This data record may be used to input an additional linear structure stiffness matrix in the global fixed frame. If the analysis includes stage 2 the matrix will be re-set to zero and must be re-defined. If the NASF option is used (Administration and Calculation Options for the Aqwa Suite), this matrix will not be included in the analysis.

     2   5  7   11    16    21        31        41 
    - --- -- ---- ----- ----- --------- --------- ------ 
   |X|   |  |SSTF|     |     |         |         |      ... 
    - --- -- ---- ----- ----- --------- --------- ------ 
       |  |   |     |     |       |         |         |
       |  |   |     |     |       |----------------------    
       |  |   |     |     |       |		 
       |  |   |     |     |       | 
       |  |   |     |     |       |_(4)-(9) 6 Stiffness Values (6E10.0) 
       |  |   |     |     |     
       |  |   |     |     |_(3) Row Number of Stiffness Matrix (I5)              
       |  |   |     |
       |  |   |     |_(2) 2nd Structure Number (I5)
       |  |   |     
       |  |   |_(1)Compulsory Data Record Keyword (A4) 
       |  | 
       |  |_Optional User Identifier (A2) 
       |
       |_Compulsory END on last data record in data category (A3)

         

(2) The data on this data record defines one row of a stiffness matrix coupling this structure to the one indicated on the WFS* data record in the data category keyword (referred to here as Structure#1). If this is zero or omitted, Structure#2 is set to be the same as Structure#1. Otherwise this number must not be less than Structure#1.

(3) This number indicates which row of the stiffness matrix the values input in columns 21-80 relate to.

(4)-(9) These are the values for the row (3) in the 6x6 additional structure stiffness sub-matrix. The units for angles are radians.

If there are multiple SSTF data records defining the same terms in the stiffness matrix, the values are summed.