Research of missile MDO methods based on multi-granularity model

According to the requirement of modeling and simulation in MDO environment, with consideration of missile's Multidisciplinary Design Optimization problem, the necessity of modeling and simulation on multi-granularity model was analyzed. Taking pneumatic domain as an example, method of modeling and simulation on multi-granularity in missile's MDO environment was discussed. The integration methods of finite element software FLUENT and its pre-processing software GAMBIT were studied. Through abundant experiments, data results of computing multi-granularity model were given using three methods, namely Response Surface Analysis, engineering prediction method and numerical computation method. Finally, comparison of the data got from above and from wind tunnel test was analyzed. The study results show that modeling and simulation on multi-granularity model are significant to improve MDO efficiency.