In dealing with large structural systems with many physical degrees of freedom, component mode synthesis has proved to be an efficient method to reduce computational errors and to minimize computer costs by decomposing the system into several subsystems, each of which is analysed seperately.
Based on the results of these component analyses the substructures can be brought together again to the complete system by means of component mode synthesis method.
As for every structure only a limited number of modes can be determined and the dynamic load configuration in the substructural modal test is different from that of in the complete system, convergence problems are inherent.
In this paper, the truncated higher mode terms and the dynamic load distribution in the substructure are represented by interface inertia and stiffness loading.
By static condensation method, these interface loads are determined and let the kinetic and potential energies of the substructures be equal to that of the complete system.
From the theoretical and experimental results this method was proved to be an efficient way to satisfy the convergence problem.
