摘要
某小口径火炮，自动机A的额定射速为550发／min，自动机B的额定射速为1000发／min。两种自动机身管的材料、内膛结构和工艺完全相同，使用弹药的弹道性能也相同。但在身管寿命考核试验中，采用相同的射击规范，自动机B的身管寿命仅为自动机A的64％～70％。以射击过程中身管外侧温度测试结果为基础，进行身管内膛温升的热分析计算，从身管温升角度探讨自动机B身管寿命降低的原因。根据射击过程中身管内膛温度不得超过其材料相变的临界温度点原则，制定合理的射击规范，符合身管的实际使用寿命。
For the small caliber automatic gun, normal firing rate is 550 rpm for type A and 1 000 rpm for type B. The material, bore shape and process scheme of barrels and using cartridge are entirely same for the two type automatic gun. But the life of barrel for type B automatic gun is 64%～70% of type A auto- matic gun in gun life test when adopting same firing specification. Heat analysis for the bore is made at the base of practically measured temperature at the barrel＇ s out surface in firing process, the reason of barrel life decrease is discussed by analyzing the increase of barrel temperature. Reasonable firing specification is made when the bore temperature can not exceed its material phase change critical temperature, thus it can increase the barrel practical life.
出处
《火炮发射与控制学报》
北大核心
2013年第3期1-5,共5页
Journal of Gun Launch & Control
关键词
小口径火炮
自动机
身管寿命
射击规范
热分析
small caliber gun
automatic mechanism
life of barrel
firing specification
heat analysis
