| Author Name | Affiliation | | Lin Hua | School of Naval Architecture & Ocean, Naval University of Engineering, Wuhan 430033, China
Naval Vessel Technical Evaluation Center for Hull Strucutre Strength, Wuhan 430033, China | | Fan Wu | School of Naval Architecture & Ocean, Naval University of Engineering, Wuhan 430033, China
Naval Vessel Technical Evaluation Center for Hull Strucutre Strength, Wuhan 430033, China | | Jinlei Mu | School of Naval Architecture & Ocean, Naval University of Engineering, Wuhan 430033, China
Naval Vessel Technical Evaluation Center for Hull Strucutre Strength, Wuhan 430033, China | | Xiaolong Ma | School of Naval Architecture & Ocean, Naval University of Engineering, Wuhan 430033, China |
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| Abstract: |
| In order to solve the problem of calculating the ultimate strength of marine plate under pitting corrosion, the plate taking from marine with pitting corrosion was studied. Based on the data of pitting corrosion recorded, the concept of pitting corrosion characteristic element matrix was proposed to describe the distribution and the forms of pitting. Moreover, the model of sensitivity calculation was established to analyse the sensitivity of pitting corrosion characteristic elements for the ultimate bearing capacity of ship structural plate. A new approach was proposed to calculate the ultimate strength of pitting damaged ship structural plate under combined loads based on the factor of rigidity reduction. Simultaneously this new approach was proven to be validated by finite element simulation. Finally, formula of ultimate strength of pitting damaged ship hull plate was established by series of numerical calculations based on the approach，and the reliability of the formula was validated as well. |
| Key words: ship structure pitting damage ultimate strength combined loads sensitivity analysis |
| DOI：10.11916/j.issn.1005-9113.16226 |
| Clc Number:U661.4 |
| Fund: |
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| Descriptions in Chinese: |
| 联合载荷作用下点蚀船体板的极限强度计算方法研究 滑林1，2，吴梵1，2，牟金磊1，2，马晓龙1 （1. 海军工程大学 舰船与海洋学院，武汉 430033； 2. 海军舰艇技术鉴定船体结构强度校核中心， 武汉 430033） 创新点说明：1）结合实船（舰艇）点蚀勘验数据，提出了点蚀矩阵的概念，建立了点蚀分布的数学模型，为全面开展点蚀相关研究提供了新的途径； 2）采用新的灵敏度计算方法开展了点蚀特征（分布，点蚀深度及蚀坑半径等）对船体板极限强度的贡献值计算； 3）提出了刚度缩减因子的概念，并拟合出了点蚀损伤船体板极限强度的计算评估公式。 关键词：船体结构；点蚀损伤；极限强度；联合载荷；灵敏度分析 |
