固体火箭发动机前、后翼药柱三维有限元分析

THREE-DIMENSIONAL FINITE-ELEMENT ANALYSIS FOR FORE AND AFT FINOCYL GRAIN OF SOLID ROCKET MOTOR

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

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

摘要:

应用PRO／ENGINEER、I－DEAS软件构造药柱三维几何模型，利用视算技术和方法对药柱几何模型进行处理，建立药柱三维有限元模型，对药柱受固化降温、轴向飞行过载、工作内压载荷作用下的应力应变及位移完成了三维线弹性有限元分析计算，进行了图形后处理，得到了合理的结果。为大型固体火箭发动机药柱结构完整性分析提供了更为准确合理的理论依据。

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.