Authors : Jean-Jacques Sinou , Cristiano Viana Serra Villa , Fabrice Thouverez and Michel Massenzio
Abstract: This study presents several experimental tests for the analysis of the dynamics of a flexible rotor. At first several modal analysis tests are made for different rotating speeds, with a shaker providing an asynchronous excitation. The Frequency Response Functions obtained from these tests are used to build the Campbell diagram of the rotor. In another series of tests, the synchronous response of the rotor is measured and the results are analyzed in parallel with the Campbell diagram. Secondly, the objective is to evaluate experimentally the effects of adding no-rotating damping for a rotor system to decrease the vibration amplitudes of the rotor within the range of operating speeds. The influence of the contribution of damping on such a system is evaluated by checking the coast up tests, mainly in the critical speeds zones. To accomplish such study, several alternatives of damping were tested to decrease the vibratory levels of the rotor at the synchronous critical speed.
Jean-Jacques Sinou , Cristiano Viana Serra Villa , Fabrice Thouverez and Michel Massenzio , 2006. Experimental Analysis of the Dynamical Response of a Flexible Rotor Including the Effects of External Damping. Journal of Engineering and Applied Sciences, 1: 483-490.