高速公路路基设计参数对车辆运行品质的影响

车辆—路基耦合而产生振动 ,为了更好地分析两者之间的相互作用 ,笔者提出了车辆—路基竖向耦合振动模型 ;并利用该耦合振动模型及二维有限元方法 ,探讨了高速公路不同路基设计参数对车辆运行品质的影响规律。研究结果表明 :路基刚度的变化对车辆竖向振动加速度的影响较大 ;路面平整度与车辆竖向振动加速度几乎成线性关系 ;随行车速度的增加车辆的舒适度将降低。

Influence of Highway Road Bed Design Parameters on Vehicle Motion Property

The vehicle-road bed coupling produces vibration. In order to analyze the mutual relationship between the vehicle and the road bed,the vertical vehicle-road bed coupling dynamic model was proposed. Using this model and two-dimensional finite element method,the influence regularity of different highway road bed design parameters on vehicle motion property was analyzed. The study showed that the change of the road bed stiffness exerted greater influence on vertical vehicle acceleration;and the smoothness of pavement correlated almost linearly with vertical vehicle acceleration. The comfortableness of vehicle lessened as the speed of the vehicle increased.