Q/SZJ191001-2017內(nèi)飾車身模態(tài)分析規(guī)范SpecificationOfModalAnalysisForTrimmedBody20XX20XX-09-30實(shí)施20XX-08-28發(fā)布XXXX汽車工程技術(shù)有限公司發(fā)布Q/SZXX-X-2017內(nèi)飾車身模態(tài)分析規(guī)范范圍本標(biāo)準(zhǔn)規(guī)定了術(shù)語和定義、內(nèi)飾車身模態(tài)分析方法及結(jié)果處理方法。本標(biāo)準(zhǔn)適用于CAE部門的內(nèi)飾車身模態(tài)分析。規(guī)范性引用文件無。術(shù)語和定義無。摘要Abstract本規(guī)范規(guī)定了內(nèi)飾車身模型搭建要求和模態(tài)評價(jià)標(biāo)準(zhǔn)。ThisspecificationdefinestherequirementsofTrimmedBodymodelbuildingandmodalEvaluationstandard.

流程圖ProcessFlowDiagram收集詳細(xì)模型(TrimmedBody)收集詳細(xì)模型(TrimmedBody)CollectDetailedModal(TrimmedBody)設(shè)置邊界條件SettheboundaryConstraints提交計(jì)算NastranSOL103RunNastranSOL103輸出位移和動畫振型OutputDisplacementsandAnimateModeShapes優(yōu)化Optimization結(jié)果是否滿足要求？IstheresultOK？評價(jià)標(biāo)準(zhǔn)Evaluationstandard結(jié)束EndNo圖1流程圖Fig1ProcessFlowDiagram工具描述ToolDescription仿真分析過程中需要用到的如下軟件:Thefollowingsoftwarefacilitatestheanalyticalsimulationprocess:前處理(Preprocessors):Hypermesh求解器(AnalysisCode):MSC.Nastran或OptiStruct后處理(Postprocessors):Hyperview建模和分析過程Modeling/AnalysisProcedure所有的模型必須符合NVH建模標(biāo)準(zhǔn)，以及符合噪聲和振動分析的建模文檔。AllmodelsmustconformtotheNVHmodelingstandardsasoutlinedaswellastheindividualcomponentmodelingdocumentsasapprovedbytheNoiseandVibrationFocusGroup.單位Units分析中所用單位制如下所示:Theunitsusedintheanalysisareasfollows:力(Force) 牛頓(N)質(zhì)量(Mass) 噸(Ton)長度(Length) 毫米(mm)時(shí)間(Time) 秒(Second)內(nèi)容ContentsTrimmedbody包含所有重要的質(zhì)量。Trimmedbody應(yīng)包含：白車身、發(fā)動機(jī)罩、行李箱、擋板、地毯、頂蓋內(nèi)飾板、散熱器總成、制動助力器、電池、備胎、座椅、阻尼器、安全帶、轉(zhuǎn)向管柱、洗滌液瓶、雨刷、ABS控制器的、計(jì)算機(jī)模塊、非結(jié)構(gòu)車身、門等。任何重要的質(zhì)量都必須包括在內(nèi)。每個(gè)內(nèi)飾部分的質(zhì)量，以及搭建的總質(zhì)量必須與實(shí)際內(nèi)飾車身質(zhì)量相匹配。Thetrimmedbodyshouldcontainallofthesignificanttrimmedmasses.Thetrimmedbodyshouldcontain:Bip,Hood,decklid,tailgate,carpet,headliner,radiatorassembly,brakebooster,battery,sparetire,seats,bakeondampers,seatbelts,steeringcolumn,washerbottle,windshieldwipers,ABScontroller,computermodules,nonstructuralbodypanels,doorsandetc.Anysignificantconcentratedordistributedmassesmustbeincluded.Themassofeachtrimpart,aswellasthetotalmassofthetrimbodymustmatchtheactualmassofthetrimmedbody.坐標(biāo)系CoordinateSystems分析采用整車坐標(biāo)系，有些彈簧需要建局部坐標(biāo)系。Analysisusevehicleglobalcoordinatesystem,andlocalcoordinatesystemsareneededforsomespringsinthetrimmedbody.建模技巧ModelingTechniques請參閱TrimmedBody建模指南。RefertotheTrimmedBodymodelingguidelines假設(shè)和限制Assumptions/Limitations無。載荷和邊界條件Loads/BoundaryConditions約束：自由狀態(tài)Noconstraints.加載：無。Loads：N/A結(jié)果Results輸出位移及振型云圖OutputDisplacementsandModeShapes.性能要求PerformanceRequirements模態(tài)結(jié)果判斷依據(jù)：主要模態(tài)之間避頻大于2Hz，且主要模態(tài)避開發(fā)動機(jī)怠速頻率；呼吸模態(tài)與聲腔模態(tài)避開；轉(zhuǎn)向系統(tǒng)垂向模態(tài)與一階彎曲模態(tài)避開；一階彎曲與一階扭轉(zhuǎn)模態(tài)避開；發(fā)動機(jī)艙與發(fā)動機(jī)怠速頻率避開。Thegapbetweenthemainmodalfrequencymustbegreaterthan2Hz,andthemainmodemustbediversefromengineidlefrequency;breathingmodemustbedifferentfromacousticmode;theverticalmodeofsteeringsystemanditsfirstbendingmodemustbedifferent;first-orderbendingmustdifferfromthefirsttorsionalm