高铁座椅悬置系统振动特性仿真及阻尼比优化

Vibration Simulation and Damping Ratio Optimization of Seat Suspension System for High-Speed Rail

针对高铁座椅悬置系统中存在的阻尼匹配问题,根据1/4车体-座椅垂向振动模型,建立了高铁座椅悬置系统阻尼比优化设计仿真模型;以人体振动舒适性最佳为目标,建立了座椅悬置系统阻尼比优化设计数学模型;以轨道高低不平顺为输入激励,以座椅悬置垂向行程为约束条件,建立了高铁座椅悬置系统阻尼比优化设计方法。通过设计实例及仿真分析可知,阻尼比的设计值能够有效提高座椅的乘坐舒适性,表明所建立的座椅悬置系统阻尼比优化设计方法是可行的。

According to the 1/4 body-seat vertical vibration model of high-speed rail, an optimal design simulation model for damping ratio of seat suspension was established. An optimal design mathematical model for damping ratio of seat suspension was built with the optimal ride comfort as the target. Taking the track vertical irregularity as input and the seat suspension vertical stroke as constraint condition, an optimization design method for damping ratio of seat suspension based on track excitation was presented. With a practical example, the damping ratio was designed and validated by simulation. The results show that the damping ratio value design method can effectively improve ride comfort.