考虑静偏心的挤压油膜阻尼器模型及减振特性分析

李宇; 王四季; 李川; 王金海; 唐振寰; 米栋

doi:10.13224/j.cnki.jasp.20240282

考虑静偏心的挤压油膜阻尼器模型及减振特性分析

doi: 10.13224/j.cnki.jasp.20240282

李宇^1,,
王四季^1,*, ,,
李川²,
王金海¹,
唐振寰²,
米栋²

1.
西北工业大学动力与能源学院，西安 710072
2.
中国航发湖南动力机械研究所，湖南株洲 412002

详细信息

作者简介:
李宇（1993-），男，博士生，主要从事航空发动机转子振动控制研究。E-mail：15620832418@163.com

通讯作者:
王四季（1981-），男，副教授，博士，主要从事航空发动机转子振动控制研究。E-mail：sjwang@nwpu.edu.cn

中图分类号: V231.96
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- 被引次数: 0
出版历程
- 收稿日期: 2024-05-06
- 网络出版日期: 2025-09-19

Model and study on vibration damping characteristics of squeeze film damper considering static eccentricity

LI Yu^1
,,
WANG Siji^{1,*
, ,},
LI Chuan²,
WANG Jinhai¹,
TANG Zhenhuan²,
MI Dong²

1.
School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China
2.
Hunan Aviation Powerplant Research Institute，Aero Engine Corporation of China，Zhuzhou Hunan 412002，China

摘要

摘要:
为了探明静偏心对挤压油膜阻尼器减振特性的影响，基于Reynolds边界条件建立了考虑静偏心的挤压油膜阻尼器油膜力力学模型，采用数值计算和实验相结合的方法完成了模型验证和减振特性的分析。结果表明：静偏心越大，阻尼器的非线性特性越强，轴颈运动轨迹畸变越严重，阻尼器“油膜刚度周向异性”特征越明显，更易诱发系统产生2倍频；随着静偏心的增大，阻尼器的减振特性呈现先增强后降低的变化趋势。建立的考虑静偏心的挤压油膜阻尼器油膜力力学模型更能反映阻尼器的工作特征，弥补了基于同心型挤压油膜阻尼器油膜力力学模型迭代求解静偏心问题的模型误差缺陷。
- 减振特性 /
- Reynolds边界条件 /
- 挤压油膜阻尼器 /
- 静偏心 /
- 刚度异性
Abstract:
In order to investigate the effect of static eccentricity on the vibration reduction characteristics of squeeze film dampers, a static eccentricity squeeze film damper oil film force model was established based on Reynolds boundary conditions. The model validation and vibration attenuation characteristics analysis were completed by using a combination of numerical calculation and experimental methods. The results showed that as the static eccentricity increased, the nonlinear characteristics of the damper became stronger, the distortion of the journal motion trajectory became more severe, and the circumferential anisotropy of the oil film stiffness of the damper became more obvious, making it more likely to induce the system to produce a second harmonic. As the static eccentricity increased, the damping characteristics of the damper showed a trend of first increasing and then decreasing. The oil film force mechanics model established can better reflect the working characteristics of the damper and compensate for the model error defect in iteratively solving static eccentricity problems based on the oil film force mechanics model of concentric squeeze oil film dampers.
- vibration damping characteristics /
- Reynolds boundary conditions /
- squeeze film damper /
- static eccentricity /
- stiffness anisotropy

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图 1 挤压油膜阻尼器结构图

Figure 1. Structural diagram of squeeze film damper

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图 2 挤压油膜阻尼器理想状态

Figure 2. Ideal state of squeeze film damper

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图 3 挤压油膜阻尼器静偏心状态

Figure 3. State of squeeze film damper with static eccentricity

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图 4 静偏心挤压油膜阻尼器计算模型^[19]

Figure 4. Calculation model of squeeze film damper with static eccentricity^[19]

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图 5 油膜刚度和阻尼周向分布曲线

Figure 5. Circumferential distribution curve of oil-film stiffness and dampering

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图 6 油膜力响应曲线

Figure 6. Response curve of oil-film force

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图 7 不同静偏心比下的油膜刚度和阻尼周向分布曲线

Figure 7. Circumferential distribution curve of oil-film stiffness and dampering with different static eccentricity ratios

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图 8 动力涡轮转子结构示意图

Figure 8. Schematic diagram of power turbine rotor

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图 9 动力涡轮转子单元节点划分示意图

Figure 9. Schematic diagram of unit node division for power turbine rotor

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图 10 双向激励实验器

Figure 10. Bidirectional excitation tester

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图 11 挤压油膜阻尼器局部示意图

Figure 11. Partial schematic diagram of squeeze film damper

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图 12 轴颈时域波形图

Figure 12. Time domain waveform of journal

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图 13 轴颈相对外环的运动轨迹图

Figure 13. Motion trajectory diagram of the journal relative to the outer ring

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图 14 轴颈相对外环的运动轨迹图（实验）

Figure 14. Motion trajectory diagram of the journal relative to the outer ring （experiment）

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图 15 轴颈时域波形图（实验）

Figure 15. Time domain waveform of journal （experiment）

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图 16 轴颈最大响应幅值-静偏心比变化趋势图

Figure 16. Trend chart of maximum response amplitude of the journal-static eccentricity ratio

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图 17 轴颈振动幅频响应曲线

Figure 17. Amplitude-frequency response curves of journal

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图 18 不同静偏心比条件下油膜周向体积变化示意图

Figure 18. Schematic diagram of circumferential volume change of oil film under different static eccentricity ratios

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图 19 轴颈振动响应曲线

Figure 19. Vibration response curve of journal

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图 20 静偏心比-临界转速/临界响应峰值变化曲线

Figure 20. Curve of critical speed/critical peak response with static eccentricity ratio

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表 1 挤压油膜阻尼器参数

Table 1. Parameters of squeeze film damper

参数	数值
油膜半径R₂/mm	52
油膜半径间隙C₂/mm	0.197
油膜长度L₂/mm	23
滑油动力黏度μ₂/（Pa·s）	0.025
油膜半径R₉/mm	68
油膜半径间隙C₉/mm	0.385
油膜长度L₉/mm	17
滑油动力黏度μ₉/（Pa·s）	0.025

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