ANSYS公路隧道二次衬砌受力分析

公路隧道二次衬砌受力分析1课程设计任务书题目公路隧道二次衬砌受力分析一、设计的目的学会利用ANSYS的功能分析隧道二次衬砌等一些相对复杂的结构，使对ANSYS的操作更加娴熟，更好的投入实际应用。二、设计的内容及要求设计内容：某高速公路隧道，采用矿山法施工，隧道V级围岩中。其围岩埋深为21.173m，隧道内断面轮廓如下图，采用C30混凝土，厚度为50cm。做出内力图，列出各单元内力值。《二衬荷载按照计算荷载的30%计算，并保留三位小数》操作步骤：1.1指定工作文件名。执行“开始→程序→ANSYS→ANSYSProductLauncher”菜单命令创建JobName为MechanicalanalysisonpermanentliningoftunnelinExpress-way1.2定义分析标题执行“UtilityMenu→File→ChangeTitle”菜单命令，在对话框中输入“MechanicalanalysisonpermanentliningoftunnelinExpress-way”MainMenu→preferencers在弹出的菜单选择structural.1.3定义单元类型执行“MainMenu→Preprocess→ElementType→Add/Edit/Delete”然后执行：add→beam→2Delastic3→OK；再Add→COMBIN→Spring-damper14→OK关闭窗口。1.4定义单元实常数执行MainMenu→Preprocessor→RealConstants→Add/Edit/Delete→add→ok→Type1BEAM3→OK→RealConstantSetNo.栏中输入1，在AREA栏输入0.5→在IZZ(惯性矩)栏输入0.5*0.5*0.5*/12→HEIGHT(高度)栏输入0.5→Apply;同理定义弹簧实常数k，100e6。1.5定义材料属性1、执行：MainMenu→Preprocessor→Materialprops→MaterialModels→Structural→Linear→Elastic→Isotropic→在弹性模量EX栏输入30e9→在PRXY栏输入0.2→OK，再点击Density，DENS栏输入2500→执行“Meterial→公路隧道二次衬砌受力分析2NewModle”，单击OK，双击Isotropic，在EX栏填写1E9，在PRXY栏填写0.35，单击OK，双击Density，在DENS栏填写1800，单击OK，关闭对话框；1.6定义截面属性MainMenu→Preprocessor→sections→Beam→Commonsections→B中输入,1→在H中输入0.5→ok1.7建立几何模型⑴执行：MainMenu→preprocessor→Modeling→Create→Keypoints→inactiveCS→依次输入坐标点1（0,0）点击Apply,如此依次输入，2（-3.34，0），3（3.34,0），4（0,11.37），点击OK。⑵执行命令circle,1,5.65circle,2,2.52circle,3,2.52circle,4,14.25circle,1,6.65circle,2,3.52circle,3,3.52circle,4,15.25生成八个圆。⑶执行Modeling→operate→booleans→overlay然后根据需要两根线搭接生成关键点。⑷执行Modeling→delete→linesonly选择不需要的线点击Apply→OK.⑸执行PlotCtrls→Symbols→LDIRLine将off打√变为on→OK.⑹执行Modeling→move/modify→reverseNormols→oflines→on打√变为yes→OK.1.8划分单元GUI执行：MainCMenu→preprocessor→Meshing→Meshtool→ElementAttributes选择lines→set→选择L1、L2、L6、L10、L9、L11、L12、L8的8段→Apply→OK;SizeControls→lines→set→选择L3、L4、L1、L2的4段→Apply在NDIV输入16→OK；同理分别选择L5、L6、L7、L8、L10、L14、L12、L16→输入2；L9、L11、L13、L15→输入10；点击OK，点击Mesh,点击PickAll.1.9生成弹簧执行：PlotCtrls→Numbering→勾选Nodenumber为on执行：MainMenu→Preprocessor→Modeling→Creat→Eelement→ElemAttributes→选择所有都为第二项→OK。执行：MainMenu→Preprocessor→Modeling→Creat→Eelement→AutoNumbered→thruNodes→然后相应节点相连接，即生成弹簧单元。执行Meshing→clear→选中外面的线→点击OK。执行Modeling→delete→linesonly选择不需要的线点击Apply→OK.2.0加约束，荷载(1)执行：Main→Menu→solution→DefineLoads→Apply→Structural→Displacement→onnodes→在弹簧末端施加UX、UY方向约束;公路隧道二次衬砌受力分析3(2)执行F,17,fx,-1396.85fy,-123119F,16,fx,-2809.83fy,-121337F,15,fx,-4253.78fy,-118387F,14,fx,-5741.03fy,-114297F,13,fx,-7280.22fy,-109106F,12,fx,-8875.4fy,-102865F,11,fx,-10525.2fy,-95632.5F,10,fx,-12222.4fy,-87479.3F,9,fx,-13953.5fy,-78483.6F,8,fx,-15699fy,-68732F,7,fx,-17433.5fy,-58318.6F,6,fx,-19126.1fy,-47343.4F,5,fx,-20741.8fy,-35912.4F,4,fx,-22241.9fy,-24135.5F,3,fx,-23585.9fy,-12126.1F,1,fx,-27049.8fy,0F,72,fx,-30500.5fy,0F,71,fx,-25909.2fy,0F,109,fx,-18697.7fy,0F,99,fx,-12293.4fy,0F,108,fx,-7808.54fy,0F,107,fx,-7028.54fy,0F,106,fx,-6218.13fy,0F,105,fx,-5380.78fy,0F,104,fx,-4520.12fy,0F,103,fx,-3639.86fy,0F,102,fx,-2743.81fy,0F,101,fx,-1835.85fy,0F,100,fx,-992.454fy,0F,2,fx,0fy,-123714F,19,fx,1396.846fy,-123119F,20,fx,2809.825fy,-121337F,21,fx,4253.781fy,-118387F,22,fx,5741.026fy,-114297F,23,fx,7280.218fy,-109106F,24,fx,8875.395fy,-102865F,25,fx,10525.21fy,-95632.5F,26,fx,12222.4fy,-87479.3F,27,fx,13953.54fy,-78483.6F,28,fx,15699.04fy,-68732F,29,fx,17433.46fy,-58318.6F,30,fx,19126.09fy,-47343.4公路隧道二次衬砌受力分析4F,31,fx,20741.76fy,-35912.4F,32,fx,22241.93fy,-24135.5F,33,fx,23585.93fy,-12126.1F,18,fx,27049.78fy,0F,74,fx,30500.54fy,0F,73,fx,25909.15fy,0F,86,fx,18697.68fy,0F,75,fx,12293.39fy,0F,77,fx,7808.54fy,0F,78,fx,7028.54fy,0F,79,fx,6218.125fy,0F,80,fx,5380.782fy,0F,81,fx,4520.12fy,0F,82,fx,3639.859fy,0F,83,fx,2743.807fy,0F,84,fx,1835.849fy,0F,85,fx,992.4544fy,0(3)自重荷载Main→Menu→solution→DefineLoads→Apply→Structural→Inertia→Gravity→Global→ACELY栏中输入10→OK2.1求解GUI执行：Main→Menu→solution→solve→currentLS→ok，得到一个计算结果。2.2计算变形图。执行：selectentities选择Elements和Reselect，选择衬砌。单击OK。执行；Plotctrls→style→sizeandshape→Displayofelement→勾选为On执行：Main→Menu→Geaneralpostproc→Plotresult→Deformedshape→得出变形图。执行：File→ReportGenerator-Append,生成一个抓图工具，抓取变形图。2.3定义轴力、剪力、弯矩GUI执行：Main→Menu→Geaneralpostproc→Elementtable→Dfinetable→add→Bysequencenum→定义轴力在lab栏中输入→IN→SMISC,1→Apply；在lab栏中输入→IN→SMISC,7→Apply；同理定义剪力IQ、JQ,分别对应SMISC,2、SMISC,8；同理定义弯矩IM、JM，分别对应SMISC,6、SMISC,12。2.4分别绘制出轴力、剪力、弯矩图(1)执行：Main→Menu→Geaneralpostproc→PlotResults→contorplot→lineelemres→LabI选择1,LabJ选择7→OK得出了轴力图。(2)执行：Main→Menu→Geaneralpostproc→PlotResults→contorplot→lineelemres→LabI选择2,LabJ选择8→OK得出了剪力图。公路隧道二次衬砌受力分析5(3)执行：Main→Menu→Geaneralpostproc→PlotResults→contorplot→lineelemres→LabI选择6,LabJ选择12，Fact栏中输入-1→OK得出了弯矩图。若受力图不对，则可能是因为上部弹簧受拉造成。则执行命令nropt,full,,allseloutres,all,all再执行：solution→loadstepopts→other→Dirth&death→kirlelement选择上面相对称的弹簧→OK。再执行上面操作查看内力图，直到满足要求为止。得到图形如下：受力图：变形图：公路隧道二次衬砌受力分析6轴力图：剪力图：公路隧道二次衬砌受力分析7弯矩图：公路隧道二次衬砌受力分析8再执行列表显示单元的轴力、剪力、弯矩：执行“MainMenu→GeneralPostproc→ListResults→ElemTableData”，在对话框中选择IN、JN、IQ、JQ、IM、JM，单击OK，即得各个单元轴力、剪力、弯矩，见后附表PRINTELEMENTTABLEITEMSPERELEMENT*****POST1ELEMENTTABLELISTING*****STATPREVIOUSPREVIOUSPREVIOUSPREVIOUSPREVIOUSPRE