考虑路面不平整度因素的车路耦合振动模型的建立  

Dynamic model for a vehicle-pavement coupled system considering pavement roughness

作　　者：许海亮[1] 袁勇[2] 屈铁军[1] 唐浚然 

机构地区：[1]北方工业大学建筑工程学院,北京100144 [2]同济大学地下建筑与工程系,上海200092

出　　处：《振动与冲击》2014年第19期152-156,共5页Journal of Vibration and Shock

基　　金：北京市自然科学基金资助项目(8142015);北京市属高等学校人才强教计划资助项目(PHR201107106)

摘　　要：目前在道路结构相关计算分析中车辆荷载多以静力荷载为主,均未考虑在路面不平整度激励下车路耦合效应的影响。针对这种情况本文在已有车辆模型的基础上,考虑了道路结构振动的影响建立了车路耦合模型。经现场实测数据的验证,该模型能够较好的反映车路作为一个大系统的振动情况,是一个形式简单,计算方便,应用价值较高的模型。利用耦合模型和传统模型进行对比分析,发现车路耦合效应对车辆悬挂系统的振动影响较小;但对车辆非悬挂系统的振动和车路间作用力(中心化)的影响较大。实际算例显示较传统模型,耦合模型下车路间作用力最大幅值增大七倍,因此对于车路共同作用系统下的道路结构振动研究车辆耦合效应是一个重要的考虑因素。In the previous computational models related to roads,vehicle loading was considered as static loads without considering the coupling efffect between vehicle and road under excitation of pavement roughness.On the basis of a known vehicle model,a new dynamic model for a vehicle-pavement couplied system was established considering influence of pavement structure vibration.The simulation results of the new model were verified with the data measured in field.The new model could reflect the true vibration of a vehicle-pavement coupled system.The new model had the characters of simple form and a higher application value.The comparison study on the vibration responses of the traditional model and the vehicle-pavement coupled model showed that the vehicle suspension system is little influenced by the vehicle-pavement coupling effect but the vehicle non-suspension system and the random forces （centralization ）between vehicle and pavement are influenced obviously by the vehicle-pavement coupling effect.Numerical calculation indicated that the maximum amplitude of the random forces in the coupled model is 7 times higher than that in the uncoupled model, so the influence of the vehicle-pavement coupling effect cannot be neglected in the study on pavement structure vibration.

关 键 词：车辆 道路 耦合系统 路面不平整度 线性模型 

分 类 号：U416[交通运输工程—道路与铁道工程]