2. Reference solution

To verify the calculation of the mass matrix, option MASS_MECA, we use the S_R property of the matrices calculated with CALC_MATR_ELEM which is compared with that obtained for the standard elements (3D, D_ PLAN and AXIS). The solution is therefore AUTRE_ASTER.

For stiffness matrices, we always use the S_R property of the matrices calculated with option RIGI_MECA except that in this case the solution is of the non-regression type.