船舶身处海洋环境，在航行过程中常会因复杂的海况而遭受到诸如干/湿交替侵蚀、海洋盐雾腐蚀、海浪拍打等冲击。其结果不仅会对船舶的维护及检修造成巨大的经济损失，同时也会影响到船舶设备的使用寿命与安全性。部分船舶服役的舰载机在每次升降的过程中，其冲击载荷也会使船舶板架结构产生损伤和裂纹，不仅会降低飞机的力学性能，同时也会造成其在降落时因冲击载荷而导致结构寿命缩短。为此，本文以38CrMoAl钢材料作为研究对象，从变载荷的作用机制入手，分析38CrMoAl钢材料在海洋环境下的冲击动态力学行为，完善船舶板架结构冲击的评估方法，为船舶承受冲击载荷结构的寿命评估奠定基础。
Ships are in the marine environment, and they are often subjected to impacts such as dry/wet alternating erosion, ocean salt spray corrosion, and waves beating due to complex sea conditions during navigation. As a result, it will not only cause huge economic losses to the maintenance and overhaul of the ship, but also affect the service life and safety of the ship's equipment. Some ships (such as warships) also have carrier-based aircraft in service. During each lifting process, the impact load will also cause damage and cracks to the ship’s frame structure, which will not only reduce the mechanical properties of the aircraft, but also cause It results in a shortened structural life due to impact loads when dropped. Accordingly, this paper takes 38CrMoAl steel material as the research object, and analyzes the impact dynamic mechanical behavior of 38CrMoAl steel material in the marine environment from the perspective of the mechanism of variable load, so as to improve the evaluation method of the impact of ship plate structure, and provide the structure for the ship to withstand the impact load. Lay the necessary foundation for life assessment.
2023,45(13): 44-47 收稿日期：2023-02-20
DOI：10.3404/j.issn.1672-7649.2023.13.009
分类号：U667.65
作者简介：倪军(1967-)，男，副教授，研究方向为船舶工程设计
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