A time-variant performance measure approach for dynamic reliability based design optimization

In this work, a time-variant performance measure approach is proposed by searching the minimum performance value during the time period. A modified directional step method is proposed by obeying a search strategy that each iterative value should be smaller than that of previous one. With this strategy, the time-variant minimum performance target point can be quickly found in each inner loop. The proposed method is applied to three numerical examples. The results are compared with other two existing methods, which verifies the robust accuracy and effectiveness of the proposed method. (C) 2019 Elsevier Inc. All rights reserved.