基于随机腐蚀的船舶结构极限承载力研究

doi:10.11902/1005.4537.2021.144

中国腐蚀与防护学报

2022, Vol. 42

Issue (4): 662-668 DOI: 10.11902/1005.4537.2021.144

研究报告

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基于随机腐蚀的船舶结构极限承载力研究

梅佳雪¹, 杜尊峰¹(

), 朱海涛¹^,²

^1.天津大学建筑工程学院天津 300072
^2.天津大学滨海土木工程结构与安全教育部重点实验室天津 300372

Ultimate Bearing Capacity of Ship Structure Based on Random Corrosion

MEI Jiaxue¹, DU Zunfeng¹(

), ZHU Haitao¹^,²

^1.School of Civil Engineering and Architecture, Tianjin University, Tianjin 300072, China
^2.Tianjin Binhai Civil Engineering Structure and Safety Key Laboratory of Ministry of Education Tianjin University, Tianjing 300372, China

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摘要:

提出了综合考虑海洋环境温度、海水氧气含量和相对湿度影响的钢质海船腐蚀数学模型,采用有限元方法分析了随机腐蚀对船舶加筋板结构局部承载力以及船体梁总纵极限承载力的影响,揭示了随机腐蚀后的船舶结构极限承载力分布规律。相较于标称海洋环境,海洋环境温度、相对湿度和海水含氧量对船舶结构腐蚀极限承载力有显著影响,且同一年限加筋板和船体梁的极限承载力服从正态分布。

关键词 ：随机腐蚀, 腐蚀速率模型, 船舶结构, 极限承载力, 海洋环境

Abstract：

This paper puts forward a mathematical model for corrosion of steel made sea-going ships that takes the effect of marine environment temperature, seawater oxygen content and relative humidity into account. The effect of random corrosion on the local bearing capacity of stiffened plate structure of the ship and the longitudinal ultimate bearing capacity of ship hull girder is analyzed by finite element analysis. The distribution of ultimate bearing capacity of ship structure after being subjected from random corrosion is summarized. Compared with the nominal marine environment, the temperature, relative humidity and seawater oxygen content in marine environment have a significant impact on the ultimate bearing capacity of the ship structure. However, the ultimate bearing capacity of the stiffened plates and hull girder obeys a normal distribution after service for the same period of years.

Key words： random corrosion corrosion rate model ship structure ultimate bearing capacity marine environment

收稿日期: 2021-06-25

ZTFLH:

TG174

基金资助:国家自然科学基金(51478311);国家自然科学基金(51109158)

通讯作者: 杜尊峰 E-mail: dzf@tju.edu.cn

Corresponding author: DU Zunfeng E-mail: dzf@tju.edu.cn

作者简介: 梅佳雪,女,1998年生,硕士生

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引用本文:

梅佳雪, 杜尊峰, 朱海涛. 基于随机腐蚀的船舶结构极限承载力研究[J]. 中国腐蚀与防护学报, 2022, 42(4): 662-668.
Jiaxue MEI, Zunfeng DU, Haitao ZHU. Ultimate Bearing Capacity of Ship Structure Based on Random Corrosion. Journal of Chinese Society for Corrosion and protection, 2022, 42(4): 662-668.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.144 或 https://www.jcscp.org/CN/Y2022/V42/I4/662

图1 船体加筋板腐蚀厚度路线对比

图2 加筋板计算模型

图3 随机生成的加筋板厚度示意

表1 加筋板极限承载力计算结果

图4 加筋板极限承载力路线对比

图5 加筋板极限承载力概率

图6 集装箱船体梁有限元计算模型

表2 集装箱船体梁极限承载力结果对比

图7 随机生成的船体梁厚度示意

表3 船体梁中拱极限承载力计算结果

图8 集装箱船体梁中拱状况和中垂状况极限承载力概率

表4 船体梁中垂极限承载力计算结果

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