Chinese Journal of Ship Research, Volume. 18, Issue 4, 233(2023)

Maintenance strategy analysis of fatigue-sensitive structure under service life extension uncertainty

Jie ZHANG1, Yan LIU1, Tianyun LI1, and Yiwen LU2
Author Affiliations
  • 1School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 2China Ship Development and Design Center, Wuhan 430064, China
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    Figures & Tables(13)
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    • Table 1. Random variable of fatigue crack propagation

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      Table 1. Random variable of fatigue crack propagation

      随机变量分布均值变异系数
      初始裂纹尺寸a0/mmLognormal分布0.50.1
      应力幅值Δσ/MPaWeibull分布200.1
      年均应力循环次数NavgLognormal分布$1.0 \times {10^6}$0.1
      疲劳系数CLognormal分布$2.3 \times {10^{ - 12}}$0.3
      材料参数m确定值3.0
    • Table 2. Quantitative parameters of maintenance intervention

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      Table 2. Quantitative parameters of maintenance intervention

      维修干预方式维修程度$ {\xi _{ij}} $/%维修费用$C_{{\rm{m}}}^{({x_i})}$/元
      m12020 000
      m24040 000
      m37070 000
      m4100100 000
      R200 000
    • Table 3. Economic analysis of maintenance strategy

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      Table 3. Economic analysis of maintenance strategy

      维修策略延寿要求维修干预延寿期间内最大失效风险/元灵活性的相对价值
      t1/x1t2/x2
      π11年12.68/m420.56/m411 963.5
      2年17 857.1
      3年24 868.1
      4年32 638.0
      5年41 135.9
      π21年14.50/R23.65/m13 145.72.62
      2年24.15/m14 608.9
      3年24.52/m16 576.4
      4年25.16/m19 076.2
      5年25.71/m112 042.2
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    Jie ZHANG, Yan LIU, Tianyun LI, Yiwen LU. Maintenance strategy analysis of fatigue-sensitive structure under service life extension uncertainty[J]. Chinese Journal of Ship Research, 2023, 18(4): 233

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    Paper Information

    Category: Ship Structure and Fittings

    Received: Jan. 27, 2022

    Accepted: --

    Published Online: Mar. 20, 2025

    The Author Email:

    DOI:10.19693/j.issn.1673-3185.02786

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