4Qu z Q, Jung Y, Selvam R P. Model condensation for non-classically damped systems-part I: static condensation[J]. Me- chanical Systems and Signal Processing, 2003, 17(5): 1003-1016.
5Irons B. Structural eigen value problems: elimination of unwanted variables[J]. AIAA Journal, 1965, 3(5): 961-962.
6Robert J. Guyan reduction of stiffness and mass matrlces[J]. AIAA Journal, 1965, 3(2): 680. " ].
7Edward J Kuhar, Clyde V Stahle. Dynamic transformation method for modal synthesis[J]. AIAA Journal, 1974, 12(5): 672- 678.
8O'Callahan J C. A procedure for an improved reduced system (IRs) model[C]//Proceedings of the 7th International Model Analysis Conference. Las Vegas, 1989: 17-21.