شبیه سازی ترک در ورق ها و پوسته ها با استفاده از روش اجزای محدود توسعه یافته

There are a lot of approximation techniques for structural optimization. Among them, four
outstanding approximation methods have been selected for trusses optimization. These
approaches have been developed or modified by previous ones. Based on these schemes, a lot
of trusses have been optimized by author's program. This study shows that the abilities of the
mentioned methods are not the same and some of them have deficiencies. Reaching a better
solution, lesser analysis time, oscillation of response, numerical stability and also using a
variety of the design variables are among the findings of this work. A brief of these obtained
results has been given in the conclusion part.
Keywords: Nonlinear programming, Global optimum, Approximation methods, Convex
approximation, Structural analysis, Two and three dimensional trusses