Author(s)

K. Yamazaki, J. Sakamoto & M. Kitano

Abstract

Efficient shape optimization technique based on boundary element method K. Yamazaki, J. Sakamoto, M. Kitano Department of Mechanical Systems Engineering, Kanazawa University, 2-40-20 Kodatsuno, Kanazawa 920, Japan ABSTRACT An efficient approximation method to determine the optimum shape of minimum weight subjected to stress constraints is suggested by using the boundary element method. The objective function of weight is approximated to an expansion of a second-order Taylor series and the stress constraints to expansions of first-order Taylor series, based on the boundary element sensitivity analysis at current design point. Then the approximated subproblem is solved by a linear complementary pivot method. Design variable reduction techniques of isoparametric interpolation and trigonometric series interpolation for the design boundary shape are also adopted for reducing the degree of freedom of the design problems. The shape optimization technique su

Keywords