Chinese Journal of Ship Research, Volume. 16, Issue 5, 189(2021)
Fatigue strength analysis of aluminum alloy trimaran considering corrosion effects
Figures & Tables(19)
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Table 1. Hot spot for fatigue assessment of the aluminum alloy trimaran
View tableView in ArticleTable 1. Hot spot for fatigue assessment of the aluminum alloy trimaran
热点 结构位置 S1 艉封板与连接桥尾部湿甲板相交处 S2 湿甲板与片体相交处 S3 纵骨穿越强框架处 S4 连接桥与三体船主船体相交处 S5 连接桥与三体船侧体相交处 S6 连接桥与横舱壁相交处
Table 2. Calculation conditions and parameters of wave load response
View tableView in ArticleTable 2. Calculation conditions and parameters of wave load response
计算工况 数 值 航速U/kn 20 航向角θ/(º) 0，30，60，90，120，150，180 210，240，270，300，330 各航向角出现的概率Pj 1/12 波浪圆频率ω/(rad·s-1) 0.1~2.0
Table 3. Calculation of fatigue damage and life of aluminum-alloy trimaran based on direct calculation method
View tableView in ArticleTable 3. Calculation of fatigue damage and life of aluminum-alloy trimaran based on direct calculation method
热点 疲劳损伤度D 疲劳寿命TF /年 S1 0.198 2 126.14 S2 0.235 6 106.11 S3 0.178 9 139.74 S4 0.896 2 27.90 S5 0.913 0 27.38 S6 0.532 6 46.94
Table 4. Corrosion data of a bulk carrier provided by Paik et al[12]
View tableView in ArticleTable 4. Corrosion data of a bulk carrier provided by Paik et al[12]
时间 /a 均值 /mm 标准差 时间 /a 均值 /mm 标准差 时间 /a 均值 /mm 标准差 2.0 0.01 0.005 7.4 0.53 0.02 16.0 1.53 0.05 3.0 0.04 0.005 7.8 0.65 0.02 17.0 1.56 0.05 4.0 0.12 0.005 8.0 0.69 0.02 18.0 1.59 0.08 4.4 0.16 0.008 8.4 0.75 0.03 19.0 1.60 0.08 4.8 0.21 0.008 9.0 0.85 0.03 20.0 1.61 0.08 5.0 0.23 0.008 9.4 0.91 0.03 21.0 1.62 0.10 5.4 0.28 0.008 10.0 0.99 0.04 22.0 1.62 0.10 5.8 0.34 0.010 11.0 1.13 0.04 23.0 1.62 0.10 6.0 0.37 0.010 12.0 1.25 0.04 23.0 1.62 0.10 6.4 0.43 0.010 13.0 1.35 0.04 25.0 1.63 0.10 6.8 0.49 0.020 14.0 1.42 0.04 7.0 0.53 0.020 15.0 1.49 0.05
Table 5. Reduction ratio of fatigue life of conventional corrosion models
View tableView in ArticleTable 5. Reduction ratio of fatigue life of conventional corrosion models
项目 双线性模型 稳态模型 S1 S2 S4 S5 S1 S2 S4 S5 不考虑腐蚀时的寿命/a 126.14 106.11 27.90 27.38 126.14 106.11 27.90 27.38 25年腐蚀后的寿命/a 113.64 100.40 27.73 26.54 86.51 84.18 26.34 25.77 减少率/% 9.9 5.4 2.7 3.0 31.4 20.67 5.6 5.9 项目 幂函数模型 GC模型 S1 S2 S4 S5 S1 S2 S4 S5 不考虑腐蚀时的寿命/a 126.14 106.11 27.90 27.38 126.14 106.11 27.90 27.38 25年腐蚀后的寿命/a 114.21 100.68 27.22 26.91 102.89 92.15 26.62 25.97 减少率/% 9.5 5.1 2.4 1.7 18.4 13.2 4.6 5.1
Table 6. Reduction ratio of fatigue life of new corrosion model
View tableView in ArticleTable 6. Reduction ratio of fatigue life of new corrosion model
项目 S1 S2 S4 S5 不考虑腐蚀时的寿命/a 126.14 106.11 27.90 27.38 25年腐蚀后的寿命/a 102.88 92.25 26.53 25.93 减少率/% 18.4 13.06 4.91 5.29
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Chenyan ZHOU, Jianing ZHANG, lin CHEN, qiao MENG. Fatigue strength analysis of aluminum alloy trimaran considering corrosion effects[J]. Chinese Journal of Ship Research, 2021, 16(5): 189
Paper Information
Category: Ship Structure and Fittings
Received: Aug. 12, 2020
Accepted: --
Published Online: Mar. 28, 2025
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