| The development of modern high performance weapon has been seriously restrained duo toits launch safety proplem, which has becom the world problem and greatly attended byballistician at home and abroad. The theory, simulation and experiment of launch safety arestudied in this paper. Simulation experiments are accomplished and the status ofcombustion and mechanics of charge bed near projectile base in chamber are obtainedusing the phycial simulation system of combustion and mechanics of propellant charge.The control equations of semi-closed bomb are established and the controllability ofpressure in semi-closed bomb is studed. The fractured propellants are gained underdifferent test condition using the dynamic extrusion and fracture phycial simulation system.The fracture process of propellant bed is repeated under the simulated chamberenvironment. The token method for the fracture degree of propllenat is put forward throughintroducing initial dynamic vivacity ratio. The initial surfaces of a few kinds of propellantsafter fracture are numerical simulated. The relationship between the maximal extrusionforce and the fracture degree of propellant is gained through dynamic vivacity experiment.The two-phase flow method accompany propellant fracture is studied, and the influence ofabnormity pressure caused by propellant fracture and ignition condtion are analysed. |
