@geardyn-1 I want moment, not force. *DATABASE_NODFOR can only output force.

Also, CONSTRAINED_EXTRA_NODE needs to be used instead of CNRB

Thank you very much for your suggestion, after a series of numerical simulation attempts, I found that using BOUNDARY_PRESCRIBED_MOTION_RIGID outputs ...

I want the reaction moments at the CNRB nodes, but as shown below, with the keyword BOUNDARY_PRESCRIBED_MOTION (including rigid), the reaction forces ...