摘要
本文阐述了有限元计算模型试验修正的一种方法,推导了求特征值和特征向量对结构参数导数的二阶矩阵摄动近似解,并在直升机桨叶的有限元计算模型的试验修正中得到成功应用。
An attractive approach for the improved finite element analysis model by modal test has been described.The calculation of derivatives of eigenvalues and eigenvectors with respect to structural parameters and the solution to second-order matrix perturbation approximation have been derived. These are successfully applied to the improvement of the finite element analysis model in a helicopter rotor blade.
关键词
摄动法
有限元法
试验修正
模型
perturbation method, finite element, modal parameters, experimental modification, orthogonality
