The present work deals with identification, Using a dynamic excitation test at a single point, of modal parameters of a structure with arbitrary viscous damping and very strongly coupled vibration modes. In this paper a method is introduced of solving a problem of identifying more modal numbers and wider frequency range by using a small computer. Theory and various ways for reducing conditional number of coefficient matrix of linear equations have been illustrated. Due to improving method of weighting commutative efficiency is raised obviously. And corresponding mass, stiffness and damping matrices of lumped equivalent modal of measured structure is given.
展开▼
