Dynamic Behavior Analysis of Rotational Flexible Blades Based on Time-Domain Finite Element Method

WANG Xin-dong; DENG Zi-chen; WANG Yan; FENG Guo-chun

doi:10.3879/j.issn.1000-0887.2014.04.002

Volume 35 Issue 4

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WANG Xin-dong, DENG Zi-chen, WANG Yan, FENG Guo-chun. Dynamic Behavior Analysis of Rotational Flexible Blades Based on Time-Domain Finite Element Method[J]. Applied Mathematics and Mechanics, 2014, 35(4): 353-363. doi: 10.3879/j.issn.1000-0887.2014.04.002

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Dynamic Behavior Analysis of Rotational Flexible Blades Based on Time-Domain Finite Element Method

doi: 10.3879/j.issn.1000-0887.2014.04.002

¹Department of Engineering Mechanics, Northwestern Polytechnical University, Xi’an 710072, P.R.China;²State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, Liaoning 116023, P.R.China

Funds: The National Natural Science Foundation of China(11172239; 11372252)

Received Date: 2013-12-11
Rev Recd Date: 2014-02-20
Publish Date: 2014-04-15

Abstract

Abstract

The time-domain finite element method was introduced to investigate the dynamic responses of rotational flexible blades. Firstly, the rotational flexible blades were modeled as a classic rigid hub-flexible beam system. Based on the first-order approximate coupling (FOAC) model, the Lagrangian function for the rotational flexible blades system was derived. Then, with the assumed mode method (AMM), the time-domain finite element scheme was constructed. Finally, the dynamic behavior of the rotational flexible blades was analyzed with the time-domain finite element method through numerical simulation. Constructed directly without derivation of the kinetic equations, the proposed discrete scheme is naturally endowed with symplectic conservation, high computational accuracy and good stability. Numerical results show that the time-domain finite element method can effectively solve the rigid-flexible coupling problem, in which the low-frequency large motion and the high-frequency elastic vibration of the blades are interactive.
- first-order approximate coupling (FOAC),
- assumed mode method (AMM),
- time-domain finite element,
- symplectic conservation

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References(18)

References

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