摘要
在使用梁-质量块模型计算飞行器扭转模态时,模型的扭转转动惯量模型对结构动特性的计算结果有着决定性的影响。研究了不同扭转转动惯量计算方法对系统扭转动力学特性的影响。首先,给出了三种转动惯量计算模型,其中包括一种精确模型和两种简化模型。其次,基于数据,建立了飞行器有限元模型。最后,基于给出的三种模型计算了飞行器的扭转模态。研究发现,对模型的局部扭转转动惯量进行修正,计算的扭转模态精度较高。
The moment of inertia has crucial influence on the torsion mode result,while the model of a aircraft is established based on the beam-mass model. The influence of different moment of inertia model on the structure dynamic characteristic of the tactics missile is studied. Firstly,three kinds of moment of inertia model are put forward,including one precise model and two kinds of simplified model. Secondly,the model of the aircraft is established according to the initial data. At last,the modes of the aircraft are calculated,and compared to the precise result. It is found that the results of simplified models which has local improvement can derive more precise result.
出处
《战术导弹技术》
北大核心
2015年第6期53-56,共4页
Tactical Missile Technology
关键词
模态
扭转
有限元
梁
mode
torsion mode
finite element method
beam
