How can I obtain the stiffness matrix and mass matrix of the tower by modifying the source code?

[SherryEX]

openfast should not support the output of the stiffness matrix and mass matrix, so I want to modify the source code to obtain a pure stiffness matrix and mass matrix solely about the tower.

[jjonkman]

Dear @SherryEX,

The ElastoDyn module of OpenFAST computes the generalized stiffness and generalized mass matrix of the tower in the fore-aft and side-to-side directions separately in SUBROUTINE Coeff() of source file ElastoDyn.f90. You could access these data there.

Best regards,