Beam_Deflection.zip (697.8 KB)

Hello, everyone:

The above is a test procedure I did. The problem is that one end of the cantilever is fixed, and the other end is subject to a concentrated force. Its section is rectangular. The RBDO design is used to find the minimum cross-sectional area which does not exceed the allowable beam deflection. Beam_RBDO is calculated according to the analytic formula and can be run successfully.

I simulated this problem with abaqus to calculate its deflection, and then made a myUQLinkModel model with UQLink module as the limit state function in RBDO, that is, to replace the role of uq_Constriant. I think there is no problem with the other codes, but there is an error in the calculation. I don’t know why, can you help me to answer it?