Effects of static eccentricity of squeeze film damper on vibration reduction effect of rotor system
XU Weiwen1,2, ZHANG Dahai1,2, WANG Ping3, LIU Jingze1,2, FEI Qingguo1,2, JIANG Dong1,4
1. Jiangsu Provincial Engineering Research Center of Aerospace Machinery, Southeast University, Nanjing 211189, China;
2. School of Mechanical Engineering, Southeast University, Nanjing 211189, China;
3. AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China;
4.College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
Abstract：To investigate the influences of static eccentricity of the squeeze film damper (SFD) on the vibration reduction characteristics, the expression of the oil film force of the SFD with static eccentricity is derived under the Reynolds boundary condition, and a rotor system considering the non-concentricity of the SFD is established. The effects of static eccentricity on the vibration attenuating characteristics of the SFD is analyzed by numerical method. The results show that the critical speed of the rotor system is increased and its corresponding amplitude is suppressed with the augment of static eccentricity; A larger static eccentricity ratio is prone to amplitude jump in the run-up process. The bearing capacity of the SFD declines and the vibration damping efficiency during operation at the maximum load capacity is reduced as static eccentricity ratio grows.
徐伟文1,2，张大海1,2，王平3，刘璟泽1,2，费庆国1,2，姜东1,4. 转子挤压油膜阻尼器静偏心对减振效果的影响[J]. 振动与冲击, 2021, 40(21): 55-61.
XU Weiwen1,2, ZHANG Dahai1,2, WANG Ping3, LIU Jingze1,2, FEI Qingguo1,2, JIANG Dong1,4. Effects of static eccentricity of squeeze film damper on vibration reduction effect of rotor system. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(21): 55-61.
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