Modal Testing of a Full-Scale Rotating Woven Composite Fan Using Piezoelectric Excitation

摘要

An experimental facility for testing full-scale bladed disks in vacuum conditions and under centrifugal load is described in this paper. The special feature of the PHARE#1 test rig is its multichannel excitation system which allows to excite woven composite fan blades with any spatial and phase distribution as well as synchronous or non-synchronous vibration forcing with respect to rotation speed. The configuration of the excitation system allows each blade to be excited independently and therefore nodal diameter excitations can be performed with traveling (forward, backward or mixed) or standing waves. First rotations of the PHARE#1 test rig produced results at different rotation speeds, for several modes, nodal diameters and excitation levels. Typical results analysis and findings are presented in this paper.