Modal damping#3147

Draft

JustinPorter88 wants to merge 28 commits intoOpenFAST:dev-tcfrom

JustinPorter88:modal-damping

Commits on Dec 19, 2025

Initial construction of K,M for modal damping init.
JustinPorter88
committed

Commits on Dec 22, 2025

Eigenanalysis moved to NWTC_Num for reuse in beamdyn modal damping. BD calculation matches openfast toolbox and analytical frequencies for cantilever.
JustinPorter88
committed
Construction of damping matrix in rotating frame and clean-up.
JustinPorter88
committed

Commits on Dec 30, 2025

Commits on Dec 31, 2025

Fixing index issues for modal damping transforms.
JustinPorter88
committed

Commits on Jan 2, 2026

Commits on Jan 6, 2026

Commits on Jan 7, 2026

Switching to alternative coordinate transforms and now is consistent for IEA 22 MW example with mu damping.
JustinPorter88
committed

Commits on Jan 8, 2026

Commits on Jan 9, 2026

Revert change to BD modal damping node vector calculation
deslaughter
committed