A New Method for Identifying Rotating Blades Synchronous Vibration Based on Tip-Timing

OUYANG Tao;GUO Wen-li;DUAN Fa-jie;LI Meng-lin

Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (8) : 249-252,.

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PDF(2228 KB)
Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (8) : 249-252,.
论文

A New Method for Identifying Rotating Blades Synchronous Vibration Based on Tip-Timing

  • OUYANG Tao1; GUO Wen-li2; DUAN Fa-jie1; LI Meng-lin1

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Abstract

In order to command the vibration characteristic of the rotating blades at different speed, the blades vibration testing experiment has been taken by BTT (blade-tip-timing) system. Speed-vector-end-tracking method based on varying speed measurement is analyzed in theory. And a new method for identifying blades synchronous vibration is designed. The method is applied on a certain model of aerial equipment to do measuring experiment. The vibration parameters such as engine-order, dynamic frequency, amplitude and damp coefficient have been identified exactly. The identifying repeatability error of the frequency and amplitude are up to 0.0072Hz and 5.7um. Blade Campbell diagram has been drawn correctly. The experiment identified results are in accord with the designed results of the blade in theory.

Key words

BTT / rotating blade / synchronous vibration / engine-order traverse

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OUYANG Tao;GUO Wen-li;DUAN Fa-jie;LI Meng-lin. A New Method for Identifying Rotating Blades Synchronous Vibration Based on Tip-Timing[J]. Journal of Vibration and Shock, 2011, 30(8): 249-252,
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