Hou, "Steady-state response characteristics of a dual-rotor system
induced by rub-impact," Nonlinear Dynamics, vol.
In recent years, coaxial dual-rotor system has been applied to many aeroengines with two corotating or counterrotating rotors, such as RB211, GE120, and F119.
have studied the dynamic characteristics of a counterrotating dual-rotor system with the transfer matrix method.
Dynamic characteristics of both the co- and counterrotating dual-rotor system were studied in this section.
Yang, "Nonlinear dynamic performance analysis of counter-rotating dual-rotor system," Journal of Vibration Engineering, vol.
The purpose of this paper is to study the modeling method and nonlinear dynamic characteristics of the complex dual-rotor systems. In the second part of the paper, the modeling method and the numerical algorithm are presented.
The motivation of the paper is to detect the dynamic response under pedestal looseness status of the dual-rotor system, which is widely used in aircraft engines and other real rotating machines.
Figures 1(a) and 1(b) show the dual-rotor system test rig and structure diagram, respectively.
One-dimensional finite element model of dual-rotor system (excluding pedestal) is built based on Timoshenko beam element, as presented in Figure 2, which is composed of the inner rotor (node 1 to node 13) and the outer rotor (node 14 to node 20).
As for the dual-rotor system test rig in the research, the fastening bolts on one side of the pedestal are loosened to simulate the pedestal looseness.
Based on dynamic equations of dual-rotor system, systematic transient dynamic simulation is accomplished.
Tu, "Rotor-bearing analysis for turbomachinery single- and dual-rotor systems
," Journal of Propulsion and Power, vol.