车桥耦合振动的车轮多点接触模型与试验验证  

Multi-point wheel contact model and test verification of vehicle-bridge coupling vibration

作　　者：龙金喜 朱尚清 荚瑞馨 董方[1,2] 蔡刚 LONG Jinxi;ZHU Shangqing;JIA Ruixin;DONG Fang;CAI Gang(National Key Laboratory of Bridge Safety and Resilience,Beijing University of Technology,Beijing 100124,China;Shenzhen Urban Public Safety Technology Research Institute Co.,Ltd.,Shenzhen 518046,China;Chongqing Qiaoan IoT Technology Co.,Ltd.,Chongqing 401120,China)

机构地区：[1]北京工业大学桥梁工程安全与韧性全国重点实验室,北京100124 [2]深圳市城市公共安全技术研究院有限公司,广东深圳518046 [3]重庆桥安物联科技有限公司,重庆401120

出　　处：《合肥工业大学学报(自然科学版)》2025年第4期555-562,共8页Journal of Hefei University of Technology:Natural Science

基　　金：国家自然科学基金资助项目(51908012);深圳市科技计划资助项目(ZDSYS20210929115800001)。

摘　　要：针对现有车桥耦合数值模拟方法精度不足和计算效率偏低的问题,文章以某简支T梁桥为研究对象,提出一种考虑实际路面不平整度的车桥耦合数值模拟方法,通过ABAQUS建立多点接触模型,基于毫米波雷达测试数据验证模型的准确性;分析了在实测桥面不平整度以及规范中4种等级的桥面不平整度条件下,多点接触模型与传统单点接触模型的接触作用效应,并利用某简支空心板桥的测试结果验证了所述模型的有效性与通用性。结果表明:毫米波雷达不仅具有非接触式测量的便利性,而且能够实现高精度的动态测试;多点接触模型比单点接触模型能更精确地预测车辆与桥梁的相互作用,随着桥面不平整度的变差,多点接触模型的计算精度更显著,在D级路面下2种模型的最大动挠度误差可达9.59%。某简支空心板桥的测试结果验证了多点接触模型的适应性,证明了多点接触模型较高的精度和可行性。To address the inaccuracies and inefficiencies in current vehicle-bridge coupling simulation methods,this study focuses on a simply-supported T-beam bridge and introduces a numerical simulation approach that considers real pavement roughness.A multi-point contact model is developed by utilizing ABAQUS and its accuracy is validated through comparison with millimeter-wave radar data.The impact of contact of the multi-point and traditional single-point contact models is investigated using the measured deck roughness and four levels of deck roughness in the code.Testing on a simply-supported hollow slab bridge confirms the effectiveness and applicability of the multi-point contact model.The findings demonstrate that millimeter-wave radar enables precise and convenient non-contact measurements and that the multi-point contact model outperforms the single-point model in predicting vehicle-bridge interaction.Particularly,the multi-point model shows enhanced accuracy in the presence of severe deck roughness,with a maximum dynamic deflection error of 9.59%lower than that of the single-point model under class D pavement conditions.The results from the hollow slab bridge test support the feasibility and utility of the multi-point contact model in accurately modeling vehicle-bridge dynamics.

关 键 词：车桥耦合 车轮接触模型 试验验证 毫米波雷达 桥面不平整度 

分 类 号：U446.1[建筑科学—桥梁与隧道工程] U461[交通运输工程—道路与铁道工程]