Coupled vibration analysis of blades with angular pretwist of cubic distribution

作者: Mustafa Sabuncu

DOI: 10.2514/3.9102

关键词:

摘要: This paper presents a finite element model for the vibration analysis of pretwisted uniform cross-sectional blading. The variation pretwist along blade length can be in linear or trigonometric increments. dynamic stiffness free is derived from strain and kinetic energies using Lagrange's equation. cubic polynomial approximation displacements, two principal directions, assumed. method gives excellent results with use only small number elements. Good agreement found experimental theoretical other investigators straight linearly blades. comparison between nonlinearly beams shows large deviations when angle increases.

参考文章(4)
H. A. Slyper, Coupled Bending Vibrations of Pretwisted Cantilever Beams Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23). ,vol. 4, pp. 365- 379 ,(1962) , 10.1243/JMES_JOUR_1962_004_050_02
William Carnegie, Vibrations of Rotating Cantilever Blading: Theoretical Approaches to the Frequency Problem Based on Energy Methods Archive: Journal of Mechanical Engineering Science 1959-1982 (vols 1-23). ,vol. 1, pp. 235- 240 ,(1959) , 10.1243/JMES_JOUR_1959_001_028_02
W. Carnegie, B. Dawson, Vibration Characteristics of Straight Blades of Asymmetrical Aerofoil Cross-Section The Aeronautical Quarterly. ,vol. 20, pp. 178- 190 ,(1969) , 10.1017/S0001925900004984