整体叶盘解谐振动测试、失谐辨识与模型确认

赵景超; 周标; 陈伟

doi:10.13224/j.cnki.jasp.20220267

整体叶盘解谐振动测试、失谐辨识与模型确认

doi: 10.13224/j.cnki.jasp.20220267

南京航空航天大学能源与动力学院航空发动机热环境与热结构工业和信息化部重点实验室，南京 210016

基金项目: 国家自然科学基金（52175098）；欧盟地平线2020研究与创新项目玛丽∙居里学者项目（891197）

详细信息

作者简介:
赵景超（1997-），男，硕士生，主要从事结构动力学研究。E-mail：jc.zhao@nuaa.edu.cn

通讯作者:
周标（1985-），男，副教授，博士，主要从事结构动力学研究。E-mail：biao.zhou@nuaa.edu.cn

中图分类号: V231.92
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- 文章访问数: 98
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- 被引次数: 0
出版历程
- 收稿日期: 2022-04-28
- 网络出版日期: 2023-09-27

Blade detuning test, mistuning identification and model verification of blisk

Aero-engine Thermal Environment and Structure Key Laboratory of Ministry of Industry and Information Technology，College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

摘要

摘要:
开展了基于叶片解谐振动测试的整体叶盘失谐辨识和模型确认研究。对整体叶盘开展叶片解谐振动测试，提出一种解谐质量布置方案准则，获取整体叶盘所有“单个”叶片振动频率的差异化分布；引入一种失谐辨识方法，消除由于叶片解谐质量所带来的残余叶间振动耦合效应的影响，获取更为准确的叶片失谐分布辨识结果；重点探究不同解谐质量及位置对整体叶盘叶片解谐振动测试和失谐辨识结果的影响，并建立失谐整体叶盘有限元模型；开展基于常规模态测试的失谐整体叶盘模型确认研究，整体叶盘固有频率和振型的仿真/测试结果一致性良好，大多数模态的频差低于0.3%。结果表明该失谐辨识方法能够提高通过叶片解谐振动测试直接获取的叶片失谐分布的准确性，在此基础上建立的失谐整体叶盘有限元模型能够有效反映实际整体叶盘结构的固有振动特性。
- 整体叶盘 /
- 叶片失谐 /
- 解谐振动测试 /
- 失谐辨识 /
- 模型确认
Abstract:
The blade mistuning identification and model validation for an academic blisk test piece based on the blade detuning tests were performed. Blade detuning tests were carried out to obtain the ‘blade-alone’ modal frequencies of each individual blade of the blisk. A guideline was proposed for determining the position of the detuning mass onto the blade. Secondly, a novel mistuning identification method was introduced to account for the residual inter-blade coupling effect due to detuning masses and yield more accurate blade mistuning identification results. The impacts of different detuning mass and positions on the blade detuning test and mistuning identification results were investigated. A mistuned blisk finite element model could be further established; the mistuned blisk model was experimentally verified by the conventional modal test. Excellent agreement was achieved between the numerically/experimentally derived natural frequencies and mode shapes of the blisk. The majority of the frequency deviations fell below 0.3%. Results showed that the novel mistuning identification method improved the accuracy of the blade mistuning patterns directly obtained from the blade detuning test results. The resultant mistuned blisk model can effectively reproduce the natural vibration characteristics of the real blisk test piece.
- blisk /
- blade mistuning /
- blade detuning test /
- mistuning identification /
- model validation

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图 1 整体叶盘试验件

Figure 1. Blisk experiment piece

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图 2 固有频率-节径图

Figure 2. Natural frequency-nodal diameter diagram

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图 3 叶片模态动能分布

Figure 3. Modal kinetic energy distribution of blade

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图 4 叶片解谐振动测试

Figure 4. Blade detuning vibration test

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图 5 1号叶片测试频响函数对比

Figure 5. Comparison of test FRFs of No.1 blade

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图 6 所有叶片解谐振动测试频响函数

Figure 6. Collection of all blades detuning test FRFs

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图 7 $M_{{\rm{d}}}^{}$ = 11.4 g，叶片一弯模态频率失谐辨识结果

Figure 7. $M_{{\rm{d}}}^{}$ = 11.4 g, blade frequency mistuning identification results for 1B （bending） mode

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图 8 $ M_{{\rm{d}}}^{} $ = 11.4 g，叶片一扭模态频率失谐辨识结果

Figure 8. $ M_{{\rm{d}}}^{} $ = 11.4 g, blade frequency mistuning identification results for 1T （torsional） mode

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图 9 不同解谐质量及其位置

Figure 9. Different detuning masses and positions

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图 10 叶片一弯模态频率失谐辨识结果

Figure 10. Frequency mistuning identification results: 1B （bending） mode

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图 11 叶片一扭模态频率失谐辨识结果

Figure 11. Frequency mistuning identification results: 1T （torsional） mode

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图 12 叶片一弯模态频率失谐辨识结果的验证

Figure 12. Verification of frequency mistuning identification results for 1B （bending） mode

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图 13 叶片一扭模态频率失谐辨识结果的验证

Figure 13. Verification of frequency mistuning identification results for 1T （torsional） mode

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图 14 整体叶盘的模态测试

Figure 14. Modal test of blisk

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图 15 仿真和测试模态频率比对

Figure 15. Comparison of simulation and test modal frequencies

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图 16 整体叶盘仿真和测试模态振型比对

Figure 16. Comparison of simulation and test modal vibration shapes of blisk

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表 1 不同测试方案的解谐质量及尺寸

Table 1. Detuning mass and size in different test cases

测试方案编号解谐质量数值/g 底面直径/mm

1 9.2 20
2 11.4 10
3 19 10

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