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中文摘要：
随着铁道车辆运行速度的提高，复杂的车下设备对车体的振动影响不能忽视。将车体考虑成等截面欧拉梁，建立了车辆刚柔耦合的垂向动力学简化模型，考虑了设备弹性悬挂和刚性悬挂两种连接方式对车体振动的影响。结果显示，弹性悬挂能够有效抑制设备高频振动能量的传递，降低车体的弹性振动。为了讨论车下设备弹性悬挂参数与车体结构振动的匹配关系，详细地分析了不同悬挂刚度和阻尼对车体振动的影响。当刚度设置在合适的范围时，由于车下设备与车体间同向和反向运动，使车下设备的传递率下降，车体的振动降低。同时，提高悬挂阻尼也在一定程度上能够抑制车体的振动。
英文摘要：
With the increasing of running speed of railway vehicles, the carbody vibration induced by the equipments suspended on carbody underframe can not be ignored any more. A simplified rigid-flexible coupling dynamics model is established,in which the carbody is modeled as a simple uniform Euler beam with free ends. The influence of suspension modes of the equipments, rigid or elastic, on the vibration of carbody is discussed. The results show that the use of elastic suspension can effectively restrain the transfer energy of high frequencies and decrease the carbody vibration, especially the first bending modal vibration. In order to study the relation between suspension parameters and carbody structure vibration, the effect of suspension stiffness and damping values is analyzed in detail. When the stiffness is changed within a certain range, the equipment transfer rate and carbody vibra- tion decreased as the same direction and reverse motion. At the same time, rising the suspension damping can also restrain the carbody vibration.
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