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xiexie165新虫 (初入文坛)
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[求助]
求教 ansys模型做“自由落体”结果中 模型的加速度却持续增加？
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模型是一个压电悬臂梁模型，让其做自由落体的瞬态分析，但在时间后处理的结果中加速度不是恒等于-9.8m/s^2，而是在持续增加，增到几十g的。。。不知为何，求大神解答。 以下是命令流，不知道那个地方出问题了： !分析模块 /COM, /COM,Preferences for GUI filtering have been set to display: /COM, Structural /COM, Electric !预处理 /PREP7 !定义单元、材料 et,1,solid5 KEYOPT,1,1,3 mp,dens,1,7.5e3 mp,perx,1,1700 mp,pery,1,1700 mp,perz,1,1470 tb,anel,1 tbdata,1,12.6e10,7.95e10,8.41e10,0,0,0 tbdata,7,12.6e10,8.41e10,0,0,0 tbdata,12,11.7e10,0,0,0 tbdata,16,2.35e10,0,0 tbdata,19,2.30e10,0 tbdata,21,2.30e10 tb,piez,1 tbdata,1,0,0,-6.55 tbdata,4,0,0,-6.55 tbdata,7,0,0,23.3 tbdata,10,0,0,0 tbdata,13,0,17.0,0 tbdata,16,17.0,0,0 et,2,solid185 mp,dens,2,2.7e3 mp,ex,2,7.17e10 mp,prxy,2,0.33 et,3,solid185 mp,dens,3,11.3e3 mp,ex,3,1.7e10 mp,prxy,3,0.42 !建模 !梁体-1 BLOCK,0,0.03,0,0.12,0,3e-4, !梁体-2 BLOCK,0,0.03,0.12,0.13,0,3e-4, !上压电片 BLOCK,0,0.03,0,0.12,3e-4,5e-4, !下压电片 BLOCK,0,0.03,0,0.12,0,-2e-4, !质量块-下 BLOCK,0,0.03,0.13,0.14,0,3e-4, !质量块 BLOCK,0,0.03,0.13,0.14,3e-4,2.07e-3, !粘贴体 FLST,2,6,6,ORDE,2 FITEM,2,1 FITEM,2,-6 VGLUE,P51X !定义网格属性 FLST,5,2,6,ORDE,2 FITEM,5,7 FITEM,5,8 CM,_Y,VOLU VSEL, , , ,P51X CM,_Y1,VOLU CMSEL,S,_Y CMSEL,S,_Y1 VATT, 1, , 1, 0 CMSEL,S,_Y CMDELE,_Y CMDELE,_Y1 FLST,5,3,6,ORDE,3 FITEM,5,1 FITEM,5,9 FITEM,5,10 CM,_Y,VOLU VSEL, , , ,P51X CM,_Y1,VOLU CMSEL,S,_Y CMSEL,S,_Y1 VATT, 2, , 2, 0 CMSEL,S,_Y CMDELE,_Y CMDELE,_Y1 FLST,5,1,6 FITEM,5,11 CM,_Y,VOLU VSEL, , , ,P51X CM,_Y1,VOLU CMSEL,S,_Y CMSEL,S,_Y1 VATT, 3, , 3, 0 CMSEL,S,_Y CMDELE,_Y CMDELE,_Y1 !画网格 FLST,5,32,4,ORDE,16 FITEM,5,1 FITEM,5,-8 FITEM,5,29 FITEM,5,-32 FITEM,5,37 FITEM,5,-40 FITEM,5,81 FITEM,5,-84 FITEM,5,65 FITEM,5,-68 FITEM,5,85 FITEM,5,-88 FITEM,5,14 FITEM,5,19 FITEM,5,50 FITEM,5,55 CM,_Y,LINE LSEL, , , ,P51X CM,_Y1,LINE CMSEL,,_Y LESIZE,_Y1,5e-4, , , , , , ,1 FLST,5,20,4,ORDE,10 FITEM,5,9 FITEM,5,-12 FITEM,5,23 FITEM,5,24 FITEM,5,59 FITEM,5,60 FITEM,5,73 FITEM,5,-80 FITEM,5,89 FITEM,5,-92 CM,_Y,LINE LSEL, , , ,P51X CM,_Y1,LINE CMSEL,,_Y LESIZE,_Y1,1e-4, , , , , , ,1 FLST,5,6,6,ORDE,3 FITEM,5,1 FITEM,5,7 FITEM,5,-11 CM,_Y,VOLU VSEL, , , ,P51X CM,_Y1,VOLU CHKMSH,'VOLU' CMSEL,S,_Y VMESH,_Y1 CMDELE,_Y CMDELE,_Y1 CMDELE,_Y2 !耦合上下面电压自由度 NSEL,S,LOC,Z,5e-4 NPLOT NSEL,A,LOC,Z,-2e-4 NPLOT NSEL,R,LOC,Y,0,12e-2 NPLOT FLST,4,29402,1,ORDE,4 FITEM,4,58805 FITEM,4,-73505 FITEM,4,88207 FITEM,4,-102907 CP,1,VOLT,P51X ALLSEL,ALL VPLOT FINISH !分析 /SOL !瞬态分析 ANTYPE,4 TRNOPT,FULL LUMPM,0 NSUBST,100,0,0 OUTRES,ERASE OUTRES,ALL,1 TIME,10 TINTP,'',0.25,0.5 !加重力 ACEL,0,0,9.8, !求解 /REPLO /STATUS,SOLU SOLVE SAVE |
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