Ph.D. Tezi Görüntüleme

      With the improving technology today, there are many algorithms available to obtain the optimum solution among the designs that satisfy some predefined conditions for a certain problem. The common property of these algorithms is that the parameters of the optimization such as material, load, geometry etc., are considered as deterministic. However, kinds of randomness exist for most of the parameters used in engineering problems. That is, considering these parameters as random variables is more truthful.

      It is concluded that when the parameters defined in the optimization are considered as random the weight of offshore structures are calculated heavier than those obtained with deterministic parameters. The performance measure approach based on the inverse reliability method is robust compare to the reliability index approach based on the first order reliability method in terms of both the convergence rate and the computation time. Although it needs more computation time differential evolution produces nearly the same results with the sequential quadratic programming and it can be employed.