局部不平整引起的车路动态响应分析  

Study on Dynamic Response of Automobile-road System Caused by Local Unsmoothness of Road Surface

作　　者：单景松[1] 元松 

机构地区：[1]山东科技大学山东省土木工程防灾减灾重点实验室,青岛266510 [2]上海市政规划设计研究院,上海200031

出　　处：《武汉理工大学学报（交通科学与工程版）》2010年第5期990-994,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家863计划项目(批准号:2006AA11Z110);山东科技大学"春蕾计划"项目资助

摘　　要：将汽车简化为弹簧阻尼模型,对行驶在道路上的车辆突然遇到路面不平整情况时,车路之间接触动荷载进行了求解,得到了车路动载与行驶速度、不平整波长等因素的关系.将得到的随时间和地点变化的车路动荷载,作为荷载边界条件加入道路结构数值计算模型,对路面各结构层的动荷载响应进行了求解分析.计算结果表明:在波长较短且速度较高时表面弯沉具有明显的波动规律;基层底部水平正应力主要与经过此点附近的荷载大小相关,与行车速度及荷载变化方式关系不大.Automobile is simplified into spring-damp model and the dynamic load between automobile and pavement is solved when local unsmoothness of road surface occurs suddenly.The variable regu- larity of dynamic load is got considering the influencing factors of motion velocity,wavelength of unsmoothness,etc.The dynamic load which changes with the time and site is inputted into numerical calculation model as the boundary condition and the dynamic response of pavement structure is obtained.The results show that the surface deflection of pavement has clear wave character on condition that wavelength is short and wave velocity is high.The bottom tension stress of base relates mainly to the value of near load compared with moving velocity and the change mode of load.

关 键 词：路面 局部不平整 动荷载 表面弯沉 层底拉应力 

分 类 号：U416.2[交通运输工程—道路与铁道工程]