Structural Engineering and Mechanics

  • 제61권1호
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  • Pages.105-116
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  • 2017
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Optimal extended homotopy analysis method for Multi-Degree-of-Freedom nonlinear dynamical systems and its application

  • Qian, Y.H. (College of Mathematics, Physics and Information Engineering, Zhejiang Normal University) ;
  • Zhang, Y.F. (College of Mathematics, Physics and Information Engineering, Zhejiang Normal University)
  • 투고 : 2016.05.04
  • 심사 : 2016.09.27
  • 발행 : 2017.01.10
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, the optimal extended homotopy analysis method (OEHAM) is introduced to deal with the damped Duffing resonator driven by a van der Pol oscillator, which can be described as a complex Multi-Degree-of-Freedom (MDOF) nonlinear coupling system. Ecumenically, the exact solutions of the MDOF nonlinear coupling systems are difficult to be obtained, thus the development of analytical approximation becomes an effective and meaningful approach to analyze these systems. Compared with traditional perturbation methods, HAM is more valid and available, and has been widely used for nonlinear problems in recent years. Hence, the method will be chosen to study the system in this article. In order to acquire more suitable solutions, we put forward HAM to the OEHAM. For the sake of verifying the accuracy of the above method, a series of comparisons are introduced between the results received by the OEHAM and the numerical integration method. The results in this article demonstrate that the OEHAM is an effective and robust technique for MDOF nonlinear coupling systems. Besides, the presented methods can also be broadly used for various strongly nonlinear MDOF dynamical systems.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundations of China (NNSFC), China Scholarship Council

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