复杂构型PBX截面密度分布CT测试方法  

CT Test Method for the Cross-section Density Distribution of PBX Component with Complex Configuration

作　　者：杨雪海[1] 张伟斌[1] 杨仍才[1] 王依全[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621999

出　　处：《含能材料》2016年第6期609-613,共5页Chinese Journal of Energetic Materials

基　　金：中国国防科技预研项目(426020502;426020603);中国工程物理研究院学科发展基金(2013B0203024)

摘　　要：高聚物粘结炸药(PBX)的密度均匀性对其力学性能和安全性能影响较大。用双标准同步CT扫描实验模型,测试复杂构型PBX的截面密度分布。采用与PBX相同构型的聚甲基丙烯酸甲酯(PMMA)、聚四氟乙烯(PTFE)作为标准密度件,以扇束扫描方式研究了PBX和标准密度件的截面CT值分布规律及线性关系,用MATLAB软件,通过灰度阈值和灰度值提取,得到不同截面的CT值。通过标准件体密度获得PBX的截面密度,利用排水法测得的PBX体密度计算修正系数k,对计算获得的PBX截面密度进行线性修正,获得复杂构型PBX不同高度的截面密度分布。结果表明,PBX截面密度与体密度的最大相对偏差为0.74%。The density uniformity of polymer bonded explosives （PBX） has a great effect on its mechanical property and safety performance. A dual-standard computed tomography simultaneous scanning model was applied to measure the cross-section density distribution of PBX component with complex configuration. Polymethyl methacrylate （PMMA） and polytetrafluoroethylene （PTFE） having same configuration of PBX were used as standard density components. The distribution rule of CT values and linear relation of the cross-section of PBX and standard density components were studied by a fan beam CT scanning mode. CT values of different cross-sections were obtained via the threshold of gray-scale and extraction of gray-scale value using MATLAB software. The cross-section density of PBX component was obtained from the volume densities of standard components. The corrected coefficient k was calculated using the volume density of PBX measured by water displacement method. The linear correction of the cross-section density of PBX component obtained by calculation was carried out. The cross-section density distribution of PBX component with complex configuration on different height was obtained. Results show that the maximal relative deviation between the cross-section density and the volume density of PBX is 0.74%.

关 键 词：高聚物粘结炸药(PBX) 密度分布 复杂构型 X射线CT(X—CT) 

分 类 号：TQ560.1[化学工程—炸药化工]