I don not know how to use openfast. I have a question to ask. How can I find the pretension of the mooring system after openfast is calulated？(The mooring model I use is mooryn.) Is it the calculated tension at 0 seconds？
Thanks for your help.
Yes. In the initialization of MoorDyn, a procedure is implemented to calculate the steady-state solution of the mooring system at its initial displacement, which is used to initialize the dynamic simulation. If the initial displacement of the system is zero (undisplaced), the resulting line tensions calculated at time zero could be considered the pretension.