摘要
研究以振动试验测得的飞机结构固有频率为目标值的有限元动力模型的优化问题。应用了一种单元组合法，该方法基于动力平衡方程以及正交性。通过修改质量矩阵的元素来优化，使计算出的固有频率与试验测得的频率值基本一致，并成功地应用于无人机水平尾翼模型上。
This study is concerned with the optimization of the finite element dynamic model of large structures. The objective value is the natural frequency measured by vibration tests.Based on the dynamic balance equation and orthogonality, the method of combinatorial elements is used to make the agreement of the computational natural frequency with the tested natural frequency by modifying the elements of the mass matrix. The method has been successfully applied in the tailplane of an unmanned aircraft.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1996年第S1期104-108,共5页
Acta Aeronautica et Astronautica Sinica
关键词
优化大型结构有限元法
optimization large structure finite element method
