ANSYS求解桁架問(wèn)題實(shí)例

1ANSYS求解桁架問(wèn)題實(shí)例例F=1000N1m1m124①②③3由3根桿組成成的靜不不定桁架模型如下下圖所示示，材料料E=2.1e11Pa，μ=0.3，桿的橫橫截面積積均為A=0.25m2。根據(jù)結(jié)構(gòu)構(gòu)的特點(diǎn)點(diǎn)及所受受載荷的的情況，，正確選選取單元元類(lèi)型，，構(gòu)造桁架的有限元元模型；；1、計(jì)算約約束節(jié)點(diǎn)點(diǎn)的約束束反力；；2、計(jì)算受受力節(jié)點(diǎn)點(diǎn)的位移移和各桿桿的軸力力；3、利用靜靜力平衡衡關(guān)系，，檢查計(jì)計(jì)算結(jié)果果是否合合理。22、分析類(lèi)類(lèi)型靜力分析析3、問(wèn)題描描述一維桿問(wèn)問(wèn)題4、ANSYS單位mNPa5、單元LINK1：2節(jié)點(diǎn)（每每個(gè)節(jié)點(diǎn)點(diǎn)2個(gè)自由度度）6、材料彈性模量量和泊松松比7、實(shí)常數(shù)數(shù)面積A8、建模直接建立立有限元元模型31進(jìn)入ANSYS程序→→ANSYSED12→ANSYSProductLauncher→changetheworkingdirectoryintoyours→inputInitialjobname:truss→Run2設(shè)置計(jì)算算類(lèi)型ANSYSMainMenu:Preferences→selectStructural→→OK43選擇單元元類(lèi)型ANSYSMainMenu:Preprocessor→→ElementType→Add/Edit/Delete→→Add→→selectLink2Dspar1→OK(backtoElementTypeswindow)→Close(theElementTypewindow)54定義實(shí)常常數(shù)ANSYSMainMenu:Preprocessor→→RealConstants……→Add……→selectType1→OK→inputAREA:0.25→OK→→Close(theRealConstantsWindow)5定義材料料參數(shù)ANSYSMainMenu:Preprocessor→→MaterialProps→→MaterialModels→→Structural→→Linear→Elastic→Isotropic→→inputEX:2.1e11,PRXY:0.3→OK6生成節(jié)點(diǎn)點(diǎn)ANSYSMainMenu:Preprocessor→→Modeling→→Create→→Nodes→→InActiveCS→→依次輸入入四個(gè)點(diǎn)點(diǎn)的坐標(biāo)標(biāo)：input:1(0,0),2(1,0),3(1,1),4(0,1)→→OK7生成單元元ANSYSMainMenu:Preprocessor→→Modeling→→Create→→elements→→AutoNumbered→→ThruNodes→→依次連接接節(jié)點(diǎn)2，3；節(jié)點(diǎn)1，2；節(jié)點(diǎn)2，4；→OK打開(kāi)節(jié)點(diǎn)點(diǎn)號(hào)：UtilityMenu：Plotctrls→→Numbering→選項(xiàng)NODENodenumbers為On→→在Elem/Attribnumbering選擇Elementnumbers→→OK顯示元素素：UtilityMenu：Plot→emements678模型施加加約束給節(jié)點(diǎn)1、3、4施加x和y方向的約約束ANSYSMainMenu:Solution→DefineLoads→→Apply→Structural→Displacement→→OnNodes→→節(jié)點(diǎn)1、3、4→OK→→selectLab2:ALLOFF→OK給節(jié)點(diǎn)2施加y方向載荷ANSYSMainMenu:Solution→→DefineLoads→→Apply→Structural→Force/Moment→OnNodes→拾取節(jié)點(diǎn)2→OK→→Lab:FY,Value:-1000→OK9分析計(jì)