基于自紧弹工艺的自紧身管强度数值仿真分析  

Numerical Simulation Analysis on the Self-tightening Barrel Tube Using Self-Tight Shell Machining

作　　者：杜中华[1] 吴大林[1] 吴向东[1] DUZhonghua WU Dalin WU Xiangdong(Ordnance Engineering College, Shijiazhuang 050003, Chin)

机构地区：[1]军械工程学院,石家庄050003

出　　处：《机械工程师》2017年第8期49-51,共3页Mechanical Engineer

摘　　要：自紧身管是高膛压火炮普遍采用的身管,目前多采用液压和机械自紧方法。自紧弹自紧是一种较新的自紧方法,具有很高的效率,但是只能实现局部自紧。文中采用数值仿真方法,分析了某型火炮自紧弹自紧身管的相关问题,包括身管使用中要承受的最大压强、单筒身管和全长全塑身管的强度、自紧弹自紧身管的强度以及永久胀大比等。研究表明:单筒身管强度不能满足要求,自紧弹自紧后,身管膛底部分强度得到提高,身管各截面安全系数均大于1.2,自紧区域自紧度不超过0.45,膛线起始部永久胀大比不超过0.01%,自紧弹自紧身管能够满足强度要求。Self-tightening pipes are commonly used in high pressure guns, hydraulic and mechanical self-tightening methods are currently used. Self-tightening is a relatively new self-tightening method with high efficiency, but can only achieve partial self-tightening. In this paper, numerical simulation method is used to analyze the related problems of self-tightening and self-tightening of a certain type of artillery, including the maximum pressure when firing, the strength of single tube and full-length plastic body, tube strength and permanent expansion ratio. The results show that the strength of the single tube can not meet the requirements. The tube bottom part strength is improved, the safety factor of the cross section of the tube are greater than 1.2, self-tightening degrees of machining region are less than 0.45, and the permanent swell ratios of the rifle beginning area are less than 0.01%, so the self- tightening tube can meet strength demand.

关 键 词：自紧弹 自紧身管 数值仿真 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]