GAO Yu-ling, CHEN Xing-quan, LIU Yan-ping, ZHANG Feng, ZHANG Jing
（Xi’an Modern Chemistry Research Institute, Xi’an 710065, China）
Abstract： Uniformity of warhead axial charge and influences of different warhead wall thicknesses on measurement results were studied by industrial computed tomography (CT). By comparing the differences of relative density values of the same simulation charge sample assembled in simulation bodies with different wall thicknesses, effects of warhead wall thickness on charge CT relative density values were analyzed. The results show that CT value increases by about 1% with the increase of each additional 1 mm of wall thickness under the same simulation charge for the projectile with outer diameter of 100 mm and internal diameter of 90 mm. Therefore, to detect uniformity along warhead axial (upper, middle and lower sections) charge density with in penetration ability range of industrial CT (ICT), the CT values of various parts (upper, middle and lower sections) may be only measured without measuring absolute density of charge. By subtracting changes in the CT values caused by warhead wall thickness variation, the CT values of various parts under the same charge can describe warhead axial charge uniformity.
Key words： industrial computed tomography (ICT); charge density; warhead wall thickness
CLD number： TJ410.3+4Document code： A
Article ID： 1674-8042（2017）01-0009-08 doi： 10.3969/j.issn.1674-8042-2017-01-002
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工业CT检测中弹壁厚度对装药均匀性
测量结果的影响高玉玲， 陈兴泉， 刘艳萍， 张峰， 张晶
（西安近代化学研究所 十一部， 陕西 西安 710065）
摘要:利用工业CT技术检测弹体轴向装药均匀性以及弹壁厚度变化对测量结果的影响， 对比了同一模拟装药样件装配在不同壁厚的模拟弹体内时CT相对密度测试结果的差异， 并分析了弹壁厚度对装药CT相对密度值的影响。 结果表明， 对于弹体外径约100 mm、 内径约90 mm的样品， 弹壁厚度每增加1 mm， 同一装填材料的CT值数据随之增加约1%左右。 因此， 为检测弹体轴向（即上段、中段、下段）装药密度均匀性， 在工业CT设备穿透能力范围内， 不用测出装药的绝对密度， 只需检测上、中、下各个部位的装药CT值， 并减除弹壁厚度变化量对CT值产生的影响量， 通过比较上、中、下各个部位装药最终的CT值就可获得弹体轴向装药的密度均匀性。
关键词:工业CT； 装药密度； 弹壁厚度
引用格式：GAO Yu-ling, CHEN Xing-quan, LIU Yan-ping, et al. Effect of warhead wall thickness on charge uniformity in industrial CT detection. Journal of Measurement Science and Instrumentation, 2017, 8(1)： 9-16. ［doi： 10.3969／j.issn.1674-8042.2017-01-002］
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