摘要
为改善高速客车的路面不平度稳定性,研究了高速客车路面不平度干扰转向的机理及其影响因素。首先建立反映客车高速行驶时受到不平路面干扰产生转向运动的动力学模型,并推导出其状态方程。然后就前轴静态负荷、轮胎侧偏刚度、转向系统阻尼、前轮定位回正力矩等主要影响因素进行变参数动态仿真及单因素影响分析,得出增大前轴静态负荷、前轮定位回正力矩及减小转向系统阻尼是减小高速客车前端最大偏移量较为可行的措施。最后通过实车试验对采取改进措施后的效果进行了验证,结果显示关于该客车路面不平度稳定性的仿真结果与试验结果基本吻合。上述研究结果可为改善高速客车产品的路面不平度稳定性提供理论参考。
To improve pavement irregularity stability of high speed bus,working principle of this pavement irregularity disturbance steering movement and its influencing factors are researched.Firstly,dynamics model of bus＇s disturbance steering from pavement irregularity is established and corresponding state equation is obtained.Secondly,single factor influence analyses and dynamic variable parameter simulations of this steering movement in view of main influencing factors including static load on the front axle,tire cornering stiffness,coulomb damping in steering system and self-aligning torque from front wheel alignment are carried out.It is got that reducing coulomb damping in steering system and increasing static load on the front axle and self-aligning torque from front wheel alignment are feasible measures to decrease maximum lateral displace in the front of high speed bus.Finally,Vehicle tests are carried out to validate simulation results of maximal lateral displace on bus foreside under measures taken before and after,and test investigation shows that simulation predictions agree with test results.So some theoretic references can be obtained to improve pavement irregularity stability of high speed bus.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第13期84-89,共6页
Journal of Wuhan University of Technology
基金
江苏省自然科学基金(BK2008553)
关键词
高速客车
路面不平度
干扰转向
影响因素
实车试验
high speed bus
pavement irregularity
disturbance steering
influencing factor
vehicle test
