Reliability-Based Structural Optimization of Stochastic Structure Systems Considering Stability
The problem of failure mode analysis of stochastic structural systems, dealing with the design variables expression, reliability-based structural optimization and improved stability of girders, have been studied in this paper. Considering the material intensity, girder section area, panel thickness and loads as stochastic variables, a mathematical model of optimization is constructed. In the iterative procedure, the optimum vector method was adopted to optimize the object and the gradient step; and the optimum vector step have been used alternatively, and these can speed up the iterative procedure. The calculation of a numerical example shows this method is exact and free from the selection of optimum start point, further more the convergence is stable and fast.
H.S. Lee, I.S. Yoon and M.H. Aliabadi
X. C. Yan "Reliability-Based Structural Optimization of Stochastic Structure Systems Considering Stability", Key Engineering Materials, Vols. 385-387, pp. 261-264, 2008