基于人体敏感频率的二自由度动力吸振器研究  

Study on Two-dimensional Dynamic Vibration Absorber Based on Human Sensitive Frequency

作　　者：孙煜 周劲松 宫岛 孙文静 夏张辉 SUN Yu;ZHOU Jinsong;GONG Dao;SUN Wenjing;XIA Zhanghui(Institute of Railway and Urban Rail Transit,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学铁道与城市轨道交通研究院

出　　处：《铁道学报》2019年第6期46-52,共7页Journal of the China Railway Society

基　　金：国家自然科学基金(51805373);“十二五”国家科技支撑计划(2015BAG19B02);国家科技支撑计划(2015BAG13B01)

摘　　要：从振动对人体生理影响出发,结合平稳性权重函数和实测高速动车组功率谱密度,指出对车体刚性振动控制的重要性。提出采用基于加速度的二自由度动力吸振原理,设计抑制车体浮沉及点头振动的二自由度吸振器。建立典型高速动车组单车垂向动力学模型,采用虚拟激励法及平稳性快速算法分别计算车体响应加速度功率谱密度及运行平稳性。研究结果表明,二自由度动力吸振器对车体浮沉及点头振动具有良好的抑制作用,能够提高车辆运行平稳性,当二自由度动力吸振器实现最优同调时,对点头及浮沉振动的抑制效果最佳。Based on the effect of vibration on human physiology, the importance of rigid body vibration control was pointed out by combining the stationary weight function and the measured power density of high-speed EMU. A vertical dynamic model of high-speed EMU was established. The theory of two-dimensional dynamic vibration absorber based on acceleration was used to control the bounce mode and pitch mode vibration of the car body. The virtual excitation method and the stationary fast algorithm were used to calculate the response power spectral density and operation stability of the vehicle body respectively. The results show that the two-dimensional dynamic vibration absorber can effectively reduce the vehicle body floating and nodding vibration and improve the vehicle running stability. When the two-dimensional dynamic vibration absorber achieves the optimal co-ordination, the bounce mode and pitch mode vibration of the car body are suppressed to the greatest extent.

关 键 词：运行平稳性 功率谱密度 动力吸振器 刚性振动 

分 类 号：U270.1[机械工程—车辆工程]