Designing and Analyzing Performance of Lattice Energy Absorbing Device for Anti-impact Hydraulic Support
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摘要: 为提高防冲液压支架的让位吸能大小, 提高防冲液压支架的安全性, 设计一种点阵让位吸能装置。采用有限元仿真的方式分别研究3种典型点阵胞体的比吸能及单位质量支撑力, 确定金字塔结构为最佳拓扑胞体结构。采用三因素五水平的正交实验分析胞体高度, 胞体立足倾斜宽度及胞体立足直径对点阵芯体的吸能大小及支撑力的影响规律, 确定最佳的胞体结构参数。通过仿真分析得到最佳结构参数的金字塔点阵吸能装置的总吸能为1 470 kJ, 支撑力为4 679.76 kN, 且支撑力较平稳。证明金字塔结构点阵吸能装置具有优越的吸能性, 能够提高防冲液压支架的安全性。Abstract: In order to increase the energy absorption of the anti-impact hydraulic support and improve its safety, a lattice energy-absorbing device was designed. The specific energy absorption and unit mass support force of three typical lattice cells were studied with the finite element simulation. The pyramid structure was determined to be the best topology of the lattice cells. The three-factor and five-level orthogonal experiment was used to analyze the influence of their body height, body inclination width and body diameter on energy absorption and support force and to determine the best body structural parameters. The simulation analysis shows that the total energy absorption of the pyramid lattice energy absorbing device with the best structural parameters is 1 470 kJ and that its support force is 4 699.76 kN. The support force changes relatively smoothly. It proves that the lattice energy-absorbing device with the pyramid structure has superior energy absorption and can improve the safety of the anti-impact hydraulic support.
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Key words:
- anti-impact hydraulic support /
- safety /
- lattice structure /
- orthogonal test
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表 2 正交实验样本及结果
序号 h/mm a/mm d/mm 吸能/kJ 支撑力/kN 1 5 1 2 896.8 26 116.0 2 3 3 5 189.1 4 114.2 3 1 2 4 137.6 4 330.1 4 4 2 1 233.6 3 599.4 5 5 2 5 751.0 18 548.5 6 4 1 3 960.0 26 212.4 7 3 1 4 766.7 28 276.0 8 5 4 1 261.3 1 262.3 9 3 4 3 78.5 1 488.3 10 3 5 1 145.7 1 287.7 11 1 4 5 100.6 9 913.8 12 4 4 2 87.9 1 607.4 13 1 5 3 38.5 1 560.6 14 2 5 2 12.4 508.5 15 4 5 5 163.1 2 632.2 16 4 3 4 267.3 4 525.1 17 5 3 3 217.3 4 598.8 18 2 4 4 106.6 1 474.9 19 2 3 1 111.1 514.1 20 5 5 4 226.8 3 259.7 21 2 1 5 496.3 28 670.9 22 1 3 2 14.8 321.8 23 1 1 1 152.6 3 617.1 24 2 2 3 197.4 3 040.1 25 3 2 2 293.8 5 027.3 
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表 3 吸能大小的影响极差
因素h 因素a 因素d K1 88.82 654.48 180.86 K2 184.76 322.68 261.14 K3 294.76 159.92 298.34 K4 342.38 126.98 301.00 K5 470.64 117.30 340.02 极差R 381.82 537.18 159.16
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表 4 支撑力的影响极差
因素h 因素a 因素d K1 3 948.68 22 578.48 2 056.12 K2 6 841.70 6 909.08 6 716.20 K3 8 038.70 2 814.80 7 380.04 K4 7 715.30 3 149.34 8 373.16 K5 10 757.06 1 849.74 12 775.92 极差R 6 808.38 20 728.74 10 719.80
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