Time-dependent reliability-based design optimization of main shaft bearings in wind turbines involving mixed-integer variables

Zhiyuan Jiang, Xianzhen Huang, Bingxiang Wang, Xin Liao, Huizhen Liu and Pengfei Ding

Reliability Engineering and System Safety, 2024, vol. 243, issue C

Abstract: Main shaft bearings are essential transmission components in wind turbines. The failure of the main shaft bearings is inevitably accompanied by catastrophic consequences. In this regard, this paper presents a time-dependent reliability-based design optimization (TRBDO) approach for main shaft bearings involving mixed-integer variables. The maximization of fatigue life and the elastohydrodynamic film thickness under the load spectrum are selected as optimization objectives. The time-dependent reliability and geometric correlation are determined as nonlinear constraints. An efficient two-stage enrichment strategy is introduced to handle the time-dependent probabilistic constraint with mixed-integer design variables. A mixed-integer nonlinear optimization method is developed based on a meta-heuristic algorithm to solve the formulated TRBDO problem. Eventually, the effectiveness and robustness of the proposed approach are demonstrated by a real application in a 5 MW wind turbine.

Keywords: Wind turbine; Main shaft bearing; Time-dependent reliability; TRBDO; Mixed-integer variables (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:243:y:2024:i:c:s0951832023007317

DOI: 10.1016/j.ress.2023.109817

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