摘要
针对挤压油膜阻尼器转子系统的动力学特点,实验研究了大不平衡量条件下转子的非线性振动特性;同时研究了转子变速过程角加速度、滑油温度以及阻尼器静偏心对转子非线性振动的影响。结果表明:大不平衡量条件下转子系统可能出现非线性振动跳跃;增大转子变速过程角加速度,降低油温,可抑制非线性振动跳跃;提高阻尼器内外环同心度,减小阻尼器静偏心,可提高阻尼器减振性能,同时抑制非线性振动跳跃;阻尼器设计时必须考虑重力影响,为转子设计预置偏心。
This paper is devoted to the nonlinear characteristics of a rotor bearing system with squeeze film damper（ SFD）. Non-linear jumps of the rotor system and the related factors such as static eccentricity are investigated.The experimental results show that high unbalance levels excite non-linear jump phenomena. However,increasing the rotation acceleration or reducing the oil temperature has positive effect on the inhibition of the jump phenomena.Improvement of alignment upgrades the vibration attenuation of the SFD. And the non-linear jump could also be eliminated by decreasing the static eccentricity of the SFD. The gravity should be concerned in the SFD design process to decrease the static eccentricity.
出处
《机械科学与技术》
CSCD
北大核心
2016年第1期23-28,共6页
Mechanical Science and Technology for Aerospace Engineering
