To Study the acoustic unsteady combustion of SRM,built the acoustic model of chamber.deduced the little amplitude sound wave 3D equation,used the finite volume discrete method to simulate.got the vibration model of three kinds of chamber.

• 为研究固体火箭发动机声不稳定燃烧特性；建立了燃烧室内声学特性分析的物理数学模型；推导了小振幅声波三维波动方程；采用有限体积离散方法进行仿真；得到圆柱型、四片翼柱彤和五片翼柱型药柱三种燃烧室形状声学振动基本模态.