One new-style powder-installed structure of small fore-and-aft dimension

namely series-wound beforehand loading system

was brought forward according as projecting basic principle of hyper firing-rate weapon.The system could solve the problem of pressurization of powder burning gas and cylindrical powder intensity of bullet.On the basis of that

a mathematical model of interior ballistic was established by the classical interior ballistic theory

the process of interior ballistic was numerically simulated by Matlab7.1 language

and the influence regularities of the variations of firing rate upon the interior ballistic performance were analyzed.The results indicate that the different physical locations of all bullet in gun result in the change of maximum pressure and muzzle velocity in non-coupling firing conditions

the frontal bullet resistance plays an important part in weak coupling firing conditions to the interior ballistic characteristics and conduces the biggish change of maximum pressure and muzzle velocity.