Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)
- Volume 22 Issue 1
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- Pages.190-197
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- 1998
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- 1226-4873(pISSN)
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- 2288-5226(eISSN)
DOI QR Code
Vibration analysis of a pretwisted rotating blade with a concentrated mass
집중질량과 초기 비틀림각을 갖는 회전블레이드의 진동해석
- Kwak, Joo-Young (Graduate School of Hanyang University) ;
- Yoo, Hong-Hee (Dept. of Mechanical Engineering, Hanyang University)
- Published : 1998.01.01
Abstract
Equations of motions of a pretwisted rotating blade with a concentrated mass in an arbitrary position are derived. The flapwise and chordwise equations are coupled to each other due to the pretwist angle of the blade. As the angular speed, hub radius ratio, pretwist angle and concentrated mass vary, the vibration characteristics of the blade change. It is found that eigenvalue lociveering phenomena occur between two closing loci due to the pretwist angle. The effect of the pretwist angle on the critical angular speed and location of the concentrated mass on the natural frequencies are also investigated.
Keywords
- Vibration Analysis;
- Pretwisted;
- Rotating Blade;
- Concentrated Mass;
- Natural Frequency Loci Veering;
- Mode Shape Variations
- 진동해석;
- 초기 비틀림각을 갖는;
- 회전블레이드;
- 집중질량;
- 고유진동수 궤적 휨;
- 모드형상변화;