Analysis of dynamic characteristics of a sealed ends squeeze film damper considering the fluid inertia force
Chao Guo 1,2
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School of Aero-engine, Shenyang Aerospace University, Shenyang, China
Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aircraft Propulsion System, School of Economics and Management, Tongji University, ShangHai, China
Submission date: 2022-10-13
Final revision date: 2023-03-10
Acceptance date: 2023-03-10
Online publication date: 2023-05-29
Publication date: 2023-07-31
Corresponding author
Chao Guo   

School of Economics and Management, Tongji University, China
Journal of Theoretical and Applied Mechanics 2023;61(3):441-452
In order to effectively calculate dynamic characteristics of a sealed ends squeeze film damper (SFD) under the influence of the inertial force, a computational fluid dynamics model of the sealed ends SFD is established. The fluid inertia coefficient of SFD is investigated by using an energy approximation method. Both the theoretical calculation and numerical simulation are conducted to analyze the effects of eccentricity ratio and whirling frequency on stiffness and damping. In this research, the oil film inertia force of the sealed ends SFD is solved by using long bearing approximation (LBA) theory, which provides guidance for the design and application of the sealed ends SFD.
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