基于叶端定时的航空发动机压气机叶片裂纹识别

doi:10.7527/S1000-6893.2025.31823

Abstract

Abstract:

The Blade Tip Timing （BTT） method facilitates non-contact vibration measurement for real-time online monitoring of rotating blade cracks. One of its primary challenges is the reconstruction of undersampled blade tip timing signals. This paper introduces the Cluster contraction Stage wise Orthogonal Matching Pursuit （CS-OMP） algorithm to address this issue， proposing a CS-OMP-based method for reconstructing undersampled vibration signals of compressor blades in aeroengines. The proposed method aims to improve the reconstruction accuracy and real-time performance of blade vibration signals. Additionally， it identifies blade cracks by detecting changes in the first-order modal frequency of rotating compressor blades. The simulation analysis verifies that this method can accurately identify the single-modal and multi-modal vibration parameters of blades. Furthermore， blade crack identification experiments were conducted using a scaled-down compressor test component of an aero-engine. The results demonstrate that this method outperforms the traditional Orthogonal Matching Pursuit （OMP） algorithm in blade vibration reconstruction and achieves accurate identification of blade cracks.

Key words: blade tip timing, resonance identification, sparse reconstruction, crack identification, aeroengine

CLC Number:

V232

Yun ZHANG, Chenguang LIU, Yukun ZHANG, Peng LI. Crack identification of aeroengine compressor blades based on blade tip timing[J]. Acta Aeronautica et Astronautica Sinica, 2025, 46(23): 231823.

Figures/Tables 31

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References 25

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参数	数值
叶盘材料	7050铝合金
叶片个数	34
叶盘半径/mm	113.5
轮盘半径/mm	63.5
叶片长度/mm	50
裂纹位置	15号叶片前缘距叶根11 mm
裂纹类型	贯穿式
裂纹长度/mm	4.5
传感器数量	5
传感器安装位置/（°）	［0，73，108，128，156］

叶片序号	共振开始/圈	共振结束/圈	共振总圈数	叶片序号	共振开始/圈	共振结束/圈	共振总圈数
1	1 770	2 029	130	18	1 364	1 462	120
2	1 862	1 981	120	19	1 816	1 965	148
3	1 853	1 993	140	20	1 867	1 882	20
4	1 923	2 041	118	21	3 183	3 192	20
5	2 421	2 499	30	22	2 644	2 709	20
6	2 673	2 697	24	23	2 094	2 221	120
7	2 301	2 444	142	24	2 247	2 413	82
8	2 121	2 272	76	25	2 025	2 098	36
9	2 206	2 271	32	26	2 207	2 301	94
10	1 865	1 944	40	27	2 055	2 261	102
11	1 793	1 941	74	28	2 045	2 193	148
12	1 766	1 965	200	29	1 985	2 152	166
13	1 859	2 073	106	30	1 912	2 082	84
14	1 727	1 892	164	31	1 942	2 074	66
15	1 675	1 883	104	32	2 004	2 151	146
16	1 764	1 958	96	33	1 819	1 860	40
17	1 763	1 936	87	34	1 855	2 035	180

叶片序号	共振开始/圈	共振结束/圈	共振总圈数	叶片序号	共振开始/圈	共振结束/圈	共振总圈数
1	1 845	2 046	130	18	1 369	1 491	120
2	1 836	1 982	120	19	1 848	2 002	76
3	1 871	2 026	140	20	1 832	1 860	14
4	1 976	2 019	118	21	3 050	3 053	20
5	2 490	2 521	30	22	2 724	2 744	20
6	2 697	2 698	24	23	2 087	2 277	94
7	2 442	2 517	142	24	2 305	2 401	96
8	2 263	2 293	76	25	2 042	2 121	40
9	2 261	2 316	32	26	2 197	2 308	110
10	1 910	1 978	40	27	2 135	2 284	150
11	1 854	2 008	74	28	2 124	2 210	86
12	1 978	2 019	200	29	2 044	2 206	80
13	1 903	2 022	106	30	1 969	2 106	68
14	1 735	2 017	164	31	1 965	2 106	70
15	1 379	1 450	104	32	2 034	2 116	82
16	1 734	1 898	96	33	1 763	1 899	120
17	1 797	1 919	87	34	1 903	2 059	156

叶片序号	一阶动频/Hz	叶片序号	一阶动频/Hz
1	753.7	18	742.6
2	754.1	19	753.2
3	753.2	20	753.2
4	755.6	21	783.2
5	766.5	22	770.6
6	771.6	23	759.6
7	764.5	24	763.4
8	760.4	25	757.5
9	761.6	26	761.8
10	753.7	27	759.9
11	752.7	28	758.9
12	752.4	29	756.9
13	755.2	30	755.8
14	751.3	31	756
15	752.4	32	757.1
16	752.9	33	752.6
17	752.4	34	754.4

叶片序号	一阶动频/Hz	叶片序号	一阶动频/Hz
1	753.1	18	741.9
2	752.8	19	753.2
3	753.7	20	751
4	754.8	21	779.5
5	766.4	22	771
6	770.4	23	758.9
7	765.8	24	762.8
8	761.6	25	757
9	761.3	26	763.1
10	753.6	27	759.7
11	753.3	28	758.6
12	755.7	29	757.9
13	754	30	755.8
14	752.2	31	755.7
15	742.2	32	756.5
16	750.5	33	751.2
17	751.6	34	754.2

Crack identification of aeroengine compressor blades based on blade tip timing

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