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arXiv 0812.0662nlin.PS
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颗粒晶体中的耗散孤波

Dissipative Solitary Waves in Granular Crystals

R. Carretero-Gonzalez, D. Khatri, Mason A. Porter, P. G. Kevrekidis, C. Daraio

摘要:

我们提供了一个定量表征的耗散效应在一维粒状晶体。我们使用高度非线性孤立波的传播作为诊断工具,并开发优化方案,允许一个计算相关的指数和前因子的耗散项的运动方程。因此,我们提出了一个定量准确的扩展赫兹模型,包括耗散效应通过离散拉普拉斯的速度。钢,黄铜和聚四氟乙烯的实验和计算揭示了一个{ \em共同}耗散指数与材料相关的前因子。

英文摘要:

We provide a quantitative characterization of dissipative effects in one-dimensional granular crystals. We use the propagation of highly nonlinear solitary waves as a diagnostic tool and develop optimization schemes that allow one to compute the relevant exponents and prefactors of the dissipative terms in the equations of motion. We thereby propose a quantitatively-accurate extension of the Hertzian model that encompasses dissipative effects via a discrete Laplacian of the velocities. Experiments and computations with steel, brass, and polytetrafluoroethylene reveal a {\em common} dissipation exponent with a material-dependent prefactor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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