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The generalized Duffing oscillator
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DOI：10.1016/j.cnsns.2020.105526.png)
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A generalized Duffing oscillator is considered, which takes into account high-order derivatives and power nonlinearities. The Painlevetest is applied to study the integrability of the mathematical model. It is shown that the generalized Duffing oscillator passes the Painlevetest only in the case of the classic Duffing oscillator which is described by the second-order differential equation. However, in the general case there are the expansion of the general solution in the Laurent series with two arbitrary constants. This allows us to search for exact solutions of generalized Duffing oscillators with two arbitrary constants using the classical Duffing oscillator as the simplest equation. The algorithm of finding exact solutions is presented. Exact solutions for the generalized Duffing oscillator are found for equations of fourth, sixth, eighth and tenth order in the form of periodic oscillations and solitary pulse. (C) 2020 Elsevier B.V. All rights reserved.
Keyword:
Duffing oscillator
Painlevetest
Exact solution
Periodic oscillations
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Application of simplest equations of Bernoulli and Riccati kind for obtaining exact traveling-wave solutions for a class of PDEs with polynomial nonlinearityBernoulli和Riccati类最简单方程在获得一类多项式非线性pde的精确行波解中的应用
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