ANSYS热应力分析经典例题.doc

ANSYS热应力分析例题
实例1——圆简内部热应力分折：有一无限长圆筒，其核截面结构如图13—1所示，简内壁温度为200℃，外壁温度为20℃，圆筒材料参数如表13．1所示，求圆筒内的温度场、应力场分布。该问题属于轴对称问题。由于圆筒无限长，忽略圆筒端部的热损失。沿圆筒纵截面取宽度为10M的如图13—2所示的矩形截面作为几何模型。在求解过程中采用间接求解法和直接求解法两种方法进行求解。间接法是先选择热分析单元，对圆筒进行热分析，然后将热分析单元转化为相应的结构单元，对圆筒进行结构分析；直接法是采用热应力藕合单元，对圆筒进行热力藕合分析。/filname,exercise1-jianjie/title,thermalstressesinalong/prep7$Et,1,plane55Keyopt,1,3,1$Mp,kxx,1,70Rectng,0.1,0.15,0,0.01$Lsel,s,,,1,3,2Lesize,all,,,20$Lsel,s,,,2,4,2Lesize,all,,,5$Amesh,1$Finish/solu$Antype,staticLsel,s,,,4$Nsll,s,1$d,all,temp,200lsel,s,,,2$nsll,s,1$d,all,temp,20allsel$outpr,basic,allsolve$finish/post1$Set,last/plopts,info,onPlnsol,temp$Finish/prep7$Etchg,ttsKeyopt,1,3,1$Keyopt,1,6,1Mp,ex,1,220e9$Mp,alpx,,1,3e-6$Mp,prxy,1,0.28Lsel,s,,,4$Nsll,s,1$Cp,8,ux,allLsel,s,,,2$Nsll,s,1$Cp,9,ux,allAllsel$Finish/solu$Antype,staticD,all,uy,0$Ldread,temp,,,,,,rthAllsel$Solve$Finish/post1/title,radialstresscontoursPlnsol,s,x/title,axialstresscontoursPlnsol,s,y/title,circularstresscontoursPlnsol,s,z/title,equvialentstresscontoursPlnsol,s,eqv$finish/filname,exercise1-zhijie/title,thermalstressesinalong/prep7$Et,1,plane13Keyopt,1,1,4$Keyopt,1,3,1Mp,ex,1,220e9$Mp,alpx,,1,3e-6$Mp,prxy,1,0.28MP,KXX,1,70Rectng,0.1,0.15,0,0.01$Lsel,s,,,1,3,2Lesize,all,,,20$Lsel,s,,,2,4,2Lesize,all,,,5$Amesh,1Lsel,s,,,4$Nsll,s,1$Cp,8,ux,allLsel,s,,,2$Nsll,s,1$Cp,9,ux,allALLSEL$Finish/solu$Antype,staticLsel,s,,,4$Nsll,s,1$d,all,temp,200lsel,s,,,2$nsll,s,1$d,all,temp,20allsel$outpr,basic,allsolve$finish/post1$Set,last/plopts,info,onPlnsol,temp/title,radialstresscontoursPlnsol,s,x/title,axialstresscontoursPlnsol,s,y/title,circularstresscontoursPlnsol,s,z/title,equvialentstresscontoursPlnsol,s,eqv$finish318页实例2——冷却栅管的热应力分析图中为一冷却栅管的轴对称结构示意图，其中管内为热流体，温度为200℃，压力为10Mp,对流系数为110W／(m2•℃)；管外为空气，温度为25℃，对流系数为30w／(mz．℃)。栅管材料参数如表13—2所示，求栅管内的温度场和应力场分布。根据对称性，并在图示边界线段上施加对称边界约束，进行热应力分析求解。FINISH$/CLEA/filname,exercise2/title,thermalstressesinanaxisymmetricalpipe/prep7$et,1,plane13$Keyopt,1,1,4mp,ex,1,200e9$Mp,alpx,1,1.5e-5mp,prxy,1,0.3$mp,