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arXiv 1804.07628nlin.PS
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非线性网络波动方程的局部解

Localized solutions of nonlinear network wave equations

J. G. Caputo, I. Khames, A. Knippel, A. B. Aceves

摘要:

研究了有限个任意网络上非线性图形波动方程的局部化解。假设在图的一个节点上有一个大振幅的局部化初始条件,我们用Duffing方程来近似它的演化。网络的其余部分满足受激励节点强迫的线性系统。通过将非线性图形波动方程化为离散的非线性薛定谔方程并进行傅立叶分析,验证了这种近似。最后,我们研究了数值的参数平面中的本地化,耦合与振幅的条件,并表明本地化振幅取决于最大正常的本征频率。

英文摘要:

We study localized solutions for the nonlinear graph wave equation on finite arbitrary networks. Assuming a large amplitude localized initial condition on one node of the graph, we approximate its evolution by the Duffing equation. The rest of the network satisfies a linear system forced by the excited node. This approximation is validated by reducing the nonlinear graph wave equation to the discrete nonlinear Schrodinger equation and by Fourier analysis. Finally, we examine numerically the condition for localization in the parameter plane, coupling versus amplitude and show that the localization amplitude depends on the maximal normal eigenfrequency.

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