Reply To: AQWA: Hydrodynamic response error

[Shuangxing Du]

Will you need to define more connection stiffness 6x6 sub-matrices?  For example, from the linkages of the first row of 5 structures, you may need

(1A,1A), (1A,2A), (2A,2A), (2A,3A), (3A,3A), (3A,4A), (4A,4A), (4A,5A), (5A,5A) (9 6X6 sub-matrices for the first row). 27 6x6 sub-matrices for all 3 rows.

For the first column's additional sub-matrices due to the linkages, you should have (1A, 1B), (1B,1C) 6X6 sub-matrices. 10 additional sub-matrices for all the columns.

In total, you may have 37 6x6 sub-matrices.

Will the fixed point to structure mooring lines represent the joint condition well?   It may be nice to use the connection stiffness matrices directly.  You could use a presolve script to remove NASF option (Not use the additional structure stiffness matrix) from the hydrodynamic response analysis input data file. Alternative, switch on the beta option,

 Then in Hydrodyanmci response analsyis, set Include Linear Connection Stiffness Matrices as Yes. It will include the connection stiffness if it is defined.