Residual Modes for Structure Reduction and Efficient Coupling of Substructures

The paper deals with the systematical analysis of the reduction of the large structures using the singular perturbation approximation for the interconnected subsystems. The proportionally damped system is considered in the special modal form identical to the almost balanced form of the model. The residual mode is evaluated for the different types of outputs, namely position, velocity and acceleration form. Two main targets are the efficiency of the algorithms and the accuracy of the coupled reduced model with respect to the original large model. The efficient algorithm and the significant improvement of the accuracy with respect to the interconnection of the truncated subsystems are shown.