結(jié)構(gòu)統(tǒng)計(jì)能量分析子系統(tǒng)自動(dòng)識(shí)別方法研究

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關(guān)鍵詞：統(tǒng)計(jì)能量分析；模態(tài)能量；子系統(tǒng)識(shí)別；層次聚類(lèi)分析；本征正交分解 中圖分類(lèi)號(hào)：0321 文獻(xiàn)標(biāo)志碼：A DOI：10.16385/j.cnki.issn.1004-4523.202306058

Automatic identification method of structural statistical energy analysis subsystem

CHEN Qiang1，2，DING Yongjun2， ZHANG Dahai12，F(xiàn)EI Qingguo1，2 （1.SchoolofMechanical Enginering，Southeast University，Nanjing 21189，China;2.KeyLaboratoryofStructureand Thermal Protection forHigh-SpeedAircraft，MinistryofEducation，Nanjing 21l189，China）

Abstract：Statisticalenergyanalysis（SEA）isawidelyusedmethodforanalyzingthehighfrequencydynamicresponseofmechani cal structurs.Thereasonabledivisionofsubsystemsisoneof tecriticalbasisesforSEA.Inthispaper，anautomaticidentification methodof SEAsubsystembasedonorderreduced modalenergydensityandhierarchicalclusteranalysis isdeveloped.First，the structuralmodalenergydensitiesinthehigh-frequencybandareobtainedthroughthediscretefiniteelementmodel.Then，themain featuresofthemodalenergiesareextractedthroughtheproperorthogonaldecomposition.Thesimilarityofthemodalenergydensitybetweendiferentelementsisanalyzdbyhierarchicalclusteranalysis.Finall，thenumberofstatisticaleergyanalysisubsy temsandthecorespondingstructuralelementsareidentified.TheTshapedplates，Ishaped plates，ndenginecombustioncham beraretaken as simulationmodels toverifytheefectiveness of theproposed method.Simulationresults show thatthecouplingre lationshipbetweencomponents，thenumberofsubsystems，andcorespondingelementscanbeautomaticallyidentifiedbyhepro posed method.Then，the SEA model can be established efciently and accurately.

Keywords：statisticalenergyanalysis（SEA）；modalenergy；subsystemidentification；hierarchicalclusteranalysis；proper orthogonal decomposition

運(yùn)載火箭、航空發(fā)動(dòng)機(jī)、高速列車(chē)等機(jī)械裝備在服役過(guò)程中承受高頻振動(dòng)載荷[1-4]，會(huì)導(dǎo)致結(jié)構(gòu)產(chǎn)生強(qiáng)烈的高頻振動(dòng)響應(yīng)，嚴(yán)重影響結(jié)構(gòu)功能性和安全性。（剩余12521字）