TY - JOUR
T1 - Nonlinear dynamic analysis of rotor-bearing-SFD system considering support dynamic stiffness
AU - Jiang, Wenpeng
AU - Yuan, Xin
AU - Liu, Kaikai
AU - Cao, Hongrui
AU - Qin, Qinghua
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer Nature B.V. 2025.
PY - 2025/12
Y1 - 2025/12
N2 - The dynamic characteristics of the stator system have a significant impact on the behavior of aero-engine rotors, and the coupling of rotor, support, and stator vibrations is a key issue in rotor dynamics. While dynamic stiffness is commonly used in engineering practice to represent the stator’s influence on the rotor’s dynamics, the coupling mechanisms between the rotor system, nonlinear support components (such as bearing and squeeze film damper), and the dynamic stiffness of the stator remain unclear. This paper presents a nonlinear rotor-bearing-SFD coupling model that integrates the dynamic stiffness of the stator, focusing on the impact of dynamic stiffness on rotor modal characteristics and nonlinear behavior, including critical speeds, amplitude-frequency response, bifurcation behavior evolution, and support system load-bearing characteristics. Experimental validation is conducted using an aero-engine rotor-support-casing tester. Simulation and experimental results show that considering stator dynamic stiffness significantly alters the rotor’s critical speeds and amplitude-frequency response while reducing the system’s nonlinearity compared to static stiffness. This study highlights the importance of considering both stator dynamic stiffness and the nonlinear characteristics of supports in aero-engine rotor modeling.
AB - The dynamic characteristics of the stator system have a significant impact on the behavior of aero-engine rotors, and the coupling of rotor, support, and stator vibrations is a key issue in rotor dynamics. While dynamic stiffness is commonly used in engineering practice to represent the stator’s influence on the rotor’s dynamics, the coupling mechanisms between the rotor system, nonlinear support components (such as bearing and squeeze film damper), and the dynamic stiffness of the stator remain unclear. This paper presents a nonlinear rotor-bearing-SFD coupling model that integrates the dynamic stiffness of the stator, focusing on the impact of dynamic stiffness on rotor modal characteristics and nonlinear behavior, including critical speeds, amplitude-frequency response, bifurcation behavior evolution, and support system load-bearing characteristics. Experimental validation is conducted using an aero-engine rotor-support-casing tester. Simulation and experimental results show that considering stator dynamic stiffness significantly alters the rotor’s critical speeds and amplitude-frequency response while reducing the system’s nonlinearity compared to static stiffness. This study highlights the importance of considering both stator dynamic stiffness and the nonlinear characteristics of supports in aero-engine rotor modeling.
KW - Nonlinear dynamics
KW - Rotor-bearing-SFD system
KW - Support dynamic stiffness
KW - Vibration analysis
UR - https://www.scopus.com/pages/publications/105018780510
U2 - 10.1007/s11071-025-11838-1
DO - 10.1007/s11071-025-11838-1
M3 - 文章
AN - SCOPUS:105018780510
SN - 0924-090X
VL - 113
SP - 34733
EP - 34760
JO - Nonlinear Dynamics
JF - Nonlinear Dynamics
IS - 25
ER -