Topology optimization after Response Spectrum Analysis

Hi TIm,

Have you requested for FRF displacements in your model?

Please request displacements (refer OS-2095: Frequency Response Optimization of a Rectangular Plate) and use FRF displacement as a response and check if you are able to run the model without errors.

if you still face the error, please share the model with us using the dropbox link in the below signature.

Thanks for the reply Prakash, it still doesn't work using FRF displacement so I've sent the file.

Hi  Tim_

Thanks for sharing the file. I will look into this and will get back to you ASAP!! /emoticons/default_smile.png' alt=':)' srcset='/emoticons/smile@2x.png 2x' width='20' height='20'>

HI,

Instead of FRF displacement can you use RMS displacement as a response or change the analysis type to FRF if you want to use FRF displacement?

HI,

 

Instead of FRF displacement can you use RMS displacement as a response or change the analysis type to FRF if you want to use FRF displacement?

Thanks for the help. Yes I can chance the analysis type to FRF and run an analysis but that doesn't permit me to get out the peak response as a response spectrum analysis does.

In terms of the RMS displacement, I would need a randps load collector but it's unclear to me what that does. The Bulk data section is not very helpful to find that out, could you explain a bit more how this would work?

Hi TIm,

RANDPS should point to TABRND1 which contains the PSD (load Vs frequency). Please refer to the tutorial OS-1325: Random Response Analysis of a Flat Plate