A rule of synchro response design for squeeze film damper under impact loading

Based on derivation of fluid inertia velocity distribution, the paper proposes an analytical model for pressure distribution of squeeze film damper (SFD) in long bearing assumption under impact loading. Compared with numerical simulation and test results, the model is reasonable. The model analysis results reflect the reversion behavior about SFD radial force. Therefore, a design rule of synchro-response for SFD is recommended, and then an expression of SFD parameters is given which is in accordance with the rule. These results are useful for design and for real-time active control of SFD-rotor-system, and are helpful for further theoretical investigation on oil film dynamic behavior also.