軸流式壓縮機葉片結構分析探討

Structure Analysis of Axial Compressor Blade

陳精一(Ching I Chen) ； 涂聰賢(Tzung Hsyen Twu)

《中國航空太空學會學刊》 28卷1期 (1996/03) Pp. 81-89

https://doi.org/10.6124/TAASRC.199603_28(1).09

摘要

本文是針對軸流式壓縮機之轉子葉片結構的振動探討，以瞭解葉片的動態特性，以避免操作時共振現象的發生；在數學模式中將葉片考慮爲預扭之雙錐度尤拉樑(Euler's beam)，並使用連續性能量法及兩個橫向(transverse)振動爲樑之假設，扭轉效應及剪力變形在此數學模式中暫不考慮，以建立其懸臂樑振動頻率的數學模式，盼能藉此數學模型的建立能迅速有效的模擬葉片的動態特性；並將實際葉形模擬爲具錐度、預扭之懸臂樑，另選擇一組雙錐度預扭樑參數，以比較實際與理論分析結果之差異。結果顯示在數學模式中因扭轉效應和剪力變形效應並無考慮，所以有些頻率無法有效獲得。

關鍵字

振動 ； 有限元素 ； 葉片

並列摘要

The purpose of this article is to study the dynamic characteristics of the axial compressor rotating blade in avoiding the resonance phenomena during the operating condition. In mathcmatical model, the continuous approach based on the energy method is performed in the derivation of the dynamic governing equations of motion. The rotating blade is modeled as a pre-twisted, double tapered beam in thickness and width t certain stagger angle mounted on the disk. The Euler beam assumption is considered and neglected the torsional and shear effects. In numerical simulation, the comparison results are made between a set of beam parameter and a rcal blade geometry. According to the results, one knows that only the low vibration mode can be predicted due to the simplicity of the mathematical model. Further consideration of torsional vibration vibration, and shear effect is necessary in order to realize dynamic behavior of the higher vibration modes.

並列關鍵字

Vibration ； Finite Element ； Bladc