Application of a new local effective constrained response surface method in structural reliability optimization design. Issue 3 (14th March 2019)

• Record Type: Journal Article
• Authors: Su, Hailiang; Lan, Fengchong; He, Yuyan; Chen, Jiqing
• Is Part Of: Engineering computations. Volume 36:Issue 3(2019)
• Page Start: 1055
• Page End: 1078
• Publication Date: 2019-03-14
• Subjects: Response surface method -- Efficient set algorithm -- Local effective constraint -- Structural reliability optimization design -- Uncertainty optimization; Computer-aided engineering -- Periodicals; Computer graphics -- Periodicals; 620.00285
• DOI: 10.1108/EC-07-2018-0331
• Languages: English
• ISSNs: 0264-4401

Abstract

Abstract : Purpose: Meta-model method has been widely used in structural reliability optimization design. The main limitation of this method is that it is difficult to quantify the error caused by the meta-model approximation, which leads to the inaccuracy of the optimization results of the reliability evaluation. Taking the local high efficiency of the proxy model, this paper aims to propose a local effective constrained response surface method (LEC-RSM) based on a meta-model. Design/methodology/approach: The operating mechanisms of LEC-RSM is to calculate the index of the local relative importance based on numerical theory and capture the most effective area in the entire design space, as well as selecting important analysis domains for sample changes. To improve the efficiency of the algorithm, the constrained efficient set algorithm (ESA) is introduced, in which the sample point validity is identified based on the reliability information obtained in the previous cycle and then the boundary sampling points that violate the constraint conditions are ignored or eliminated. Findings: The computational power of the proposed method is demonstrated by solving two mathematical problems and the actual engineering optimization problem of a car collision. LEC-RSM makes it easier to achieve the optimal performance, less feature evaluation and fewer algorithm iterations. Originality/value: This paper proposes a new RSM technology based on proxy model to complete the reliability design. The originality of this paper is to increase the sampling points by identifying the local importance of the analysis domain and introduce the constrained ESA to improve the efficiency of the algorithm.