突加不平衡下弹性环挤压油膜阻尼器减振性能实验

为了研究在瞬态冲击（突加不平衡）下弹性环挤压油膜阻尼器(elastic ring squeeze film damper,ERSFD)对转子系统突增振动的抑制效果，设计并搭建带ERSFD的转子动力学实验台，开展突加不平衡动力学实验，获取阻尼器供油和不供油下转子系统升速及降速过程中的振动响应规律。结果表明ERSFD供油后有效地抑制了突加不平衡引起的瞬态响应，降低了突加不平衡引起的额外振动74.39%，同时抑制了转子经过临界转速的基频振动（幅值最大降低了62.18%）;ERSFD供油后会在转子系统中引入额外的刚度和阻尼，其综合效果表现为转子的临界转速较ERSFD不供油的状态下，1阶临界转速降低2.39%。

Experiment on vibration reduction performance of elastic ring squeeze film damper under sudden unbalance

In order to study the suppression effect of elastic ring squeeze film damper （ERSFD） on vibration of rotor system under transient impact （sudden unbalance）, the rotor dynamics experiment rig with ERSFD was designed and assembled to carry out the experiment of sudden unbalance and obtain the experimental results of the spectrum response at the speed up and down of the rotor under oil free and oil supply states. Results showed that ERSFD can effectively suppress the fundamental frequency vibration at the critical speed and transient response caused by sudden unbalance, and reduce the vibration amplitude at critical speed and additional vibration by 62.18% and 74.39% respectively; the combined effect indicated that the first critical speed of the rotor was 2.39% lower than that of the ERSFD oil free when additional stiffness and damping were introduced into the rotor system.