关键词: 固体推进剂火箭发动机;推进剂药柱;结构完整性;有限元法

Abstract: Three-dimensional finite-element modeling and calculation analysis method for fore and aft finocyl grain of large scale solid rocket motor are researched. Using PRO/ENGINEER and I-DEAS softwares, a three-dimensional grain geometry model is constructed, in which the visual calculation technology and method are used, then the three-dimensional finite-element model of grain is established. For vulcanization cool down and axial flight acceleration, as well as operating pressure of the grain, the three dimensional linear elasticity finite-element analyses of stress, strain and displacement are accomplished, the post-processing images are accomplished and reasonable results are obtained. Thus, the problem of three-dimensional finite-element analysis of large-scale solid rocket motor grain with various loads is possible to be solved. It supplies a more accurate and reasonable method for the construction integrity analysis of large-scale solid rocket motor grain.

Key words: Solid propellant rocket engine;Propellant grain;Structural integrity;Finite element method