Chinese Journal of Ship Research, Volume. 17, Issue 1, 147(2022)

An improved random forest-Monte Carlo method and application for structural reliability analysis of A-type independent liquid tank support structure

Xuejian LI, Bin QIN, Yifeng XIAO, and Zekun FU
Author Affiliations
  • Jiangnan Institute of Technology, Jiangnan Shipyard (Group) Co., Ltd., Shanghai 201913, China
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    Figures & Tables(11)
    [in Chinese]
    [in Chinese]
    The number of outliers varying with k-value离群点数量随值变化曲线
    [in Chinese]
    [in Chinese]
    [in Chinese]
    • Table 1. Calculation results of Case 1

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      Table 1. Calculation results of Case 1

      方法失效概率$ {P}_{\mathrm{f}} $相对误差$/\text{%}$样本数量
      MC$ \text{2.85}\times {10}^{-5} $$ \text{5}\times {10}^{7} $
      BP-MC$ \text{3.22}\times {10}^{-5} $$ 12.98 $$ 124 $
      改进RF-MC$ \text{3.1}\text{5}\times {10}^{-5} $$ 4.91 $$ 124 $
    • Table 2. Statistical characteristic values of basic random variable

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      Table 2. Statistical characteristic values of basic random variable

      随机变量$ /{\mathrm{c}\mathrm{m}}^{2} $均值$ \mu $标准差$ \sigma $分布类型
      $ {A}_{1} $83.878.387正态
      $ {A}_{2} $12.901.290正态
      $ {A}_{3} $58.065.806正态
    • Table 3. Calculation results of Case 2

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      Table 3. Calculation results of Case 2

      方法失效概率$ {P}_{\mathrm{f}} $相对误差$ /\text{%} $样本数量
      MC$\text{0.176}\;\text{40}$$ {10}^{5} $
      改进RF-MC$\text{0.179}\;\text{85}$$ 1.96 $$ 200 $
    • Table 4. Design variables distribution of A-type liquid tank support

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      Table 4. Design variables distribution of A-type liquid tank support

      类别编号变量参数1参数2分布类型
      支座结构支反力$ {X}_{1} $$ f_1/\mathrm{N} $$ 5.24\times {10}^{6} $$ 5.31\times {10}^{6} $均匀分布
      $ {X}_{2} $$ f_1/\mathrm{N} $$ 4.72\times {10}^{6} $$ 4.86\times {10}^{6} $均匀分布
      $ {X}_{3} $$ f_2/\mathrm{N} $$ 2.57\times {10}^{6} $$ 2.59\times {10}^{6} $均匀分布
      $ {X}_{4} $$ f_2/\mathrm{N} $$ 2.74\times {10}^{6} $$ 2.76\times {10}^{6} $均匀分布
      $ {X}_{5} $$ f_2/\mathrm{N} $$ 1.94\times {10}^{6} $$ 2.02\times {10}^{6} $均匀分布
      $ {X}_{6} $$ f_3/\mathrm{N} $$ 2.09\times {10}^{6} $$ 2.13\times {10}^{6} $均匀分布
      $ {X}_{7} $$ f_3/\mathrm{N} $$ 1.98\times {10}^{6} $$ 2.07\times {10}^{6} $均匀分布
      $ {X}_{8} $$ f_3/\mathrm{N} $$ 2.36\times {10}^{6} $$ 2.43\times {10}^{6} $均匀分布
      $ {X}_{9} $$ f_3/\mathrm{N} $$ 2.81\times {10}^{6} $$ 2.83\times {10}^{6} $均匀分布
      $ {X}_{10} $$ f_3/\mathrm{N} $$ 3.97\times {10}^{6} $$ 3.99\times {10}^{6} $均匀分布
      $ {X}_{11} $$ f_3/\mathrm{N} $$ 4.87\times {10}^{6} $$ 4.91\times {10}^{6} $均匀分布
      板材厚度$ {X}_{12} $$ d_1/\mathrm{m}\mathrm{m} $141.4正态分布
      $ {X}_{13} $$ d_1/\mathrm{m}\mathrm{m} $121.2正态分布
      $ {X}_{14} $$ d_2/\mathrm{m}\mathrm{m} $181.8正态分布
      $ {X}_{15} $$ d_3/\mathrm{m}\mathrm{m} $181.8正态分布
      $ {X}_{16} $$ d_4/\mathrm{m}\mathrm{m} $111.1正态分布
      $ {X}_{17} $$ d_4/\mathrm{m}\mathrm{m} $111.1正态分布
      $ {X}_{18} $$ d_5/\mathrm{m}\mathrm{m} $181.8正态分布
      $ {X}_{19} $$ d_6/\mathrm{m}\mathrm{m} $141.4正态分布
      纵骨尺寸$ {X}_{20} $$ d_7/\mathrm{m}\mathrm{m} $121.2正态分布
      $ {X}_{21} $$ d_8/\mathrm{m}\mathrm{m} $121.2正态分布
    • Table 5. Calculation results of Case 3

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      Table 5. Calculation results of Case 3

      方法失效概率$ {P}_{\mathrm{f}} $相对误差$ /\text{%} $样本数量
      MC$ {2.53\times 10}^{-2} $$ {10}^{5} $
      改进RF-MC$ \text{2.46}{\times 10}^{-2} $$ 2.77 $$ 250 $
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    Xuejian LI, Bin QIN, Yifeng XIAO, Zekun FU. An improved random forest-Monte Carlo method and application for structural reliability analysis of A-type independent liquid tank support structure[J]. Chinese Journal of Ship Research, 2022, 17(1): 147

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    Paper Information

    Category: Ship Structure and Fittings

    Received: Nov. 13, 2020

    Accepted: --

    Published Online: Mar. 24, 2025

    The Author Email:

    DOI:10.19693/j.issn.1673-3185.02181

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