带斜撑组合结构

附录：ANSYS命令流!BRB_1模型FINISH/CLEAR,ALL/FILNAME,BRB_1/TITLE,AnalysisforBRB_1/REPLOT/PREP7!屈曲约束支撑高度L=3000R1=92$T1=15R2=100$T2=8Ml=200!过渡段长度!芯材单元ET,l,SOLIDl85MP,EX,l,2.06E5$MP,PRXY,l,0.3!外套筒单元ET,2,SOLID45MP,EX,2,2.06E5$MP,PRXY,2,0.3!定义BRB截面TYPE,lMAT,lCYLIND,Rl-Tl,Rl,0,L,,!建立芯材截面,芯材厚度为l5mmTYPE,2MAT,2CYLIND,R2-T2,R2,Ml,L-Ml,,!建立外套筒截面,外套筒厚度为8mm!划分网格VSEL,ALLESIZE,20VSWEEP,ALLALLSEL,ALL!定义芯材和外套筒接触单元!*建立目标单元ET,3,TARGEl70!*建立接触单元ET,4,CONTAl74MP,MU,4,0keyopt,4,1,0!选择自由度ux,uy,uzkeyopt,4,2,0!接触算法设为扩充的拉格朗日算法keyopt,4,4,0!在高斯点上搜索接触对keyopt,4,5,3!不考虑初始节点闭合以及接触面平移效应的自动调整keyopt,4,7,0!不进行单元水平上的时间增量控制keyopt,4,8,0!不进行非对称接触选择keyopt,4,9,2!不考虑初始渗透或间隙效应keyopt,4,10,1!设置conta173的接触刚度更新基于上一子步的平均应力keyopt,4,11,0!不计壳厚效应keyopt,4,12,2!标准的接触面接触行为!*建立目标面MP,MU,1,0定义接触摩擦MP,MU,3,0TYPE,1MAT,1CSYS,1ASEL,S,LOC,X,R1CM,_TARGET,AREAtype,3NSLA,S,1ESLN,S,0esurf,all,ALLSEL,ALL!*建立接触面CSYS,1TYPE,2MAT,2ASEL,S,LOC,X,R2-T2CM,_CONTACT,AREAtype,4NSLA,S,1ESLN,S,0esurf,all,ALLSEL,ALL!定义外套管的约束条件CSYS,1NSEL,S,LOC,X,R2D,ALL,UZ,0ALLSEL,ALL!定义芯材的约束条件CSYS,0NSEL,S,LOC,Z,0D,ALL,UX,0,,,,UY,UZALLSEL,ALLFINISH/SOLUANTYPE,STATICCSYS,0ASEL,S,LOC,Z,LSFA,ALL,,PRES,1,PSTRES,ONSOLVEFINISH/SOLUANTYPE,BUCKLEBUCOPT,LANB,5MXPAND,5,,,,YES,!设置求解输出OUTPR,BASIC,ALL,OUTRES,ALL,ALL,SOLVEFINISH!画出第一阶振型图/POST1SET,LISTSET,1,1$PLDISP!BRB_2模型FINISH/CLEAR,ALL/FILNAME,BRB_2/TITLE,AnalysisforBRB_2/REPLOT/PREP7!屈曲约束支撑高度L=3000R1=92$T1=15R2=100$T2=8Ml=200!过渡段长度T=10R3=88T3=ll!芯材单元ET,l,SOLIDl85MP,EX,l,2.06E5$MP,PRXY,l,0.3!外套筒单元ET,2,SOLID45MP,EX,2,2.06E5$MP,PRXY,2,0.3!定义BRB截面TYPE,lMAT,lCYLIND,Rl-Tl,Rl,0,L!芯材截面,芯材厚度为l5mmTYPE,2MAT,2CYLIND,R2-T2,R2,Ml,L-Ml,,!建立外套筒截面,外套筒厚度为8mm!划分网格VSEL,ALLESIZE,20VSWEEP,ALLALLSEL,ALL!定义芯材和外套筒接触单元!*建立目标单元ET,3,TARGEl70!*建立接触单元ET,4,CONTAl74MP,MU,4,0keyopt,4,1,0!选择自由度ux,uy,uzkeyopt,4,2,0!接触算法设为扩充的拉格朗日算法!!定义芯材的约束条件!底部约束为固支CSYS,0NSEL,S,LOC,Z,0D,ALL,UX,0,,,,UY,UZALLSEL,ALL!芯材在外套筒外的约束径向约束CSYS,1NSEL,S,LOC,X,R1CSYS,0NSEL,R,LOC,Z,0,M1,,D,ALL,UX,0,,,,UYCSYS,1NSEL,S,LOC,X,R1CSYS,0NSEL,R,LOC,Z,L-M1,L,,D,ALL,UX,0,,,,UYALLSEL,ALLFINISH/SOLUANTYPE,STATICPSTRES,ONCSYS,0ASEL,S,LOC,Z,LSFA,ALL,,PRES,1,SOLVEFINISH/SOLUANTYPE,BUCKLEBUCOPT,LANB,5MXPAND,5,,,,YES,!设置求解输出OUTPR,BASIC,ALL,OUTRES,ALL,ALL,SOLVEFINISH!画出第一阶振型图/POST1SET,LISTSET,1,1$PLDISPkeyopt,4,4,0!在高斯点上搜索接触对keyopt,4,5,3!不考虑初始节点闭合以及接触面平移效应的自动调整keyopt,4,7,0!不进行单元水平上的时间增量控制keyopt,4,8,0!不进行非对称接触选择keyopt,4,9,2!不考虑初始渗透或间隙效应keyopt,4,10,l!设置contal73的接触刚度更新基于上一子步的平均应力keyopt,4,11,0!不计壳厚效应keyopt,4,12,2!标准的接触面接触行为!*建立目标面MP,MU,1,0!定义接触摩擦MP,MU,3,0TYPE,1MAT,1CSYS,1ASEL,S,LOC,X,R1CM,_TARGET,AREAtype,3NSLA,S,1ESLN,S,0esurf,all,ALLSEL,ALL!*建立接触面CSYS,1T