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First-order approximate rigid-flexible coupled dynamics analysis of a simple aero-engine blade model with dynamic stiffening effect

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Abstract

Aero-engine blades often fracture failed due to resonance. In order to analyze the vibration characteristics of high-speed rotating blades of aero-engine more accurately, not only the out-of-plane deformation and in-plane deformation, but also the in-plane deformation caused by out-of-plane deformation are taken into account in the process of research on the rigid-flexible coupling dynamics of blade. The study using the hypothetical modal method to describe the deformation of the blade and using the Lagrangian dynamics equation to establish the first-order approximation coupled dynamics equation of the flexible blade with three-dimensional large displacement motion. The simulation results show that the theoretical results of the first approximation coupling model are consistent with the actual results, but the zero-order approximation coupling model is flawed when the blade speed is high. Based on the first-order approximation coupling model, the vibration frequency, frequency-steering and mode-switching problems of the blade are analyzed, and the feasibility of the proposed method is verified.

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Acknowledgments

The support of this work by National Natural Science Foundation of China (No. 51975386), National Key R&D Program of China (No. 2019YFB1705000, 2020YFB2007800) and Liaoning Xingliao Program (No. XLYC1907200) are gratefully acknowledged.

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Authors and Affiliations

  1. School of Mechanical Engineering, Shenyang University of Technology, Shenyang, 110870, China

    Zhe Wei, Li Li & Fang Zhao

Authors
  1. Zhe Wei
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  2. Li Li
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  3. Fang Zhao
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Corresponding author

Correspondence to Li Li.

Additional information

Wei Zhe is a Professor at the School of Mechanical Engineering, Shenyang University of Technology, Shenyang, China. He received his Ph.D. from Zhejiang University. His research interests include intelligent design and intelligent manufacturing.

Li Li is an Associate Professor at the School of Mechanical Engineering, Shenyang University of Technology, Shenyang, China. She received her Ph.D. from Northeastern University. Her research interests include intelligent design and industry design.

Zhao Fang is a Professor at the School of Mechanical Engineering, Shenyang University of Technology, Shenyang, China. She received her Master’s degree from Huazhong University of Science and Technology. Her research interests include intelligent design and industry design.

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Wei, Z., Li, L. & Zhao, F. First-order approximate rigid-flexible coupled dynamics analysis of a simple aero-engine blade model with dynamic stiffening effect. J Mech Sci Technol 35, 2997–3003 (2021). https://doi.org/10.1007/s12206-021-0623-z

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  • DOI: https://doi.org/10.1007/s12206-021-0623-z

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