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1、1、程序分析時報錯可能的原因?輸出結果如下:>ENTRYLOAD_BLOCK>ENTRYASSM_STIFF_LOAD(FORMGLOBALEQUILIBRIUMEQUATIONSINBLOCKS)>Inclass[MultifrontalSolver]:FactorizationfailedinDSYTRFINCOMPLETEMULTI-FRONTALSOLVER>IERROR=-1>不正常的執(zhí)行中斷!1)問題分析:出現(xiàn)如上提示時,最常見的原因是模型中出現(xiàn)了不確定的剛體位移。在分析中必須對模型中所有的節(jié)點都定義足夠的約束條件,以保證它們在各個平移和轉動自由度上都
2、不會出現(xiàn)不確定的剛體位移。2)類試問題A-桁架單元不能受彎,而在模型中沒有約束它的轉動自由度,就出現(xiàn)了不確定位移值。B-施加接觸單元后因為分割節(jié)點,導致分割產生的節(jié)點沒有約束條件,也會出現(xiàn)不確定位移值。C-單元異常,例如單元過度變形D-應力應變關系中有負斜率2、程序計算不收斂可能的原因?輸出結果如下:X-COORDINATEOFC.G....:1.49753E+01MY-COORDINATEOFC.G....:1.50000E+01MZ-COORDINATEOFC.G....:1.12137E+01MINCREMENTNO.:1ITERATIONNO.:1LOAD
3、FACTOR:0.100E+01DISPL.NORM:0.478E-02INCREMENTNO.:1ITERATIONNO.:2LOADFACTOR:0.100E+01DISPL.NORM:0.516E-02INCREMENTNO.:1ITERATIONNO.:3LOADFACTOR:0.100E+01DISPL.NORM:0.249E-01INCREMENTNO.:1ITERATIONNO.:4LOADFACTOR:0.100E+01DISPL.NORM:0.165E-01INCREMENTNO.:1ITERATIONNO.:5LOADFACTOR:0.100E
4、+01DISPL.NORM:0.953E-02INCREMENTNO.:1ITERATIONNO.:6LOADFACTOR:0.100E+01DISPL.NORM:0.318E+02INCREMENTNO.:1ITERATIONNO.:7LOADFACTOR:0.100E+01DISPL.NORM:0.300E+00INCREMENTNO.:1ITERATIONNO.:8LOADFACTOR:0.100E+01DISPL.NORM:0.353E+00INCREMENTNO.:1ITERATIONNO.:9LOADFACTOR:0.100E+01DISPL.NORM
5、:0.847E-01INCREMENTNO.:1ITERATIONNO.:10LOADFACTOR:0.100E+01DISPL.NORM:0.133E+00INCREMENTNO.:1ITERATIONNO.:11LOADFACTOR:0.100E+01DISPL.NORM:0.715E-01INCREMENTNO.:1ITERATIONNO.:12LOADFACTOR:0.100E+01DISPL.NORM:0.964E-01INCREMENTNO.:1ITERATIONNO.:13LOADFACTOR:0.100E+01DISPL.NORM:0.629E-0
6、1INCREMENTNO.:1ITERATIONNO.:14LOADFACTOR:0.100E+01DISPL.NORM:0.324E-01INCREMENTNO.:1ITERATIONNO.:15LOADFACTOR:0.100E+01DISPL.NORM:0.454E+01INCREMENTNO.:1ITERATIONNO.:16LOADFACTOR:0.100E+01DISPL.NORM:0.385E+00INCREMENTNO.:1ITERATIONNO.:17LOADFACTOR:0.100E+01DISPL.NORM:0.164E+00INCREMEN
7、TNO.:1ITERATIONNO.:18LOADFACTOR:0.100E+01DISPL.NORM:0.111E+00INCREMENTNO.:1ITERATIONNO.:19LOADFACTOR:0.100E+01DISPL.NORM:0.512E+02INCREMENTNO.:1ITERATIONNO.:20LOADFACTOR:0.100E+01DISPL.NORM:0.269E+00INCREMENTNO.:1ITERATIONNO.:21LOADFACTOR:0.100E+01DISPL.NORM:0.151E+00INCREMENTNO.:1ITE
8、RATIO