The Siemens Community Catalyst program was co-created with our community to acknowledge technology leaders who consistently contribute to the Siemens Community. Nominations are accepted on a rolling basis.
good morning every body
I'm conducting a FRF analysis and i have this failure message.
*** ERROR # 735 *** Negative modal damping obtained from TABDMP1.
what does it means? how could i fix this?
Hello Luca,
This is probably related to the extrapolated values found in the frequency range not defined by you directly in TABDAMP1. For example, your damping curve goes only up to 200Hz and your modal space up to 600Hz and when OptiStruct extrapolates the damping curve to 600Hz, it finds negative values. Try to add one extra line in the TABDMP1 curve covering higher frequencies and setting a positive damping value and the model should work fine.
Thanks,Vinicius
Thank you so much
Could it be related to the amount of eigenvalue i've asked him to compute in relation to the frequency band my tab cover?
Yes, try to extend your tab up to the highest frequency in your eigenvalues extraction.
Join us for a community conversation on how High-Performance Computing (HPC) and Simcenter PSIM work together to meet the increasing demands of modern power electronics simulation. During this one-hour technical session, you'll discover how leveraging HPC can speed up simulations, improve scalability, and empower engineers…
Join us for a community conversation on accelerating your motor simulation workflow with Simcenter Simlab. In this beginner-friendly session, we'll introduce the platform's automated model-building capabilities and show how easy it is to set up your first electric motor analysis. You'll see the basic steps of geometry…
Join us for a Community Conversation where we'll discuss practical approaches to analyzing complex electromagnetic models using hybrid solver techniques. This session will provide a general overview of how different computational methods can be combined within a single simulation to address models containing varied…
