Chinese Journal of Ship Research, Volume. 17, Issue 6, 236(2022)
Combined surrogate model for stress prediction of spherical bulkhead with openings
Figures & Tables(10)
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Table 1. Structural parameters of typical spherical bulkhead with openings
View tableView in ArticleTable 1. Structural parameters of typical spherical bulkhead with openings
编号 结构参数 符号 1 球壁半径 R2 2 圆柱壳半径 R1 3 过渡环半径 R3 4 球壁厚度 t1 5 圆柱壳厚度 t2 6 过渡环厚度 t3 7 围栏厚度 t4 8 偏斜围栏半径 R4 9 偏斜围栏高度 h 10 偏斜围栏内伸高度 h1 11 偏斜角 θ 12 斜置围栏半径 R4' 13 斜置围栏高度 h' 14 斜置围栏内伸高度 h1' 15 水平斜置角 φ 16 斜置围栏水平坐标 ex 17 斜置围栏竖直坐标 ey
Table 2. Design variable value space of single-opening surrogate model
View tableView in ArticleTable 2. Design variable value space of single-opening surrogate model
设计变量 取值空间 水平偏角Qzx /(°) [5:2:25] 竖直偏角Qyz /(°) [5:2:25] 围栏轴心x方向位置e1 /m [0.8:0.2:2.4] 围栏内、外伸高度之和dh1 /m [0.5:0.1:1.2] 围栏内伸高度系数kh [0.3:0.05:0.7] 围栏半径R4 /m [0.2:0.04:0.6] 围栏厚度t4 /m [0.035:0.005:0.07] 球壁半径R2 /m [3:0.4:7] 圆柱壳半径/球壁半径k1 [0.75:0.01:0.85] 过渡环半径/球壁半径k2 [0.18:0.004:0.22] 过渡环厚度t3 /m [0.04:0.005:0.08] 圆柱壳厚度/过渡环厚度kt1 [0.75:0.02:0.95] 球壁厚度/过渡环厚度kt2 [0.9:0.02:1.1]
Table 3. Accuracy of characteristic stress surrogate model under different number of sample points
View tableView in ArticleTable 3. Accuracy of characteristic stress surrogate model under different number of sample points
样本点数 特征应力 平均误差/% 最大误差/% 40d σ1 5.69 30.21 σ2 6.59 28.19 σ3 8.56 44.41 σ4 5.40 39.54 70d σ1 4.53 25.20 σ2 5.26 24.75 σ3 6.68 46.81 σ4 4.92 35.37 100d σ1 4.40 31.10 σ2 5.06 22.83 σ3 6.11 38.68 σ4 4.61 37.66
Table 4. Accuracy of combined surrogate model
View tableView in ArticleTable 4. Accuracy of combined surrogate model
特征应力 平均误差/% 最大误差/% σ1 3.53 18.44 σ2 4.47 17.87 σ3 0.68 15.73 σ4 0.56 18.24
Table 5. Parameters of typical multi-opening spherical bulkhead structure
View tableView in ArticleTable 5. Parameters of typical multi-opening spherical bulkhead structure
结构参数 数值 球壁半径/基准半径R2 /R* 1.2 圆柱壳半径/基准半径R1 /R* 1.0 过渡环半径/基准半径R3 /R* 0.24 球壁厚度/基准厚度t1 /t* 3.0 圆柱壳厚度/基准厚度t2/t* 2.5 过渡环厚度/基准厚度t3 /t* 3.0 围栏厚度/基准厚度t4 /t* 2.5 偏斜围栏半径/基准半径R4/R* 0.07 偏斜围栏高度h/m 0.7 偏斜围栏内伸高度h1 /m 0.25 偏斜角θ/(°) 30 斜置围栏半径/基准半径R4'/R* 0.08 斜置围栏高度h'/m 0.9 斜置围栏内伸高度h1'/m 0.4 水平斜置角φ/(°) 10 上斜置围栏水平坐标ex,upper/m 3 上斜置围栏竖直坐标ey,upper/m −0.3 下斜置围栏水平坐标ex,lower/m 2.7 下斜置围栏竖直坐标ey,lower/m −1.3
Table 6. Comparison of the predicted characteristic stress values of the combined surrogate model and the calculated values of the finite element for the typical multi-opening spherical bulkhead
View tableView in ArticleTable 6. Comparison of the predicted characteristic stress values of the combined surrogate model and the calculated values of the finite element for the typical multi-opening spherical bulkhead
特征应力 组合代理模型 预报值/MPa 有限元计算 值/MPa 组合代理 模型误差/% 偏斜围栏孔边球壁中面 最大主应力 565.7 507.7 11.42 偏斜围栏中面 最大主应力 398.0 378.0 5.30 上端斜置围栏孔边球壁中面 最大主应力 599.0 638.0 -6.11 上端斜置围栏中面 最大主应力 452.2 441.5 2.42 下端斜置围栏孔边球壁中面 最大主应力 599.3 641.2 -6.54 下端斜置围栏中面 最大主应力 460.0 443.2 3.80 过渡环中点内表面 纵向应力 794.5 793.5 0.12 与过渡环连接处的圆柱壳内 表面纵向应力 330.3 317.8 3.93
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Tianyi CHEN, Weiping HE, Jun LIU, Yuansheng CHENG. Combined surrogate model for stress prediction of spherical bulkhead with openings[J]. Chinese Journal of Ship Research, 2022, 17(6): 236
Paper Information
Category: Ship Structure and Fittings
Received: May. 25, 2021
Accepted: --
Published Online: Mar. 26, 2025
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