Solid rocket motor is a very complex system

and it plays an important role in the weapon system design.The engine performance is mainly tested by experimental.Engine Test System is a complex and expensive.Based on numerical simulation

the performance of a solid rocket motor was analyzed

which included two steps.First

charge design and internal ballistic calculation of solid rocket motor were adopted by fourth-order Runge-Kutta method

and then cross flow of initial charge channel and charge structural integrity under lower temperature and higher pressure were analyzed by finite volume method and the linear viscoelastic theory respectively.The numerical results are more consistent with the experimental data.The analysis methods of solid rocket engine have a certain reference value for new product development and demonstration.