巻号一覧
13 巻 (1960)
- 4 号 p. 199-
- 3 号 p. 127-
- 2 号 p. 65-
- 1 号 p. 1-
前身誌
13 巻, 3 号
選択された号の論文の6件中1～6を表示しています
- |<
- <
- 1
- >
- >|
-
附: ロッキングの最大倍率佐藤 泰夫, 山口 林造1960 年 13 巻 3 号 p. 127-140
発行日: 1960/10/20
公開日: 2010/03/11
ジャーナル フリーShear vibration of a continuous circular column, excited by ground motions, is discussed taking into account the coupling effect of the vibrating body and the elastic foundation, the calculation being based on the theory of I. Toriumi.
A few years ago a similar study was made on the vertical, rocking and the horizontal motion of one mass system, but parameters involved cover wider range in the present study.
Maximum values of the response curves of rocking motion are given taking various values of the ratio (density of structure)/(density of foundation).
Empirical formulas are presented which hold among the parameters giving maximum response.抄録全体を表示PDF形式でダウンロード (697K) -
竹内 均, 斎藤 正徳1960 年 13 巻 3 号 p. 141-149
発行日: 1960/10/20
公開日: 2010/03/11
ジャーナル フリーUsing the variational calculus method in a previous paper, we calculate the free periods of torsional oscillations for two earth models. In the model I, the earth is assumed to be composed of homogeneous mantle and core. In the model II, we hane used the mantle strucure infered by Jeffreys and Bullen. In each model, we calculate the periods when the core is fluid or perfectly rigid. In the fluid core model, we have also worked out the periods when the coupling between the mantle and core is perfect or zero. Present study will show that in order to get useful informations on the rigidity of the core or the strength of coupling between the mantle and core by this kind of study, we must make the observations of free periods with the accuracy of several ten seconds.抄録全体を表示PDF形式でダウンロード (702K) -
三東 哲夫1960 年 13 巻 3 号 p. 150-162
発行日: 1960/10/20
公開日: 2010/03/11
ジャーナル フリーDuring the I. G. Y. period, observations of microseisms were made at many stations in Japan. The data obtained at these stations gave the writer important informations about the occurrence of microseismic storms due to the passing of a cyclone or a typhoon around Japan. Microseisms appear to occur at the time when swells due to the meteorological disturbances reach some coast near the station. This conclusion is supported by the comparison of microseismic amplitudes and swells heights at the same station.
The period relation between microseisms and swells was also investigated and Spectrum of swells examined. The results strongly supports the “Standing wave theory” of Higgins.
All of these results lead us to an conclusion that the swells which are due to a single disturbance source in an Ocean turn into microseismic waves at some steep coast of the land at which standing waves can be generated owing to the interferences of the incident and reflected swells.抄録全体を表示PDF形式でダウンロード (1240K) -
佐藤 泰夫1960 年 13 巻 3 号 p. 163-192
発行日: 1960/10/20
公開日: 2010/03/11
ジャーナル フリーThe study and analysis of dispersed surface waves is aimed at a knowledge of (1) the structure of the medium through which the waves are being propagated, and (2) the mechanism of the souce which radiates the disturbance into this medium. A general survey of the different methods of analysis starting from observed data is first presented, with special emphasis on direct methods for obtaining the structure of the medium. These are the use of the WKB-approximation, and a high-speed iterative computation procedure. The use of Fourier analysis is also discussed, and examples shown based on data from natural and from artificial disturbances.
Contents are:
1. General view of the study on dispersive surface waves.
2. Indirect method of determining structure.
3. Direct method for structure determination.
4. Spectral distribution and absorption by Fourier analysis.
5. Phase velocity by Fourier analysis.
6. Computation of motion.
7. Effect of seismographs.抄録全体を表示PDF形式でダウンロード (1937K) -
島津 康男, 坂田 哲之1960 年 13 巻 3 号 p. 193-194
発行日: 1960/10/20
公開日: 2010/03/11
ジャーナル フリーPDF形式でダウンロード (245K) -
山崎 良雄1960 年 13 巻 3 号 p. 194-196
発行日: 1960/10/20
公開日: 2010/03/11
ジャーナル フリーPDF形式でダウンロード (423K)
- |<
- <
- 1
- >
- >|