Simulation of mooring line including spring in MoorDyn

[YiqXia]

Dear all,

I am simulating an experimental floating wind turbine with OpenFAST, and there is a part of spring in the mooring line where the length and EA is varying with the buoyancy. I tried to set it in the MoorDyn file, however it seems to me the line length and EA must be a constant value. Could you please give any advice on how to set it in MoorDyn?

Best regards,