Dear Jason,
I tested the python wrapper for MAP++ that you have mentioned for the original FAST Test25 DeepC floating wind model. It seems possible to define the variation of surge displacement in the provided python driver (map-plus-plus.readthedocs.io/en/ … figuration):
… …
surge = 0.0 # 5 meter surge displacements
mooring_1.displace_vessel(surge,0,0,0,0,0)
mooring_1.update_states(0.0,0)
… …
I finally succeeded in getting the following results for the surge displacement=0.0 m :
Linearized stiffness matrix with 0.00 surge vessel displacement:
[[ 7.07e+04 6.86e-02 3.16e-02 -1.82e+00 -1.08e+05 -7.20e-01]
[ 3.79e-01 7.07e+04 -2.98e-02 1.08e+05 -3.23e+00 -2.23e+00]
[ 3.45e-02 2.80e-01 1.91e+04 2.26e-01 -2.01e-01 4.71e+00]
[ -1.75e+00 1.10e+05 -1.16e-01 8.74e+07 -1.80e+02 -2.83e+01]
[ -1.10e+05 -2.82e+00 -1.41e-01 1.22e+02 8.74e+07 2.90e+01]
[ -8.54e-01 -2.23e+00 4.45e+00 -3.71e+01 3.43e+01 1.17e+08]]
Line 1: H = 909704.13 [N] V = 631915.26 [N]
Line 1: Fx = 909704.13 [N] Fy = 0.00 [N] Fz = 631915.26 [N]
The vertical pretension V = 631915.26 [N] indicates that this result coincides with that of FAST simulation.
What I wonder is: which value(s) in the above outputs (there is a linearized 6X6 stiffness matrix for the whole mooring system together with pretension and some other outputs for Line 1) should I use to generate the force-displacement relationship plot?
Thanks a lot.
Best regards,
Yingyi Liu