1497-1505
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Yoshihiko SUGIYAMA, Yoshihiro KUMAGAI, Takeyasu KISHI, Haruo KAWAGOE
1985 Volume 51 Issue 467 Pages
1506-1514
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Teruo IGARASHI, Kazuto TOKURA
1985 Volume 51 Issue 467 Pages
1515-1522
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Kiyohiko UMEZAWA, Takumi AJIMA, Haruo HOUJOH
1985 Volume 51 Issue 467 Pages
1523-1531
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Akira YOSHIDA, Komei FUJITA, Shie-ji WANG, Tadahisa AKASAWA, Sakae KAT ...
1985 Volume 51 Issue 467 Pages
1532-1540
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Ichiro MORIWAKI, Takashi Okamoto, Aizo KUBO
1985 Volume 51 Issue 467 Pages
1541-1549
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Ichiro MORIWAKI, Takashi OKAMOTO, Aizo KUBO, Haruyuki SHISHIYAMA, Nori ...
1985 Volume 51 Issue 467 Pages
1550-1558
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Aizoh KUBO, Taku UENO, JingIi JIN, Yasutsune ARIURA, Tsutomu NAKANISHI
1985 Volume 51 Issue 467 Pages
1559-1567
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Yasutsune ARIURA, Tsutomu NAKANISHI, Aizoh KUBO, JingIi JIN, Taku UENO
1985 Volume 51 Issue 467 Pages
1568-1576
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Katuhiro NAKAJIMA, Kazuki TAKAHASHI
1985 Volume 51 Issue 467 Pages
1577-1587
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Mototaro SATO, Takao YAMAZAKI, Nozomu MASUI, Hiroshi AKAI, Yoshio KATO
1985 Volume 51 Issue 467 Pages
1588-1595
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Susumu TOMITA, Hidemi SHIGEMATSU
1985 Volume 51 Issue 467 Pages
1596-1602
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Yukitaka MURAKAMI, Motohiro KANETA, Hirohiko YATSUZUKA
1985 Volume 51 Issue 467 Pages
1603-1611
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Shigeru KAWAMURA
1985 Volume 51 Issue 467 Pages
1612-1620
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Hideo ISEKI, Tadao MUROTA
1985 Volume 51 Issue 467 Pages
1621-1628
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Masaomi TSUTSUMI, Kimikazu NAKAI, Yoshiro ANNO
1985 Volume 51 Issue 467 Pages
1629-1637
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Kazuaki IWATA, Fuminori OBA, Nobuhiro SUGIMURA
1985 Volume 51 Issue 467 Pages
1638-1646
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Isao KOBAYASHI, Ichiro INASAKI, Tojiro AOYAMA, Goji IBA
1985 Volume 51 Issue 467 Pages
1647-1654
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Hidemi HOSOKAI, Toshio FUKUDA
1985 Volume 51 Issue 467 Pages
1655-1662
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Koichi ITO, Shinsuke AKAGI, Hiroshi BANDO
1985 Volume 51 Issue 467 Pages
1663-1670
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Hiroyuki NAGASAWA, Noriyuki NISHIYAMA, Katsundo HITOMI
1985 Volume 51 Issue 467 Pages
1671-1678
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Takeo SHINMURA, Toshio AIZAWA
1985 Volume 51 Issue 467 Pages
1679-1683
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Kosuke NAGAO, Jun TAKEUCHI
1985 Volume 51 Issue 467 Pages
1684-1689
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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This paper presents a method for solving vibration problems of a plate with irregular shape lying on an elastic foundation in consideration of effects of masses of foundation. For the foundation, the equation of motion of longitudinal vibrations of a solid is utilized, and the solutions of both the foundation and the plate are joined together by use of the conditions of continuity between the plate and the foundation. The analysis uses the Fourier expansion collocation method given by Nagaya to satisfy the irregular boundary conditions. Numerical calculations have been carried out for general polygonal plates on elastic foundations. The results for the plate on Winkler's foundation are also given to compare both results. It is clarified that there are some discrepancies between the present result which includes foundation inertias and that of Winkler's foundation.
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KAZUHIDE OHTA, KOJI KAGAWA, IWAO HONDA
1985 Volume 51 Issue 467 Pages
1690-1696
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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This paper presents the numerical procedure for solving the fluid-structure interactive vibration of a three dimensional structure with complicated configuration such as ship structures, offshore structures and so on. This numerical analysis procedure consists of the following three steps. (a) Experiment or finite element numerical code enables us to obtain the preliminary dynamic characteristics of the structure without fluid inertia effect or with lumped added mass approximating the fluid inertia effect. (b) Boundary element method determines the added mass matrix of fluid surrounding the structure whose surface has three dimensional and complicated configuration. (c) Model analysis technique combines the added mass matrix of fluid with the preliminary dynamic characteristics of the structure and leads to obtain the final results of fluid-structure interactive vibration. In the case of using the preliminary result with approximated lumped mass, lumped mass is to be subtracted from the added mass matrix of fluid.
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KAZUHIDE OHTA, KOJI KAGAWA, IWAO HONDA
1985 Volume 51 Issue 467 Pages
1697-1703
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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The numerical analysis procedure considering the fluid inertia effect was developed ion the previous report for solving the fluid-structure interactive vibration of a three dimensional structure with complicated configuration such as ship structure, offshore structure and so on. This numerical approach was applied to the following dynamic problems with obtaining the good agreement with the theoretical or experimental results, leading to confirm the effectiveness and availability of this method. (a) Dynamic pressure and added mass of the double spheres containing fluid. (b) Dynamic characteristics of the uniform beam with finite length in water. (c) Vibration problems of actual ship structure.
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Toshihiro IRIE, Gen YAMADA, Yasushi MURAMOTO
1985 Volume 51 Issue 467 Pages
1704-1709
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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An analysis is presented for the free vibration of an oblique circular cylindrical shell. For this purpose, the shell is transformed into a circular cylindrical shell of the unit axial length by a transformation of variables. The deflection displacements of the transformed shell are expressed in a series of the products of the eigenfunctions of an axial beam and the trigonometric functions of angular coordinate. The maximum kinetic and strain energies of the shell based upon the Love theory are evaluated analytically, and the frequency equation is derived by the Ritz method. This method is applied to a free-clamped oblique shell truncated at the free edge, and the natural frequencies (the eigenvalues of vibration) and the mode shapes are calculated numerically up to higher modes.
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Masaaki OOKUMA, Akio NAGAMATSU
1985 Volume 51 Issue 467 Pages
1710-1718
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Three kinds of component mode synthesis methods are compared with one another in this paper. The first method is "CMS" proposed by the authors. The second is a method with the residual compliance matrix. The third is one without the residual compliance matrix. Comparing the accuracies and the calculational speeds of these methods with one another, their characteristics are observed. Addition to that, as an example of the application to real mechanical structures, a crank-shaft is analyzed by CMS and the method with the residual compliance matrix.
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Shinya SEKIMOTO
1985 Volume 51 Issue 467 Pages
1719-1724
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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As a testing method for large structures, such as aerospace structures, substructure testing was considered. The main subject of this investigation is modal truncation. As the characteristics of substructures are represented by the lower vibration modes, an error due to truncated higher modes is inherent. In order to evaluate the truncation error, numerical analyses were performed on the flexural vibration of simple beams. Modal parameters of the beam were calculated based on the beam theory. Then two or three beams were coupled analytically using these parameters. The relations between the frequency error and the number of component modes were examined under various conditions. The results of the analyses indicate that the process of modal truncation depends highly on the types of system mode shapes. When substructures are tested on free end boundary conditions, a great number of component modes are required, and testing must cover very high frequencies.
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Yutaka KURITA, Hiroshi IWAMOTO
1985 Volume 51 Issue 467 Pages
1725-1730
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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In this paper, to elucidate a mechanism of the squeal in electromagnetic friction clutch and brake, the instabilities of a two-disks system modeled after actual clutch and brake are investigated experimentally and theoretically. When the squeal occurs, the self-excited vibration is generated forward or backward in the rotational direction. Two disks vibrate in a mode of the high order when the difference of the thickness is small. They vibrate in a mode of the low order when it is large. To investigate the phenomenon of the squeal theoretically, simultaneous ordinary differential equations of the second order are derived from the Equations of Motion for two disks on which the frictional force acts. A real part of a root of the characteristic equation for the differential equations represents the squeal propensity, while an imaginary part of it represents the squeal frequency.
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Akira SONE, Kohei SUZUKI
1985 Volume 51 Issue 467 Pages
1731-1737
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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This report deals with fundamental study concerning various kinds of dynamic load combination problems. Up to the present, the square root of sum of squares (SRSS) law has been widely utilized for various load combination problems. However, considerable error is produced during the combination based upon SRSS law, particularly when correlation among loads to be combined becomes significant. In this study a load combination technique introducing an evaluation of the correlation is proposed. It is applied to the seismic response analysis problem for large-scale liquid storage tank inducing sloshing effect in order to evaluate the base shear coefficient and the overturning moment. It has been made clear that the proposed method is reasonable by comparing with the SRSS-based law and the absolute value summation. And, this merit becomes dominant when combination is carried out not based upon ordinary absolute acceleration response spectrum but relative acceleration response spectrum as input load.
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Hideyuki TAMURA, Takahiro KONDOU, Atsuo SUEOKA
1985 Volume 51 Issue 467 Pages
1738-1747
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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In the previous paper, an algorithm was presented to obtain the periodic solutions and stability of nonlinear multi-degree-of-freedom systems with high speed and high accuracy, based on the harmonic balance method and the infinitesimal stability criterion. A revised algorithm is presented to give only odd order solutions which are composed of odd order harmonics only, and so reduces the dimensions of the amplitude vector and Jacobian matrix to about one-half of the previous one. The Duffing system with hard spring is analysed by this algorithm and the detailed frequency responses are computed for odd order superharmonic resonances (order 3, 5, 7, 9), which are the odd order solutions. The results are shown for each resonance region in terms of (a) maximum amplitudes and norms, (b) superharmonic amplitudes, (c) fundamental amplitudes, and (d) fundamental and superharmonic phase angles. Some of these are comfirmed by numerical simulation.
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Sumio YANO, Tadashi KOTERA, Tsutomu HIRAMATSU
1985 Volume 51 Issue 467 Pages
1748-1754
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Behaviors of a self-exciting system subjected to a parametric excitation are investigated. In the present paper the parametric excitation is expressed by the product of a nonlinear function of deflection with an asymmetric characteristic and of a periodic function of time. A resonance of order 1/2 and the solution in the neighborhood of the resonance are obtained by the averaging method. Since a squared nonlinearity merely makes the resonance have a constant component, it is found that a cubic nonlinearity plays more important parts in the occurrence of the resonance.
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Akio Shiraishi, Izumo Yamakawa
1985 Volume 51 Issue 467 Pages
1755-1759
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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The effect of Coulomb friction combined with viscous damping in a dynamic vibration absorber attached to the primary system with viscous damping subjected to the exciting force P
0 sin ωt has already been clarified. This study is devoted itself to the same system as the above in another case, in which the primary system is subjected to the harmonic base excitation, u
0 sin ωt. The analysis may be proceeded by replacing the amplitude of exciting force P
0 in the previous report by a new apparent force, u
0√(k
21+(c
1ω)
2). The results of the numerical analysis are compared with those of the digital simulation (HITAC DDS III) with good coincidence. And, it is conclude that the existence of Coulomb friction in the absorber increases the amplitude of main mass and limits the non-stop motion within the narrow range of frequency. A set of empirical formulae for determining the optimum tuning and damping is constructed for the practical use.
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Yoji OKADA, Bunshu NAGAI, Kenichi MATSUDA
1985 Volume 51 Issue 467 Pages
1760-1764
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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One of the most significant problem of the rotating machinery is its low inherent damping property. several techniques have been applied to increase the rotor damping. However, usual damping technique causes the mutual coupling effect in the disc plane vibration. On the contrary, active electro-magnetic force can easily control the rotor damping without affecting the cross-coupling vibration. The electro-magnets which is intended to control the damping can be designed very small and can be located at the maximum vibration amplitude in the shaft direction. The technique is applied to the vertical 3-D rotor and with good results.
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Kazushi WATANABE, Hisayoshi SATOH
1985 Volume 51 Issue 467 Pages
1765-1771
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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An analysis method for frequency response of multi-degrees of-freedom vibration system is proposed. In spite that practical structural systems have nonlinear element and experimental results of the vibration test for such systems show the evident nonlinear characteristics, the analytical approaches which have been used so far regarded the system as linear system. In this investigation quasi-linear functions are adopted for the nonlinear elements, and the frequency response was obtained for three-degrees-of-freedom system with three hardening stiffness. The result shows good agreement with those by time historical analysis which spends 600 times of the computation time as that of the proposed method.
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Syozo KUBO, Yasusuke JINNOUCHI, Yoshiaki ARAKI, Junkichi INOUE
1985 Volume 51 Issue 467 Pages
1772-1777
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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This paper is concerned with theoretical and experimental investigations on the dynamic behavior and the stability of an automatic balancer using centrifugal pendulums. It is found that the unbalance of the rotor can be completely corrected only if the pivots of the pendulums are on the center of the shaft. A violent self-excited vibration occurs when the speed of the shaft is nearly equal to the sum of the critical speed of the rotor and the natural frequency of the pendulum. To verify the theoretical results experiments are carried out.
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Takeshi KAWASHIMA, Taro SHIMOGO
1985 Volume 51 Issue 467 Pages
1778-1785
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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The dynamical behavior of a long pipe, which is vertically suspended in the sea water by a single-moored-buoy, was analysed, and the dynamical stability of the pipe excited by a random motion of the buoy was examined in a theoretical manner. In this study, an analytical model of the pipe is constructed from several rigid pipe sections, which are serially linked by universal joints. The covariance stability conditions was examined using the perturbation technique on the assumption of small parametric excitation. As a result of this study, the influences of the natural frequencies of the pipe system, the fluid drag coefficient, the flow speed in the pipe, the dynamical properties of universal joints, the steady current of the sea water and the significant wave height upon the covariance stability of lateral displacement of the pipe system were clarified by the simplified analytical model.
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Noritoshi NAKAGAWA, Ryoji KAWAI, Norio NAKAMURA
1985 Volume 51 Issue 467 Pages
1786-1792
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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The problem of the impact noise of machines is investigated experimentally and analytically. A sphere is struck at the center of a circular plate, and the displacement of the plate, the sound pressure radiated from the plate, and the directivity were measured. The impact noise is composed of three stages, that is, the initial stage, which shows sometimes the initial peak, the transient stage, and the free-vibration noise stage. At the early stage of the impact noise, the measured impact noise agreed well with the calculated results. The directivity of the first mode of the impact noise was not observed, but the directivity of the higher mode was observed. From the directivity of the maximum value of the impact noise, it was found that the radiated sound pressure are concentrated within the cone with about 65 degree of the conical half angle, whose apex is located in the center of the plate.
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Nobuo TANAKA, Yoshihiro KIKUSHIMA
1985 Volume 51 Issue 467 Pages
1793-1801
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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For the purpose of developing a vibrationless forging hammer, this paper proposes a new method to realize the vibrationless forging hammer. The principle of the vibrationless mechanism depends upon the active vibration control method in the previous papers. First, this paper presents the principle of the mechanism of the vibrationless forging hammer and discusses the characteristics of the system. Then, analyzing the vibrationless system from a viewpoint of feedforward control method, this paper derives a state equation of the system. Next, with a view to simulating the system designed by dynamic compensation method, an analog computer is used by applying a signal wave of an actual impact force. And then, the control effect to suppress the impulse response of the system is shown. Finally, in order to obtain a perspective to realize the vibrationless forging hammer, an experiment is carried out and the effectiveness of the system is verified.
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Sanae WADA, Yoshiyuki KAWAKAMI
1985 Volume 51 Issue 467 Pages
1802-1809
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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Porous materials are in a wide range of application as bearing metals because of a self-lubricating action. On the other hand, a grease is widely used as lubricant of porous metal bearings because of the simplicity of oiling. Unfortunately, since the governing law for flows of a grease in porous matrices, that is equivalent to Darcy's law for Newtonian fluids, has not been postulated, the hydrodynamic lubrication of porous metal bearings with a grease has never been reported. Applying the modified Darcy's law for a Bingham solid postulated by the author to porous journal bearings lubricated with a grease, this paper analyzes how the yield shear stress of a Bingham solid and the permeability coefficient of porous matrix affect the flows of lubricant within the lubricating film and the porous metal.
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Yoshio TERAUCHI, Hiromasa NADANO, Masaki KOHNO
1985 Volume 51 Issue 467 Pages
1810-1815
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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To examine the scoring resistance of the spur gears with various coatings under dry friction, scoring tests on the gear pairs coated with copper, graphite, zinc, molybdenum disulfide and phosphate were carried out under dry friction using a power-circulating gear machine. Further, variation in the bulk-temperature of the meshing teeth, while the gears were running, was measured by the thermocouples embeded in the side of the tooth. From the experimental results the significant effect of copper and graphite on the scoring resistance under dry friction was recognized. The bulk-temperature of the gears was decreased after the initial stage of scoring for all gear pairs.
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Shuzo ITOH, Yasunori MURAKAMI, Yoshimi ITO
1985 Volume 51 Issue 467 Pages
1816-1822
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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In this study, the interface pressure distribution of the bolt-flange assembly was measured by means of the ultrasonic waves method using the transducer of focus type and a simplified calculation method of the spring constant of the bolt-flange assembly has been suggested on the basis of the measured results. To confirm the validity of the proposed method, a rigidity of the corresponding bolt-flange assembly has been investigated for the same specimens, and it can be observed that the calculation and measured results are in good agreement. In addition to the rigidity test, the effect of the surface roughness has also been investigated in detail, and it can be found that the joint surface with smaller roughness has larger effects on the interface pressure distribution.
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Kazuo KOGA, Hiroaki Isono
1985 Volume 51 Issue 467 Pages
1823-1832
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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In this paper, a method to make the self-loosening-limit diagram is described based on the theory of mechanism of the self-loosening. The method is presented taking account of the characteristics of impulsive friction on the interfaces of fastener estimated from the results of the experiment in which the coefficient of impulsive friction on the test pieces is measured. The diagrams obtained by the method agree with the experimental results. And after the examination and comparison of those diagrams, the following fundamental items are found effective to prevent the loosening: (1) the compressive force on the interfaces still remains, even when the tensile stress waves arised from the external impact come to the interface of fastened pieces. (2) the actual compressive stress on the pressure flank does not exceed the compressive yield point.
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Chuji MIYATA
1985 Volume 51 Issue 467 Pages
1833-1837
Published: July 25, 1985
Released on J-STAGE: February 21, 2008
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The stress distribution in a bolted joint and the pressure distribution on the bearing surface of a nut have been examined by three-dimensional photoelastic experiment. As a result of this experiment : (1) The experiment shows that the stress distribution in a bolted joint has axially unsymmetric, since the screw part has an axi-unsymmetrical shape. (2) The pressure distribution on the bearing surface of a nut has an unsymmetry corresponding to that stated above. (3) It can be seen that the screw part of the bolted joint is acted upon by the bending moment due to the unsymmetric pressure distribution. (4) In the cases of a nut having some part without thread the following fact has been observed. The peripheral portion of the nut can be bear the load pressure which has uniform distribution in all directions of circular angles.
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