火炸药学报2018，Vol.41Issue(2)：178-185,8.DOI:10.14077/j.issn.1007-7812.2018.02.013
一种固体推进剂药柱结构完整性的快速评估方法
A Rapid Assessment Method of the Structural Integrity of Solid Propellant Grain
摘要
Abstract
To realize the rapid assessment of the structural integrity of solid propellant grain,starting with the dynamic modulus of propellant grain,a fast real-time assessment method for the equivalent modulus of solid propellant grain un-der dynamic load condition is established.Then,the concepts of temperature strain coefficient and pressure strain coef-ficient are put forward,a calculation model of the equivalent strain and equivalent stress of grain under dynamic load condition is set up,and the change of equivalent strain and equivalent stress of the dangerous position of grain at all times can be obtained,and the results are compared with finite element simulation ones based on linear viscoelasticity theory.The results show that the maximum difference between the equivalent strain and the equivalent stress of the dangerous position of grain under three kinds of curing cooling curves obtained by two calculation methods are 4.60%and 4.74%,respectively and the maximum difference between the equivalent strain and the equivalent stress of the dangerous position of grain obtained by two calculation methods under ignition pressurization curves are 1.93% and 1. 23%,respectively and the time required for the assessment method is greatly reduced,so the assessment method can be used for rapid assessment of structural integrity analysis of solid propellant grain.关键词
推进剂药柱/固化降温/点火增压/等效模量/结构完整性Key words
propellant grain/curing and cooling/ignition pressurization/equivalent modulus/structural integrity分类
军事科技引用本文复制引用
张路,余瑞,邓康清,庞爱民,杨玲..一种固体推进剂药柱结构完整性的快速评估方法[J].火炸药学报,2018,41(2):178-185,8.基金项目
湖北省技术创新重大专项(No.2016ACA180) （No.2016ACA180）
