麻烦大家指导下~~~~

ABAQUS模拟杆件系统中，一个杆两段均设置非线性轴向连接器，一开始就不收敛算不过去。尝试过一端连接器，一段MPC-tie连接可以收敛，希望大神指导下~~

错误警告：

One or more thickness of the box section is greater than 0.1 of the cross section dimension. The torsional rigidity may not be evaluated accurately since the calculation is based on the assumption that the wall thickness is much small in comparison to the cross section dimension

Strain output request le is not valid for some elements in this analysis. This request is switched to the strain measure, e.

Output request pe is not available for element type conn3d2

Strain output request le is not valid for some elements in this analysis. This request is switched to the strain measure, e.

Nodes 1 instance cgan-2 and 17 instance hengliang-1 in the tie mpc are not coincident. The mpc will constrain rotational rigid-body motion between the nodes. Interpret results with caution or consider substituting a beam or link mpc.

Solver problem. Zero pivot when processing D.O.F. 3 of 1 nodes. The nodes have been identified in node set WarnNodeSolvProbZeroPiv_3_1_1_1_1.

A CONNECTOR TYPE AXIAL IS USED IN A  GEOMETRICALLY LINEAR ANALYSIS. EXTRA CARE MUST BE EXERCISED IN INTERPRETING KINEMATIC OUTPUT VARIABLES (SUCH AS CU, CP, etc.) ASSOCIATED WITH THIS ELEMENT. AS A CONSEQUENCE, CONNECTOR STOPS/LOCKS AND KINETIC BEHAVIOR FOR THIS ELEMENT MAY BE DIFFICULT TO INTERPRET.

Solver problem. Zero pivot when processing D.O.F. 3 of 1 nodes. The nodes have been identified in node set WarnNodeSolvProbZeroPiv_3_1_1_1_2.