海洋平台长期受到风、海流、波浪等载荷作用的影响，容易发生疲劳损伤，而构建分析模型则可以从理论上研究疲劳损伤的微观表现机制。基于该研究背景，提出海洋平台疲劳影响因素理论建模方法。结合深度强化学习算法原则，计算海洋平台的热点应力作用，进而评估其疲劳寿命，实现海洋平台疲劳寿命研究。在此基础上，定义S-N疲劳曲线，并在波浪谱中，分析平台的线性累积疲劳特性，完成海洋平台疲劳影响因素理论模型的设计。实验结果表明，本文方法得出了腹板厚度以及楔块开孔数量对平台结构疲劳损伤的影响规律，可以为海洋平台的抗疲劳设计提供理论和数据支持。
Offshore platforms are subject to long-term loads such as wind, ocean current and waves, and are prone to fatigue damage. The microscopic expression mechanism of fatigue damage can be studied theoretically by constructing an analysis model. Based on this research background, a theoretical modeling method of influencing factors of offshore platform fatigue is proposed. Combined with the principle of deep reinforcement learning algorithm, the hot spot stress of offshore platform is calculated, and then its fatigue life is evaluated to realize the fatigue life research of offshore platform. On this basis, the S-N fatigue curve is defined, and the linear cumulative fatigue characteristics of the platform are analyzed in the wave spectrum, and the theoretical model of the fatigue influencing factors of the offshore platform is designed. The experimental results show that the influence law of web thickness and the number of wedge openings on fatigue damage of platform structure is obtained by this method, which can provide theoretical and data support for anti-fatigue design of offshore platforms.
2025,47(17): 58-61 收稿日期：2024-10-16
DOI：10.3404/j.issn.1672-7649.2025.17.010
分类号：TU391
作者简介：李昌庆(1988-),男,博士,讲师,研究方向为计算机应用技术
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