Abstract：PolyMAX is a broadband modal identification algorithm developed in recent years. It has many advantages in handling high noisy data, closely coupled modes and high damping structure. A fast implementation of PolyMAX is achieved by avoiding matrix inversion and multiplication in calculating reduced normal equations. A simulation case of seven DOF system and an application case of gas turbine disk are employed to validate the fast implementation. The results show that fast implementation can speed up modal identification significantly with little accuracy loss.
2011, Vol. 30 
