第43卷第1期Vol.43,No.12024年1月JournalofAppliedAcousticsJanuary,2024⋄研究报告⋄某乘用车加速工况车内轰鸣声诊断分析及控制方法蒋邹1梁莹2吴文栋1罗玉军3†(1柳州铠玥科技有限公司柳州545006)(2上汽通用五菱汽车股份有限公司柳州545006)(3广西科技大学柳州545006)摘要：该文针对某乘用车加速工况出现的轰鸣声进行诊断分析与控制。首先通过主观评价确定问题工况，通过实车测试发现2400r/min左右车内存在明显轰鸣声。利用阶次分析、模态分析及错频验证可知，发动机激励经悬置传递副车架，引起副车架的共振，进而传递到车内引起轰鸣声。最后通过传递分析及柔性连接点导纳法，优化副车架橡胶衬套结构。结果表明，优化后在2400r/min声压总级与2阶声压差值为7.5dB(A)；声压总级较原状态降低2dB(A)，2阶噪声降低7.8dB(A)，声压总级和2阶噪声声压差值增大，轰鸣声明显减小，主观评价可接受。关键词：轰鸣声；模态分析；传递路径分析；副车架衬套优化中图法分类号:U461.4;TB53文献标识码:A文章编号:1000-310X(2024)01-0090-05DOI:10.11684/j.issn.1000-310X.2024.01.011Diagnosisanalysisandcontrolmethodofboomingnoiseincar’spassengerJIANGZou1LIANGYing2WUWendong1LUOYujun3(1LiuzhouKaiyueTechnologyCo.,Ltd.,Liuzhou545006,China)(2SAICGMWulingAutomobileCo.,Ltd.,Liuzhou545006,China)(3GuangxiUniversityofScienceandTechnology,Liuzhou545006,China)Abstract:Inthispaper,diagnosis,analysisandcontroloftheroarofapassengercarunderaccelerationconditionsarecarriedout.Firstofall,theproblemconditionsaredeterminedthroughsubjectiveevaluation,andthroughtherealvehicletest,itisfoundthatthereisobviousroaringnoiseinthecararound2400r/min.Usingorderanalysis,modalanalysisandfrequency-staggeredverification,itcanbeseenthattheengineexcitationistransmittedtothesub-framethroughthesuspension,causingtheresonanceofthesub-frame,whichisthentransmittedtotheinteriorofthevehicletocausearoaringsound.Finally,thesubframerubberbushingstructureisoptimizedbytransferanalysisandflexibleconnectionpointadmittancemethod.Theresultsshowthatafteroptimization,thedifferencebetweentheoveralllevelat2400r/minandthesecond-ordersoundpressureis7.5dB(A);Theoveralllevelandthesecondordernoisesoundpressureincrease,andt...
