ANSYS结构静⼒学分析应⽤实例解析--钢桁架桥的受⼒分析 1. 问题描述
钢桁架桥简图如下，已知下承式简⽀钢桁架桥长72m，每个节段为12m，桥宽10m，⾼16m。设桥⾯板为0.3m厚的混凝⼟板。
2. 求解步骤
2.1 建⽴⼯作⽂件名和⼯作标题
/FILNAME,Structural
/TITLE,Truss Bridge Static Analysis
2.2 过滤图形界⾯
/COM, Structural ! 指定分析类型为结构分析
/PREP7
ET,1,BEAM4
ET,2,SHELL63
2.4 定义梁单元截⾯
Main Menu>Preprocessor>Sections>Beam>Common Sections
SECTYPE,1,BEAM,I, , 0 ! 定义⼯字型截⾯ SECOFFSET, CENT ！截⾯质⼼不偏移
SECDATA,0.4,0.4,0.4,0.016,0.016,0.016,0,0,0,0 ！定义⼯字型截⾯参数
SECTYPE,2,BEAM,I, , 0 ! 定义⼯字型截⾯
SECOFFSET, CENT ！截⾯质⼼不偏移
SECDATA,0.4,0.4,0.4,0.012,0.012,0.012,0,0,0,0 ！定义⼯字型截⾯参数
SECTYPE,3,BEAM,I, , 0 ! 定义⼯字型截⾯
SECOFFSET, CENT ！截⾯质⼼不偏移
SECDATA,0.3,0.3,0.4,0.012,0.012,0.012,0,0,0,0 ！定义⼯字型截⾯参数2.5 定义实常数
Main Menu>Preprocessor>Real Constants>Add/Edit/Delete杭州中泰垃圾焚烧厂
R,2,0.0141,0.128E-3,0.415E-3,0.4,0.4
R,3,0.0117,0.541E-4,0.324E-3,0.3,0.4
R,4,0.3
2.6 定义材料属性
MP,EX,1,2.1E11 ! 定义钢材的材料属性
MP,PRXY,1,0.3
MP,DENS,1,7800
MP,EX,2,3.5E10 ! 定义混凝⼟的材料属性MP,PRXY,2,0.1667 MP,DENS,2,25002013年会主题
N,,0,0,-5
NGEN,4,4,ALL,,,12,,,1
NGEN,2,1,ALL,,,,,10,1
NGEN,2,1,2,10,4,,16,,1
NGEN,2,1,3,11,4,,,-10,1
2.7.2 ⽣成半跨桥单元
TYPE,1
MAT,1
REAL,1
ESYS,0
SECNUM,1 ！选择截⾯编号TSHAP,LINE !选择线性单元E,11,14 E,12,13
四种形态和教育惩处相结合的认识
TYPE,1
MAT,1
REAL,2
ESYS,0
SECNUM,2 ！选择截⾯编号TSHAP,LINE !选择线性单元E,2,6 E,6,10
E,10,14
E,1,5
E,5,9
E,3,7
E,7,11
E,4,8
E,8,12
E,1,2
E,3,4
E,5,6
E,7,8
E,9,10
E,11,12
E,13,14
TYPE,1
MAT,1
REAL,3
ESYS,0
最牛妈妈SECNUM,3 ！选择截⾯编号TSHAP,LINE !选择线性单元E,3,6
E,6,11
E,4,5
E,5,12
E,2,3
E,1,4
E,6,7
E,5,8
广西气排球比赛规则E,10,11
E,9,12
TYPE,2
MAT,2
REAL,4
ESYS,0
SECNUM,3 ！选择截⾯编号TSHAP,QUAD !选择四边形单元E,1,2,6,5 E,5,6,10,9
E,9,10,14,13
Main Menu>Preprocessor>Modeling>Reflect>Nodes
NSYM,X,14,ALL ! 所有节点以YOZ 平⾯对称
ESYM,,14,ALL ！所有单元以YOZ 平⾯对称
2.7.4 合并重合节点和单元
NUMMRG,ALL,,,,LOW ! 合并重复节点单元，编号取较⼩者NUMCMP,ALL ! 压缩节点单元等编号
2.7.5 保存模型并退出前处理器
SA VE,’mo_xing’,’db’
FINISH
2.8 施加位移约束
/
SOL
2.8.1 施加位移约束
NSEL,S,,,23,24 ! 选择左端节点
D,ALL,,,,,,UX,UY,UZ ! 对左端节点施加位移约束
NSEL,S,,,13,14 ! 选择右端节点
D,ALL,,,,,,UY,UZ ! 对右端节点施加位移约束
2.8.2 施加集中⼒
NSEL,S,,,1,2 ! 选择中间节点
F,ALL,FY,-100000 ! 对中间节点施加竖向集中⼒荷载2.8.3 施加重⼒
ALLSEL,ALL
ACEL,0,10,0 ! 施加重⼒
2.9 求解计算
ANTYPE,0
SOLVE
FINISH
2.10 查看计算结果
2.10.1 查看结构变形图
/POST1
PLDISP,2 ! 显⽰结构变形图
2.10.2 云图显⽰位移PLNSOL,U,SUM,0,1 ! 显⽰总位移云图
Main Menu>General Postproc>Plot Results>Vector Plot>Predefined
PLVECT,U,,,,VECT,NODE,ON,0 ! 显⽰节点总位移⽮量图
2.10.4 显⽰结构内⼒图
2.10.4.1 定义单元表
Main Menu>General Postproc>Element Table>Define Table
ETABLE,zhouli_i,SMISC,1 ! 定义单元表轴⼒
ETABLE,zhouli_j,SMISC,7
ETABLE,jianli_i,SMISC,2 ! 定义单元表剪⼒
ETABLE,jianli_j,SMISC,8
ETABLE,wanju_i,SMISC,6 ! 定义单元表弯矩
合成氨反应ETABLE,wanju_j,SMISC,12
2.10.4.2 列表单元表结果
PRETAB, zhouli_i, zhouli_j, jianli_i, jianli_j, wanju_i, wanju_j ! 列表显⽰单元表结果
Main Menu>General Postproc>Plot Results>Contour Plot>Line Elem Res
PLLS, zhouli_i, zhouli_j,1,0 ! 显⽰轴⼒图
