考虑结构对称性的测量振型正交化方法

A New Procedure for Orthogonalization of Measured Modes Considering Structural Symmetry

提出了一种改进的飞机结构测量振型正交化方法。该法首次考虑了飞机结构对称性及测量指示函数高低的影响。算例表明，本文方法更符合实际，且能大大提高计算效率。

A modified analytical approach is proposed to orthogonalize the measured modes of airplane structures. Firstly, a generalized flexibility matrix is derived as Gravitz proposed. But this matrix is furthersettled to satisfy the requirements of structural symmetry and the subsequent matrix is only used to reviseone selected mode having the highest testing accuracy. By using this modified mode as the initial vector,the least square method is adopted to compute the rest successively. Applications to several fighters andbombers show that the proposed procedure is more reasonable and economical than others in computation.