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高速动车组车下设备悬挂系统的解耦优化设计方法研究
作者:夏张辉 周劲松 宫岛 孙文静 孙煜 
单位:同济大学 铁道与城市轨道交通研究院, 上海201804
关键词:高速动车组  车下设备  悬挂系统  橡胶元件  解耦度 
分类号:
出版年·卷·期(页码):2019·41·第3期(71-78)
摘要:

基于动力吸振理论,优化设计高速动车组车下设备固有频率,并研究车下设备耦合振动对车体振动性能的影响及其机理。随后分别提出了两种车下设备悬挂系统的解耦优化设计方法——正向解耦法和逆向解耦法。以解耦度和最优频率为优化目标,以橡胶元件三向刚度为约束条件,优化设计了橡胶元件的三向刚度。两种优化方法对比分析表明,车下设备以浮沉振动为主的振型均可获得良好的解耦度,振型频率可保持在最优设计频率附近,悬挂系统减振效果明显。与正向解耦法相比,逆向解耦法计算速度较慢,但设计效果更好,减振效果更佳,在实际运用中,可根据具体的计算速度与设计效果要求,合理选择解耦优化方法。

Based on the theory of dynamic vibration absorber, the inherent frequency of under chassis equipment was optimized. The influence of the coupling vibration of the under chassis equipment on the vehicle vibration performance and its mechanism was studied. Then two decoupling optimization design methods for under chassis equipment suspension system were proposed in this paper, which were forward decoupling method and inverse decoupling method. The three-direction stiffness of the rubber component in the under chassis equipment suspension system was collaboratively optimized by setting the decoupling degree and optimal frequency as optimization objectives, while the three-direction stiffness of the rubber component was set as the constraint condition. The comparison of the two optimization methods shows that the under chassis equipment can obtain favorable decoupling degrees in bouncing vibration mode, with the frequency of the vibration mode being kept near the optimal design frequency, resulting in significant damping effect of the suspension system. Compared with the forward decoupling method, the inverse decoupling method is slower in calculation speed, but better in  design effect and damping effect. In practice, the decoupling optimization design methods can be selected according to the specific calculation speed and design effect.

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