This study is concerned with the use of substructuring technique in dynamic structural analysis. The method uses component mode synthesis concepts. The mode shapes of each substructure are determined first, and the system mode shapes and natural frequencies are synthesized later from the mode shapes of the individual substructures. This method uses the fact that the mode shapes of complete structure are assumed to be a linear combination of the mode shapes of substructures. However, this assumption is useful only when the substructure mode shapes are very closely conformed to the system mode shapes.
In this study, the error due to the assumption can be reduced by the successive iteration until more accurate solution is obtained. This concept is demonstrated by some examples.
