Development of torus-shaped elastic body as a vibration absorber for flexural vibration in railway vehicle carbody and its experimental validation using commuter-type vehicle
Development of torus-shaped elastic body as a vibration absorber for flexural vibration in railway vehicle carbody and its experimental validation using commuter-type vehicle
复制标题
轨道车辆车体弯曲振动环形弹性体减振器的研制及其通勤型车辆的实验验证
DOI：
10.1299/mej.16-00467
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Yuki Akiyama
中科院分区：
文献类型：
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作者：
T. Tomioka;Satoshi Tachikawa;Yuki Akiyama
研究了利用弹性体的变形作为动力吸振器（DVA）来减小对乘坐舒适性有较大影响的轨道车辆车体弯曲振动的方法。考虑到轨道车辆的实际应用，提出了圆环形（在本研究中称为“圆环”）作为弹性体。开发了使用有限元（FE）分析来设计弹性圆环的数值模型，并且已经证明，圆环的形状和尺寸可以通过FE模型来确定，以便具有期望的固有频率。设计并实际制造了一个用于轨道车辆DVA的充水橡胶圆环。为了验证充水弹性圆环的DVA效应，利用不锈钢车体的通勤型试验车进行了一系列稳态振动试验。由于测试车辆在地板上测量的频率响应函数（FRF）上显示出两个峰值，并且为了改善车辆的行驶品质，应同时降低这两个峰值，因此作者将弹性圆环体应用为“双层”样式（将一个圆环体堆叠在另一个圆环体上）。这两个峰值都成功地通过应用双层弹性环面来降低。研究结果表明，双层圆环结构具有两自由度系统的特点，从而达到了多模态减振的效果。研究了在楼板上施加圆环的数量及其分布对减振效果的影响。
This paper presents a study to reduce flexural vibrations of rail vehicle carbody, which have large impact on ride quality, by utilizing deformation of an elastic body as a dynamic vibration absorber (DVA). Donut-shape (called "torus" in this study) is proposed as the elastic body considering practical application to rail vehicles. A numerical model to design an elastic torus using finite element (FE) analysis was developed, and it has been demonstrated that the shape and the size of a torus can be determined so as to have desired natural frequency by the FE model. A torus dedicated to a DVA for rail vehicles made of rubber filled with water was designed and manufactured actually. In order to validate the DVA effect of the water-filled elastic torus, a series of stationary vibration tests using a commuter-type test vehicle with stainless steel carbody was conducted. Since the tested vehicle showed two peaks on the frequency response function (FRF) measured on the floor and both of them should be reduced simultaneously to improve ride quality of the vehicle, the authors applied the elastic torus as "double-decker" style (stack a torus up on another torus). Both of the peaks were successfully reduced by applying the double-decker elastic torus. It has been confirmed that the multi-modal vibration reduction effect was achieved because a set of double-decker torus act like a two-degrees-of-freedom (2-DOF) system. Influence on the vibration reduction effect by the difference of the number of applied tori and their distribution on the floor were investigated.