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第四章有限元求解
一、预处理
1、选择单元类型:
ANSYS Main Menu: Preprocessor →Element Type→Add/Edit/Delete… →Add… →beam:2D elastic 3→OK (返回到Element Types 窗口) →Close
图4.1 选择单元类型
2、定义材料参数:
ANSYS Main Menu: Preprocessor →Material Props →Material Models→Structural →Linear →Elastic→Isotropic: EX:3e10 (弹性模量),PRXY:0.3(泊松比)→OK
图4.2定义材料参数
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3、定义单元截面积和惯性矩:
ANSYS Main Menu: Preprocessor→Real constant →Add →Type beam 3 →Ok →Cross-sectional area AREA:0.05(横截面积) Area moment of inteia IZZ:1(惯性矩)→OK
图4.3定义单元截面积和惯性矩
二、模型建立:
1、画出关键点:
ANSYS Main Menu: Preprocessor →Modeling →Creat→Keypoint→ In Active CS→Node number 1 → X:0,Y:0,Z:0→ Apply → Node number 2 → X:0,Y:1,Z:→ Apply → Node number 3 → X:2,Y:1,Z:0→OK
2、构造连线:
ANSYS Main Menu: Preprocessor →Modeling →Creat→Line →lines→straight line →依次连接特征点→Ok
图4.4模型建立
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3、划分网格:
ANSYS Main Menu: Preprocessor →Meshing→Meshtool →Set →选择1,2节点之间部分→Apply→选择2,3节点之间部分→单元长度分别为0.1和0.2→OK
Meshing→Meshtool →Mesh→分别选择1和2,2和3节点之间部分→OK
图4.4 划分网格
4、添加约束和载荷: 左下角和右上角添加约束:
ANSYS Main Menu: Preprocessor →Solution→Define loads →Apply →Structural →Displacement →On nodes →选择1节点→ALL DOF→Apply→On nodes →选择1节点→ALL DOF→OK 添加顶部均布载荷:
ANSYS Main Menu: Preprocessor →Solution→Define loads →Apply →Structural →Pressure →On beams →选择顶部所有的单元→VALI pressure value node I :1000 VALJ pressure value node J :1000 →OK 添加力矩和力:
ANSYS Main Menu: Preprocessor →Solution→Define loads →Apply →Structural →Force/ Monment→On nodes →选择2节点→Apply →LAB MZ VALUE100 . (输入力矩)→On nodes →选择8节点→Apply →LAB FXVALUE1000(输入力)
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图4.5 添加约束和载荷
二、分析计算
ANSYS Main Menu: Solution → Solve → Current LS →OK → Should the Solve Command be Executed? Y→ Close (Solution is done! ) →关闭窗口
图4.6 求解模型
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