Learning Forum

[Fazalul Chemban]

I am facing two kind of errors while solving.

1) Error in SVD

2) Error related to internal constraint equation. Could you please help me to select the internal constrant equation based on number in ansys mechanical.

Kindly help to resolve the issue.

[Fazalul Chemban]

 

I kindly request ansys employees to comment on this error.

 

[Ashish Khemka]

Hi, by SVD are you referring to  singular value decomposition? Also for second error - are you applying displacement directly at a location where there is a constraint equation (say a remote force etc.)?

Regards,

Ashish Khemka

[Fazalul Chemban]

 

Based on my understanding it would be singular value decomposition. Initially, I thought it would be error corresponding to calculation related to solver and tried different solvers but it didn’t helped. Do you have any solutions for SVD error, I will try executing.

I am doing modal analysis and not applying any displacement directly at a location where constraint equations are applied. I kindly request to suggest resolution at the earliest as my deadline is very tight. Thanks for your help.

 

[dlooman]

There is no prior report of this error in our call tracking system which goes back over 10 years.  It does seem to be a fundamental modal solver error.  To determine the node numbers associated with an internal constraint equation issue the command celist,,,,conv immediately after the solve command and then save the database.  celist,,,,conv converts the internal constraint equations into external constraint equations which can be listed with celist,,,,conv.  If you are able to create a service request for this that would be desirable.