Journal of The School of Marine Science and Technology,Vol.1 No.1
Application of Boundary Element Method to Dynamic Problem for Composite Thin Plate
Tetsutaro KAWAKAMI and Youichi OGURA
Abstract
The plate is one of the basic structural members. Therefore, various researches both for the static and the dynamic
plate problems have been carried out. However, in these research, the plate was supposed to constructed homogeneous
material. The researches on the composite plate problems are carried out little.
The dynamic properties of composite plates are analyzed by the boundary element method in this study.The composite
plate is defined in this analysis by combining an infinite thin plate and a finite thin plate,that is casted into the infinite plate,
and whose material properties are different from the infinite plate. Therefore, the composite plate problem is reduced to
a coupling problem of the two plates with different material properties.
To investigate the dynamic response of the composite thin plate,numerical analyses for some models are carried out.
In these numerical analyses, the ratio of the flexural rigidity of the two plates and the angular frequency of the harmonic
cyclic loading are chosen as the parameters.The numerical results of the relation between the ratio of the flexural rigidity
of the two plates and the dynamic response of the deflection (lateral displacement),and the relation between the angular
frequency of the harmonic cyclic loading and the dynamic response of the deflection are shown. The results show the
dynamic response of the composite plates well, and also confirm the usefulness of the proposed method for the composite
plate problems.