武器发射弹体内塑料弹带强度优化设计仿真  

Optimal Design and Simulation of the Strength of the Plastic Belt in the Missile Launcher

作　　者：唐红春[1] 王璐[1] 史永高[2] 

机构地区：[1]西安工业大学北方信息工程学院,陕西西安710200 [2]西安工业大学教学督导团,陕西西安710032

出　　处：《计算机仿真》2017年第7期10-13,72,共5页Computer Simulation

摘　　要：对武器发射弹体内塑料弹带强度的优化设计,可以有效提高塑料弹带性能。对弹带强度优化设计,需要先得到塑料弹带应力分布载荷,计算出螺纹底部的最大主应力,完成弹带强度优化模型设计。传统方法利用改进的特征曲线,确定拉伸特征长度和压缩特征长度,但忽略了螺纹底部的最大主应力的求取,导致设计效果不理想。提出组建基于三维有限元的武器发弹体内塑料弹带强度优化模型方法。首先组建身管膛线及弹丸的三维模型,给出火药气体压力最大阶段武器发射弹体内塑料弹带所受压力值,计算出该作用力下弹托中性轴上的最大剪应力以及弹托后定心部相应的最大弯曲正应力,得到塑料弹带分布载荷,计算出螺纹底部的最大主应力,获得最大膛压时的应力应变关系以及屈服应力,由此完成发射弹体塑料弹带强度优化模型设计。实验结果表明,所提模型弹带强度分析精度较高,为塑料弹带结构设计的安全性评价提供了依据。This article proposes a method for strength optimization model of plastic belt in weapon launch projec- tile based on three-dimensional （3D） finite element. Firstly, we built a 3D model for pipe rifling and pill and pro- vided pressure value of the plastic belt at stage of maximum gas pressure of gunpowder, then worked out maximum shear stress of sabot neutral axis and corresponding maximum bending stress of back guide band of sabot under the pressure and obtained distributed load of the plastic belt. Moreover, we worked out maximum principal stress of bot- tom of thread and obtained stress-strain relationship and yield stress under maximum chamber stress. Experimental results show that the model has higher precision of strength analysis. It provides gist for evaluating security of structur- al design of the plastic belt.

关 键 词：发射弹体 塑料弹带 弹带强度 

分 类 号：TJ413.6[兵器科学与技术—火炮、自动武器与弹药工程]