Dear Mustafa,
I would expect the WAMIT output files provided in the FAST/OpenFAST archives for the MIT/NREL TLP (tlpmit.1, .3, and .hst) would be the same as what is in Matha (2010).
The WAMIT output data is nondimensional, so, I would first check that you’ve redimensionalized the data properly. I’m questioning particularly the B33 plot, where the B33 term does not tend toward zero at low frequency, even though it should be redimensionalized by multiplying by rho*omega. See the following forum post for information on how to dimensionalize the WAMIT output: WAMIT - #4 by Jason.Jonkman.
Best regards,