新型活塞式中心抛撒机构的内弹道仿真研究

为了保证子弹在低过载抛撒环境下能得到较高的子弹抛撒速度，设计了一种新型的活塞式中心抛撒机构，对这种抛撒机构的工作过程进行了研究。这种新型活塞式中心抛撒机构通过带有斜面的弹托来传递活塞对子弹的推力，高压室燃烧低压室做功等方式，降低了初始的推力峰值，实现抛撒过程的低过载。根据此种抛撒机构的工作原理，对活塞、弹托及子弹等进行受力分析，建立了此种抛撒机构的内弹道模型，采用此模型对其内弹道性能进行仿真研究。计算得出，该种新型抛撒机构能提供大于50m/s的抛撒速度并将子弹过载控制在1000g以下。所建立的内弹道模型对此种新型活塞中心抛撒机构的设计具有参考意义。

A Simulation Study of the Interior Ballistics of the New Piston Central Dispersing Machine

In order to ensure high dispersing velocity of the submunitions in the low overload dispersing environment, a new piston central dispersing mechanism was devised and working process of the dispersing mechanism was researched. The characters of this kind of mechanism were as follows: the trust force from the piston to the submunition was transmitted by the beveled sabot; the powder burned in the high pressure chamber and the generated powder gas did work in the low pressure chamber; the initial trust peak was reduced, and so on. According to the working principle of the piston central dispersing mechanism, the force analysis of piston, sabot and submunitions were carried out, and the interior ballistics model of the new mechanism was established. It is proved by the simulation calculation that, this new piston central dispersing mechanism not only can supply a dispersing velocity more than 50m/s, but also can control the overload of submunitions under 1000g. The interior ballistics model can be used to guide the design of the new piston central dispersing mechanism.