ANSYS矮塔斜拉桥建模荷载与动力分析.docx

ANSYS矮塔斜拉桥建模荷载与动力分析.docx

《ANSYS矮塔斜拉桥建模荷载与动力分析.docx》由会员分享，可在线阅读，更多相关《ANSYS矮塔斜拉桥建模荷载与动力分析.docx（75页珍藏版）》请在冰豆网上搜索。

ANSYS矮塔斜拉桥建模荷载与动力分析

目录

一．文件名及前处理模式3

二．截面的建立3

1.主梁截面3

2.桥塔截面31

三．定义单元属性32

四．建立主要节点和单元33

1.主梁节点和单元33

2.桥塔节点和单元40

3.斜拉索节点和单元41

4.鱼刺骨模型模拟斜拉索与主梁连接42

五．加载与求解44

1.施加边界条件44

2.施加自重和公路一级荷载44

六．动力特性44

1.前十阶模态自振频率44

2.前五阶振型图45

一．文件名及前处理模式

定义工作文件名与工作标题，并进入前处理模式（PREP7）：

/FILNAME,BRIDGE,1!

定义工作文件名

/TITLE,ZHANGHAONAN’SHOMEWORK!

定义工作标题

/REPLOT!

重新显示

/PREP7!

进入PREP7处理器

二．截面的建立

1.主梁截面

根据本桥图纸，截面一共有32个，其中包括截面纵向变化与横向变化，为简化模型，减小工作量，选取其中11个截面作为分析对象，可以大致上反应桥梁的形态，从左到右选取图纸中的截面：

截面1：

左边跨直线段截面

截面8：

4号墩墩顶截面

截面11：

截面第一次横向变化（39M—43M）起始截面

截面14：

截面第一次横向变化（39M—43M）结束截面

截面16：

主跨跨中截面

截面22：

截面第二次横向变化（43M—45M）起始截面

截面24：

截面第二次横向变化（43M—45M）结束截面

截面25：

5号墩墩顶截面

截面27：

截面第二次横向变化（45M—39M）起始截面

截面31：

截面第二次横向变化（45M—39M）结束截面

截面32：

6号墩墩顶截面

由于截面形式复杂，而变截面需要前后两端的拓扑一致，即两端的形状，线与线的关系必须一致，两端截面的节点能一一对应，不使用辅助软件的条件下，必须对这些截面在输入时进行划分，取单元形状为四边形，方向为逆时针，并定义梁截面为MESH（自定义截面），截面偏移为梁节点偏移至横截面圆点。

命令流如下：

（1）截面1：

K,1,19.5,-0.39$K,2,18,-0.36$K,3,18,-0.65

K,4,19.5,-0.65$K,5,-19.5,-0.65$K,6,-18,-0.65

K,7,-18,-0.36$K,8,-19.5,-0.39$K,9,18,-0.36

K,10,17.15,-0.343$K,11,17.15,-0.843$K,12,18,-0.65

K,13,-18,-0.65$K,14,-17.15,-0.843$K,15,-17.15,-0.343

K,16,-18,-0.36$K,17,17.15,-0.343$K,18,16.65,-0.333

K,19,16.65,-0.843$K,20,17.15,-0.843$K,21,-17.15,-0.843

K,22,-16.65,-0.843$K,23,-16.65,-0.333$K,24,-17.15,-0.343

K,25,16.65,-0.333$K,26,15.65,-0.313$K,27,15.65,-0.573

K,28,16.65,-0.833$K,29,-16.65,-0.833$K,30,-15.65,-0.573

K,31,-15.65,-0.313$K,32,-16.65,-0.333$K,33,15.65,-0.313

K,34,12.45,-0.249$K,35,12.45,-0.509$K,36,15.65,-0.573

K,37,-15.65,-0.573$K,38,-12.45,-0.509$K,39,-12.45,-0.249

K,40,-15.65,-0.313$K,41,12.45,-0.249$K,42,11.45,-0.229

K,43,11.45,-0.729$K,44,12.45,-0.509$K,45,-12.45,-0.509

K,46,-11.45,-0.729$K,47,-11.45,-0.229$K,48,-12.45,-0.249

K,49,11.45,-0.229$K,50,10.95,-0.219$K,51,10.95,-0.719

K,52,11.45,-0.729$K,53,-11.45,-0.729$K,54,-10.95,-0.719

K,55,-10.95,-0.219$K,56,-11.45,-0.229$K,57,10.95,-0.219

K,58,9.95,-0.199$K,59,9.95,-0.459$K,60,10.95,-0.719

K,61,-10.95,-0.719$K,62,-9.95,-0.459$K,63,-9.95,-0.199

K,64,-10.95,-0.219$K,65,9.95,-0.199$K,66,6.85,-0.137

K,67,6.85,-0.397$K,68,9.95,-0.459$K,69,-9.95,-0.459

K,70,-6.85,-0.397$K,71,-6.85,-0.137$K,72,-9.95,-0.199

K,73,6.85,-0.137$K,74,5.85,-0.117$K,75,5.85,-0.617

K,76,6.85,-0.397$K,77,-6.85,-0.397$K,78,-5.85,-0.617

K,79,-5.85,-0.117$K,80,-6.85,-0.137$K,81,5.85,-0.117

K,82,5.35,-0.107$K,83,5.35,-0.617$K,84,5.85,-0.617

K,85,-5.85,-0.617$K,86,-5.35,-0.617$K,87,-5.35,-0.107

K,88,-5.85,-0.117$K,89,5.35,-0.107$K,90,4.35,-0.087

K,91,4.35,-0.347$K,92,5.35,-0.607$K,93,-5.35,-0.607

K,94,-4.35,-0.347$K,95,-4.35,-0.087$K,96,-5.35,-0.107

K,97,4.35,-0.087$K,98,1.25,-0.025$K,99,1.25,-0.285

K,100,4.35,-0.347$K,101,-4.35,-0.347$K,102,-1.25,-0.285

K,103,-1.25,-0.025$K,104,-4.35,-0.087$K,105,1.25,-0.025

K,106,0.25,-0.005$K,107,0.25,-0.505$K,108,1.25,-0.285

K,109,-1.25,-0.285$K,110,-0.25,-0.505$K,111,-0.25,-0.005

K,112,-1.25,-0.025$K,113,0.25,-0.005$K,114,-0.25,-0.005

K,115,-0.25,-0.505$K,116,0.25,-0.505$K,117,0.25,-0.505

K,118,-0.25,-0.505$K,119,-0.25,-2.5$K,120,0.25,-2.5

K,121,0.25,-2.5$K,122,-0.25,-2.5$K,123,-0.25,-3

K,124,0.25,-3$K,125,0.85,-2.7$K,126,0.25,-2.5

K,127,0.25,-3$K,128,0.85,-3$K,129,-0.85,-3

K,130,-0.25,-3$K,131,-0.25,-2.5$K,132,-0.85,-2.7

K,133,4.75,-2.7$K,134,0.85,-2.7$K,135,0.85,-3

K,136,4.75,-3$K,137,-4.75,-3$K,138,-0.85,-3

K,139,-0.85,-2.7$K,140,-4.75,-2.7$K,141,5.35,-2.5

K,142,4.75,-2.7$K,143,4.75,-3$K,144,5.35,-3

K,145,-5.35,-3$K,146,-4.75,-3$K,147,-4.75,-2.7

K,148,-5.35,-2.5$K,149,5.85,-2.5$K,150,5.35,-2.5

K,151,5.35,-3$K,152,5.85,-3$K,153,-5.85,-3

K,154,-5.35,-3$K,155,-5.35,-2.5$K,156,-5.85,-2.5

K,157,6.45,-2.7$K,158,5.85,-2.5$K,159,5.85,-3

K,160,6.45,-3$K,161,-6.45,-3$K,162,-5.85,-3

K,163,-5.85,-2.5$K,164,-6.45,-2.7$K,165,10.35,-2.7

K,166,6.45,-2.7$K,167,6.45,-3$K,168,10.35,-3

K,169,-10.35,-3$K,170,-6.45,-3$K,171,-6.45,-2.7

K,172,-10.35,-2.7$K,173,10.95,-2.5$K,174,10.35,-2.7

K,175,10.35,-3$K,176,10.95,-3$K,177,-10.95,-3

K,178,-10.35,-3$K,179,-10.35,-2.7$K,180,-10.95,-2.5

K,181,11.45,-2.5$K,182,10.95,-2.5$K,183,10.95,-3

K,184,11.45,-3$K,185,-11.45,-3$K,186,-10.95,-3

K,187,-10.95,-2.5$K,188,-11.45,-2.5$K,189,12.05,-2.7

K,190,11.45,-2.5$K,191,11.45,-3$K,192,12.05,-3

K,193,-12.05,-3$K,194,-11.45,-3$K,195,-11.45,-2.5

K,196,-12.05,-2.7$K,197,16.05,-2.7$K,198,12.05,-2.7

K,199,12.05,-3$K,200,16.05,-3$K,201,-16.05,-3

K,202,-12.05,-3$K,203,-12.05,-2.7$K,204,-16.05,-2.7

K,205,16.65,-2.5$K,206,16.05,-2.7$K,207,16.05,-3

K,208,16.65,-3$K,209,-16.65,-3$K,210,-16.05,-3

K,211,-16.05,-2.7$K,212,-16.65,-2.5$K,213,17.15,-2.5

K,214,16.65,-2.5$K,215,16.65,-3$K,216,17.15,-3

K,217,-17.15,-3$K,218,-16.65,-3$K,219,-16.65,-2.5

K,220,-17.15,-2.5$K,221,5.85,-0.617$K,222,5.35,-0.617

K,223,5.35,-2.5$K,224,5.85,-2.5$K,225,-5.85,-2.5

K,226,-5.35,-2.5$K,227,-5.35,-0.617$K,228,-5.85,-0.617

K,229,11.45,-0.729$K,230,10.95,-0.729$K,231,10.95,-2.5

K,232,11.45,-2.5$K,233,-11.45,-2.5$K,234,-10.95,-2.5

K,235,-10.95,-0.729$K,236,-11.45,-0.729$K,237,17.15,-0.843

K,238,16.65,-0.843$K,239,16.65,-2.5$K,240,17.15,-2.5

K,241,-17.15,-2.5$K,242,-16.65,-2.5$K,243,-16.65,-0.843

K,244,-17.15,-0.843!

创建关键点

*DO,I,1,241,4

A,I,I+1,I+2,I+3

*ENDDO!

循环创建截面

ET,1,PLANE82!

定义单元

LESIZE,ALL,,,3!

网分控制，设置每条线的划分数目为3

AMESH,ALL!

网格划分

SECWRITE,MYBOX1!

采用缺省扩展名写入MYBOX1文件

SECTYPE,1,BEAM,MESH!

定义用户梁截面

SECOFFSET,ORIGIN!

将梁节点偏移到横截面原点

FINISH

（2）截面8：

/CLEAR

/PREP7

K,1,19.5,-0.39$K,2,18,-0.36$K,3,18,-0.65

K,4,19.5,-0.65$K,5,-19.5,-0.65$K,6,-18,-0.65

K,7,-18,-0.36$K,8,-19.5,-0.39$K,9,18,-0.36

K,10,17.15,-0.343$K,11,17.15,-0.843$K,12,18,-0.65

K,13,-18,-0.65$K,14,-17.15,-0.843$K,15,-17.15,-0.343

K,16,-18,-0.36$K,17,17.15,-0.343$K,18,16.45,-0.329

K,19,16.45,-0.829$K,20,17.15,-0.829$K,21,-17.15,-0.829

K,22,-16.45,-0.829$K,23,-16.45,-0.329$K,24,-17.15,-0.343

K,25,16.45,-0.329$K,26,15.45,-0.309$K,27,15.45,-0.569

K,28,16.45,-0.829$K,29,-16.45,-0.829$K,30,-15.45,-0.569

K,31,-15.45,-0.309$K,32,-16.45,-0.329$K,33,15.45,-0.309

K,34,12.65,-0.253$K,35,12.65,-0.513$K,36,15.45,-0.569

K,37,-15.45,-0.569$K,38,-12.65,-0.513$K,39,-12.65,-0.253

K,40,-15.45,-0.309$K,41,12.65,-0.253$K,42,11.65,-0.233

K,43,11.65,-0.733$K,44,12.65,-0.513$K,45,-12.65,-0.513

K,46,-11.65,-0.733$K,47,-11.65,-0.233$K,48,-12.65,-0.253

K,49,11.65,-0.233$K,50,10.75,-0.215$K,51,10.75,-0.715

K,52,11.65,-0.715$K,53,-11.65,-0.715$K,54,-10.75,-0.715

K,55,-10.75,-0.215$K,56,-11.65,-0.233$K,57,10.75,-0.215

K,58,9.75,-0.195$K,59,9.75,-0.455$K,60,10.75,-0.715

K,61,-10.75,-0.715$K,62,-9.75,-0.455$K,63,-9.75,-0.195

K,64,-10.75,-0.215$K,65,9.75,-0.195$K,66,7.05,-0.141

K,67,7.05,-0.401$K,68,9.75,-0.455$K,69,-9.75,-0.455

K,70,-7.05,-0.401$K,71,-7.05,-0.141$K,72,-9.75,-0.195

K,73,7.05,-0.141$K,74,6.05,-0.121$K,75,6.05,-0.621

K,76,7.05,-0.401$K,77,-7.05,-0.401$K,78,-6.05,-0.621

K,79,-6.05,-0.121$K,80,-7.05,-0.141$K,81,6.05,-0.121

K,82,5.15,-0.103$K,83,5.15,-0.603$K,84,6.05,-0.603

K,85,-6.05,-0.603$K,86,-5.15,-0.603$K,87,-5.15,-0.103

K,88,-6.05,-0.121$K,89,5.15,-0.103$K,90,4.15,-0.083

K,91,4.15,-0.343$K,92,5.15,-0.603$K,93,-5.15,-0.603

K,94,-4.15,-0.343$K,95,-4.15,-0.083$K,96,-5.15,-0.103

K,97,4.15,-0.083$K,98,1.45,-0.029$K,99,1.45,-0.289

K,100,4.15,-0.343$K,101,-4.15,-0.343$K,102,-1.45,-0.289

K,103,-1.45,-0.029$K,104,-4.15,-0.083$K,105,1.45,-0.029

K,106,0.45,-0.009$K,107,0.45,-0.509$K,108,1.45,-0.289

K,109,-1.45,-0.289$K,110,-0.45,-0.509$K,111,-0.45,-0.009

K,112,-1.45,-0.029$K,113,0.45,-0.009$K,114,-0.45,-0.009

K,115,-0.45,-0.509$K,116,0.45,-0.509$K,117,0.45,-0.509

K,118,-0.45,-0.509$K,119,-0.45,-4.3$K,120,0.45,-4.3

K,121,0.45,-4.3$K,122,-0.45,-4.3$K,123,-0.45,-5

K,124,0.45,-5$K,125,1.05,-4.5$K,126,0.45,-4.3

K,127,0.45,-5$K,128,1.05,-5$K,129,-1.05,-5

K,130,-0.45,-5$K,131,-0.45,-4.3$K,132,-1.05,-4.5

K,133,4.55,-4.5$K,134,1.05,-4.5$K,135,1.05,-5

K,136,4.55,-5$K,137,-4.55,-5$K,138,-1.05,-5

K,139,-1.05,-4.5$K,140,-4.55,-4.5$K,141,5.15,-4.3

K,142,4.55,-4.5$K,143,4.55,-5$K,144,5.15,-5

K,145,-5.15,-5$K,146,-4.55,-5$K,147,-4.55,-4.5

K,148,-5.15,-4.3$K,149,6.05,-4.3$K,150,5.15,-4.3

K,151,5.15,-5$K,152,6.05,-5$K,153,-6.05,-5

K,154,-5.15,-5$K,155,-5.15,-4.3$K,156,-6.05,-4.3

K,157,6.65,-4.5$K,158,6.05,-4.3$K,159,6.05,-5

K,160,6.65,-5$K,161,-6.65,-5$K,162,-6.05,-5

K,163,-6.05,-4.3$K,164,-6.65,-4.5$K,165,10.15,-4.5

K,166,6.65,-4.5$K,167,6.65,-5$K,168,10.15,-5

K,169,-10.15,-5$K,170,-6.65,-5$K,171,-6.65,-4.5

K,172,-10.15,-4.5$K,173,10.75,-4.3$K,174,10.15,-4.5

K,175,10.15,-5$K,176,10.75,-5$K,177,-10.75,-5

K,178,-10.15,-5$K,179,-10.15,-4.5$K,180,-10.75,-4.3

K,181,11.65,-4.3$K,182,10.75,-4.3$K,183,10.75,-5

K,184,11.65,-5$K,185,-11.65,-5$K,186,-10.75,-5

K,187,-10.75,-4.3$K,188,-11.65,-4.3$K,189,12.25,-4.5

K,190,11.65,-4.3$K,191,11.65,-5$K,192,12.25,-5

K,193,-12.25,-5$K,194,-11.65,-5$K,195,-11.65,-4.3

K,196,-12.25,-4.5$K,197,15.85,-4.5$K,198,12.25,-4.5

K,199,12.25,-5$K,200,15.85,-5$K,201,-15.85,-5

K,202,-12.25,-5$K,203,-12.25,-4.5$K,204,-15.85,-4.5

K,205,16.45,-4.3$K,206,15.85,-4.5$K,207,15.85,-5

K,208,16.45,-5$K,209,-16.45,-5$K,210,-15.85,-5

K,211,-15.85,-4.5$K,212,-16.45,-4.3$K,213,17.15,-4.3

K,214,16.45,-4.3$K,215,16.45,-5$K,216,17.15,-5

K,217,-17.15,-5$K,218,-16.45,-5$K,219,-16.45,-4.3

K,220,-17.15,-4.3$K,221,6.05,-0.603$K,222,5.15,-0.603

K,223,5.15,-4.3$K,224,6.05,-4.3$K,225,-6.05,-4.3

K,226,-5.15,-4.3$K,227,-5.15,-0.603$K,228,-6.05,-0.603

K,229,11.65,-0.715$K,230,10.75,-0.715$K,231,10.75,-4.3

K,232,11.65,-4.3$K,233,-11.65,-4.3$K,234,-10.75,-4.3

K,235,-10.75,-0.715$K,236,-11.65,-0.715$K,237,17.15,-0.829

K,238,16.45,-0.829$K,239,16.45,-4.3$K,240,17.15,-4.3

K,241,-17.15,-4.3$K,242,-16.45,-4.3$K,243,-16.45,-0.829

K,244,-17.15,-0.829

*DO,I,1,241,4

A,I,I+1,I+2,I+3

*ENDDO

ET,1,PLANE82

LESIZE,ALL,,,3

AMESH,ALL

SECWRITE,BOX2

SECTYPE,2,BEAM,MESH

SECOFFSET,ORIGIN

FINISH

（3）截面11：

/CLEAR

/PREP7

K,1,19.5,-0.39$K,2,18,-0.36$K,3,18,-0.65

K,4,19.5,-0.65$K,5,-19.5,-0.65$K,6,-18,-0.65

K,7,-18,-0.36$K,8,-19.5,-0.39$K,9,18,-0.36

K,10,17.15,-0.343$K,11,17.15,