Partitioned analysis of coupled mechanical systems

Abstract

Partitioned analysis is a method by which sets of time-dependent ordinary differential equations for coupled systems may be numerically integrated in tandem, thereby avoiding brute-force simultaneous solution. The coupled systems addressed pertain to fluid—structure, fluid—soil, soil—structure, or even structure—structure interaction. The paper describes the partitioning process for certain discrete-element equations of motion, as well as the associated computer implementation. It then delineates the procedure for designing a partitioned analysis method in a given application. Finally, examples are presented to illustrate the concepts. It is seen that a key element in the implementation of partitioned analysis is the use of integrated, as opposed to monolithic software.