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Nonlinear vibrations of blade with varying rotating speed

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Abstract

This paper investigates the nonlinear dynamic responses of the rotating blade with varying rotating speed under high-temperature supersonic gas flow. The varying rotating speed and centrifugal force are considered during the establishment of the analytical model of the rotating blade. The aerodynamic load is determined using first-order piston theory. The rotating blade is treated as a pretwist, presetting, thin-walled rotating cantilever beam. Using the isotropic constitutive law and Hamilton’s principle, the nonlinear partial differential governing equation of motion is derived for the pretwist, presetting, thin-walled rotating beam. Based on the obtained governing equation of motion, Galerkin’s approach is applied to obtain a two-degree-of-freedom nonlinear system. From the resulting ordinary equation, the method of multiple scales is exploited to derive the four-dimensional averaged equation for the case of 1:1 internal resonance and primary resonance. Numerical simulations are performed to study the nonlinear dynamic response of the rotating blade. In summary, numerical studies suggest that periodic motions and chaotic motions exist in the nonlinear vibrations of the rotating blade with varying speed.

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Authors and Affiliations

  1. College of Mechanical Engineering, Beijing University of Technology, Beijing, 100124, P.R. China

    M. H. Yao, Y. P. Chen & W. Zhang

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  1. M. H. Yao
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  2. Y. P. Chen
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  3. W. Zhang
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Correspondence to W. Zhang.

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Yao, M.H., Chen, Y.P. & Zhang, W. Nonlinear vibrations of blade with varying rotating speed. Nonlinear Dyn 68, 487–504 (2012). https://doi.org/10.1007/s11071-011-0231-z

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