管式减涡器阻尼结构减振特性及设计方法

牛南轲; 漆文凯; 许正华

doi:10.13224/j.cnki.jasp.20220469

管式减涡器阻尼结构减振特性及设计方法

doi: 10.13224/j.cnki.jasp.20220469

南京航空航天大学能源与动力学院，南京 210016

详细信息

作者简介:
牛南轲（1998-），男，硕士生，主要从事航空发动机结构强度与振动研究

通讯作者:
漆文凯（1970-），男，副教授，博士，主要从事航空发动机结构动力学研究。E-mail：qwkai@nuaa.edu.cn

中图分类号: V23.1
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- 被引次数: 0
出版历程
- 收稿日期: 2022-06-30
- 网络出版日期: 2023-10-13

Damping characteristics and design method of tubular vortex reducer damper

College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

摘要

摘要:
为了抑制管式减涡器工作中的振动，开展对应的阻尼结构设计与减振特性研究工作。针对管式减涡器，总结了阻尼结构的设计参数，在此基础上，归纳了管式减涡器阻尼结构的设计流程。使用该方法对某型发动机减涡器进行阻尼结构设计和减振特性计算，并进行试验验证。结果表明，该方法设计的阻尼器具有良好的阻尼减振效果，可以将关键点应力水平降低80%以上。并且试验得到的减振效果与达到最优减振效果的正压力区间都与计算结果接近，验证了该方法在预测减振特性时的准确性。
- 减涡器 /
- 阻尼结构 /
- 干摩擦阻尼 /
- 设计流程 /
- 减振试验
Abstract:
In order to suppress the vibration of tubular vortex in operation, corresponding damping structure design and damping characteristics research were carried out. For the tubular vortex reducer, the design parameters of the damping structure were summarized. On this basis, the design process of the damping structure of the tubular vortex reducer was summarized. This method was used to design the damping structure and calculate the damping characteristics of an engine vortex reducer, and test verification was carried out. The results showed that the damper designed by this method has good damping effect and can reduce the stress level at key points by more than 80%. The test results and the normal pressure range to achieve the optimal damping effect were close to the calculation results, verifying the accuracy of the method in predicting the damping characteristics.
- vortex reducer /
- damping structure /
- dry friction damping /
- design flow /
- vibration reduction test

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图 1 减涡器及阻尼管模型

Figure 1. Model of vortex reducer and damping tube

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图 2 阻尼管设计参数

Figure 2. Design parameters of damping tube

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图 3 阻尼管设计流程图

Figure 3. Design process of damping tube

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图 4 力与位移迟滞曲线

Figure 4. Hysteresis curve of force and displacement

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图 5 计算流程图

Figure 5. Calculation flow chart

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图 6 3种长度的阻尼管

Figure 6. Damping tube of 3 lengths

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图 7 减涡器有限元模型

Figure 7. Finite element model of vortex reducer

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图 8 不同开口数下接触压力沿周向分布图

Figure 8. Circumferential distribution of contact pressure with different opening numbers

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图 9 Matrix27 单元在减涡器的周向分布

Figure 9. Circumferential distribution of MATRIX27 unit in vortex reducer

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图 10 激励点及响应点位置

Figure 10. Location of excitation point and response point

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图 11 带40%管长阻尼管的减涡器幅频特性曲线（F=5 N）

Figure 11. Amplitude frequency characteristic curves of vortex reducer with 40% tube length damping tube （F=5 N）

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图 12 带40%管长阻尼管的减涡器幅频特性曲线（F=10 N）

Figure 12. Amplitude frequency characteristic curves of vortex reducer with 40% tube length damping tube （F=10 N）

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图 13 带40%管长阻尼管的减涡器幅频特性曲线（F=20 N）

Figure 13. Amplitude frequency characteristic curves of vortex reducer with 40% tube length damping tube （F=20 N）

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图 14 带40%管长阻尼管减涡器不同激振力下相对共振峰值随无量纲正压力变化曲线

Figure 14. Variation curves of relative resonance peak value with dimensionless normal pressure under different excitation forces of tube vortex reducer with 40% tube length damping tube

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图 15 工作载荷下40%管长阻尼管应力分布

Figure 15. Stress distribution of 40% tube length damping tube under working load

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图 16 试验件

Figure 16. Test piece

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图 17 试验台

Figure 17. Test bench

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图 18 带40%管长阻尼管的减涡器幅频特性曲线（a=0.65g）

Figure 18. Amplitude frequency characteristic curves of vortex reducer with 40% tube length damping tube （a=0.65g）

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图 19 带40%管长阻尼管的减涡器幅频特性曲线（a=1.05g）

Figure 19. Amplitude frequency characteristic curves of vortex reducer with 40% tube length damping tube （a=1.05g）

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图 20 带40%管长阻尼管的减涡器幅频特性曲线（a=1.5g）

Figure 20. Amplitude frequency characteristic curves of vortex reducer with 40% tube length damping tube （a=1.5g）

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图 21 带 40%管长阻尼管减涡器不同激励加速度下相对共振峰值随相对正压力变化曲线

Figure 21. Variation curves of relative resonance peak value with relative normal pressure under different excitation accelerations of vortex reducer with 40% tube length damping tube

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表 1 不同管长阻尼管的设计开口宽度

Table 1. Design opening width of damping tube with different tube lengths

阻尼管管长/% 周向位移/mm 设计开口宽度/mm

40 0.25 0.5
60 0.41 0.8
80 0.56 1.0

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表 2 阻尼管减振特性分析结果汇总

Table 2. Analysis results of damping characteristics of damping tube

阻尼管管长/% 最优减振效果/% 最优无量纲正压力

40 83.17 25
60 77.89 50
80 73.15 20

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表 3 不同管长阻尼管过盈量设计值

Table 3. Design values of interference of damping tubes with different tube lengths

管长/% 设计过盈量/mm 接触压力/N 最优正压力/N

40 0.011 132.57 125
60 0.038 255.22 250
80 0.035 103.19 100

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表 4 最优正压力结果对比

Table 4. Comparison of optimal normal pressure results

阻尼管管长/% 计算最优
无量纲正压力试验最优
正压力区间

40 25 10～30
60 50 20～100
80 20 50～150

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