第51卷2023年第2期广州建筑GUANGZHOUARCHITECTUREVol.51No.2,2023基于H2范数的大跨人行桥舒适度TMD控制★陈坤桦1,2(1.广州大学土木工程学院,广州510006)(2.广州大学风工程与工程振动研究中心,广州510006)摘要:海心桥是跨越珠江的大跨度钢结构、斜拱曲梁组合人行桥,其构造与受力复杂,满足人行舒适度是要解决的关键问题之一,而设置调谐质量阻尼器(TMD)是振动控制的有效方法。本文基于ANSYS建立海心桥有限元模型,分析桥梁动力特性,基于阻尼器工作原理和H2范数控制法实现参数优化。对海心桥进行减振效果分析,并与一定质量比范围内使TMD减振效率最高的DenHartog经典控制法进行对比。研究表明:加装TMD后各阶敏感模态减振效果明显,最大减振率可达74%,尽管经典控制法的减振效果更优,但其TMD质量为H2控制法的2~5倍,减振率仅提高4%至20%,H2范数控制法可通过较低的TMD造价达到舒适度控制的目的。关键词:海心桥;步行舒适度;振动控制;TMD;H2范数中图分类号:U441+.3文献标识码:A文章编号:1671-2439(2023)02-009-04作者简介:陈坤桦(1996—),男,硕士研究生,主要从事工程结构振动控制方面研究,E-mail:khchen1996@163.com。TMDControlofComfortLevelforLarge-spanFootbridgebytheH2NormCHENKun-hua1,2(1.SchoolofCivilEngineering,GuangzhouUniversity,Guangzhou510006)(2.ResearchCenterforWindEngineeringandEngineeringVibration,GuangzhouUniversity.,Guangzhou510006)Abstract:HaixinBridgeisalong-spansteelfootbridgewithinclinedarchandcurvedbeamspanningthePearlRiver.Itsmechanicalbehaviorisverycomplicated,someetingthepedestriancomfortisoneofthekeyproblemstobesolved,andinstallationoftunedmassdamper(TMD)isaneffectivemethodtocontrolthevibration.Inthispaper,thefiniteelementmodeloftheHaixinBridgeisestablishedbasedonANSYS,thedynamiccharacteristicsofthebridgeareanalyzed.ThecontrolparametersofTMDareoptimizedbasedonitsworkingprincipleandtheH2normcontrolmethod.Thevibrationreductionofthebridgeareanalyzed,andcomparedwiththeDenHartogclassicalcontrolmethodthathasthehighestvibrationreductionefficiencyofTMDwithinacertainmassratiorange.ThestudiesshowthatafterinstallingtheTMD,thevibrationreductionineachorderofsensitivemodeisobvious,andthemaximumrateofvibrationreduc...