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SCI Article

Nonlinear dynamic modeling and response analysis of a rotor-blade system with whirling motion

	성명	정진태 ()
	소속	공학대학 기계공학과
	캠퍼스
	우수선정주	2019년 12월 1째주

Author

Kim, Jaewon (Dept Mech Engn); Hong, Jun-Gi (Dept Mech Engn); 정진태 (Dept Mech Engn) corresponding author;

Corresponding Author Info

Chung, J (reprint author), Hanyang Univ, Dept Mech Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea.

E-mail

jchung@hanyang.ac.kr

Document Type

Article

Source

NONLINEAR DYNAMICS Volume:98 Issue:2 Pages:953-970 Published:2019

Times Cited

External Information

http://dx.doi.org/10.1007/s11071-019-05238-5

Abstract

In this paper, we propose a new nonlinear dynamic model of a rotor-blade system with whirling motion, in which a rigid rotor and blades are modeled as a Jeffcott rotor and Euler-Bernoulli beams, respectively. The stiffening effects of the rotating blades are considered using a hybrid set of deformations, which consist of the stretch and chordwise deformations. After the nonlinear partial differential equations of motion are derived using Hamilton's principle, they are discretized using the Galerkin method. From the discretized equations, the nonlinear dynamic responses are computed using the generalized-alpha time integration method. Based on the dynamic responses and the frequency spectra, the proposed model is verified both for the case where the blade is considered to be a rigid body and for the case where there is no whirling motion of the rotor. In this study, the nonlinear dynamic responses of the rotor-blade system are analyzed in terms of the natural frequencies for whirling motion and the natural frequencies of the deformation of the rotating beam. In addition, the effects of the supporting stiffness, rotating speed and blade stiffness on the dynamic responses of the radial displacement and stretch/chordwise deformations are also analyzed.

Web of Science Categories

Engineering, Mechanical; Mechanics

Funding

Language

English

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