基于FE-SEA混合法的铝型材振动声辐射特性预测.pdf

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1、第35卷第3期噪声与振动控制、bl35No．32015年6月NOISEANDVIBRLTIONCoNTROLJun．2015文章编号：1006-1355(2015)03—0033．04+107基于FE—SEA混合法的铝型材振动声辐射特性预测吴健，肖新标，张玉梅，圣小珍(1．西南交通大学牵引动力国家重点实验室，成都61003l；2．西南交通大学材料先进技术教育部重点实验室，成都610031)摘要：基于FE．SEA混合法建立高速列车车体铝型材振动声辐射预测模型，并与FE．BEM模型的预测结果进行对比分析，验证模型的有效性，进而运用该模型分析黏弹性阻尼减振降噪技术对于抑制铝型材振动声辐射的

2、效果。结果表明：在型材顶板、底板以及型材内表面敷设黏弹性阻尼可明显抑制500Hz以上中高频频段的振动声辐射。在型材表面敷设黏弹性阻尼时，型材声辐射效率变化不大，型材振动被抑制导致其向半空间辐射声功率降低。对比顶板和型材内表面阻尼敷设形式，在型材底板敷设阻尼具有较高的经济性，更加有利于实现车体的轻量化设计。相关结果可为高速列车车体铝型材的减振降噪设计提供理论参考。关键词：振动与波；高速列车；中空铝型材；振动声辐射；FE．SEA混合法中图分类号：U270．1文献标识码：ADOI编码：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近年来我