Dynamic Strain Analysis of a Substructure by Use of the ExperimantalModel Analysis and the Finite Element Method

Abstract

To analyse the dynamic strain distribution of a substructure in detail and with accurate, a combined method is proposed such that the substructure is modeled by the finite elements and the remaining structure is expressed by the experimental model strain analysis using strain gages. The constraint method is used to solve the dynamic strain distribution of the substructure described in the finite elements against the boundary forces determined by the measured dynamic strains. Using numerical examples with beam elements and two dimensional triangle elements, this proposed method can analyse the dynamic strain distribution with satisfactory accuracy. Then an actual beam and an L-shape pipe are tested to show the effectiveness of the method.