Ansys error help
Ansys error help
(OP)
Hi all,
I'm doing a fluid structure interaction problem using Ansys 9.0. I'm getting a strange error, "The inversion subroutine was supplied with a singular matrix". what does that mean ??? i tried modifying almost everything. in the output window the last message is ... "applying boundary conditions" and immediately after that "The inversion subroutine was supplied with a singular matrix". what is wrong ????
any help would be grateful.
thanks a lot
Alphaden
I'm doing a fluid structure interaction problem using Ansys 9.0. I'm getting a strange error, "The inversion subroutine was supplied with a singular matrix". what does that mean ??? i tried modifying almost everything. in the output window the last message is ... "applying boundary conditions" and immediately after that "The inversion subroutine was supplied with a singular matrix". what is wrong ????
any help would be grateful.
thanks a lot
Alphaden





RE: Ansys error help
RE: Ansys error help
this is true. and when I do the analyses separately .. both of them run fine. but while performing FSI (combining both together) it fails. I have also considered structural disp. BCs for fluid for FSI which otherwise I would never consider if I was to do CFD all alone. but still failure is what I end up in !! but I'll try different approach for BCs. and let you know if it works.
thanks again,
alphaden
RE: Ansys error help
you could try to run a modal analysis on the struct part of your model alone, in order to see if there are rigid-body modes (i.e. unconstrained fundamental DOF of your system) and gather info about which they are, if any.
Regards