考虑子结构异步长的高速铁路车桥耦合振动实时混合试验系统稳定性预测方法

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中图分类号：TU311.2 文献标志码：A DOI:10.16385/j.cnki.issn.1004-4523.202403062

¹，12

(1.，重庆401121；2.，北京100124)

Stability prediction method for real-time hybrid testing system of high-speed railway vehicle-bridge coupling vibration considering asynchrony substructure time step

LIU Hao1², TANG Zhenyun1² (1.Chongqing Research Institute of Beijing University ofTechnology, Chongqing 401121, China; 2.State KeyLaboratoryofBridgeEngineeringSafetyandResiliance,BeijingUniversityofTechnology,Beijing1024,China）

Abstract:Inrecetyears，eal-tiedttingtehloasbenapdtotevbratiotestigofigspdrlahicle bridgecoupledsystems.However，thebridgemodelinthevehicle-bridgecoupledRTHTsystemusuallasalargenumberofdegesof fredom，esultingineumeicalsubsructureitegatiosteinglarertanthloaigiteralofthicalsubtructuhich posesachallegetotabilitypredictiofteyst.Todressthisiss，tissudypropossaabilitypredictioeodsed onthdisceteatesacequatiioalompreesielyosideringtingteaofbdge coupledsystemandteiflueceof tetieasychoybetwntheumricalandphysicalsubstructuresontestability.Usigavehicle bridgecoupledsystemconstructedfromaquarter-carmodelandasimplysupportedbeammodelasabenchmarkexample,numerical simulationsandexprimetalvalidatiosarecardoutforteproosdasychooustestepRTsytem.Resultsindicatethatathe integrationstepsizcreass,testabilityofteehiclebdgecoupledRsytemdceassandteproposedmtodcanately predict the stability of vehicle-bridge coupled RTHT system with different step sizes.

Keywords:real-timehybridtest;vehicle-bridgecouplingvibration;asynchronism;tmevariability;stabilityprediction

车桥耦合实时混合试验系统将铁路桥梁作为数值子结构，在计算机中进行建模和求解，同时将车辆作为物理子结构，利用振动台进行加载和测量，数值子结构和物理子结构在较小的时间步长(

车桥耦合系统的复杂动力特性对实时混合试验的关键技术提出了挑战。（剩余29606字）