Comments (1)
Static condensation is used to account for member end releases. We start with the typical member stiffness matrix and fixed end reaction vector, and then we condense out any "released" degrees of freedom the user has specified.
You don't need to be concerned with any of these matrices unless you want to verify them for yourself. I've built simple wrappers around the object model to keep the user's interaction with matrices to a minimum. For example, the "FEModel3D.DefineReleases()" method will tell PyNite to take care of condensing the matrices so you don't have to deal with it.
fer() is the member's local fixed end reaction vector. I've adopted the notation of using capital letters for global matrices, and lower case letters for local matrices. If no end releases have been defined, fer() and __fer_Unc() return the same vector.
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Related Issues (20)
- Implement rotational springs? HOT 3
- Discontinuities in moment, deflection diagrams HOT 8
- Cannot create PDF report HOT 2
- Post-processing - analysis fails for two span beams HOT 2
- Define hinge at a member HOT 2
- What is "matrix is singular" error? HOT 4
- FR: Make Matplotlib optional HOT 2
- Error Creating Members with Aux Nodes HOT 4
- CylidnerMesh origin wrong when not using axis='Y' HOT 5
- Reaction force - Equilibrium problem HOT 18
- Rotational Symmetry HOT 3
- Incorrect (Zero) Reaction Observed in Z-Direction for Cantilevered Beam with Spring Supports HOT 4
- 'Quad3D' object has no attribute 'LoadCombos' HOT 2
- RuntimeWarning: divide by zero encountered in double_scalars HOT 2
- Displacement Memory Growth & Purge Option + Disk Caching of Displacements HOT 3
- P-Delta Member Internal Results Incorrect HOT 1
- PyNite Import Issue HOT 3
- Tension-only members HOT 3
- Issue initalising PhysMember HOT 3
- Variable cross-section along member HOT 1
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