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Hello As per Opensees way of working, I am provided Load Control or Displacement Control Integrators only for Static Problems. For Dynamic Ones I need to use something like Newmark. However if I'm not mistaken Newmark is kind of an integration scheme to build up response at t+dt from the current res...

The band storage process as per lapack documentation points to storing of the A matrix(of AX=B) as another compacted matrix. Quoting from the lapack documentation - "An m-by-n band matrix with kl subdiagonals and ku superdiagonals may be stored compactly in a two-dimensional array with kl+ku+1 ...

I see that a section of member functions of FE_Element Class - the ones pasted below are expected to be used for element by element solution strategies. I want to know where(in which class) is the element by element strategy implemented since integrators seem to implement the standard full matrix K*...

It seems most of the Opensees FE formulation for getting the matrices and vectors is following from Frank Mckenna's Thesis Section 3.2 of thesis-Object-Oriented Finite Element Programming: Frameworks for Analysis, Algorithms and Parallel. But is there any further reference on this way of doing thing...

Could appreciate the OOP but was exasperated finding out from where the call to getEleTang() is going through. Your explanation cleared it up.

Thanks frank!!

Am trying to trace the sequence of events happening during a linear/nonlinear analysis. In the Integrator subclasses, there is a method formEleTangent() which forms the tangent matrix after iterating all over the elements(similar method for nodes). However all solution algorithm methods in EquisolnA...