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1、第35卷第3期噪聲與振動控制、bl35No．32015年6月NOISEANDVIBRLTIONCoNTROLJun．2015文章編號：1006-1355(2015)03—0033．04+107基于FE—SEA混合法的鋁型材振動聲輻射特性預(yù)測吳健，肖新標，張玉梅，圣小珍(1．西南交通大學牽引動力國家重點實驗室，成都61003l；2．西南交通大學材料先進技術(shù)教育部重點實驗室，成都610031)摘要：基于FE．SEA混合法建立高速列車車體鋁型材振動聲輻射預(yù)測模型，并與FE．BEM模型的預(yù)測結(jié)果進行對比分析，驗證模型的有效性，進而運用該模型分析黏彈性阻尼減振降噪技術(shù)對于抑制鋁型材振動聲輻射的
2、效果。結(jié)果表明：在型材頂板、底板以及型材內(nèi)表面敷設(shè)黏彈性阻尼可明顯抑制500Hz以上中高頻頻段的振動聲輻射。在型材表面敷設(shè)黏彈性阻尼時，型材聲輻射效率變化不大，型材振動被抑制導致其向半空間輻射聲功率降低。對比頂板和型材內(nèi)表面阻尼敷設(shè)形式，在型材底板敷設(shè)阻尼具有較高的經(jīng)濟性，更加有利于實現(xiàn)車體的輕量化設(shè)計。相關(guān)結(jié)果可為高速列車車體鋁型材的減振降噪設(shè)計提供理論參考。關(guān)鍵詞：振動與波；高速列車；中空鋁型材；振動聲輻射；FE．SEA混合法中圖分類號：U270．1文獻標識碼：ADOI編碼：10．39698．issn．1006'1335．2015．03．008SoundRadiationPred
3、ictionandControlofSectionAluminumofHigh-speedTrain’SCar-bodyBased0nHybridFE-SEAMeth0dWUJian2．ⅪA0xin—biaoI．ZHANG．meiI．SHENGXicIo-zhen(1．StateKeyLaboratoryofTractionPower,SouthwestJiaotongUniversity,Chengdu61003l，China；2．KeyLaboratoryofAdvancedTechnologiesofMaterials，MinistryofEducation，Southwest
4、JiaotongUniversity,Chengdu610031，China)Abstract：ThehybridFE-SEAmodelwasdevelopedtopredictthesoundradiationofsectionaluminumofhigh-speedtrain’Scar-body．ThemodelwasverifiedthroughthecomparisonoftheresultswimthosecalculatedbyusingtheFE-BEMmode1．Theefectoftheviscoelasticdampingtechniqueonthesoundra
5、diationsuppressionwasanalyzedwitl1thismode1．ThepredictionresultsshowthatthesoundradiationofthesectionaluminumwithviscoelasticdampingmaterialattachedtothetopandthebotomandtheinnersurfaceofthesectionaluminumCansignificantlysuppressthesoundradiationinthemedium—and-highfrequencyrangeabove500Hz．Whil
6、etheacousticradiationeficiencydoesnotchangealotiftheviscoelasticdampingmaterialisatachedtotheoutersurfaceofthesectionaluminum．Comparingthetypesoftheviscoelasticdampingmaterialatachment，itisconcludedthattheviscoelasticdampingmaterialatachedtothebotomismoreeconomicandfeasible．Itisbeneficialforthe
7、lightcar-bodydesign．Thisworkmayprovideatheoreticalguidanceforthedesignofthesectionaluminumfornoiseandvibrationreductionofthecar-bodies．Keywords：vibrationandwave；high-speedtrain；hollowsectionaluminum；soundradiation；hybridFE-SEA近年來我
