磨料水射流切割复合固体推进剂的机理与过程安全性研究

本项目以复合固体推进剂（HTPB）为研究对象，根据连续介质力学和有限元理论，通过给出磨料水射流中磨料颗粒和推进剂作用的控制方程及相应的有限元列式，建立适用于磨料水射流切割推进剂全过程分析的损伤模型，并根据磨料粒子与推进剂相互作用过程的两个阶段，即动态加载过程和准静态加载过程中碰撞升温和粘性加热的计算结果，设置点火临界条件与控制安全参数的方法，研究推进剂受磨料射流冲击引起热起爆的机制。通过试验验证在磨料水射流作用下推进剂表面及内部温度及压力、静电等危险因素的变化情况，有针对性的对过程安全性进行定量说明，进而建立冲击的危险性—临界点火条件与射流参数之间的关系。在此基础上，通过正交试验和单因素试验进行切割效率的评价，优化安全切割条件下的水力和射流参数。该研究可为磨料水射流应用于报废固体导弹武器的安全处理与再利用提供技术支持，对提高处理效率和防范爆炸性气溶胶的产生具有重要意义。

This project take HTPB composite solid propellant for the study, based on continuum mechanics and finite element theory, by giving the corresponding effect of finite element formulation between abrasive particles in abrasive water jet and propellants equations and establishment suitable for abrasive water jet cutting propellant damage model analysis of the whole process. Safety of the abrasive particles according to a two-stage interaction with the propellant, i.e. quasi-static and dynamic loading during collision loading viscous heating and heating simulation results, mainly critical condition and the ignition control method for security parameters Verify that the propellant caused by abrasive jet impingement heat detonation mechanism. Experimental verification role in the change of abrasive water jet propellant surface and internal temperature and pressure, static and other risk factors through targeted water jet important parameters, such as pressure, flow, target distance, abrasive proportion and size, etc. quantitatively described, thereby establishing the impact of risk the relationship between the critical ignition conditions and jet parameters. On this basis, by orthogonal and single factor test cutting efficiency evaluation and optimization of water jet cutting parameters under the safety conditions. The study can be applied to the abrasive water jet scrapped missile weapons safe disposal of solid and reuse to provide technical support, which is important to improve process efficiency and prevent explosive aerosol generation.