Chinese Optics, Volume. 16, Issue 3, 673(2023)
Design and simulation of the dummy thoracic finite element model based on mashine vision
Fig. 2. Geometric parameter acquisition system for dummy model based on machine vision
Fig. 3. Assembly drawing of geometric model of dummy interior chest
Fig. 4. Schematic diagram of the internal structure and organs of the chest
Fig. 5. (a) Schematic diagram[18] and (b) preparation diagram of dummy chest calibration test
Fig. 11. Simulation results of off-stage vehicle collision at different times
Table 1. Partial material parameters of chest model
View tableView in ArticleTable 1. Partial material parameters of chest model
参数 弹性材料 MAT1 弹塑性材料 MAT3 刚体材料 MAT20 弹性模量E/GPa 0.5 205 205 泊松比μ 0.30 0.31 0.31 屈服强度σ/MPa / 0.6 / 切线模量/GPa / 0.5 /
Table 2. Material parameters of thoracic rib (elastic material MAT1)
View tableView in ArticleTable 2. Material parameters of thoracic rib (elastic material MAT1)
参数 参数值 体积模量(BULK) 0.33 GPa 短效剪切模量(G0) 0.11 MPa 衰减常数(BETA) 0.15 长效剪切模量(GI) 0.024 MPa
Table 3. Chest foam material (MAT57) parameters
View tableView in ArticleTable 3. Chest foam material (MAT57) parameters
参数 参数值 杨氏模量(E) 0.005 MPa 拉应力(TC) 0.1 滞后卸载系数(HU) 1.0 粘滞系数(DAMP) 0.1 衰减常数(BETA) 0.1
Table 4. Calibration test and simulation results of chest
View tableView in ArticleTable 4. Calibration test and simulation results of chest
类型 位移峰值(mm) 摆锤力峰值(kN) 滞后率(%) 要求 63.5～72.6 5.16～5.89 69～85 试验 65.402 5.788 73.98 仿真 61.117 5.865 70 误差 -6.55 1.33 -5.37
Table 5. Comparison of optimization results
View tableView in ArticleTable 5. Comparison of optimization results
x1(MPa) x2(Mpa) x3 x4(Mpa) Dmax(mm) Fmax(kN) 滞后率(%) 原参数 0.11 0.253 0.15 0.5 61.117 5.865 70.00 优化后 0.087 0.234 0.172 0.439 64.401 5.615 71.13 标定要求 / / / / 63.5～72.6 5.16～5.89 69～85 试验 / / / / 65.402 5.788 73.98 误差(%) / / / / −1.5 −2.9 −3.85
Table 6. Comparison of chest injury index between real vehicle test and dummy
View tableView in ArticleTable 6. Comparison of chest injury index between real vehicle test and dummy
损伤指标 胸部加速度C3ms(g) 胸部压缩量ThPC(mm) 性能限值 38～60 22～50 试验值 38.47 29.21 仿真值 42.13 28.16 误差 9.51% −3.59% 得分率 81.2% 78%
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Shuang LIU, Li-xin CHEN, Jun-dong ZHANG, Lu-ming SHA, Zheng-lei YU, Tao XU, Qi ZHANG. Design and simulation of the dummy thoracic finite element model based on mashine vision[J]. Chinese Optics, 2023, 16(3): 673
Category: Original Article
Received: Jan. 1, 2023
Accepted: --
Published Online: May. 31, 2023
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