Journal article
Reliability-Based Design Optimization Using Response Surface Method With Prediction Interval Estimation
Journal of mechanical design (1990), Vol.130(12), pp.1214011-12140112
12/01/2008
DOI: 10.1115/1.2988476
Abstract
Since variances in the input variables of the engineering system cause subsequent variances in the product output performance, reliability-based design optimization (RBDO) is getting much attention recently. However, RBDO requires expensive computational time. Therefore, the response surface method is often used for computational efficiency in solving RBDO problems. A method to estimate the effect of the response surface error on the RBDO result is developed in this paper. The effect of the error is expressed in terms of the prediction interval, which is utilized as the error metric for the response surface used for RBDO. The prediction interval provides upper and lower bounds for the confidence level that the design engineer specified. Using the prediction interval of the response surface, the upper and lower limits of the reliability are computed. The lower limit of reliability is compared with the target reliability to obtain a conservative optimum design and thus safeguard against the inaccuracy of the response surface. On the other hand, in order to avoid obtaining a design that is too conservative, the developed method also constrains the upper limit of the reliability in the design optimization process. The proposed procedure is combined with an adaptive sampling strategy to refine the response surface. Numerical examples show the usefulness and the efficiency of the proposed method.
Details
- Title: Subtitle
- Reliability-Based Design Optimization Using Response Surface Method With Prediction Interval Estimation
- Creators
- Chwail Kim - Agency for Defense Development, P.O. Box 18 Jinhae, Kyungnam 645-600, KoreaK. K Choi - Department of Mechanical and Industrial Engineering, College of Engineering, The University of Iowa, Iowa City, IA 52242
- Resource Type
- Journal article
- Publication Details
- Journal of mechanical design (1990), Vol.130(12), pp.1214011-12140112
- Publisher
- ASME
- DOI
- 10.1115/1.2988476
- ISSN
- 1050-0472
- eISSN
- 1528-9001
- Language
- English
- Date published
- 12/01/2008
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064596302771
Metrics
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