考虑相干路面不平度的车-路-桥耦合系统振动分析  

Vibration Analysis of Vehicle-Pavement-Bridge Interaction System Considering Coherent Road Roughness

作　　者：任剑莹 李梦[1,2] 孙志棋 陈宇航[1,2] REN Jianying;LI Meng;SUN Zhiqi;CHEN Yuhang(Department of Engineering Mechanics,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Engineering Mechanics Basic Discipline Research Center,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shiiiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学工程力学系,河北石家庄050043 [2]石家庄铁道大学河北省工程力学基础学科研究中心,河北石家庄050043 [3]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043

出　　处：《石家庄铁道大学学报（自然科学版）》2024年第3期1-11,共11页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(12372018);河北省自然科学基金(A2022210007);河北省高等学校科学技术研究项目(ZD2022019)。

摘　　要：在车-桥耦合振动系统中,路面不平度作为主要激励之一,直接影响着车辆、路面铺装及桥体的动力响应,而在已有的车-桥耦合振动分析中,还少有考虑路面铺装及路面不平度相干性(即左右轮非一致路面不平度)的研究.为获得更接近实际的车-桥耦合振动分析模型,建立了三维车-路-桥耦合(VPBI)系统有限元模型.路面铺装的黏弹性属性用Prony级数表征;路面不平度由逆傅里叶变换法构建,通过左右轮路面不平度相位差引入相干性,采用约束耦合法实现车辆、路面不平度和路面铺装的位移协调,得到三维VPBI系统有限元模型,并分析左右轮非一致路面不平度及其相干强度对车辆、路面铺装和桥体动力响应的影响情况.结果表明,在建立更接近实际的更精细化的三维VPBI计算模型时,须考虑相干路面不平度对系统动力响应的影响.In the vehicle-bridge interaction system,road roughness is one of the main excitations,which directly affects the vehicle dynamic response,pavement and bridge.However,in the existing vehicle-bridge interaction analysis,there are few studies considering the coherence of pavement and road roughness(the non-uniform road roughness of left and right wheels).In order to obtain a more realistic vehicle bridge interaction analysis model,a three dimensional vehicle pavement-bridge interaction(VPBl)system finite element model was established.The viscoelastic properties of pavement were char acterized by Prony series.The road roughness was constructed by the inverse Fourier transform meth od.The coherence was introduced by the road roughness phase difference of the left and right wheels The constraint coupling method was used to realize the vehicle displacement coordination,the road roughness and the pavement,The finite element model of the threedimensional VPBl system was obtained,and the influence of the left and right wheels non-uniform road roughness and its coherence strength on the vehicle dynamic response,the pavement and the bridge was analyzed.The results show that the influence of coherent road roughness on the dynamic response of the system should be consid ered when establishing a more realistic and refined three-dimensional VPBl calculation model.

关 键 词：桥梁工程 车-路-桥耦合系统 数值模拟 动力响应 路面不平度 相干性 

分 类 号：U441[建筑科学—桥梁与隧道工程]