Squeeze Film Damper Phenomenon
In the design of MEMS devices (sensors and actuators) and the improvement of their dynamic performance, utilizing the air squeeze film damping effect is important. There are also cases where it has been effectively applied to noise and vibration control in general machinery.
When a vibrating flat plate on a fixed surface with thin clearance, the flow and compression of viscous air generate a resistive force acting on the plate. Following is example of a fluid–structure coupled phenomenon so called squeeze film damper effect.
Coupled Analysis Methods
ESTECH predicts the squeeze film damper phenomenon using fluid (CFD)–structure (FEM) coupled analysis with general-purpose CAE software.
There are two methods for considering the squeeze film damper effect in dynamic simulations: strong couple and weak couple. Both have their advantages and disadvantages, so it is important to select the proper method depending on the problem.
