模拟叶片三棱柱式缘板阻尼器减振试验研究

杜晨鸿; 王延荣; 李迪; 李鸿光; 彭泰; 石霖

doi:10.13224/j.cnki.jasp.20230739

模拟叶片三棱柱式缘板阻尼器减振试验研究

doi: 10.13224/j.cnki.jasp.20230739

杜晨鸿¹,
王延荣¹,
李迪^{2, 3,*, ,},
李鸿光²,
彭泰¹,
石霖¹

1.
北京航空航天大学能源与动力工程学院，北京 100191
2.
上海交通大学机械与动力工程学院，上海 200240
3.
中国航发商用航空发动机有限责任公司，上海 200241

基金项目: 国家科技重大专项（2017-Ⅳ-0002-0039）

详细信息

作者简介:
杜晨鸿（1999-），男，博士生，主要从事航空发动机结构强度及振动研究

通讯作者:
李迪（1983-），男，博士生，主要从事航空发动机结构强度研究。E-mail：lidi831616@163.com

中图分类号: V231.92
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- 被引次数: 0
出版历程
- 收稿日期: 2023-11-24
- 网络出版日期: 2025-04-16

Experimental investigation on vibration suppression of a model blade by triangular prism underplatform damper

DU Chenhong¹,
WANG Yanrong¹,
LI Di^{2, 3,*
, ,},
LI Hongguang²,
PENG Tai¹,
SHI Lin¹

1.
School of Energy and Power Engineering，Beihang University，Beijing 100191，China
2.
School of Mechanical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China
3.
Commercial Aircraft Engine Company Limited，Aero Engine Corporation of China，Shanghai 200241，China

摘要

摘要:
设计了激励叶片振动响应试验系统，通过改变砝码数量来调节三棱柱式阻尼器与叶片缘板间的正压力，以验证干摩擦阻尼器提供的阻尼比随结构振动应力的变化规律。在模拟叶片试验件共振频率附近扫频获得幅频响应曲线，利用半功率带宽法计算临界阻尼比，结合该激振力下激起的振动应力，可得叶片缘板阻尼特性曲线。试验结果表明：三棱柱式缘板阻尼器的两个接触面能提供不同的阻尼效果，与计算得到的阻尼特性曲线吻合较好。试验研究了阻尼器惯性载荷、实际接触面积和叶片伸根长度对阻尼比的影响，得到了有规律的结果：阻尼器的惯性载荷对峰值阻尼比几乎不产生影响，实际接触面积过小时阻尼器减振效果不稳定，叶片伸根长度越长，阻尼器提供阻尼效果越好。
- 叶片 /
- 缘板阻尼器 /
- 振动试验 /
- 干摩擦 /
- 阻尼比
Abstract:
An experimental system was developed to evaluate the dynamic response of the blade. This system modulated the standard pressure between the triangular prism damper and the platform by regulating the quantity of weights, so as to validate the variation in damping ratios produced by dry friction dampers under structural vibration stress. By sweeping frequencies around the resonant frequency of the simulated blade test specimen, the amplitude-frequency response curve was obtained, from which the critical damping ratio was computed using the half-power bandwidth method. By measuring the vibration stress, the damping ratio characteristic curve was also acquired. The experimental results demonstrated that the two contact surfaces of the triangular prism damper had different damping effects. Moreover, the computed damping ratio characteristic curve agreed well with the experimental data. It was found that: the inertial load of the damper had negligible influence on the maximum damping ratio; when the actual contact area was small, the damping performance of the damper was unstable; and the length of the shank of the blade was positively correlated with the damping effect of the damper.
- blade /
- underplatform damper /
- vibration test /
- dry friction /
- damping ratio

HTML

图 1 宏滑动模型摩擦力变化迟滞曲线

Figure 1. Friction hysteresis curve of macro sliding model

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图 2 模拟叶片及缘板阻尼器试验件

Figure 2. Simulated blade and underplatform damper test pieces

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图 3 缘板阻尼器安装图

Figure 3. Underplatform damper installation diagram

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图 4 振动试验装置

Figure 4. Vibration test device

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图 5 激励装置和应变片粘贴位置

Figure 5. Excitation device and strain gauge paste position

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图 6 不同激振力下叶片试验件位移幅频响应曲线

Figure 6. Displacement amplitude-frequency response curve of blade test piece under different exciting forces

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图 7 叶片试验件阻尼比与振动应力的关系

Figure 7. Relationship between damping ratio and vibration stress of blade test piece

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图 8 叶片试验件阻尼特性（斜接触面安装缘板阻尼器，惯性载荷为120 N）

Figure 8. Damping characteristics of blade test piece （damper installed on incline contact surface, inertial load 120 N）

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图 9 叶片试验件阻尼特性（斜接触面安装缘板阻尼器，不同惯性载荷）

Figure 9. Damping characteristics of blade test piece （damper installed on incline contact surface, different inertial loads）

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图 10 叶片模拟件阻尼特性（直接触面安装缘板阻尼器，不同惯性载荷）

Figure 10. Damping characteristics of blade test piece （damper installed on vertical contact surface, different inertial loads）

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图 11 叶片试验件阻尼特性（不同阻尼器试验件）

Figure 11. Damping characteristics of blade test pieces （different damper test pieces）

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图 12 叶片试验件阻尼特性（不同伸根长度试验件）

Figure 12. Damping characteristics of blade test pieces （different length of root extending section of test pieces）

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表 1 叶片试验件1阶弯曲振动频率

Table 1. First order bending vibration frequency of blade test piece Hz

参数	数值
计算频率$ {f}' $	328.91
未安装阻尼器试验频率$ {f}_{0} $	322.57
30 N惯性载荷试验频率$ {f}_{30} $	327.15
120 N惯性载荷试验频率$ {f}_{120} $	327.19

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表 2 缘板阻尼器试验件斜接触区尺寸

Table 2. Dimension of inclined contact area of underplatform damper test pieces mm

试验件序号	斜接触区长度	斜接触区宽度
1	33	16
2	22	16
3	11	16

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表 3 试验件的叶片伸根段长度

Table 3. Length of blade root extending section of test pieces mm

试验件序号	伸根沿叶高方向长度
1	28
2	38
3	48

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