我做加筋结构的稳定性问题,使用shell181和beam188单元,他们应该是可以自动耦合的,而且我划分完网格之后也使用了合并节点的命令,现在遇到的问题就是我使用静力分析时板壳结构形变一点问题都没有,但是用同样的模型进行屈曲分析时只有板变形,梁单元一点都不动,我想问您一下这个是ansys显示的问题还是我建模本身的问题?
另外我使用相同的方法建立加筋板模型,静力分析筋条和板可以一起运动,可是屈曲分析筋就和板分离了,以下是命令流,希望高手能帮我解答这个难题!万分感激!
下边这个命令流做的是一个静力分析,板的一端固支,另一端线中点有一个垂直于板的集中力作用,查看results Viewer里的变形动画,可以看到筋条和板共同形变。 /PREP7 ET,1,BEAM188 ET,2,SHELL181 MPTEMP,,,,,,,, MPTEMP,1,0 MPDATA,EX,1,,7e10 MPDATA,PRXY,1,,0.3 SECTYPE, 1, BEAM, RECT, , 0 SECOFFSET, CENT SECDATA,0.02,0.15,0,0,0,0,0,0,0,0 sect,2,shell,, secdata, 0.002,1,0.0,3 secoffset,MID seccontrol,,,, , , , SECTYPE, 1, BEAM, RECT, , 0 SECOFFSET, CENT SECDATA,0.002,0.015,0,0,0,0,0,0,0,0 k,1 k,2,0.1 k,3,,0.1 k,4,0.1,0.1 a,1,3,4,2 wpro,,90 wpoff,0,0,-0.05 ASBW,all LSEL,,,,7 LATT,1,,1,,,,1 LESIZE,7,,,10,,,,,1 LMESH,7 ASEL,,,,all AATT,1,,2,0,2 AESIZE,all,0.01, AMESH,all FINISH /SOL ALLSEL FLST,2,2,4,ORDE,2 FITEM,2,5 FITEM,2,8 /GO DL,P51X, ,ALL, FLST,2,1,3,ORDE,1 FITEM,2,6 /GO FK,P51X,FZ,-1000 /SHRINK,0 /ESHAPE,1.0 /EFACET,1 /RATIO,1,1,1 /CFORMAT,32,0 /STATUS,SOLU SOLVE 下边这命令流做的是屈曲分析,板一端固支,另一端有板面内均布的轴向压力作用,最后查看results Viewer里的变形动画,里边筋条不运动 但是感觉对板还起到一点约束的作用 /PREP7 ET,1,BEAM188 ET,2,SHELL181 MPTEMP,,,,,,,, MPTEMP,1,0 MPDATA,EX,1,,7e10 MPDATA,PRXY,1,,0.3 SECTYPE, 1, BEAM, RECT, , 0 SECOFFSET, CENT SECDATA,0.02,0.15,0,0,0,0,0,0,0,0 sect,2,shell,, secdata, 0.002,1,0.0,3 secoffset,MID seccontrol,,,, , , , SECTYPE, 1, BEAM, RECT, , 0 SECOFFSET, CENT SECDATA,0.002,0.015,0,0,0,0,0,0,0,0 k,1 k,2,0.1 k,3,,0.1 k,4,0.1,0.1 a,1,3,4,2 wpro,,90 wpoff,0,0,-0.05 ASBW,all LSEL,,,,7 LATT,1,,1,,,,1 LESIZE,7,,,10,,,,,1 LMESH,7 ASEL,,,,all AATT,1,,2,0,2 AESIZE,all,0.01, AMESH,all FINISH /SOL ALLSEL FLST,2,2,4,ORDE,2 FITEM,2,5 FITEM,2,8 /GO DL,P51X, ,ALL, FLST,2,2,4,ORDE,2 FITEM,2,6 FITEM,2,9 /GO SFL,P51X,PRES,1, /STATUS,SOLU SOLVE FINISH /SOLU ANTYPE,1 BUCOPT,LANB,10,0,0, /STATUS,SOLU SOLVE
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