Op^3 (OptumGX-OpenSeesPy-OpenFAST) integrated numerical modeling framework for offshore wind turbines. 11 examples (NREL 5MW + IEA 15MW + Gunsan + 4 isolation tests + 2 jackets), 33/33 analyses passing, fully open-source path with industry-standard 6x6 stiffness formulas (DNV, ISO, API, OWA).
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