根据所用粒状药内外弧厚不同的特点，推导了该粒状药二项式与三项式的形状函数，并进行了比较．建立了粒状药与管状药组成的混合装药的多相流内弹道理论模型，编制工程实用的软件系统．数值预报射击过程膛内物理量变化的详细结果．该研究结果对于指导装药设计、弹丸设计与身管设计都具有重要的理论参考价值与工程实际意义 According to the different characteristics of granular drug used inside and outside the arc thickness, the shape function of the granular drug binomial and the trinomial is deduced and compared. A multiphase flow interior ballistic theory model of mixed charge consisting of granular drug and tubular drug was established and a practical software system was constructed. Numerical results of the numerical changes in the bore during shooting are detailed. The results of this study have important theoretical reference value and engineering practical significance for guiding charge design, projectile design and management design