The OpenSees Community

Hello everyone, I'd like to share an experimental dll which allows to calculate participation factors and perform a Response Spectrum Analysis (RSA). It currently supports the three translational dofs X Y Z. Follow the link http://www.nextfem.it/it/opensees-tools/ : here you can find 32bit and 64bit...

Hi fmk, I'd like to ask if it is possible to access the shared variables declared in commands.cpp (e.g. theAnalysisModel, theEigenSOE, etc) from a user written external dll. If not, is it possible for you to extend the dll interface function setGlobalPointers, including the changes in the official r...

Wow thanks for the quick response! I changed the code as you suggested, but all I get is a RunTime Error (unless you meant this as a result of the matrix being singular). I've sent you the fixed script and a screenshot... maybe you can give me an insight into what's going on. Any help is greatly app...

Ok, I've just sent you an email (to <fmckenna(at)ce.berkeley.edu>) with the script.
Object: Eigen model - UmfPack.

Thanks

Thanks fmk for your reply. I tried to change LVALUE but nothing changed.

Hi there, I'm having the same problem. Creating an UmfPack system brings to this: UMD2FA: LVALUE too small! Must be greater than 21813626 WARNING UmfpackGenLinSolver::solve(void)- -4 returned in factorization UMD2FA() Unfortunately changing the LVALUE flag to 21813626 will terminate OpenSees as the ...

Ok, I figured it out. The reference line should be something like: element ElasticTimoshenkoBeam3d $tag $iNode $jNode $E $G $A $Jx $Iy $Iz $Avy $Avz $transfTag <-rho $rho> <-nlGeo> <-cMass> the transfTag was missing. By the way I expected to get this string by typing "element ElasticTimoshenkoBeam" ...

Hi there everybody! I was trying out this new beam element given with 2.4.3 but I can't make it work as I get the following error: OPS_GetIntInput -- error reading 13 WARNING invalid element data (transTag) element ElasticTimoshenkoBeam3d 1 TclElementCommand -- unable to create element of type : Ela...

Ok, thanks! I'll look into it.

Thanks for the reply!
I think I'll opt for obtaining double* data and using the blas libraries... they should be quite optimized by themselves.

Hello everyone! I'm writing some C++ code that calculates participation factors and therefore uses matrix and vector multiplications. The point is that the operations coded in Vector.cpp and Matrix.cpp take quite a long time to complete when the model is defined by 500+ nodes and elements. Is there ...