基于双车接触点响应残差的桥梁模态参数识别方法研究  

BRIDGE MODAL PARAMETERS IDENTIFICATION BASED ON THE CONTACT POINT RESPONSE RESIDUES OF TWO VEHICLES

作　　者：陈诚 张静[1] 杜昌骏 杨栋 贺文宇[1] CHEN Cheng;ZHANG Jing;DU Chang-jun;YANG Dong;HE Wen-yu(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Earthquake Engineering Research&Test Center,Guangzhou University,Guangzhou 510006,China;Key Laboratory of Earthquake Resistance,Earthquake Mitigation and Structural Safety of Ministry of Education,Guangzhou 510006,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]广州大学工程抗震研究中心,广州510006 [3]工程抗震减震与结构安全教育部重点实验室,广州510006

出　　处：《工程力学》2025年第1期199-208,共10页Engineering Mechanics

基　　金：国家自然科学基金面上项目(52278303);安徽省自然科学基金杰出青年基金项目(2208085J20)。

摘　　要：针对“车辆扫描法”在桥梁模态参数识别过程中存在对路面粗糙度和车辆速度过于敏感等问题,提出一种新的基于接触点响应的车辆扫描法识别桥梁模态参数(频率和振型)。在考虑相位差的前提下对两车的接触点响应作差,利用该残差识别结构各阶模态频率以及对应的模态振型;给出了基于双车接触点响应残差进行桥梁模态参数识别的流程,通过数值算例验证了其可行性,并系统讨论了车辆速度、质量以及路面粗糙度等因素对识别结果的影响。数值结果表明:该文所提出的方法简单有效,能够在有效剔除路面粗糙度影响的前提下准确识别桥梁结构的模态参数。In order to solve the problem in which the‘vehicle scanning method’is too sensitive to road roughness and vehicle speed in the process of bridge modal parameter identification,a novel vehicle scanning method based on the contact point response is proposed to identify bridge modal parameters,i.e.,frequency and mode shape.The contact point response residuals of the two vehicles are calculated considering the phase difference,and the mode frequencies and corresponding mode shapes can be obtained based on the residuals.This paper presents the process of bridge modal parameter identification based on the contact point response residuals of two vehicles.The feasibility of this method is verified by numerical case studies,and the effects of vehicle speed,mass and road surface roughness on the identification results are discussed systematically.The numerical results show that the proposed method is simple and effective,which can accurately identify the modal parameters of bridge structure on the premise of effectively eliminating the influence of road surface roughness.

关 键 词：桥梁工程 模态参数识别 接触点响应 车-桥耦合振动 路面粗糙度 

分 类 号：O327[理学—一般力学与力学基础] U441.3[理学—力学]