简介:Tunedmassdampers(TMD)arewellknownasoneofthemostwidelyadopteddevicesinvibrationcontrolpassivestrategies.Inthepastfewdecades,manymethodshavebeendevelopedtofindtheoptimalparametersofaTMDinstalledonastructureandsubjectedtoarandombaseexcitationprocess,butmostofthemareusuallybasedonanimplicitassumptionthatallofthestructuralparametersaredeterministic.However,inmanyrealcasesthissimplificationisunacceptable,sorobustoptimaldesigncriteriabecomesaviablealternativetobettersupportengineersinthedesignprocess.InRobustDesignOptimization(RDO)approaches,indeedthesolutionmustbeabletonotonlyminimizetheperformancebutalsotolimititsvariationinducedbyuncertainty.MostofthecurrentlyavailableRDOmethodsarebasedonaprobabilisticdescriptionofthemodeluncertainty,evenifinmanycasestheyarenotabletoexplicitlyincludetheinfluenceofallthepossiblesourcesofuncertainties.Therefore,inthisstudy,afuzzyversionoftherobustTMDdesignoptimizationproblemisproposed.Theconsistencyofthefuzzyapproachisstudiedwithrespecttotheavailablenon-probabilisticformulationsreportedintheliteratureandanapplicationtoanexampleofarobustdesignofalinearTMDsubjectedtobaserandomvibrationsinthepresenceoffuzzyuncertainties.Theresultsshowthattheproposedfuzzy-basedapproachisabletogiveasetofoptimalsolutionsbothintermsofstructuralefficiencyandsensitivitytomechanicalandenvironmentaluncertainties.
简介:在这篇论文,一个新奇参量的基于模型的分解方法为变化时间的结构监视的结构的健康被建议。为这个目的,先进功能系列的时间依赖者汽车回归的动人的一般水准(FS-TARMA)技术被用来估计在参量的信号分解计划使用的参数和革新变化。另外,一个唯一的特征抽取和减小方法基于分解信号,已知的同样潜伏的部件(LC),被建议。为了在实验室评估建议方法,数字模拟和试验性的研究的效率,在变化时间的结构上被进行,在损坏的各种各样的类型被介绍的地方。模糊专家系统(FES)被用作一个分类工具当时,证明建议方法成功地识别不同结构的条件与另外的方法相比基于非减少、平常的特征抽取。