摘要
使用有限元传递矩阵法分析了某大长径比弹箭的固有振动特性,成功求得了其固有振动频率和振型函数,计算结果得到试验验证.该方法兼备有限元法建模方便、应用范围广和传递矩阵法应用灵活、矩阵阶次低、计算速度快的优点,易于分析复杂变截面结构弹箭的振动特性,并且可直接利用商业有限元软件得到该方法仿真所必需的质量矩阵和刚度矩阵.
The finite element transfer matrix method was applied to analyze the natural vibration characteristics of some slender rocket/projectile, which was validated by experimental data. The finite element transfer matrix method has not only the merits of finite element method, such as flexible model and wide application, but also the advantages of low matrix order and fast computation of transfer matrix method. So it can be used to easily analyze the vibration characteristics of rocket/projectile with complex variant sections. Stiffness matrices and mass matrices that are essential to simulate can be obtained directly by commercial finite element software.
出处
《动力学与控制学报》
2005年第4期66-70,共5页
Journal of Dynamics and Control
关键词
大长径比弹箭
固有振动特性
有限元传递矩阵法
Slender rocket/projectile, natural vibration characteristic, finite element transfer matrix method
