Abstract: The launch safety problem of gun propellant charge has severely restricted the development of modern gun, and has already become major theoretical and technical problems which has attracted considerable attention. A new concept, namely the initial dynamic vivacity ratio of propellant charge is presented based on 17 years of profound research on theoretical analysis, computation and test which reveals the mechanism of bore premature caused by propellant charge. The industry standard and military standard of launch safety evaluation method were set up. The evaluation principle of launch safety for propellant charge, the evaluation process of launch safety for propellant charge, the mechanics environment test method of propellant charge in chamber, the test method of dynamic stress and fracture of propellant charge, the test method of initial dynamic vivacity ratio of propellant charge, the approach to determine the criterion of launch safety for propellant charge, and the evaluation method of launch safety for propellant charge are introduced. The methods have been in the engineering practice successfully. The theoretical basis, technical approaches and technical standards are provided for the scientific evaluation of launch safety of propellant charge.

Key words: ordnance science and technology, propellant charge, launch safety, evaluation method, initial dynamic vivacity ratio, test research, criterion