固体火箭发动机药柱结构性能参数不确定性量化及瞬时可靠性分析

Solid propellant is an important part of solid rocket motor. The reliability of propellant column structure is directly related to the reliability of rocket engine. Firstly, the performance parameters of the cylinder structure were tested with EPLEXOR dynamic mechanical thermal analyzer and vic-3d visual test bench. Secondly, grey theory is used to quantify the relaxation modulus and poisson\'s ratio. Finally, the instantaneous reliability of the cylinder structure is analyzed by using the evidence theory, and compared with the Monte carlo results to verify the effectiveness of the proposed method. This paper provides a new idea for reliability analysis of charge column structure.