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。