梁的建模--创建框架结构

Workshop Supplement
001290 12 Dec 1999
W4-7
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
5. 划分截面为“girder”的水平线
– Select Entities: • Choose Lines, By Location, Y Coordinates; Min, Max = 480 • From Full, [Apply], [Replot] • Min, Max = 240 • Also Select, [Apply], [Replot] • Min, Max = 0 • Also Select, [Apply], [Replot] • Z Coordinates; Min, Max = 0,119 • Unselect, [Apply], [Replot]
Workshop Supplement
001290 12 Dec 1999
W4-9
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
6. 划分截面为“peak”的坡度线
– Select Entities: • 选择Lines, By Location, Z Coordinates; 在Min, Max 处输入 121, 165 • 点From Full, [Apply]
Workshop Supplement
001290 12 Dec 1999
W4-11
INTRODUCTION TO ANSYS 5.6 - Part 2
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
8. 最后对框架的顶面划分面单元
– MeshTool: • Element Attributes: 设置为 [Global]: 点 [Set] – TYPE = 2, MAT = 1, ESYS = 0, SECNUM = "No Section" – [OK] • Mesh: 设置到 [Areas] • Shape: 设置为 "Quad" and "Free" • 点 [Mesh] – [Pick All]
– Utility Menu > Plot > Lines – MeshTool:
• Element Attributes: [Lines]: 点 [Set] – [Pick All] – MAT = 1, TYPE = 1, SECT = 3, Pick Orientation keypoints = Yes, [OK] – 输入 101为方向点，按回车, 然后[OK]
• Size Controls: Lines: 点 [Set] – [Pick All] – 定义线的等分NDIV = 6, 然后点 [OK]
• 点 [Mesh] – [Pick All]
– 或命令: • LSEL,S,SEC,,1,4 • LSEL,INVE • LATT,1,,1,,101,,3 • LESIZE,ALL,,,6 • LMESH,ALL
来自百度文库
Workshop Supplement
001290 12 Dec 1999
W4-4
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
3. (续)
– 命令方式: • SECTYPE,1,BEAM,I,COLUMN • SECDATA,12,12,12.12,.605,.605,.39 • SECTYPE,2,BEAM,I,GIRDER • SECDATA,10.425,10.425,16.97,.985,.985,.585 • SECTYPE,3,BEAM,I,BEAM • SECDATA,6.535,6.535,8.06,.465,.465,.285 • SECTYPE,4,BEAM,HREC,PEAK • SECDATA,6,6,.25,.25,.25,.25,0,0,0,0 • SAVE
001290 12 Dec 1999
W4-6
梁的建模
创建框架结构
4. (cont'd)
– Or issue: • CSYS,0 • LSEL,S,LOC,Z,0,119 • LATT,1,,1,,102,,1 • LESIZE,ALL,,,4 • LMESH,ALL • /ESHAPE,1 • EPLOT
Workshop Supplement
001290 12 Dec 1999
W4-8
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
5. (续)
– 命令: • LSEL,S,LOC,Y,480 • LSEL,A,LOC,Y,240 • LSEL,A,LOC,Y,0 • LSEL,U,LOC,Z,0,119 • LATT,1,,1,,101,,2 • LESIZE,ALL,,,6 • LMESH,ALL
INTRODUCTION TO ANSYS 5.6 - Part 2
001290 12 Dec 1999
W4-3
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
3. 依次定义3个工字型梁截面和一个箱型梁截面, 然后保存文件
– Main Menu > Preprocessor > -Beam- Common Sectns … • ID = 1, Name = column, Sub-Type = I • W1 = 12, W2 = 12, W3 = 12.12, t1 = 0.605, t2 = 0.605, t3 = 0.39 • [Apply] • ID = 2, Name = girder, Sub-Type = I • W1 = 10.425, W2 = 10.425, W3 = 16.97, t1 = 0.985, t2 = 0.985, t3 = 0.585 • [Apply] • ID = 3, Name = beam, Sub-Type = I • W1 = 6.535, W2 = 6.535, W3 = 8.06, t1 = 0.465, t2 = 0.465, t3 = 0.285 • [Apply] • ID = 4, Name = peak, Sub-Type = (hollow rectangle) • W1 = 6, W2 = 6, t1 = 0.25, t2 = 0.25, t3 = 0.25, t4 = 0.25 • [OK] • Toolbar > SAVE_DB
Workshop Supplement
001290 12 Dec 1999
W4-5
梁的建模
创建框架结构
Workshop Supplement
INTRODUCTION TO ANSYS 5.6 - Part 2
4. 对定义为“column” 截面的垂直线划分网格
– Utility Menu > WorkPlane > Change Active CS to > Global Cartesian – Utility Menu > Select > Entities...
– 或命令: • TYPE,2 • SECNUM,0 • AMESH,ALL
Workshop Supplement
001290 12 Dec 1999
W4-12
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
9. 约束柱最下端 (Z=0)的节点 所有方向自由度 10.载荷步 1: 施加Z方向的重力加速度
Workshop Supplement
001290 12 Dec 1999
W4-10
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
7. 划分所有定义为“beam”截面的线
– Select Entities: • 选 Lines, By Attributes, Section ID num; 在Min, Max处输入1,4 • From Full, [Apply], [Invert]
• 已知: 已建立了一个包含几何模型和材料属性的命令流文件（bldggeom.inp)
001290 12 Dec 1999
W4-2
梁的建模
创建框架结构
Workshop Supplement
1. 启动ANSYS并设置工作文件名“bldg 2. 选择File>Read Input from… ，找到文件“bldg-geom.inp”，读入后生成框架的几何模型
– MeshTool: • Element Attributes: [Lines]: press [Set] – [Pick All] – MAT = 1, TYPE = 1, SECT = 2, Pick Orientation keypoints = Yes, [OK] – Enter 101 for orientation keypoint and press the Enter key, then [OK] • Size Controls: Lines: press [Set] – [Pick All] – NDIV = 6, then [OK] • Press [Mesh] – [Pick All]
• 选择 Lines, By Location, Z Coordinates; 在Min, Max中输入 0, 119 • 选From Full, 点Apply, Replot – Main Menu > Preprocessor > MeshTool … • 在Element Attributes中选Lines，点Set
then [OK] • Size Controls: Lines: press [Set]
– [Pick All] – NDIV = 4, then [OK] • Mesh: set to [Lines] and press [Mesh] – [Pick All] – Utility Menu > PlotCtrls > Style > Size and Shape ... • /ESHAPE = 1 • [OK]
– Main Menu > Solution > -Loads- Apply > Gravity … • ACELZ = 386 • [OK]
– 或命令: • ACEL,,,386
• Size Controls: Lines: 点 [Set] – [Pick All] – 输入线的等分数NDIV = 4, 然后点 [OK]
• 点 [Mesh] – [Pick All]
– 或命令: • LSEL,S,LOC,Z,121,165 • LATT,1,,1,,103,,4 • LESIZE,ALL,,,4 • LMESH,ALL
– 在拾取框点Pick All – 在line attributes的设置MAT = 1, TYPE = 1, SECT = 1, Pick Orientation keypoints =
Yes, [OK] – 在Enter 102 in the Input Window for orientation keypoint and press the Enter key,
INTRODUCTION TO ANSYS 5.6 - Part 2
Workshop Supplement
Workshop 4 梁的建模
创建框架结构
INTRODUCTION TO ANSYS 5.6 - Part 2
梁的建模
创建框架结构
Workshop Supplement
• 本算例通过对一个框架结构承受重力和“雪载”（ 0.25 psi ）的分析， 以确定结构的变形和应力
– Utility Menu > Plot > Lines – MeshTool:
• Element Attributes: [Lines]: 点 [Set] – [Pick All] – MAT = 1, TYPE = 1, SECT = 2, Pick Orientation keypoints = Yes, [OK] – 在输入窗口输入 103作为梁的方向点，按回车 然后点 [OK]