如何解决ANSYS Workbench中大型空间桁架的约束问题 ？ 66
用AWB分析一大型空间屋盖结构，在求解时出现以下错误：
A solver pivot warning or error has been detected in the UX degree of freedom of node 4776 located in Geom-1_beams. This is usually a result of an ill conditioned matrix possibly due to unreasonable material properties, an under constrained model, or contact related issues. Check results carefully. You may select the offending object and/or geometry via RMB on this warning in the Messages window.
*** ERROR *** CP = 2.062 TIME= 17:17:43
There is at least 1 small equation solver pivot term (e.g., at the UX
degree of freedom of node 4776). Please check for an insufficiently
constrained model.
初步以为是杆件节点的连接有问题，但在Spaceclaim中检查后各节点连接均没有问题。改变多种约束方式依然提示上述错误。
以下是AWB工程文件（ANSYS 18版本），希望前辈们能够指导下，十分感谢
