ターボ機械の非接触翼振動計測法の開発 : 改良少数点法

概要

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Recently the non-contact measurement methods using optical or magnetic probes have been applied for the measurement of vibration of rotating blades. The non-contact measurement methods of the rotating blades are classified into two categories by the form of data processing : multi-probe method and few-probe method. Though the multi-probe method can measure the amplitudes, frequencies, and circumferential modes, it is difficult to apply the multi-probe method to the measurement of the actual machine because many probes on the casing are required. On the other hand, the few-probe method is easy to apply to the measurement of the actual machine, but the few-probe method cannot detect the frequencies and circumferential modes. Consequently the few-probe method is not suitable to the detailed measurement. In this paper, the improved few-probe method, which has been developed to overcome the disadvantages of the conventional methods, is presented. In order to verify the validity of the proposed method, the numerical simulation and the measurement of the actual machines are carried out. From these results, it is confirmed that the improved few-probe method can detect the amplitudes, frequencies, and circumferential modes like the multi-probe method.
社団法人日本機械学会の論文
2001-06-25