AEROSPACE SHANGHAI, Volume. 42, Issue 2, 121(2025)
A Rapid Prediction Method for the Bearing Limit of Composite-bolted Joints Based on Vision Transformer Networks
Figures & Tables(26)
Fig. 2. Simulated morphology for washers and critical mating surfaces
Fig. 3. Random deviation surfaces generated based on fractal geometry
Fig. 5. Process for modeling the multi-scale part surface morphology
Fig. 6. Fusion process of different modal data types in the assembly process
Fig. 8. Diagram of color interpolation and mapping principal for the matching surface
Table 1.
Modeling methods for geometric deviations at different scales View tableView in ArticleTable 1.
Modeling methods for geometric deviations at different scales 尺度 建模方法 表面纹理 标称模型 波纹度 高斯与非高斯随机场 粗糙度 分形表面
Table 2.
Symbol meanings of the bilinear traction-separation law View tableView in ArticleTable 2.
Symbol meanings of the bilinear traction-separation law 含义 模式Ⅰ 模式Ⅱ 模式Ⅲ 分离位移 拉压力 损伤开始时的分离位移 完全伤害时的分离位移 刚度系数 强度 临界断裂能释放率
Table 3.
Parameter selection ranges and grid details for the simulations View tableView in ArticleTable 3.
Parameter selection ranges and grid details for the simulations 含义 最小值 最大值 螺栓端面摩擦系数 0.10 0.50 螺母与复合层压板之间的摩擦系数 0.10 0.50 螺母端面摩擦系数 0.10 0.50 螺纹摩擦系数 0.10 0.50 垫圈内半径 3.00 3.50 垫圈外圆半径 5.00 10.0 垫圈厚度 0.50 2.00 螺母拧紧角 0.16 1.36 孔周围的网格数 64.00 96.00
Table 4.
Hyper-parameters of the CBJ-VIT View tableView in ArticleTable 4.
Hyper-parameters of the CBJ-VIT 参数 数值 批量大小/个 1 优化器 Adam 学习率 0.000 1 0.58 0.98 注意力头数量/个 16
Table 5.
Performance comparison of results obtained by different methods View tableView in ArticleTable 5.
Performance comparison of results obtained by different methods 模型 RMSE/kN MAE/kN PAE/kN PPAE/% 无图像数据(XGboost) 0.701 0.462 3.067 17.03 无VIT融合 0.442 0.223 3.020 16.70 特征融合 0.624 0.351 3.410 18.96 CBJ-VIT 0.105 0.084 0.410 2.27
Table 6.
Comparison of the calculation time with different methods View tableView in ArticleTable 6.
Comparison of the calculation time with different methods 方法 时间/s 粗糙网络有限元分析时间 43 008.5 精密网络有限元分析时间 72 152.7 CBJ-VIT 8.1
Table 7.
Data measured by experiments View tableView in ArticleTable 7.
Data measured by experiments 样本编号 厚度/mm 内径/mm 外径/mm 摩擦系数 1 摩擦系数2 摩擦系数3 摩擦系数4 拧紧扭矩/(N·m) 挤压极限/kN 1 0.95 3.10 9.80 0.47 0.48 0.22 0.14 9.03 15.10 2 1.25 3.15 6.50 0.22 0.23 0.44 0.29 8.51 12.40 3 0.54 3.40 6.80 0.27 0.18 0.38 0.47 8.56 13.04 4 1.52 3.47 8.20 0.35 0.12 0.48 0.19 15.28 14.63 5 1.89 3.29 9.50 0.41 0.36 0.45 0.15 14.63 18.01 6 1.69 3.11 5.80 0.21 0.44 0.16 0.18 12.89 13.21 7 0.79 3.29 8.20 0.47 0.28 0.14 0.44 6.56 12.83 8 1.95 3.45 7.85 0.12 0.45 0.31 0.11 10.83 13.89 9 1.10 3.10 9.45 0.16 0.21 0.10 0.19 19.35 17.85 10 1.75 3.15 8.15 0.35 0.13 0.32 0.34 18.84 15.10
Table 8.
Comparison of the errors between the FEM results and the CBJ-VIT results View tableView in ArticleTable 8.
Comparison of the errors between the FEM results and the CBJ-VIT results 方法 RMSE MAE PAE/kN FEM 0.31 0.15 0.24 CBJ-VIT 0.48 0.19 0.27
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Yu REN, Yuming LIU, Qingyuan LIN, Yong ZHAO, Hui CHENG. A Rapid Prediction Method for the Bearing Limit of Composite-bolted Joints Based on Vision Transformer Networks[J]. AEROSPACE SHANGHAI, 2025, 42(2): 121
Paper Information
Category: Simulation and Analysis
Received: Jan. 8, 2025
Accepted: --
Published Online: May. 26, 2025
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