资源描述:
《运营监测论文:大跨度铁路钢桁斜拉桥传感器优化布置研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、运营监测论文:大跨度铁路钢桁斜拉桥传感器优化布置研究【中文摘要】大跨桥梁的安全运营关系到国家的交通、经济发展、军事乃至人民生命财产安全,大跨桥梁的健康监测技术也成为研究和发展的一个重要领域,本文以韩家沱长江大桥(大跨度铁路钢桁斜拉桥)运营监测系统方案设计为背景,研究了运营监测系统的架构,在设计其硬件系统时,成功运用改进遗传算法对传感器进行寻优布点。主要完成了以下几个方面的工作:(1)分析了传感器优化布置的数学模型及其约束条件,用二重结构遗传编码考虑传感器数目固定这一约束条件的满足问题,并对选择算子、交叉算子和变异算子进行相应改进,引入了自适应交叉概率和自适应变异概率,确保了改进遗传
2、算法的收敛性,提高了效率。(2)基于模态应变能准则和MAC准则针对不同构件(监测对象)和不同传感器(监测)设计了四种适应度函数,并比较分析了这两种准则。(3)运用改进遗传算法对韩家沱长江大桥主要构件的传感器进行了优化布置,总结了结果的特点,讨论了对结果的影响因素。并运用韩家沱长江大桥有限元数值模型分析大桥的静动力特性对结果进行验证和必要的修改。(4)对韩家沱长江大桥运营监测系统方案总体架构、硬件系统进行了设计,以及对结构状态预警进行了介绍。【英文摘要】Thesafeoperationoflargespanbridgeshasclosecontactwiththecountry’st
3、ransportation,economicdevelopment,militaryandevenpeople’slivesandpropertysafety,largespanbridgehealthmonitoringtechnologyresearchanddevelopmenthavebecomeanimportantfield.Inthispaper,thedesignofoperationalmonitoringsystemsforHanjiatuoYangtzeRiverBridge(alargespanrailwaysteeltrusscablestayedbrid
4、ge)asbackground,Iresearchedtheframeworkoftheoperati,onalmonitoringsystem,andsuccessfullysolvedtheproblemofoptimalplacementofsensorsusingimprovedgeneticalgorithminthedesignofthehardwaresystem.Icompletedthefollowingmajorareas:(1)First,themathematicalmodelofoptimalsensorplacementanditsconstraints
5、wereanalyzed,Iusedthedualstructureofgeneticcodeconsideringthefixednumberofsensors,correspondinglyselectionoperator,crossoveroperatorandmutationoperatorwereimproved,theconvergenceofimprovedgeneticalgorithmswasensuredandtheefficiencywasimprovedwiththeintroductionoftheprobabilityofadaptivecrossov
6、erandtheprobabilityofadaptivemutation.(2)Fordifferentcomponents(monitoringobjects)anddifferentsensors(monitoringpurposes),FourfitnessfunctionweredesignedbasedonModalStrainEnergycriteriaandMACcriteria,thetwocriteriawascomparedandanalysised.(3)Ihavedonetheoptimalsensorplacementforthemaincomponen
7、tsofHanjiatuoYangtzeRiverBridge,summarizedthecharacteristicsofresults,discussedthefactorsofresults,verifiedandnecessarilychangedtheresultsusingthestaticanddynamiccharacteristicsofHanjiatuoYangtzeRiverBridgefiniteelementmodel.(4)Thethege