关键词: 固体火箭发动机;稳态燃速~~+;驼峰效应~~+;侵蚀燃烧;最优化辨识~~+;混合优化方法~~+

Abstract: To predict the internal ballistic property of the solid rocket motor more accurately,the steady burning rate(2-D) model of the composite propellant was set up by taking into account the affect of the hump effect and erosive burning,the burning rate model parameter identification can be converted into nonlinear programming problem which can been solved by hybrid optimization method composed of Powell optimization method and genetic algorithms.The solution efficiency of the optimization problem can been improved by the distributed parallel performance of the genetic algorithms.The global optimum solution of the steady burning rate 2-D model parameter was gained.The optimization identification process and result are more robust with the model parameter initial value.Results show that the effect of the hump and erosive burning must been taking into account for experimental motor because of the high volumetric loading fraction,high length to diameter ratio,and low burning rate composite propellant.It also shows that steady burning rate 2-D model is feasible.

Key words: Solid rocket motor;Steady burning rate~+;Hump effect~+;Erosive burning;Optimization identification~+;Hybrid optimization method~+