Q/SZJ191001-2017輪胎不平衡振動(dòng)分析規(guī)范SpecificationOfImbalanceVibrateAnalysisTire20XX20XX-12-31實(shí)施20XX-11-27發(fā)布XXXX汽車(chē)工程技術(shù)有限公司發(fā)布Q/SZXX-X-2017輪胎不平衡振動(dòng)分析規(guī)范范圍本標(biāo)準(zhǔn)規(guī)定了輪胎不平衡振動(dòng)分析方法及結(jié)果處理方法。本標(biāo)準(zhǔn)適用于CAE部門(mén)輪胎不平衡振動(dòng)分析。規(guī)范性引用文件無(wú)。術(shù)語(yǔ)和定義無(wú)。摘要ABSTRACT本規(guī)范描述了如何評(píng)估整車(chē)輪胎靜/動(dòng)不平衡，因輪胎質(zhì)量分布不均導(dǎo)致的輪胎不平衡是汽車(chē)行駛時(shí)的一個(gè)主要振動(dòng)源。它是由輪胎的轉(zhuǎn)動(dòng)速度相關(guān)的具有周期性特點(diǎn)的轉(zhuǎn)動(dòng)向心力引起的。這個(gè)力相對(duì)與輪心會(huì)產(chǎn)生周期性的力矩，輪子的力和力矩會(huì)傳到相鄰的結(jié)構(gòu)上，如果輪子的力相互抵消的話(huà)只會(huì)傳遞力矩至相鄰的結(jié)構(gòu)中。這會(huì)產(chǎn)生兩種不平衡的類(lèi)型:力和力矩均傳遞的為輪胎靜不平衡，只傳遞力矩的為輪胎動(dòng)不平衡。Thisproceduredescribeshowtoassessthevehiclesensitivityforstaticanddynamictireimbalance.Oneofthesourcesofvibrationinamovingvehicleisduetotire-wheelimbalance,whichiscausedbythenon-uniformmassdistributioninthetire-wheelsystem.Asatirespinsacentrifugalforce,harmonicintimeandproportionaltothesquareoftherotationalvelocity,isgenerated.Thisforceproceduresharmonicmomentsaboutthewheelspindle.Bothforcesandmomentsfromeachtire-wheelsystemaretransferredtoadjoiningstructureunlesstheforcescanceloutinwhicheventonlythemomentsaretransferred.Thisleadstotwotypesofimbalancesinvehiclesystems;staticimbalance,whereforcesandmomentsaretransferred,anddynamicimbalancewhereonlymomentsaretransferred.流程圖ProcessFlowDiagram計(jì)算出力和力矩等數(shù)據(jù)計(jì)算出力和力矩等數(shù)據(jù)Calculatetheforceandmoment用Sol111進(jìn)行計(jì)算RunthemodelwithSOL111收集有限元模型信息Collectdetailfiniteelementmodel繪制曲線(xiàn)Plotcurve單位轉(zhuǎn)化Scaletheresponseby1000*(2PI)^2/gtoexpressitintermsofmg/ozunit圖1流程圖Fig1ProcessFlowDiagram工具描述ToolDescription仿真分析過(guò)程中需要用到的如下軟件:Thefollowingsoftwarefacilitatestheanalyticalsimulationprocess:前處理(Preprocessors):Hypermesh求解器(AnalysisCode):MSC.Nastran后處理(Postprocessors):Hyperview建模和分析過(guò)程Modeling/AnalysisProcedure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(zhǎng)度(Length) 毫米(mm)時(shí)間(Time) 秒(Second)內(nèi)容Contents圖2整車(chē)組成示意圖坐標(biāo)系CoordinateSystems整車(chē)全局坐標(biāo)系。Vehicleglobalcoordinatesystem.建模技巧ModelingTechniques參照整車(chē)NVH建模規(guī)范AccordingtothespecificationofvehiclemodelforNVH假設(shè)和限制Assumptions/Limitations假設(shè)系統(tǒng)響應(yīng)是線(xiàn)性的，輪胎旋轉(zhuǎn)產(chǎn)生正弦，溫度的影響忽略。剛度與阻尼成正比。Itisassumedthatthesystemrespondsinalinearelasticmanner.Non-uniformityisassumedtobesinusoidal,andphasedwithrespecttoroadwheel/tirerotation.Temperatureeffectsonbushingratesanddampingareoftenignored.Forlinearmodels,stiffnessratesanddampingasafunction.載荷和邊界條件Loads/BoundaryConditions頻響分析，求解序列號(hào)Sol111。FRFSolutionSol111分析工況分析工況示意圖如圖2所示。figure1,isthesketchforloadcase靜不平衡動(dòng)不平衡圖2分析工況示意圖分析包含以下4個(gè)工況：Theanalysiscontains4casesasfollowing:左前輪靜不平衡（Fx，F(xiàn)z，Mx，Mz）Thestaticimbalanceforleftfronttire;左后輪靜不平衡（Fx，F(xiàn)z，Mx，Mz）Thestaticimbalanceforleftreartire;左前輪動(dòng)不平衡（Mx，Mz）Thedynamicimbalanceforleftfronttire;左后輪動(dòng)不平衡（Mx，Mz）Thedynamicimbalanceforleftreartire;加載位置加載點(diǎn)為輪心，如圖3所示。Theloadcontains3types圖3加載點(diǎn)位置載荷大小/load載荷大小分析包含以下2種情況：1）對(duì)于力不平衡工況，每個(gè)車(chē)輪的不平衡力為：式中：——車(chē)輪不平衡量，單位；——車(chē)輪轉(zhuǎn)動(dòng)頻率；——車(chē)輪寬度，單位mm；若左右同相位則左右輪不平衡力相位差為0，若反相位則相位差為180°，取車(chē)輪產(chǎn)品開(kāi)發(fā)技術(shù)要求中規(guī)定的不平衡量最大允許值，例如某車(chē)型17寸車(chē)輪的不平衡量最大允許值為650不平衡力在X向與Z向的分量為：式中：——車(chē)輪轉(zhuǎn)角，Z方向的不平衡力滯后X方向90°。2）對(duì)于力矩不平衡工況，每個(gè)車(chē)輪的不平衡力矩為：若左右同相位則相位差為180°，若左右反相位則相位差為0。不平衡力矩在繞X向與繞Z向的分量為：式中：——車(chē)輪轉(zhuǎn)角，繞Z方向的不平衡力矩滯后繞X方向90°。靜不平衡的工況的不平衡力和力矩分別如下：其中L——加載點(diǎn)與不平衡質(zhì)量在輪軸上投影點(diǎn)的距離。ω——圓頻率動(dòng)不平衡的力矩計(jì)算公式如下：加載頻率Frequency車(chē)輪轉(zhuǎn)動(dòng)頻率與車(chē)速（km/h）的對(duì)應(yīng)關(guān)系如下：式中：——輪胎滾動(dòng)半徑，單位mm。由上式可得出最高車(chē)速對(duì)應(yīng)的車(chē)輪轉(zhuǎn)動(dòng)頻率。加載頻率設(shè)置如下：激勵(lì)頻率范圍：1至；模態(tài)求解范圍：1至。結(jié)果Results《整車(chē)動(dòng)不平衡測(cè)試規(guī)范》《Thespecificationofmodaltestforfullvehicle》性能要求PerformanceRequirements座椅導(dǎo)軌處各個(gè)方向的加速度輸出小于30mG/oz（在0~最大車(chē)速范圍內(nèi)）方向盤(pán)處各個(gè)方向的加速度輸出小于60mG/oz（在0~最大車(chē)速范圍內(nèi)）TheaccelerationofXYZdirectionforseattrackerisbelow30mG/oz（rangeofmaxvelocity）TheaccelerationofXYZdirectionforsteeringisbelow60mG/oz（rangeofmaxvelocity）分析要求ANALYSISREQUIREMENTS無(wú)。參考文件DOCUMENTATION無(wú)。聯(lián)系人CONTACTS無(wú)。例子EXAMPLESDOMAINSOLVERACMS(PARTOPT=DOF,PRINT=YES)CEND$CASECONTROLSECTIONECHO=NONETITLE=A10TIREWHEELIMBALANCEANALYSISMETHOD=1MPC=1000FREQ=10SDAMPING(STRUCTURE)=2VELOCITY(SORT2,PUNCH,PHASE)=1ACCELERATION(SORT2,PUNCH,PHASE)=1SET1=27750006,27750012,27750003,27750009,50004102$$$SUBCASE101LABEL=STATICIMBALANCE,FRONTTIRE,LEFTHANDSIDEDLOAD=1101SUBCASE102LABEL=STATICIMBALANCE,REARTIRE,LEFTHANDSIDEDLOAD=1102SUBCASE103LABEL=DYNAMICIMBALANCE,FRONTTIRE,LEFTHANDSIDEDLOAD=1103SUBCASE104LABEL=DYNAMICIMBALANCE,REARTIRE,LEFTHANDSIDEDLOAD=1104$$BEGINBULKPARAMPOST-1PARAMAUTOSPCYESPARAMCOUPMASS1PARAMGRDPNT0PARAM,CHECKEL,noMPCADD100016000000160050001650000017000000170050002200500022105000240050002410500027000000270050002725000016505000$==============================================================================$$***EIGENVALUEEXTRACTION$EIGRLSIDLO_FREQUP_FREQNROOTSMSGLVLMAXSETEIGRL10.040.1$=======================================$IMBALANCEFORCEANDMOMENTCALCULATION$=======================================$***TABLED4=W^2=(2*PI*FREQ)^2=39.478*FREQ^2TABLED41000.01.00.0100.0+0.00.039.478ENDT$123456789$***STATICIMBALANCE,FRONTTIRE,LEFTHANDSIDEDLOAD11011.01.01011.01021.0103++1.0104$$***FRONTTIRE,LEFTHANDSIDE$***FxRLOAD2101101101100DAREA1012200000016.12e-3DPHASE10122000000190.$***FzRLOAD2102102102100DAREA1022200000036.12e-3DPHASE1022200000030.$***MxRLOAD2103103103100DAREA1032200000044.280e-1DPHASE1032200000040.$***MzRLOAD2104104104100DAREA1042200000064.280e-1DPHASE10422000000690.$***STATICIMBALANCE,REARTIRE,LEFTHANDSIDEDLOAD11021.01.01051.01061.0107++1.0108$***REARTIRE,LEFTHANDSIDE$***FxRLOAD2105105105100DAREA1052400000016.12e-3DPHASE10524000000190.$***FzRLOAD2106106106100DAREA1062400000036.12e-3DPHASE1062400000030.$***MxRLOAD2107107107100DAREA1072400000044.280e-1DPHASE1072400000040.$***MzRLOAD2108108108100DAREA1082400000064.280e-1DPHASE10824000000690.$$$***DYNAMICIMBALANCE,FRONTTIRE,LEFTHANDSIDEDLOAD11031.01.01091.0110$$***MxRLOAD2109109109100DAREA1092200000041.38000DPHASE1092200000040.$***MzRLOAD2110110110100DAREA1102200000061.38000DPHASE11022000000690.$***DYNAMICIMBALANCE,REARTIRE,LEFTHANDSIDEDLOAD11041.01.01111.0112$***MxRLOAD2111111111100DAREA1112400000041.38000DPHASE1112400000040.$***MzRLOAD2