Force modes for reducing the interface between substructures

Model reduction using component modes is an efficient way to speed up the computation of the dynamical behavior of a system. Interface degrees of freedom must usually be kept as connectors between the substructures. We review same of the options to reduce the interface problem when applying component mode synthesis and propose a new reduction procedure where interface modes for interconnecting forces are computed based on the interface flexibility matrix. This procedure is computationally efficient and naturally parallel. The accuracy of the proposed procedure is tested on a plane stress example.