迫击炮复合材料座钣多工况多目标优化

Multi-objective Optimization of Composite Base-plate of Mortar Under Multi-operating Conditions

未来信息化战争对迫击炮射程、射击精度、机动性等核心指标提出了很高要求,迫击炮座钣的轻量化设计已成为迫击炮轻量化设计的研究热点。复合材料因具有强度高、质量轻、耐冲击等优点在座钣设计上得到了应用。为保证复合材料座钣的强度和稳定性,拓展复合材料座钣的适用工况,采用多目标聚合方法,以座钣沿炮膛轴线方向的位移、侧方向的位移、复进阶段反跳程度、炮口振动状态和座钣质量为优化目标,开展了迫击炮复合材料座钣多工况多目标研究。采用BP神经网络方法,构建近似代理模型,并进行模型验证和可信评估,基于代理模型,利用遗传算法对优化问题进行求解。考虑复合材料层合板的材料特性,对复合材料座钣进行优化设计,达到其射击稳定性和机动性之间的最佳匹配,提高迫击炮复合材料座钣的综合性能。综合比较黏土、中硬土和坚硬土3种工况下复合材料座钣的强度和射击稳定性,结果表明该研究方法对迫击炮的轻量化设计具有一定的参考价值。

The future information warfare has put forward high requirements for core indicators such as the range,shooting accuracy and maneuverability of mortars,and the lightweight design of base-plates has become a research hotspot in the lightweight design of mortars.Composite materials are applied in base plate design due to their advantages such as high strength,light weight,and impact resistance.In order to ensure the strength and stability of composite material base-plates,and expand the applicable working-conditions of composite material base-plates,a multi-objective aggregation method was adopted to optimize the displacement of the base-plate along the axis direction of gun barrel,the displacement in the lateral direction,the degree of rebound during the re-entry stage,the vibration state of the muzzle,and the quality of base-plate.A multi-objective study on the multi working-conditions of composite material bas-plates for mortars was carried out.Using the BP neural network method,an approximate surrogate model was constructed,and model validation and trustworthiness evaluation were carried out.Based on the surrogate model,genetic algorithms were used to solve optimization problems.Considering the material characteristics of composite laminates,the optimal design of composite base-plates was carried out to achieve the best match between shooting stability and maneuverability,and improve the comprehensive performance of mortar composite base-plates.The strength and shooting stability of composite material base-plates under three working-conditions of clay,medium hard soil and hard soil were comprehensively compared.The result indicates that the research method in this paper can offer certain reference for the lightweight design of mortars.