RESPONSE REANALYSIS OF MODIFIED STRUCTURES USING RECEPTANCE MODIFICATION STRATEGY

The basic purpose of reanalysis methods is to compute modified solutio ns without a complete structural analysis for each design modification introduced. Only the knowledge of the solution of the initial problem and the definition of the modifications are required. The resulting s aving of computational times allows the designer to do repetitive anal yses of large finite element structures. This paper presents, in detai l, two efficient techniques for computing the modified forced sinusoid al response of structures. These two methods both take into account ma ss, damping and stiffness modifications. In view of the numerical resu lts obtained, concerning a 36 dof simple clamped plate model, the usef ulness of these methods has been proved.