这几天一直在算环形盘的瞬态响应问题,在内圈施加的约束,可是为什么总是说:
*** WARNING *** CP = 4.359 TIME= 20:04:10
No constraints have been defined using the D command.
*** WARNING *** CP = 6.078 TIME= 20:04:12
No constraints have been defined using the D command.
*** WARNING *** CP = 7.547 TIME= 20:04:14
No constraints have been defined using the D command.
很是搞不明白,那位同志可以帮忙给点意见啊?