*** ERROR # 312 ***
In static load case 1
the compliance is negative or large 4.82558e+013.
Optimization/buckling analysis cannot be performed.
due to possible rigid body mode.
FEASIBLE DESIGN (ALL CONSTRAINTS SATISFIED).
*** SOME ERRORS WERE REPORTED DURING THE RUN,
*** PLEASE VERIFY RESULTS AS THEY MAY BE INVALID.
本模型是大客车的车身骨架拓扑优化，约束和连接都没问题，看其他的材料有说是弹簧没有建好，网格划分的不是很好，节点不重合，本模型没有模拟悬架，是不是这方面出现问题，网格划分的没问题，节点不重合又是什么意思，怎么处理呢？