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MD: ramp inertial loads during startup transients #2280
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andrew-platt
merged 6 commits into
OpenFAST:dev
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andrew-platt:f/MD_rampInertialLoads
Jul 8, 2024
Merged
MD: ramp inertial loads during startup transients #2280
andrew-platt
merged 6 commits into
OpenFAST:dev
from
andrew-platt:f/MD_rampInertialLoads
Jul 8, 2024
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RyanDavies19
referenced
this pull request
in RyanDavies19/MoorDynC_ryan
Jun 25, 2024
Add intertialF_rampT as input option
Ramp inputs added as optional inputs in the
Documentation updated here: https://moordyn.readthedocs.io/en/latest/inputs.html#id4 |
All looks good on my end, thanks for putting this together. Glad it is helping with the start-up transient problem. |
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This is a draft PR so that I don't lose track of it.
Feature or improvement description
When the inertial loads are used in the MoorDyn loads and moments returned to OpenFAST, the simulation may fail immediately due to very large loads from MD during the initial transients. One method to get around this is by adding a ramping of the inertial loads in MD. This PR adds a 30 second ramp time (arbitrarily chosen ramp time, hard coded in the MD registry for now).
@RBergua is testing this feature.
Related issue, if one exists
Impacted areas of the software
MoorDyn
Additional supporting information
It would be useful to add the ramping time for inertial loads as an input option in MD rather than hard coding it
Test results, if applicable
None