变温速率及药柱尺寸对压制药柱热环境适应性的影响研究  

Study on the Influence of Temperature Change Rate and Grain Size on the Thermal-environmental Adaptability of Compressed Cylindrical Explosive

作　　者：耿宇辰 张丁山[1] 高金霞[1] 徐笑 GENG Yu-chen;ZHANG Ding-shan;GAO Jin-xia;XU Xiao(Xi’an Modern Chemistry Research Institute,Xi’an,710065)

机构地区：[1]西安近代化学研究所,陕西西安710065

出　　处：《火工品》2024年第1期81-86,共6页Initiators & Pyrotechnics

基　　金：国防重大基础研究专项。

摘　　要：为探究变温速率及药柱尺寸对压制药柱热环境适应性的影响,对不同变温速率下HMX压制药柱的裂纹产生情况进行了试验研究,并对不同变温速率和药柱尺寸条件下药柱内部典型位置的热应力进行了仿真,研究了药柱内部热应力的分布特性和变化规律,提出了减少裂纹的改进措施并进行了试验验证。结果表明:随着变温速率增大,药柱内部热应力的变化速率也增大;药柱内部热应力分布基本上呈由外到内先减小再升高的趋势,应力差最大区域为药柱高度和截面的1/4处,该区域最容易产生裂纹;加装衬层可以有效降低药柱内部变温速率,提升药柱的环境适应性。In order to study the effects of temperature change rate and cylindrical explosive size on the thermal environment adaptability of compressed cylindrical explosive,experimental study were conducted on the crack generation of HMX compressed cylindrical explosive under different temperature change rates,and the thermal stress at typical positions inside the cylindrical explosive under different temperature change rates and cylindrical explosive size conditions were simulated.The distribution characteristics and variation rules of thermal stress inside the cylindrical explosive were studied,the improvement measures to reduce cracks were proposed and verified through tests.The results show that with the increase of the temperature change rate,the change rate of stress in the grain increases;The distribution of thermal stress inside the cylindrical explosive basically shows a trend of decreasing and then increasing from the outside to the inside,the region of maximum stress difference is at 1/4 of grain height and cross-section of the cylindrical explosive,which is the most prone to cracking.Adding a lining layer can effectively reduce the temperature change rate inside the cylindrical explosive,thereby improving the environmental adaptability.

关 键 词：压制药柱 温度循环 热环境适应性 热应力 变温速率 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ564[化学工程—炸药化工]