摘要
工程上对导弹的结构动特性分析是姿态控制和动载荷计算的基础,然而动特性的精确预示往往依赖于有效的导弹动力学模型的修正。结合单纯形优化算法和有限元法给出了一种基于多目标优化算法的导弹动力学模型的修正方法,模型修正后的前三阶频率和振型计算结果与试验结果均吻合较好。该方法优化过程简单,修正结果理想,是一种有效的有限元模型修正方法。
The structural dynamic analysis of missiles is the foundation of attitude control and dynamic load. However, the accurate prediction of the dynamic character relies on the effective modification of missile dynamic model. A modification technique of missile dynamic model based on multi-objective optimization and finite element analysis is given in this paper, and the first three order frequencies and modal shapes show good agreement with experimental result. This finite element modal updating method is efficient for its brief progress and ideal result.
出处
《强度与环境》
2012年第6期30-35,共6页
Structure & Environment Engineering
关键词
优化算法
有限元法
模型修正
动特性分析
optimization algorithm
finite element method
model modification
dynamic analysis
