6（4）某8.5L柴油機扭振計算報告.docx

1、編號:某8.5L機型型柴油發(fā)動機扭振計算分析報告產(chǎn)品名稱：扭振減振器供應(yīng)商：編 制：韓同群審 核：批 準：時 間:某8.5L機型柴油發(fā)動機扭振計算分析報告一、模型建立1、發(fā)動機基本參數(shù)圖1發(fā)動機基本參數(shù)2、用AVL軟件建立模型Rston6*002Pision3P«sion4PistonsPtUonPinRJoint?P-Pr6P-RniP-PW12PE3PRMP-Pn5SmaiEndiXHnt2JointsJ0IM4ConrodiConrooa.Conr(xJ3IConrocMConrodiCcanicshanMaineeag7M»nBcanngl,)JointlO2 )

2、JointOEngine圖2 AVL軟件模型Deaifner_Set_l. Case_l3、發(fā)動機扭振當量模型Project: DesitnexOcancl odel： 8511Torsional System圖3發(fā)動機曲軸當量模型4、發(fā)動機氣缸壓力曲線700rpm800rpn>900rpm1000rp«UOOrpa1200rp«1300rp«1400rpa1500rpa1600rpa1700rp«1800rr«1900rp«圖4氣缸壓力曲線5、曲軸以及減振器模型圖5曲軸及減振器模型二、計算結(jié)果1、扭振計算結(jié)果圖6無阻尼自由振動

3、模態(tài)Damped Mcxles (real)o12M8H2 (->碗，740 4MX (->圖4有阻尼振動模態(tài)XDsp Synthess (deg)、X00080010001200140010001800engine speed (rpm)70543210 o o o o o O(6豈 S-S8UCAS dsQ圖5各轉(zhuǎn)速下合成扭振角Layer 1COO80010001200140010001800engine speed (rpm)圖5主頻率下(3, 4.5, 6階)各扭振角Project:Designex_Set_l.Case_lodd： 85110 010 020 030 04

4、0 050 0C 0 070 08time (s)a)Damped torsional mode 2: 295.1Hztrace (-) envelope* (-) ， ctivctopc- ()0 0020 004 oooe 0 0080 0100120 0140 0100 018time (s)b)Desitnex_Set_l. Case_lDamped torsional mode 3: 747.3Hz2 0 2 4 o 09 sOE0 0010 0030 004time (s)0 005， trsc () envelope* (-) envelope- ()oooe0 007c)圖6

5、a) b) c)前三階有阻尼振動模態(tài)2、臨界轉(zhuǎn)速圖7臨界轉(zhuǎn)速3、散熱分析圖8各轉(zhuǎn)速下的功率消耗Designer_Set_l. Case_lProject: Designerocangllodel:8511Dissipated Power and Equivalent DampingDissipated Power403S3025201&105(M)a)若d pged一ss_peoo 800100012001400engine speed (rpm)DampenWeb5oeyment iHalf.MainJoumall Web7Web1Web8Web2Web9Web3Web4Web10W

6、eb 11ieoo 1800Web12Half_MainJoumar7Segment2圖9各扭振節(jié)點耗散功率3、1700rpm時的角度波動以, g 、K /RO 口 A 'Report Resuts | Tenyxates | Operaoons |,Load * XliocMSe*X |Defaui (CrankAnie)/，Mean Oyn Slfe» fMw Dyn Stress *Max Total Stress f Dyn Torque MeanDyn Torque Dyn Torque Stale Torque *-Max Total Torque Dyn Den

7、xmaton Anpi Mean Oyn DHoanabon 七 Max Dyn Deformation r Max Tool Detormaton ，Osspated Power fii Torque Harmonics ，.ta 1200 rpm g>1700rpm、Torque Sywlhcsts » Stress Synmesis tt 700 rpm(oseoseboo圖10 1700rpm時的角度波動3、橡膠減振器參數(shù)S Vibration DamperGeneraliVibration Damper / GeneralCancel | .F HubF Ring 1

8、 Non-structural MassesDamper Type | Rubber DamperNumber of Rings 12與 TVDamper (25) - Properties1 Vibration Damper General F B2E F Ring 1Vibration Damper / HubMass廠 Defined by GeometryMoment of Inertia |64726kg mm*2DampingAbsolute Damping pN m s/rada lllI Vibration Damper 以 General F HubF RinglVibrat

9、ion Damper / RingCancel |Moment of Inertia 57033Absolute Damping |98 856Torsional Stiffness |85974 656kg mm*2Nm s/radN m/radDamping Constant98 856N m s/radProportional Darnping CoeffLoss Factor圖11橡膠減振器模型及參數(shù)結(jié)論通過計算，建議采用03OOX45mm（自定）規(guī)格的減振器方案，自振頻率 采用295kHz,其主階次最大扭振振幅0.2°。ISL9.5I-機型主盼次計n結(jié)果 （3、 4.5、 6盼）（另一個發(fā)動機發(fā)動機的,供參考，用此報告時刪掉）衡量這種橡膠扭轉(zhuǎn)減振器的性能的主要指標有：滑移轉(zhuǎn)矩（發(fā)動機輸 至橡膠扭轉(zhuǎn)減振器的扭矩，當扭轉(zhuǎn)減振器的輪轂與橡膠圈發(fā)