翼群の共振応答特性に関する研究 : 第2報, 翼群の増振効果・制振効果の原因の理論的解明

概要

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The previous paper revealed that the vibration waveform of the grouped blades is the cause of the resonant stress increasing and decreasing effect, and provided the theoretical investigation with a set of fundamental data on the tangential flexural Vibration of the finite group of blades. This paper, which aims to clarify the cause of the above effects theoretically, first investigates the resonant response characteristics of the infinite group of blades, whose vibration waveform is inevitably a sine waveform, and finds that the infinite group of blades has neither resonant stress increasing nor decreasing effects. This suggests that these effects result from the deviation of vibration waveform from the sine shape. Therefore, this paper also investigates the data provided by the previous study in detail, and confirms the above suggestion, and presents a straightforward method of distinguishing the normal mode of the resonant stress increasing effect from that of the decreasing effect, together with a straightforward method of estimating the degree of those effects. Finally, it is discussed which is superior between the infinite and finite groups of blades, from the viewpoint of the resonant stress increasing and decreasing effects.
一般社団法人日本機械学会の論文
1992-10-25