用质量-弹簧单元模拟车桥耦合时程分析问题
本帖最后由 yaoyaomao 于 2012-3-16 11:23 编辑建立箱型梁模型，用shell63单元划分网格，梁两端简支约束。想用生死单元法模拟列车通过桥梁。所以在梁上部0.5m处建了mass21单元(6个自由度，竖直方向上定义mass值)，与箱型梁顶板相应节点连接，建立弹簧单元combin14（3维）.
*** WARNING *** CP = 372.750 TIME= 21:36:34
There are 186 small equation solver pivot terms.
*** WARNING *** CP = 374.953 TIME= 21:36:37
The calculated reference FORCE CONVERGENCE VALUE = 0 is less than 1E-2
a threshold zero, A value of 1E-2 or specified MINREF is used.Check
results carefully.
结果里，位移全部为0.
应该怎么解决呢。
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