丁羟推进剂微观结构的统计特性分析  

Statistical Character Analysis on Microstructure of HTPB Propellant

作　　者：马昌兵[1] 强洪夫[1] 武文明[1] 薛晶[2] 

机构地区：[1]西安第二炮兵工程学院,陕西西安710025 [2]四川大学口腔疾病研究国家重点实验室,四川成都610041

出　　处：《火炸药学报》2011年第3期52-56,共5页Chinese Journal of Explosives & Propellants

基　　金：国家安全重大基础研究项目

摘　　要：为了表征丁羟推进剂的微观组成,分别用微CT扫描和数值计算两种方法得到了其微观结构。在数学模型中,将固体颗粒模型化为圆形和球形,利用基于分子动力学方法的随机颗粒堆积算法分别建立了丁羟推进剂二维和三维微观结构,并用Monte-Carlo方法计算了各相的两点概率函数。结果表明,建立的数值微观模型具有各态历经性、统计平均性和各向同性的特点,丁羟推进剂微观结构的材料特征长度约为675μm。研究结果可为推进剂在微观尺度上的燃烧和力学分析提供数值模型。In order to characterize the conformation of HTPB propellant,microstructures of the propellant were obtained by MCT scanning and numerical method respectively.Solid particles in mathematic model were considered as disks and spheres,2D and 3D microstructure models of HTPB propellant were built up using a random packing algorithm based on molecular dynamics.Monte-Carlo method was used to calculate the two-point probability function of the numerical structure.The results show that the microstructure is ergodic,statistical homogeneous and isotropic.The statistical character length of HTPB propellant is 675 μm.The method offers numerical models to analysis of combustion and mechanics of HTPB propellant on microscale.

关 键 词：丁羟推进剂 微观结构 微CT 堆积 概率函数 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] V512[航空宇航科学与技术—航空宇航推进理论与工程]