HD: Initialization of the low-pass-filtered displacements of potential-flow bodies when ExctnDisp = 2 #2341
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…bodies (ExctnDisp=2) based on the ElastoDyn initial condition
…sitions of potential-flow bodies based on user PRP input
… bodies if ExctnDisp=2 to avoid writing to unallocated arrays
andrew-platt
approved these changes
Jul 22, 2024
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Feature or improvement description
This PR allows HydroDyn to automatically initialize the low-pass-filtered surge and sway displacements of potential-flow bodies based on either the driver PRP motion input if running HydroDyn standalone or based on the initial platform position from ElastoDyn when running OpenFAST. This change only affects the solution when
ExctnDisp = 2. This is helpful if the simulation starts with a large platform displacement from the origin. Previously, HydroDyn always initialize the low-pass-filtered displacements to zero.Impacted areas of the software
Glue-codes and HydroDyn
Test results, if applicable
All existing tests with
ExctnDisp = 2all start from zero platform displacement, so this PR has no effect.