考虑路面不平度的车桥耦合系统快速建模与动力分析方法  

Fast modeling and dynamic analysis method for vehicle-bridge interaction system considering road roughness

作　　者：冯东明[1,2,3] 黎剑安 吴刚[1,2,3] 张建[2,3] Feng Dongming;Li Jian an;Wu Gang;Zhang Jian(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China;National and Local Joint Engineering Research Center for Intelligent Construction and Maintenance,Southeast University,Nanjing 211189,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学混凝土与预应力混凝土结构教育部重点实验室,南京210096 [2]东南大学智慧建造与运维国家地方联合工程研究中心,南京211189 [3]东南大学土木工程学院,南京211189

出　　处：《东南大学学报（自然科学版）》2022年第6期1088-1094,共7页Journal of Southeast University：Natural Science Edition

基　　金：中央高校基本科研业务费专项资金资助项目(2242022k30024);江苏省交通运输科技资助项目(2021Y15)。

摘　　要：为了克服车桥耦合系统在处理路面不平度时的繁琐性,提出了一种车桥耦合系统的快速建模方法.该方法将桥梁位移和路面不平度作为边界条件施加给车辆系统,将车辆荷载作为输入施加给桥梁系统,简单有效地实现了车辆与桥梁之间的耦合.为了验证所提方法的准确性,建立了二维车桥耦合系统仿真模型,考虑了车速和路面不平度等影响因素,并将仿真结果与理论解进行对比.结果表明,桥梁位移模拟误差不超过2%,桥梁加速度模拟误差仅为4%左右,说明所提方法能快速有效地完成车桥耦合系统的建模,有效模拟路面不平度,为车桥耦合系统建模提供新的指导.To overcome the cumbersome of the vehicle-bridge interaction system when imposing road roughness,a fast-modeling method for the vehicle-bridge interaction system was proposed.The bridge displacement and the road roughness were applied to the vehicle system as the boundary condition.The vehicle loads were applied to the bridge system as the input.The interaction between the vehicle and the bridge was achieved simply and effectively.To verify the accuracy of the proposed method,a two-dimensional simulation model for the vehicle-bridge interaction system considering the vehicle speed and the road roughness was established,and the simulation results were compared with the theoretical solution.The results show that the bridge displacement error is less than 2%,and the bridge acceleration error is only about 4%,indicating that the proposed method can simulate the vehicle-bridge interaction system fast and accurately and the road roughness can be simulated effectively.It provides new guidance for modeling the vehicle-bridge interaction system.

关 键 词：车桥耦合系统 位移协调法 路面不平度 有限元建模 

分 类 号：TU398[建筑科学—结构工程]