Analysis of dynamic characteristics of a sealed ends squeeze film damper considering the fluid inertia force

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.