中功率涡桨发动机减振系统设计与试验研究

董万元; 陈永辉; 王建强; 陈春兰; 范勇军; 吴谋彬

doi:10.13433/j.cnki.1003-8728.20220128

中功率涡桨发动机减振系统设计与试验研究

doi: 10.13433/j.cnki.1003-8728.20220128

1.
中国飞机强度研究所航空声学与振动航空科技重点实验室, 西安 710065
2.
中国航发湖南动力机械研究所, 湖南株洲 412002

基金项目: 国家民机科研专项基金项目

详细信息

作者简介:
董万元(1986-), 工程师, 硕士研究生, 研究方向为振动控制, 994992628@qq.com

中图分类号: TH113.1;U441.3
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- PDF下载量: 28
- 被引次数: 0
出版历程
- 收稿日期: 2021-09-11
- 刊出日期: 2023-10-25

Design and Experimental Study on Vibration Isolation System of Medium Power Turboprop Engine

1.
Key Laboratory of Aerial Science and Technology for Aeroacoustics and Vibration, Aircraft Strength Institute of China, Xi′an 710065, China
2.
Aecc Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, Hu′nan, China

摘要

摘要: 针对涡桨飞机发动机振动严酷的问题, 利用氢化丁腈橡胶设计了一种中功率涡桨发动机减振系统, 基于Workbench ANSYS软件研究了含橡胶实体单元的减振系统动力学建模分析方法; 再以加速度传递率为隔振性能评价准则, 设计了中功率涡桨发动机减振性能试验系统, 通过试验研究减振系统的减振性能。结果表明: 在小变形假设下利用橡胶材料硬度估算其弹性模量, 由线弹性模型模拟橡胶材料开展减振系统动力学仿真分析, 仿真分析结果与扫频试验结果误差小于10%;通过随机振动试验测得减振系统对发动机1阶窄带激励的隔振效率大于70%, 对2阶窄带激励的隔振效率大于85%, 设计的减振系统对发动机窄带激励具有优良的隔振效果。
- 涡桨发动机 /
- 减振系统 /
- 氢化丁腈橡胶 /
- 隔振效率
Abstract: Aiming at the severe vibration problems of turboprop aircraft engine, a medium power turboprop engine damping system was designed by using hydrogenated nitrile rubber (HNBR). By using the workbench ANSYS software, the dynamic modeling analysis method of the damping system with rubber solid element was studied. Then, taking the acceleration transmissibility as the evaluation criterion of vibration isolation performance, a medium power turboprop engine vibration reduction performance test system is designed, and the vibration reduction performance of the vibration reduction system is studied through the test method. The results show that under the assumption of small deformation, the elastic modulus of rubber material is estimated by the hardness of rubber material, and the dynamic simulation analysis of the damping system is carried out by simulating the rubber material with linear elastic model, and the difference between the simulation analysis results and the frequency sweep test results is below 10%; through the random vibration test, the vibration isolation efficiency of the damping system for the first-order narrow-band excitation of the engine is above 70%, and the vibration isolation efficiency for the second-order narrow-band excitation is above 85%. The designed damping system has the excellent vibration isolation effect for the narrow-band excitation of the engine.
- turboprop engine /
- damping system /
- hydrogenated nitrile rubber /
- vibration isolation efficiency

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图 1 涡桨发动机减振系统

Figure 1. Vibration isolator of turboprop engine

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图 2 减振装置外形与结构

Figure 2. Outline and structure of vibration isolator

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图 3 减振系统有限元模型

Figure 3. Finite element model of isolator

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图 4 模态计算云图

Figure 4. Cloud chart of model calculation

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图 5 发动机振动试验系统

Figure 5. Engine vibration test system

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图 6 振动试验频谱

Figure 6. Spectrum of vibration test

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图 7 振动试验

Figure 7. Vibration test

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图 8 仿真与试验曲线对比

Figure 8. Comparison of simulation and test curves

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图 9 随机振动试验结果

Figure 9. Random vibration test results

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表 1 模态计算结果

Table 1. Results on model calculation

阶数	模态频率/Hz	振型
1	18.3	绕y轴俯仰振动
2	21.1	绕z轴偏摆振动
3	30.4	沿z轴振动
4	39.4	沿y轴振动
5	55.2	绕x轴转动
6	89.1	沿x轴振动

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表 2 仿真与试验误差分析

Table 2. Error analysis of simulation and experiment

名称	x向		y向				z向
名称	谐振点频率	放大倍数	谐振点1频率	放大倍数	谐振点2频率	放大倍数	谐振点1频率	放大倍数	谐振点2频率	放大倍数
模态分析结果	89.1 Hz		21.1 Hz		39.4 Hz		18.3 Hz		30.4 Hz
模态分析结果	沿x轴振动		绕y轴俯仰振动		沿y轴振动		绕z轴偏摆振动		沿z轴振动
扫频仿真结果	90.0 Hz	8.9	19.0 Hz	2.3	32.5 Hz	3.7	20.0 Hz	5.8	30.0	1.1
扫频试验结果	87.1 Hz	9.6	20.6 Hz	2.4	35.2 Hz	4.1	20.9 Hz	6.4	28.3	0.8
误差	3.3%	-7.3%	-7.8%	-4.2%	-7.7%	-9.8%	-4.3%	-9.4%	6.0%	37.5%

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表 3 隔振效率试验结果

Table 3. Test results on vibration isolation efficiency

名称	x向		y向		z向
名称	1阶窄带激励	2阶窄带激励	1阶窄带激励	2阶窄带激励	1阶窄带激励	2阶窄带激励
激励均方根值/g	2.025 18	2.886 93	1.812 65	3.394 91	2.230 21	2.506 97
测点1均方根/g	0.601 49	0.342 18	0.419 04	0.052 17	0.132 03	0.227 83
测点2均方根/g	0.388 92	0.104 681	0.041 666	0.164 84	0.473 54	0.129 73
测点1减振效/%	70.2	88.1	76.9	98.5	94.1	90.9
测点2减振效/%	80.8	96.4	97.7	95.1	78.7	94.8

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