Abstract
This paper is devoted to the analysis of the sixth-order symplectic and symmetric explicit extended Runge–Kutta–Nyström (ERKN) schemes for solving multi-frequency oscillatory nonlinear Hamiltonian equations. Fourteen practical sixth-order symplectic and symmetric explicit ERKN schemes are constructed, and their phase properties are investigated. The paper is accompanied by five numerical experiments, including a nonlinear two-dimensional wave equation. The numerical results in comparison with the sixth-order symplectic and symmetric Runge–Kutta–Nyström methods and a Gautschi-type method demonstrate the efficiency and robustness of the new explicit schemes for solving multi-frequency oscillatory nonlinear Hamiltonian equations.
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The authors are sincerely thankful to two anonymous reviewers for their valuable suggestions, which help improve the presentation of the manuscript significantly.
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The research of the first author was supported by the National Natural Science Foundation of China under Grant 11401333, by the Natural Science Foundation of Shandong Province under Grant ZR2014AQ003 and by the China Postdoctoral Science Foundation under Grant 2015M580578. The research of the second author was supported in part by the Science Foundations of the Nanjing Institute of Technology under Grant YKJ201114 and under Grant QKJB2011022. The research of the third author was supported by the National Natural Science Foundation of China under Grant 11171178.
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Wang, B., Yang, H. & Meng, F. Sixth-order symplectic and symmetric explicit ERKN schemes for solving multi-frequency oscillatory nonlinear Hamiltonian equations. Calcolo 54, 117–140 (2017). https://doi.org/10.1007/s10092-016-0179-y
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DOI: https://doi.org/10.1007/s10092-016-0179-y
Keywords
- Symplectic and symmetric explicit schemes
- Sixth-order extended Runge–Kutta–Nyström schemes
- Multi-frequency oscillatory nonlinear Hamiltonian equations
- Structure-preserving algorithms