温湿度应力对火工品金属桥带温度场影响的仿真与试验研究  

Simulation and Experimental Research on the Effect of Temperature and Humidity Stress on Temperature Field of Metal Bridge Belt of Pyrotechnic Product

作　　者：张宸赫 张蕊[1] 付东晓[1] ZHANG Chen-he;ZHANG Rui;FU Dong-xiao(Science and Technology on Applied Physical Chemistry Laboratory,Shaanxi Applied Physics and Chemistry Research Institute,Xi’an 710061,China)

机构地区：[1]陕西应用物理化学研究所应用物理化学重点实验室,西安710061

出　　处：《装备环境工程》2022年第2期20-26,共7页Equipment Environmental Engineering

摘　　要：目的研究火工品换能元所用的金属桥带表面划痕等缺陷在温湿度应力作用下的扩展情况及其对火工品功能的影响。方法设计温湿度为80℃/95%的双应力试验,采用形貌分析和红外热波等手段,结合仿真计算,研究温湿度应力对划痕尺寸的影响及其对换能元桥区温度场的影响规律。结果金属桥带在温湿度应力的作用下,180 d的试验时间内,表面无划痕样品未出现明显缺陷,温度场分布和温升曲线也与试验前保持一致。划痕样品的划痕宽×长由试验前的0.015 mm×0.01 mm扩展到试验后的0.020 mm×0.015 mm,桥区最高温度由试验前的187.5℃上升到试验后的237℃。红外试验结果和仿真计算结果趋势一致。结论温湿度应力会加速桥带表面划痕的扩展,并在桥区心集热区产生温度聚集,影响发火时间和发火可靠性。This paper is to study the temperature and humidity stress expansion of the metal bridge belt surface scratches and other defects used in pyrotechnic energy conversion elements and its influence on the function of the pyrotechnics. The influence of temperature and humidity stress scratch size and its influence on the temperature field in the bridge area of the energy conversion element are studied by designing temperature and humidity double stress 80 ℃/95% test using temperature and humidity test and using the topographic analysis and infrared thermal wave experiments combined with simulation calculation.Under the action of temperature and humidity stress, the non-scratched samples on the surface of the metal bridge belt did not have obvious defects within the test time of 180 days, and the temperature field distribution and temperature rise curve were also consistent with those before the test;the width × length of the sample with scratches on the surface extends from 0.015×0.01 mm before the test to 0.020×0.015 mm after the test, and the maximum temperature value of the bridge area rises from 187.5 ℃ before the test to 237 ℃ after the test;at the same time, the trend of infrared test results and simulation calculation results is consistent. The temperature and humidity stress will accelerate the expansion of scratches on the surface of the bridge belt, and generate temperature accumulation in the heat collecting area in the center of the bridge area, which affects the ignition time and ignition reliability.

关 键 词：火工品 换能元 温湿度试验 红外热波试验 仿真计算 

分 类 号：TJ450.2[兵器科学与技术—火炮、自动武器与弹药工程]