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The element deformation results recorded by using Uniform Excitation and Multi-Support Excitation are quite different,What is the reason?

When I perform dynamic analysis, the ground motion is small，but it is not zero.The model does not converge. If the ground motion before the model does not converge is set to zero, it can converge, and the error is reported as follows： current EnergyIncr: -nan(ind) (max: 1e-06) Norm deltaX: nan, Norm...

If I use KrylovNewton's algorithm and iterate with initial, how do I call it？

Hello I've downloaded mpich2 and OpenSeesMP, they work separately, but can't call them like mpiexec -np 3 OpenSeesMP.exe Example.tcl. It will appear [unset]: unable to decode hostport from 51020 Abort(1091087) on node 0 (rank 0 in comm 0): Fatal error in PMPI_Init: Other MPI error, error stack: MPIR...

Is it reasonable that there is a great difference in the bending moment of two nodes in the sameelement?

I know a singular section stiffness matrix.However how to deal with exactly?

Hi,I am a new user. I am using the following code wipe; puts "system" model basic -ndm 3 -ndf 6 puts "restraint" if {[file exists output]==0} { file mkdir output; } #Cap beam node node 77 30 -4 -2.3 node 78 30 -3.5 -2.3 node 79 30 -3 -2.3 node 80 30 -2.4 -2.3 node 81 30 -2 -2.3 node 82 30 -1.5 -2.3 ...