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A variational numerical method based on finite elements for the nonlinear solution characteristics of the periodically forced Chen system

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Abstract.

Nonlinear dynamical systems and their solutions are very sensitive to initial conditions and therefore need to be approximated carefully. In this article, we present and analyze nonlinear solution characteristics of the periodically forced Chen system with the application of a variational method based on the concept of finite time-elements. Our approach is based on the discretization of physical time space into finite elements where each time-element is mapped to a natural time space. The solution of the system is then determined in natural time space using a set of suitable basis functions. The numerical algorithm is presented and implemented to compute and analyze nonlinear behavior at different time-step sizes. The obtained results show an excellent agreement with the classical RK-4 and RK-5 methods. The accuracy and convergence of the method is shown by comparing numerically computed results with the exact solution for a test problem. The presented method has shown a great potential in dealing with the solutions of nonlinear dynamical systems and thus can be utilized in delineating different features and characteristics of their solutions.

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Authors and Affiliations

  1. Department of Applied Mathematics and Statistics, Institute of Space Technology, 44000, Islamabad, Pakistan

    Sabeel M. Khan, D. A. Sunny & M. Aqeel

Authors
  1. Sabeel M. Khan
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  2. D. A. Sunny
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  3. M. Aqeel
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Correspondence to Sabeel M. Khan.

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Khan, S.M., Sunny, D.A. & Aqeel, M. A variational numerical method based on finite elements for the nonlinear solution characteristics of the periodically forced Chen system. Eur. Phys. J. Plus 132, 395 (2017). https://doi.org/10.1140/epjp/i2017-11673-7

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  • DOI: https://doi.org/10.1140/epjp/i2017-11673-7

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