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A reliability-based design and optimization strategy using a novel MPP searching method for maritime engineering structures

Shiyuan Yang (School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, China) (Institute of Electronic and Information Engineering of UESTC in Guangdong, Dongguan, China)
Debiao Meng (School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, China) (Institute of Electronic and Information Engineering of UESTC in Guangdong, Dongguan, China)
Yipeng Guo (School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, China) (Institute of Electronic and Information Engineering of UESTC in Guangdong, Dongguan, China)
Peng Nie (School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, China) (Institute of Electronic and Information Engineering of UESTC in Guangdong, Dongguan, China)
Abilio M.P. de Jesus (Faculty of Engineering, INEGI, University of Porto, Porto, Portugal)

International Journal of Structural Integrity

ISSN: 1757-9864

Article publication date: 5 September 2023

Issue publication date: 19 October 2023

134

Abstract

Purpose

In order to solve the problems faced by First Order Reliability Method (FORM) and First Order Saddlepoint Approximation (FOSA) in structural reliability optimization, this paper aims to propose a new Reliability-based Design Optimization (RBDO) strategy for offshore engineering structures based on Original Probabilistic Model (OPM) decoupling strategy. The application of this innovative technique to other maritime structures has the potential to substantially improve their design process by optimizing cost and enhancing structural reliability.

Design/methodology/approach

In the strategy proposed by this paper, sequential optimization and reliability assessment method and surrogate model are used to improve the efficiency for solving RBDO. The strategy is applied to the analysis of two marine engineering structure cases of ship cargo hold structure and frame ring of underwater skirt pile gripper. The effectiveness of the method is proved by comparing the original design and the optimized results.

Findings

In this paper, the proposed new RBDO strategy is used to optimize the design of the ship cargo hold structure and the frame ring of the underwater skirt pile gripper. According to the results obtained, compared with the original design, the structure of optimization design has better reliability and stability, and reduces the risk of failure. This optimization can also better balance the relationship between performance and cost. Therefore, it is recommended for related RBDO problems in the field of marine engineering.

Originality/value

In view of the limitations of FORM and FOSA that may produce multiple MPPs for a single performance function, the new RBDO strategy proposed in this study provides valuable insights and robust methods for the optimization design of offshore engineering structures. It emphasizes the importance of combining advanced MPP search technology and integrating SORA and surrogate models to achieve more economical and reliable design.

Keywords

Acknowledgements

This research was funded by the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2022A1515240010) and the Sichuan Science and Technology Program (Grants No. 2022YFQ0087 and 2022JDJQ0024).

Citation

Yang, S., Meng, D., Guo, Y., Nie, P. and Jesus, A.M.P.d. (2023), "A reliability-based design and optimization strategy using a novel MPP searching method for maritime engineering structures", International Journal of Structural Integrity, Vol. 14 No. 5, pp. 809-826. https://doi.org/10.1108/IJSI-06-2023-0049

Publisher

:

Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

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