弹性—多孔挤压油膜阻尼支承在发动机上的应用研究

根据某核心机转子支承系统动力特性的理论分析结果,为其设计了弹性支承和多孔质挤压油膜阻尼器（ＰＳＦＤ）,以调整其临界转速并控制振动。将弹性支承和ＰＳＦＤ安装在该核心机上进行试车的结果表明,理论计算与试验结果吻合得很好,临界转速调整到了预期值,阻尼器的减振效果显著。

APPLICATION OF FLEXIBLE-POROUS SQUEEZE FILM DAMPED SUPPORT TO A CORE ENGINE

A porous Squeeze Film Damper (PSFD) had been developed by BUAA on the basis of the normal Squeeze Film Damper (SFD).The investigation on its application indicates that the nonlinear vibration characteristics of rotor system with SFD,such as bistable jump,nonsynchronous response and "lock up" at rotor pin-pin critical speeds under quite high unbalance level are greatly improved or avoided with the PSFD system.In conformity with the calculation and analysis of the dynamic characteristics of the rotor system in a core engine,a new flexible-porous squeeze film damped support has been designed and used in the rotor system of this core engine for adjusting its critical speeds and controlling its vibration.It is shown that the data of the engine cell tests have a good agreement with the calculation results.