Uncertainty quantification of rotor blade dynamic strain reconstruction based on blade tip timing

被引：0
|
作者：
Chen L. [1 ,2 ]
Qiao B. [1 ,2 ]
Ao C. [1 ,2 ]
Fu S. [3 ]
Liu M. [1 ,2 ,3 ]
Chen X. [1 ,2 ]
机构：
[1] School of Mechanical and Engineering, Xi’an Jiaotong University, Xi’an
[2] The State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an
[3] Sichuan Gas Turbine Establishment, Aero Engine Corporation of China, Chengdu
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2022年 / 37卷 / 07期
关键词：
blade tip timing; dynamic strain reconstruction; Kriging proxy model; maximum entropy method; uncertainty quantification;
D O I：
10.13224/j.cnki.jasp.20210275
中图分类号：
学科分类号：
摘要：
Based on the theory of blade non‑contact dynamic strain reconstruction，research on the uncertainty quantification method of dynamic strain reconstruction was carried out. Accord‑ ing to the variance composition theorem， a model of the blade reconstructed dynamic strain un‑ certainty for quantitative analysis was established. A simulated rotor blade was used as the research object，and the rotation experiment was carried out. The circumferential Fourier Fitting was used to obtain the amplitude of measuring point under different blade tip timing sensor layouts， and the maximum entropy method was adopted to fit the probability density function of the amplitude distribution，which could be used to determine the uncertainty parameters of the blade‑tip‑timing vibration measurement. The finite element model of the blade was modified by combining the Kriging proxy model and the resonant frequency of the test. The displacement‑strain conversion factors of the key measuring points were obtained，and the uncertainty parameters of the conver‑ sion factor considering the uncertainty of the resonance speed and measuring point position were obtained. The mean value， standard uncertainty and inclusion interval of the reconstructed dynamic strain were obtained and compared with the measured data of the strain gauge. Results showed that except for the measuring point A of No. 5 blade，the measured dynamic strains were all within the 95% confidence interval of the reconstructed dynamic strain， and the dynamic strain reconstruction error of the strain gauges of all blades didn’t exceed 15%. © 2022 BUAA Press. All rights reserved.
引用
收藏
页码：1456 / 1468
页数：12
相关论文
共 21 条
  • [1] WANG Shouju, Overview of the development of informatiza‑ tion of domestic and foreign aero‑engine enterprises[J], Inter‑ nal Combustion Engine and Parts, 41, 13, (2020)
  • [2] XU Hailong, Research on key technology of crack detection in rotating blades by non‑contact online blade tip‑timing method, (2018)
  • [3] KNAPPETT D, GARCIA J., Blade tip timing and strain gauge correlation on compressor blades[J], Proceedings of the Institution of Mechanical Engineers：Part G Journal of Aerospace Engineering, 222, 4, (2008)
  • [4] Xiaojie ZHANG, Yanrong WANG, JIANG Xianghua, Et al., Blade vibration stress determination method based on blade tip timing simulator and finite element method[J], Journal of Engineering for Gas Turbines and Power, 142, 3, (2020)
  • [5] DUAN Fajie, LI Gang, YE Dechao, Et al., Method for invers‑ ing dynamic stress of blade based on tip‑timing[J], Nano‑tech‑ nology and Precision Engineering, 14, 3, (2016)
  • [6] WANG Weiming, REN Sanqun, CHEN Lifang, Et al., Tests for synchronous vibration parametric identification method of a turbine’s blades[J], Journal of Vibration and Shock, 36, 17, (2017)
  • [7] LIU Meiru, TENG Guangrong, XIAO Xiao, Et al., Vibration measurement of turbine rotor blades of aero‑engine based on blade tip ‑ timing[J], Journal of Aerospace Power, 35, 9, (2020)
  • [8] LIU Meiru, ZHU Jing, LIANG Enbo, Et al., Vibration mea‑ surement on compressor rotor blades of aero ‑ engine based on tip ‑ timing[J], Journal of Aerospace Power, 34, 9, (2019)
  • [9] XU Hailong, YANG Yongmin, HU Haifeng, Et al., Com‑ pressed sensing‑based blind reconstruction of multi‑frequen‑ cy blade vibration from under‑sampled BTT signals[J], Jour‑ nal of Mechanical Engineering, 55, 13, (2019)
  • [10] AO Chunyan, QIAO Baijie, LIU Meiru, Dynamic strain re‑ construction method of rotating blades based on no ‑ contact measurement, Journal of Aerospace Power, 35, 3, (2020)
123