Preloading using nonlinear results for frequency response

Hello everyone,

 

I would like to ask for an advice in solving a frequency response problem on a preloaded structure.  

 

I create two load cases in a single job.

The first load case selects nonlinear Quasi-Static (NLSTAT)

the second load case selects freq.resp(direct) ,for substate(preload) ,select the first loadstep.

set  PARAM,LGDISP,1

 

Unfortunately,the solver gives an error:

 *** ERROR # 4754 ***

 STATSUB(PRELOAD) of subcase 2 points to a nonlinear subcase with large displacement, which is not supported.



 

 

 

Best regards,

 

young