标题：Vibration analysis of rotating rings with complex support stiffnesses
作者：Yang, Fuchun ;Zhang, Yue ;Li, Hailong
作者机构：[Yang, Fuchun ;Zhang, Yue ;Li, Hailong ] School of Mechanical Engineering, Shandong University, Jinan; 250061, China
会议名称：3rd International Conference on Design, Mechanical and Material Engineering, D2ME 2018
会议日期：27 September 2018 through 29 September 2018
来源：MATEC Web of Conferences
摘要：Vibration characteristics of rotating rings with complex support stiffnesses are studied. The complex stiffnesses of the rotating ring include discrete stiffnesses and partially distributed stiffnesses. The governing equations are established by Hamilton's principle. The governing equations are cast in matrix differential operators and discretized using Galerkin's method. The eigenvalue problem is dealt with state space matrix and the natural frequencies and vibration modes are obtained. The properties of natural frequencies and vibration modes of rotating rings are studied. The results illustrate that frequency separation and frequency veering happen with the increase of rotation speed. The vibration modes are not dominated by only one nodal diameter while dominated by several nodal diameters because the discrete and partially distributed stiffnesses disrupt the axisymmetry of rotating rings. The influences of several parameters to vibration properties of rotating rings are also investigated. © 2018 The Authors, published by EDP Sciences.