NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan
53rd NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan
Session ID : 2D7
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OS20-2
Identification of Coeffieints in Linear Elastic Wave Equation by using the Adjoint Numerical Method
*Kenji Shirota
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Abstract
The purpose of this research is to propose a numerical method for the problem of coefficient identification in linear elastic wave equation for the plane strain state: Determine unknown density, Young's modulus, and Poisson's ratio from the knowledge of the plural sets of simultaneous displacement and traction on the surface of elastic bounded body. We assume that the elastic body is an isotropic. To determine unknown elastic coefficents numerically, we adopt the adjoint numerical method. The minimizing problem with some constrains is introduced by using variational method. To find the minimum, an technique based on the projected gradient method is proposed. By numerical experiment, we show the effectiveness of our technique.
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© 2004 Committee for Mechanics and Structure,Science Council
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