Effects of Bearings and Housing on Mode Localization of a Nearly Cyclic Symmetric System

Y. F. Chen, I. Y. Shen
2014 Volume 8: 26th Conference on Mechanical Vibration and Noise   unpublished
This technical brief is to study how flexible bearings and housing affect mode localization of a nearly cyclic symmetric system with mistuning. This study is conducted via finite-element analyses and deductive reasoning. A reference system studied is a bladed disk with two groups of 24 localized modes. When bearings and housing are introduced into the reference system, their presence changes natural frequencies, mode shapes, and the number of the localized modes. Moreover, the mistuning causes
more » ... e mistuning causes bearing forces to surge for all the localized modes. A deductive reasoning based on the existing literature supports the observation from the finiteelement analyses.
doi:10.1115/detc2014-34536 fatcat:glymtigdhvcefoupse3bghmrfu