竖向环境振动对人车路系统耦合振动的影响

为分析竖向环境振动对人车路系统耦合振动的影响,人体采用并联动力模型,车辆采用7自由度全车模型,路面采用Kelvin地基上梁单元进行模拟,通过车路之间的动态轮胎力建立起考虑竖向环境振动作用的人车路耦合振动方程；运用New-mark积分法对方程组进行求解,采用人体竖向振动加速度均方根值对车辆乘坐舒适度进行评价；对地震波频率和地震波幅值对系统振动的影响进行讨论,以及车辆乘坐舒适度和乘坐者人体生理反应进行分析.数值分析结果表明：竖向环境振动加剧了人车路系统的振动,显著增大了车辆乘坐舒适度指标；地震波频率和地震波幅值对车辆乘坐舒适度的影响都很大.

Influence of vertical ambient vibration on the body-vehicle-road coupled vibrating system

In order to study the effect of vertical ambient vibration on coupling vibration of body-vehicle-road sys- tem, the human body was simplified as the parallel dynamic model, the vehicle was simplified as the seven-freedom vibrating model, and the road was supposed as the Euler Beam on the Kelvin base. And then based on the interaction force between the road and the vehicle, the dynamic functions of the vehicle-road coupled system were derived. The functions were solved with the New-mark method. The riding comfort of the vehicle was appraised with the RMS of the body vibrating acceleration. The effects of the seismic wave frequency and its amplitude on the sys- tem vibration were analyzed, and the vibrating comfort of the vehicle and human physiological responses were dis- cussed. The numeric analysis results indicate that the vertical ambient vibration aggravates the vibration of the body-vehicle-road coupled system, and also enlarges the value of the vibrating comfort of the vehicle; the seismic wave frequency and its amplitude have great effect on the vibrating comfort of the vehicle.