目的 解决制导弹药在运输与储存过程中包装箱因跌落冲击和堆码承载导致结构失效的选材难题,系统评估木质、塑钢、Q345结构钢和碳纤维复合材料4种方案在典型工况下的力学性能,为航空弹药包装箱的合理选材提供定量依据。方法 以某型空面制导弹药包装箱为研究对象,分别建立4种材料的三维有限元模型,壁厚依据力学特性、工程实践及重量约束设定为木质20 mm、塑钢8 mm、金属（Q345）2.5 mm、碳纤维3 mm（8层[0°/±45°/90°]ₛ铺层）。跌落冲击仿真基于ANSYS Explicit Dynamics模块,参照GJB 2711—96设定0.3、0.5、0.8、1.0、1.2、1.5 m共6组跌落高度,每组包含面跌落、棱跌落和角跌落3种姿态,地面摩擦系数为0.3。堆码承载分析采用静力学方案,参照GB/T 4857.3和GB 12463—2009设定2层（1.90 m）、3层（2.85 m）、4层（3.80 m）、5层（4.75 m）、6层（5.70 m）共5组工况,以安全系数S=σy/σmax作为结构安全性评价指标。结果 在1.5 m临界角跌落工况下,木质箱体的峰值等效应力为88.5 MPa（安全系数S=0.47）、塑钢箱体为62.8 MPa（S=0.41）,均超出各自屈服强度,存在结构失效风险;金属箱体为138.5 MPa（S=2.49）、碳纤维箱体为78.5 MPa（S=7.64）,满足承载要求。在4层堆码（3.80 m）极限工况下,木质箱体的峰值应力为46.2 MPa（S=0.91）、塑钢箱体为32.8 MPa（S=0.79）,均不满足安全要求;金属箱体为65.8 MPa（S=5.24）、碳纤维箱体为36.5 MPa（S=16.44）,安全储备充足。结论 碳纤维复合材料在跌落和堆码2种极限工况下均展现出最优的结构性能,兼具高强轻量优势,是制导弹药包装箱材料的理想选择;Q345结构钢综合性能次之,适用于常规弹药运输场景;木质和塑钢包装箱在标准规定的临界工况下存在失效风险,若需采用应辅以结构加强措施。
Abstract
The work aims to systematically evaluate and compare the mechanical performance of wood, plastic-steel (HDPE), Q345 structural steel, and carbon fiber reinforced polymer (CFRP) for guided ammunition packaging boxes under typical conditions, and solve the material selection challenge of structural failures of guided ammunition packaging boxes during transportation and storage due to drop impact and stacking load, so as to provide a quantitative basis for material selection. A three-dimensional finite element model of a certain air-to-surface guided ammunition packaging box (dimensions: 5 066 mm×905 mm×950 mm, total mass: 1 110 kg) was established for each of the four materials, with wall thicknesses set according to mechanical properties: wood 20 mm, HDPE 8 mm, steel 2.5 mm, and CFRP 3 mm (8-layer [0°/±45°/90°] layering). Drop impact simulations were conducted using the ANSYS Explicit Dynamics module at six drop heights (0.3, 0.5, 0.8, 1.0, 1.2, and 1.5 m) with three drop postures (face, edge, and corner) per height, with reference to GJB 2711-96, with a ground friction coefficient of 0.3. Static stacking load analysis was performed at five stacking levels (2-layer (1.90 m), 3-layer (2.85 m), 4-layer (3.80 m), 5-layer (4.75 m), and 6-layer (5.70 m)) per GB/T 4857.3 and GB 12463—2009. The safety margin S = σy/σmax was adopted as the structural safety evaluation index. Under the 1.5 m critical corner drop condition, the wood box exhibited a peak stress of 88.5 MPa (S=0.47) and the plastic-steel box 62.8 MPa (S=0.41), both exceeding their respective yield strengths and indicating structural failure risks; the steel box showed 138.5 MPa (S=2.49) and the CFRP box 78.5 MPa (S=7.64), satisfying the bearing requirements. Under the 4-layer stacking (3.80 m) limit condition, the wood box reached 46.2 MPa (S=0.91) and the plastic-steel box 32.8 MPa (S=0.79), both failing to meet safety criteria; the steel box reached 65.8 MPa (S=5.24) and the CFRP box 36.5 MPa (S = 16.44), with ample safety reserves. CFRP demonstrates the best structural performance under both limit conditions, combining high strength and light weight, making it the ideal material for guided ammunition packaging boxes; Q345 structural steel is a viable alternative for conventional ammunition transport; and wood and plastic-steel boxes carry failure risks under critical conditions and require structural reinforcement if adopted.
关键词
弹药包装箱 /
有限元仿真 /
跌落冲击 /
堆码承载 /
材料对比
Key words
ammunition packaging box /
finite element method /
drop impact /
stacking bearing /
material comparison
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