| 固体火箭发动机药柱大变形数值分析 |
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| 引用本文： | 张建伟,孙冰.固体火箭发动机药柱大变形数值分析[J].固体火箭技术,2004,27(4):284-288. |
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| 作者姓名： | 张建伟 孙冰 |
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| 作者单位： | 北京航空航天大学宇航学院,北京,100083 |
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| 摘 要： | 综合考虑固体发动机药柱的近似不可压缩性和几何非线性,基于不可压缩材料的粘弹性本构关系,应用完全拉格朗日(T.L)法的虚功方程,推导了二维粘弹性几何非线性有限元的增量列式,编写了有限元程序并与算例进行了对比,并对星型药柱在受压力载荷作用下的结构进行了分析。结果表明,该方法和程序可用于所有泊松比粘弹性问题的计算,尤其适用于推进剂药柱的应力分析。
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| 关 键 词： | 固体推进剂火箭发动机 药柱 有限元 不可压缩性 大变形 |
| 文章编号： | 1006-2793(2004)04-0284-05 |
| 修稿时间： | 2004年5月25日 |
Numerical analysis on large deformation of propellant grains for solid rocket motors |
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| ZHANG Jian-wei,SUN BingSchool of Astronautics,Beijing Univ. of Aeronautics and Astronautics,Beijing,China..Numerical analysis on large deformation of propellant grains for solid rocket motors[J].Journal of Solid Rocket Technology,2004,27(4):284-288. |
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| Authors: | ZHANG Jian-wei SUN BingSchool of Astronautics Beijing Univ of Aeronautics and Astronautics Beijing China |
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| Institution: | ZHANG Jian-wei,SUN BingSchool of Astronautics,Beijing Univ. of Aeronautics and Astronautics,Beijing100083,China. |
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| Abstract: | Near-incompressibility and nonlinearity of propellant grains for solid rocket motors were considered. Based on incompressible viscoelastic constitutive relationship and virtualwork equation of Total Lagrangian, a two-dimensional viscoelastic geometry nonlinear finite element incremental relationship was derived. Finally finite element program was complied and its results were compared with that of calculation case,in addition,structure of star-shaped grain under the pressure load was analyzed. The results show that approach and program are valid for stress analysis of viscoelastic materials with all admissible values of Poisson's ratio and particularly for stress analysis of solid propellant grains. |
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| Keywords: | solid propellant rocket engine grain finite element incompressibility large deformation |
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