HD: Switched to an equivalent but numerically more reliable expression for the hydrostatic moment on (partially wetted) circular endplates#2941
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andrew-platt merged 2 commits intoOpenFAST:rc-4.1.2from Aug 4, 2025
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…n for the hydrostatic moment on (partially wetted) circular endplates
…static load calculations.
andrew-platt
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Aug 4, 2025
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Approving after our conversation about the method of derivation (I haven't verified it myself).
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This PR is ready to be merged.
Feature or improvement description
The previous expression for the hydrostatic moment on a circular member endplate can occasionally give inaccurate/incorrect results due to a numerical precision problem caused by dividing a number that is very close to zero. This PR replaces the old expression with an equivalent but more reliable one that completely avoids the possibility of division by zero.
Impacted areas of the software
HydroDyn
Test results, if applicable
No change to existing test results.