A simplified method for structural fatigue analysis of hovercraft

1 College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China 2 International Joint Laboratory of Naval Architecture and Offshore Technology, Harbin 150001, China

Abstract: ［Objectives］The operation principle of a hovercraft is different from those of conventional ship, with special stresses and much higher speeds than conventional ships. At present, the simplified fatigue strength calculation method proposed by major classification societies is not fully applicable to hovercraft, so it is necessary to put forward a suitable simplified method.［Methods］According to the special structure and sailing mode of hovercraft, and combined with mainstream specifications, experiments and related research, this paper analyzes the working conditions, load calculations, cumulative damage derivation and other aspects, and puts forward a simplified method suitable for the fatigue analysis of hovercraft structures using a specific hovercraft as an example for calculation.［Results ］The simplified calculation results show that the fatigue life of typical longitudinal nodes meets the requirements of fatigue strength, and the analysis results of the example show that this method has certain applicability.［Conclusions］The simplified method proposed in this paper can be used as a reference for the development, design and verification of hovercraft. Key words: hovercraft；fatigue strength；simplified calculation；specifications

0 引 言

根据中国船级社（CCS）《海上高速船入级及建造规范》 中的定义，气垫船是指船舶不论在静

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止还是运动时，其全部重量或大部分重量能被连续产生的气垫所支承的船舶。气垫船的航行阻力很小，航速可高达 60~80 km/h，能够完成多种使命任务，在军用和民用领域均有着十分广阔的发展

收稿日期: 2020–09–05 修回日期: 2020–12–03基金项目:国家自然科学基金资助项目（51679050）作者简介:唐首祺，男，1997 年生，硕士生。研究方向：环境载荷与结构强度。E-mail：t534440511@hrbeu.edu.cn刘宁，男，1981年生，博士，副研究员。研究方向：高性能船舶波浪载荷预报与结构强度评估，船舶与海洋结构物疲劳断裂分析与试验研究。E-mail：liuwarman@163.com任慧龙，男，1965年生，博士，教授。研究方向：船舶与海洋工程结构波浪载荷，结构强度评估，结构可靠性与风险评估，舰船环境适应性。E-mail：renhuilong@263.net *通信作者:刘宁

网络首发时间: 2021–04–25 09:34