著者

中嶋 大智 相田 健一郎 秋山 裕喜 瀧上 唯夫 富岡 隆弘 西山 幸夫 田中 隆之 宮本 岳史 今岡 憲彦

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.854, pp.17-00078, 2017 (Released:2017-10-25)

参考文献数

21

被引用文献数

3

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It is pointed out that the yaw dampers, which are often installed in between carbody and bogie frame of a high-speed railway vehicle, have such unfavorable points that the damping force is generated not only in the yawing direction but also in other direction. As a result the damping force is generated also to the longitudinal or pitching vibration of a bogie, and the excitation force acts in the longitudinal direction of the carbody resulting in the increase of the carbody vibration of the longitudinal or vertical direction. In this research, to enable the reduction of the excitation of the carbody vibration while maintaining the original function of yaw dampers to prevent bogie hunting motion, a new mounting structure of yaw dampers on railway vehicles has been developed. The new mounting structure enables to reduce the excitation force transmitted from a bogie frame to a carbody through yaw dampers. In this paper, the effect of yaw dampers on the carbody vertical vibration is firstly shown based on the results of an excitation test of a full-scale vehicle, then the outline of the new mounting structure for yaw dampers and the design and manufacture of the prototype device are presented. The vehicle dynamics model based on multi body dynamics was constructed and the suppression effect of the yaw damper force generated to movement in the direction other than the yawing direction of a bogie was verified by the numerical simulation. Moreover, the prototype device was installed on a full-scale test vehicle and a bogie hunting motion test was carried out to verify the running stability.

著者

宮本 岳史 石田 弘明 松尾 雅樹

出版者

一般社団法人日本機械学会

雑誌

日本機械学会論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.64, no.626, pp.3928-3935, 1998-10-25

参考文献数

10

被引用文献数

4

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We have developed the new simulation program which can deal with the large displacement, as the railway vehicle derails or overturns and wheels leave from rails. The dynamic behavior of railway vehicles running on track vibrated due to earthquake is analyzed, using this numerical simulation. The tentative running safety limits are proposed, that show the critical amplitude of track vibration at each frequency against the derailment. Moreover, the influence of vertical track vibration besides lateral one on the running safety limits is investigated. As a result, it is found that the vehicle running safety against earthquake has strong relation to the lateral track vibration, although the vertical vibration promotes the jumping of wheels. In the low frequency area, the rolling of carbody is excited gradually, and then the vehicle overturns, when it suffers the large amplitude seismic motion. In the high frequency area, the wheel flange comes into collision with rail at the first or second vibration, and the wheel jumps and leaves from rail. In respect of the critical track acceleration, railway vehicles have a tendency to be able to stand the earthquake with high frequency vibration more than 1.4 Hz.

著者

土井 久代 西尾 壮平 後安 慧 宮本 岳史 上田 洋

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.76, no.770, pp.2440-2446, 2010-10-25

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It is very important to secure running safety of railway vehicles even when vehicles get derailed. In 2004, a Shinkansen train was derailed by a huge earthquake and its derailed wheels ran on concrete slabs. Taking account of this kind of accidents, a number of vehicle-guidance devices have been developed. Some of these devices are designed so as to lead derailed wheels onto a runway made of concrete slabs. In order to simulate the derailed cars running behavior on a runway of concrete slabs, it is necessary to make clear creep force characteristics and friction coefficients between wheels and concrete slabs, which are essential elements in determining vehicle dynamics. However, there is scarcely a study of rolling contact between steel wheels and concrete slabs; therefore the authors have executed an experimental investigation to evaluate creep force characteristics and friction coefficients between a steel testing wheel and a concrete slab.