Error in job Job-1: Three factorizations in a row failed. Check the model. It is possible that the model contains the kinematic coupling definition set up in a way that a degree of freedom has neither mass nor stiffness.

某个自由度刚度缺失了，你设置可能有问题

问题解决了，划分网格时，选择按边划分，每个桁架单元只能设置一个种子