【摘要】 车辆采用13自由度三维全车模型,路面采用Kelvin地基上Euler梁单位进行离散,通过路面与轮胎接触点的平衡,建立起可以考虑车辆侧向滑动的车路耦合振动模型.将路面初始不平顺视为系统的竖向自激激励源,地震作为外部激励,建立起竖向和横向地震荷载共同作用下车路耦合方程,采用New-mark积分法对耦合方程组进行求解.数值分析结果表明,分析模型下,车路耦合系统的动力响应取决于地震荷载,而地震荷载作用会使车辆的行驶安全性和乘坐舒适性明显下降;横向地震荷载对车辆和路面的横向振动有显著影响,对车辆的竖向振动可忽略;竖向地震荷载对车辆和路面的竖向振动影响较大,对车体的横向振动有一定程度的影响,以至于在评判车辆运行安全性时必须考虑其影响.更多还原

【Abstract】 The vehicle is simplified as a three dimension vibrating model with thirteen-freedoms.The road is supposed as an Euler Beam on the Kelvin base and divided with beam elements.Based on the force equilibrium between the road and the tire,the vibrating model of a vehicle-road coupling system considering the transverse displacement of the vehicle is presented.Taking the road irregularities as system’s self-excitation source and a seismic action as an external excitation,the dynamic functions of the vehicle-road coupled system are derived under vertical and transverse earthquake.The functions are solved with the New-mark method.The results show that: the dynamic response of the vehicle-road coupling system depends on the seismic intensity under the model of this paper,seismic intensity will make the vehicle’s safety and riding comfort to decline significantly,the transverse seismic intensity has a significant impact on the transverse dynamic response of a vehicle and the influence on the vertical vibration of a vehicle can be ignorant,and the vertical seismic intensity has a major impact on the vertical vibration of a vehicle and road.However,the influence of the vertical seismic intensity on the transverse acceleration of a vehicle is so important that the impact of vertical seismic intensity on judging the safety of a vehicle must be considered.更多还原