A SYMMETRICAL CRAIG-BAMPTON METHOD OF COUPLED FLUID-STRUCTURE SYSTEMS

A symmetric Craig-Bampton method of coupled fluid-structure systems is developed. The reduced matrices of the same features as those of conv entional substructures. Thus, standard procedures can be applied to as semble and solve the equations of the complete system. To solve the ei genvalue problem related to the substructure a special subspace iterat ion procedure is presented. The method can be applied to fluid-structu re systems with compressible or incompressible fluids. Constant pressu re modes can be dealt with by a convenient separation technique.