X343-流體滲透壓力分析

1、 CopyrightAN SYS教學算例集流體壓力分析撰寫：孟志華審核：校對：2018年09月30日ANSYS關(guān)鍵字：流體滲透壓力、插入命令、2D軸對稱、摩擦接觸算例來源：Mechanical_Adx-anced_Coimections 教程案例目錄1. 摘要12. 案例描述13. 操作步驟33.1. 啟動ANSYS Workbench,打開已有的分析文件33.2. 查看材料定義43.3. 啟動靜力分析流程，進入Mechanical界面查看設(shè)置53.4. 插入APDL命令設(shè)置流體壓力73.5. 分析結(jié)果查看164. 分析小結(jié)20IANSYS1-摘要本算例在Mechanical界面通過插入命令的

2、方式來施加流體壓力載荷，計算了氣 缸運動中，密封圈與氣缸和活塞之間的摩擦接觸，以及O型圈在流體壓力施加前后 的滲透結(jié)果對比，該分析涉及到的要點包括：兒何非線性（大變形）、材料非線性 （橡膠Neo-Hookean模型）、接觸非線性（摩擦接觸）、插入命令在接觸面上施加流 體壓力以及采用命令方式查看流體滲透壓力。本例針對裝配體的非線性接觸以及流體壓力的施加以及滲透壓力結(jié)果的查看具 有借鑒和指導作用。2. 案例描述本案例模型有三個parts：活塞、氣缸和密封圈，活塞不動，通過氣缸運動來模 擬裝配過程，并通過流體壓力的施加，來模擬流體滲透壓力對裝配體的影響。活塞和氣缸材料為ANSYS材料庫中默認提供的鋼

3、材料，彈性模量為2.1 X 10e5 MPa,泊松比為0.3,密度是7.85X10e-9Vnmi3； O型密封圈材料為橡膠材料，釆 用Neo-Hookean模型，初始剪切模量為20MPa,不可壓縮參數(shù)D1為0.015MPaA-lo活塞設(shè)置為固定，氣缸底部施加10mm位移，分為3個載荷步進行運算，第一 個載荷步通過在接觸對中定義pinball來調(diào)節(jié)活塞與密封圈之間的干擾，第二個載荷 步滑動氣缸，與活塞和O型圈接觸，系統(tǒng)密封，第三個載荷步通過插入命令的方式 對O型圈施加流體壓力載荷。18A: O Ring general elastomerStatic StructuralTime: 1 $A F

4、ixed Support 可 DisplacementOutlineCommandsFilter: Name| Z (1 t) I 丿二Static Structural (A5) Analysis Settings fixed Support Disol&Hmectf屋 . E v e| Solution (A6) t v3j Solution Information “ Total Deformation Equivalent Stresscxasel, srpressure esln# s,I eselr rrtypecid_lsGr allr1,presr,SOCommands (AP

5、DL)cxasel, s, starvpt eslnl.r匸ype_ Cd_l. allr2rpresrrlallselFileFile NameDAnsysFilesWS5a-pressure.inpFile StatusObject changedDefinitionDetails of Commands (APDL)SuppressedStep Selection Mode (step ZumberTargetNo卜 By Number3Mechanical APDL3. 操作步驟3.1.啟動ANSYS Workbench ,打開已有的分析文件(1)首先啟動ANSYS Workbench

6、環(huán)境。在File下拉菜單點擊R己stowAi-chive,打開分析文件壓縮包“WS5apressure.vbpz”，然后保存為WS5a- pressure.wbpj”文件。A Unsaved Project Workbench并aNewOpen.SoveSave AsCtrl 禰ChipCtrlfSSave to Repository Oxn from Repository Send Changes to Rcostory Get Changes from Repository Transfer to Repository Status Manaoe Reptcry Prqec: Manspe

7、 Corrcctcrs Launch B a oProjectImport. | Reconnect Refresh Project / Update Project | S2 ACT Start PageToolboxProject Schematic日 Analysis Systems 的 Design Assessment Eigenvalue Buckling 巒 Explicit Dynamics Fluid Flow - Blow Molding (Polyflow) Fluid Flow - Extrusion (Polyflow) Fluid Flow (CFX)O Fluid

8、 Flow (Fluent) Fluid Flow (Polyflow)EQ Harmonic Acoustics 直 Harmonic ResponseO Modal網(wǎng) Modal Acoustics 她I Random Vibration IO Response Spectrum 因 Rigid Dynamics32查看材料定義（1）確定U前處于Workbench的起始界面Project,即“主頁”。（2）雙擊打開流程中的Engineering Data項，打開材料數(shù)據(jù)界面。/ WS5a-pressure - WorkbenchFile /iew Tools Units Extension

9、s lbs Help回畫團團/EB Project、Import. | v Recaineit Refresh Project / Update Project 55 ACT Start PageTcoboxProject Schematic日 Analysis Systems 匕 Design Assessment 謝 Eigenvalue Buckling 他 Explicit Dynamics Fluid Flow Blow Molding (Polyfiovv) Fluid Flow - Extrusion (Polyflow) Fluid Flow (CFX) Fluid Flow

10、(Fluent) Fluid Flow (Polyflow) Q Harmonic Acoustics Harmonic ResponseIB Modal 回 Modal Acoustics 哋 Random VibrationA1八Static Structural (AJEYS)2傅Ergnecrinc Data3Geometry4 Model5淘Setup .6侖Sdution7 0ResultsORing - general elastomer（3）查看定義好的結(jié)構(gòu)剛與橡膠材料屬性。18O-ire cA2; Lngneenno DataD 9 XiContents 0* 7Source

11、23 elfletoner HE斗$ Structirdswd迥 D: fr&jamtncW JiOAddfYsrreennpotaiarun -u5arrple5V3erefaiJaCW here to W o nr* mtenIRoperBes ofOutfc-e Rom 3: etastnnerA9CDE1Ttyvatic葉fjf2-e)3Inrt)d Shear MxtLe Mj20ri4IixOTixestinr Pf aneter DI0.01533.啟動靜力分析流程f進入Mechanical界面查看設(shè)置（1）確定U前處于Workbench的起始界面【Project,即“主頁”。（

12、2）打開ANSYS Mechanical模塊：找到項U流程【Project Schematic】窗口下的B項目（靜力分析過程），雙擊其中的【Model欄目，即打開ANSYSMechanical模塊的界面。A1藝 Static Structural (ANSYS)2 Engineering Data5/3側(cè) Geometry丿.p夠 ModelJ ,5淘 SetupJ ,6SolutionJ z7矽 ResultsY ,O-Ring general elastomer(3) 修改 mechanical 的單位系統(tǒng)為 Metric (nini.kg,N,s,mV,niA)o() A : 0-R.i

13、ng general elastomer Mechanical ANSYS Mechani0 Show VerticesSize *Lo 哲 0n$S 丿重I ContactsFrictional O ring To CylinderA Frictional - O-ring To Piston Frictional Oring To Cylinder0、如 Mesh 甩ce Siring 應(yīng) Face Swig 2 &醱 Face Sang 3S Q Static Structural (A5)Anal yss SettingsFrcnonal - O-rng To Piston | Fro

14、nal To CylinderDetails of Multiple Selection183.4.插入APDL命令設(shè)置流體壓力（1）在O型圈與活塞Piston的摩擦接觸中插入命令conmiandsB- Connections d*會 ContactsL -vX BGonal 0Create.Mesh 丿製 Face Sizing:衛(wèi).Face StzrxJ 2：Face Sizrxj 3 0 yQ Static Structural (A5： Aniyss SettingsInsert SuppressDisable Transparency9 Hide All Other Bodies目

15、Flip Contact/TargetDetails of *Frict!onal - O-ring To Pi 朗 Search Connections for Duplicate Pairs 口 Save Contact Region Settings , 3 Load Contact Region Settings Rh* tn DefaultScope Scoping MethodContact2 Ed拿 Spring 二 Bearing Beam局Earn直 Connection Group 敢 Manual Contact Region X Spot Weld（2）點擊comman

16、ds,在命令窗口輸入：cidl=cid,它將保存接觸單元類型號到 cid_l的參數(shù)名中，后續(xù)將使用。OutlineQ Com也V 3回計3 Si Model (M)E Gemetry *幻0啲$ 朝 CHnder Cfdl to 5 pazan*tr txdM.andnuaber for the asyxmecric ccqkcc pair is e(iual to the paraceter cid.nd xu* &uabr for th fiyEBdiric ccntxct pals (if it axistO lc qual toAcclve WIT sys?a in Workbench

17、 whn UU*vis cravd: Mevrlc in kgv N, . nfir. 2MOTE. Aay data that eequlxe* unit* (such as nat) Is sAd vo b In th* consistent aolv $ Solving Unit* in th* help syts foz Dor mfozmation.odlod（3）點擊兒何窗口標簽，回到兒何界面。Outline；r0 Cylinder 由 “乂x Coordinate Systems 白 丿唸 Connectionsr1ConmardsThoTheTheThe匸yp real rea

18、lActiveNOTH:inserted into this file wi nusber for tho nuz)ber for 匸he and mat nuziber and mat numbercontact typ target typ fox he for th“丫syirwheAny daca tha requires unitsSee Solving Units in rUNIT sysrem in WorkbenuhGraphics Commands 6 MessagesNo Selection（4）創(chuàng)建Named Selectiont作為壓力載荷起始參考點，首先切換點選擇過濾

19、器， 再選中下圖中的A點，右鍵，創(chuàng)建Named Selection。在隨后出現(xiàn)的NS窗口 中輸入名稱Start_PTo(0 A: O Ring - general elastomer Mechanical ANSYSFile Edit View Units Tools Help 回 0 叫譬胃 冏|lgl ig|韻觀越 .1h Show Vertices Close Vertices 7 e-002 ：Au：o SGo To9 Hide Body (F9)9 Hide All Other Bodies20.00 Suppress BodySuppress All Other BodiesIso

20、metric ViewSetRestore Default (H)Zoom To Fit (F7)Zoom To Selection (Z)Selection NameX|Start_PTQ Image To Clipboard (Ctrl+ C)Cursor ModeView人 freatu Coordinate System Appiy selected geometryO Apply geometry items of same: See TypeLocabonXLocdbon Y;Locabon Z Apply To Conespondng Mesh NodesQ filter Tre

21、e Based On Visible BodiesOK Caned（5）切換線過濾器，選擇O型圈的下半部分線,右鍵，創(chuàng)建 named selection,命Create Named Selection (N)& Wzt Ail (Ctri+ A)名為Pwssme,后續(xù)將在此處施加流體壓力載荷。Go To2 Hide Body (F9)0 Hide All Other BodiesI Q Filter Tree Based On Visible Bodies Isometric View 今Set玄 Restore Default (H) Zoom To Fit (F7)題 Zoom To Se

22、lection (Z)fl3)Image To Clipboard (Ctrl + C)Cursor Mode20.00View0Q Look At人 Create Coordinate System31 Create Named Selection (N).曲 Select All (Ctri+ A)疲 Suppress Body屜 Suppress All Other Bodies|Pressure|XSelection NameX Apply selected geometryO Apply geometry items of same: 匚 Size匚 Type Location X匚

23、 Location Y Location Z匚 Apply To Corresponding Mesh NodesOK |Cancel（6）點擊Analysis Settings,將載荷步數(shù)修改為3,并設(shè)置笫三個載荷步的子步, 如下圖：Details of Analysis SettingsStep ControlsNumber Of Steps3Current Step Number3.Step End Time3sAuto Time SteppingOnDefine BySubstepsCarry Over Time StepOffInitial Substeps|25.Minimum S

24、ubsteps5.Maximum Substeps |1000Program ControlledSolver Type(7) 在 LI 錄樹中點擊 Static Structural,右鍵，插入 Commandso自 Named Setecbonse-Sta tic Structu尸 InsertAnalysis s &直 Rxed Stpp “色 Dispbceme .劍 Solution i 1 CrJL.4/ Solve (F5) 罰 Duplicateyj Clear Generated Data4b Rename (F2)9 w Thermal ConditionI Joint L

25、oad_1 Open Solver Files DirectoryOptionsEnvironment Temperature 21 *CGenerate Input OnlyNoJj Group All Similar ChildrenDetails of Static StructuralI- DefinitionPhysics TypeAnalysis Type耳 Fixed Support Displacement 耳 Remote Displacement 嗎 Frictionless Support 色 Compression Only Support 勺 Cylindrical

26、Support Elastic Support取 Constraint EquationJ Element Birth and DeathX Contact Step Control亀 Nodal Orientation Nodal Force 電 Nodal Pressure 萼 Nodal Displacement 趙 EM Transducer（8）點擊Commands在細節(jié)i殳置中將該命令施加到第三個載荷步，如下。B 説三I Static Structural (A5)?J蟲 Analysis Settingsi- 場 Axed SupportDisplacement臺 Command

27、s (APDL)Solution (A6)説工I Solution Information廠劭 Total Deformation才 Equi/atent Stress商二 1 Contact ToolDetails of Commands (APDL)File NameD:An sysFi lesWS5a-pressu re.inpFile StatusObject changedDefinitionNoSuppressedf Step Selection Mode By NumberI TargetMechanical APDL（9）點擊Commands,右鍵Import,找到文件WS5a

28、-pressure.inp點擊打開，既可將寫好的命令文件導入Workbench,直接在命令窗口輸入命令也可以。（采用sfe命令在O型圈下半部分施加了 50MPa的壓力，并將Startjpt點作為施加流 體壓力的起始點，APDL命令中不區(qū)分大小寫）3 -1-1 Static Structural (A5) dC Analysts Settings #色 Fixed Support s色 Dtsptocement卜扈m J&J Solution墊 Sob住 R 5i 冋 RefreshInsertExoortails of -Commands (AP Suppress/WSSapostJp2016

29、/9/18 178W$5t-pre$urt.inp |2016/9/18 1728A W55a-p*ewre.wbpz2016/9/18 17287w$5c-wear.inp2016/9/18 1728A WS5c-Wewbpz2016/9/18 1728V3廠竹開3） I文件NT）|U1 Filo ( )3駅為1NameC*1, s,In l,x,cyp*r ,cld_l!K4DIK1 selection reprwnis all nod* on lcvrof *! ! select lcMats arcACbed co nodes*only 5 eontiex lenenct with*c

30、xd_l* pply fluid prfwr of OWpa to fLctd concaccscarfing polnionly convacv lemntto scarfing pomeip*eify th* bov loeation to b initially *xpo*d te fluid pr*ur11需要通過命令執(zhí)行。（10）在Solution下插入命令，以便直接查看第三個載荷步施加流體壓力后的結(jié)果, 點擊Solution右鍵，插入命令。J Statk Structural (A5) Analyse Settnqs v密 Fixed Support 丿電 Dsplacement

31、v民 Commands (APDL) 0甸Q ConEvaluate All ResultsIs of Solution (A6) aptive Mesh x 門、八、 ix Refinement Loops finement DepthV Clear Generated Data fljb Rename (F2)KI Group All Similar ChildrenformationItus29. Elapsed TimeXPDL Memory Used XPDL Result File SizeOpen Solver Files Directory Q? Worksheet Resul

32、t SummaryDeformationStrainStressEnergyLinearized StressStress ToolFatigueContact ToolBolt ToolProbest Processingam Section ResultsNO Demand 5tress/5trainNoCoordinate Systems 鹽* User Defined ResultInsert(11)點擊 Commands,右鍵，Import 相關(guān)文件 WS5a-post.inpoComma nds Export. 只匕 IMBD Post 、View 1 Loa / Solve (F

33、5)n”CommancExport.rt.Filter: Namej回0 a田d外 k Face SiNng 尹V Face Si2ing 2 丿閣 Face Sizing 3 S) 曲 Named Selections 白:Al Static Structural 卜 Analysis Sett)n y哼 Ftxed Support Displacement 便 Commands (AP白危I Solution (A6 ? I Soluton I . Total Def 勵 Eqjvalen EJ 金Contact勿 Refresh Search Parameters Suppress譽 D

34、uplicate 您 CopyX CutX Delete砒 Rename (F2)砸 Rename Based on DefinitionWS5a-postinp|WS5aA WS5a-pressure.wbpz iWSSc-wear.inp冷WS5c-Wear.%vbpz2016/9/18 17:282016/9/18 17:282016/9/18 17:282016/9/18 17:282016/9/18 17:28|vS5a-post. inp4 f打開（0）|A11 Filw (*.*)二j取消文件啟（N）文件類型（T）（12）導入命令文件后，查看命令。（Pbsol命令為查看連續(xù)單元結(jié)

35、果云圖，分別查 看第二個載荷步，第三個載荷步剛開始，第三個載荷步最終的Fluid penetration pressure.）Outline4 CommandsFilter: Name囤V 8田&勿丿罠 Face Srang丿製 Face Srang 2丿氧 Face Sang 3IB 彌 Named Setectcns 3白 Static Structural (AS)J/y Analysis Settngs“場 Fixed Support Displacement“犀 Commands (APDl) E Solution (A6) j Solution Infbrmaton Total Defon