不同间隙下的炮尾闭锁面的疲劳寿命计算  

Fatigue Life Calculation of Breech Locking Surface Under Different Clearances

作　　者：杨明光 曹广群[1] 李焕斌 刘鹏科 徐宏英 YANG Mingguang;CAO Guangqun;LI Huanbin;LIU Pengke;XU Hongying(School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China;Northwest Institute of Mechanical & Electrical Engineering, Xianyang 712099, China)

机构地区：[1]中北大学机电工程学院,太原030051 [2]西北机电工程研究所,陕西咸阳712099

出　　处：《兵器装备工程学报》2020年第12期108-112,共5页Journal of Ordnance Equipment Engineering

基　　金：国防科工局联合基金项目(6141B010321)。

摘　　要：通过建立自动机旋转闭锁机构在发射载荷下的有限元模型,将闭锁面之间的间隙等分为11组,求解出不同间隙工况下的炮尾闭锁面的动态强度,采用局部应力应变法对炮尾进行疲劳寿命计算。通过分析炮尾闭锁支撑面的冲击应力以及疲劳寿命的变化规律,得到炮尾闭锁支撑面与闩体之间最小间隙范围。计算结果可为闭锁机构的抗疲劳设计以及强度设计提供依据。The finite element model of the automatic mechanism locking mechanism under the launch load was established,and the gap between the locking surfaces was equally divided into 11 groups,and the dynamic strength of the locking surface of the breech under different clearance conditions was solved.The local stress-strain method was used to calculate the fatigue life of the breech.By analyzing the change law of impact stress and fatigue life of the locking surface of the breech,the gap range between the locking surface of the breech and breechblock has the least influence on the fatigue life of the breech.The calculation results can provide a certain basis for the anti-fatigue design and strength design of the locking mechanism.

关 键 词：间隙 自动机 闭锁面 动态强度 疲劳寿命 

分 类 号：TJ303[兵器科学与技术—火炮、自动武器与弹药工程]