基于车-椅耦合的转向架垂向悬挂系统阻尼比协同优化

针对高速列车转向架垂向悬挂系统中存在的阻尼匹配问题,根据1/4车体-座椅垂向行驶振动模型,利用Matlab/Simulink建立了转向架垂向悬挂系统阻尼比协同优化设计仿真模型.以人体振动舒适性最佳为目标,建立了转向架一系和二系垂向悬挂系统阻尼比协同优化设计数学模型.以轨道高低不平顺作为输入激励,以一系及二系悬挂垂向行程和一系悬挂动静态力之比为约束条件,建立了基于转向架车体-座椅耦合的转向架垂向悬挂系统阻尼比协同优化设计方法.通过设计实例及仿真验证可知,优化后高速列车的乘坐舒适性显著提高,座椅垂向振动加权加速度均方根值降低了21.7%,表明所建立的优化设计方法是正确的.

Collaborative optimization of bogie vertical suspension damping ratio based on body-seat coupling

For the problem of the optimal damping matching of high-speed train bogie vertical sus-pension system,according to the 1/4 body-seat vertical vibration model of high-speed train,using Matlab/Simulink,a collaborative optimal design simulation model for damping ratio of bogie ver-tical suspension is established.Taking optimal ride comfort as target,a collaborative optimal de-sign mathematical model for damping ratio of bogie vertical suspension is built.The track vertical irregularity as input,the primary and secondary suspension vertical stroke and the ratio of dy-namic and static force for primary suspension as constraint conditions,a collaborative optimiza-tion design method for damping ratio of bogie vertical suspension damping ratio based on bogie-body-seat coupling is presented.With a practical example of high-speed train,the damping ratio is designed and validated by simulation.The results show that the ride comfort of high-speed train has been significantly improved under the damping ratio optimized and the seat vertical fre-quency-weighed RMS (Root Mean Square)acceleration value is reduced by 21.7%.Thus,the collaborative optimization method is correct.