| 大长径比自旋弹箭横向自振特性的有限元计算方法与结果分析 |
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| 引用本文： | 荣吉利,李瑞英.大长径比自旋弹箭横向自振特性的有限元计算方法与结果分析[J].兵工学报,2002,23(1):79-82. |
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| 作者姓名： | 荣吉利 李瑞英 |
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| 作者单位： | 1. 北京理工大学应用力学系,北京,100081
2. 兵器工业系统工程研究所 |
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| 摘 要： | 本文研究大长径比自旋弹箭在飞行时横向振动的自振特性。本文将转子动力学应用于弹道学 ,采用有限元法 ,建立自旋弹箭横向振动自振特性方程。同时给出了计算方法。利用该方程和该方法 ,开发了相应的计算程序。通过数值计算 ,可给出细长旋转弹箭飞行时的进动转速和临界转速 ,以及相应的位移和角度振型。利用该程序 ,进行了实例计算和分析。
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| 关 键 词： | 弹箭 横向振动 自振特性 有限元法 |
| 修稿时间： | 2001年4月1日 |
FINITE ELEMENT COMPUTATIONAL METHOD AND RESULTANT ANALYSIS OF THE TRANSVERSE SELF-OSCILLATION CHARACTERISTICS OF A SLENDER SPINNING ROCKET |
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| Rong Jili.FINITE ELEMENT COMPUTATIONAL METHOD AND RESULTANT ANALYSIS OF THE TRANSVERSE SELF-OSCILLATION CHARACTERISTICS OF A SLENDER SPINNING ROCKET[J].Acta Armamentarii,2002,23(1):79-82. |
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| Authors: | Rong Jili |
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| Abstract: | The transverse self oscillation characteristics of a spinning rocket in flight was studied. Rotordynamics is applied in the analysis. The dynamic equation of transverse vibration of spinning rockets was presented with the finite element method.Numerical method of the equation was also given. By this given equation and method a numerical program was developed. The precessing speeds,critical speeds, including the relevant deflection modes and angular modes of a slender spinning rocket or projectile can be computed by this program.Some numerical analysis of the precession speed,critical speed, as well as the deflection modes and angular modes is made for sample projectiles. |
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| Keywords: | rocket transverse vibration self oscillation characteristic finite element method |
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