Analysis of Vibration of the Turbine Blades Using Non-Intrusive Stress Measurement System
Analysis of Vibration of the Turbine Blades Using Non-Intrusive Stress Measurement System
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DOI：
10.1115/power2006-88239
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
K. Joung;Suk-Chul Kang;Ki-Seok Paeng;N. Park;Hongil Choi;Y. You;A. V. Flotow
中科院分区：
文献类型：
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作者：
K. Joung;Suk-Chul Kang;Ki-Seok Paeng;N. Park;Hongil Choi;Y. You;A. V. Flotow
开发了一种非侵入式应力测量系统（NSMS），用于测量涡轮机叶片的耦合振动。这些系统可以报告在叶片上看到的实际应力;检测作为叶片中高周疲劳（HCF）来源的同步共振;测量单个叶片失调，甚至帮助分离叶盘中复杂的耦合共振。在高温下成功进行了试验，并测量了所有叶片的叶尖正时和叶尖间隙。非侵入式应力测量系统（NSMS）被成功地用于测量叶盘振动，并在许多运行是一致的。SDOF曲线拟合和周向傅立叶拟合用于识别所有叶片的共振振幅、共振RPM和阻尼。两种数据处理方法的结果吻合良好。由于每个叶片的叶尖挠度都可以通过NSMS系统获得，因此，相对于基于几个叶片的应变计数据的疲劳裕度，可以减少疲劳裕度。
A Non-intrusive Stress Measurement (NSMS) was developed to measure coupled vibration on turbine blades. These systems can report the actual stresses seen on the blades; detect synchronous resonances that are the source of High Cycle Fatigue (HCF) in blades; measure individual blade mistuning and even help separate complicated, coupled resonances in bladed disks. Tests were successfully performed at high temperature and measured both tip timing and tip clearance of all blades. Non-Intrusive Stress Measurement Systems (NSMS) was used successfully in measuring bladed disk vibration, and was consistent over many runs. The SDOF curve fit and Circumferential Fourier fit were used to identify resonance amplitudes, resonance RPM and damping for all blades. The results of the two data-reduction methods matched well. Because tip deflection for every blade can be obtained with NSMS system, it might be possible to reduce the fatigue margin relative to the fatigue margin based upon strain gage data from a few blades.Copyright © 2006 by ASME