Detection Technology And The Evaluation Method Of The Dynamic Mechanical Properties Of Propellants

Evaluation for the accurate detection of dynamic mechanical properties of propellant, established the dynamic mechanical properties of propellant itself and Dynamicmechanical properties of propellant bed experimental setup and testevaluation. Droping hammer impact device using a single propellant grain for crash tests to detecte propellant dynamic mechanical properties of its own. Using High and low emission principle is to promote the loading test of launch vehiclepropellant. By controling the velocity of the launch vehicle propellant bed to exert impact and the corresponding compression to detecte of propellant mechanical properties of the bed. With closed bomb combustion experiments, researched and analysised before and after the initial impact propellant dynamic activitythan. Proposed fragmentation of propellant quantitative evaluation parameters and evaluation of the reference sample method is relatively. Choose a typical propellant samples were tested application of the evaluation. Studies have shown that:(1) Launch their own anti-drug state of the experimental impact test samples significantly affected the results. Samples should be revised before the experiment level processing Otherwise, the experimental result in large errors. Affected by moisture absorption study of fragmentation, fragmentation has little effecton moisture absorption, drug particles in the low temperature protection, do not need to be sealed(2) By studying the impact per unit area with fragmentation between the different drugson the drugs-shaped particles hit per unit area can be used as a propellant dynamic mechanical properties of its own evaluation criteria are more accurate.(3) Propellant bed through the establishment of evaluation methods and dynamic mechanical properties of experimental devices, the controllability analysis of experimental apparatus, according to changes in high-pressure chamber loadingdose control launch vehicle velocity possible, with the high pressure chamber to increase the amount of charge, vehicles to increase muzzle velocity. Range of 31.8m/s to 199.5m/s, Stability analysis of the experimental device, according to the same high-pressurechamber parallel to three rounds of data loading dose. poor speed control device range 3.5m/s to 4.5m/s, in line with device design requirements.(4) Through experiments and evaluation methods analyz different types of propellant. Propellant at low temperatures is fragile, yet it is strong plastic at normal temperature. Impact strength at low temperatures significantly lower than the normal temperature impact strength.