Classification into modal clusters based on the modal contribution analysis of a subsystem

This paper addresses a method of classifying modal clusters to realize resonance control. Especially in this paper, is applied the simultaneous placement frequencies multiple modes belonging specified cluster through structural modification limited subsystem. The useful for separating frequency be designed from peak excitation spectrum all at once. Therefore, proposes consider whole structure formed same mode subsystem by using contribution analysis which proposed authors. Then, under above definition cluster, we introduce moving together without significantly changing other clusters. Finally, its usefulness shown numerical example.