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强非线性耗散颗粒链中两波结构的观测

Observation of two-wave structure in strongly nonlinear dissipative granular chains.

作者信息

Rosas Alexandre, Romero Aldo H, Nesterenko Vitali F, Lindenberg Katja

机构信息

Departamento de Física, CCEN, Universidade Federal da Paraíba, Caixa Postal 5008, 58059-900 João Pessoa, PB, Brazil.

出版信息

Phys Rev Lett. 2007 Apr 20;98(16):164301. doi: 10.1103/PhysRevLett.98.164301. Epub 2007 Apr 18.

DOI:10.1103/PhysRevLett.98.164301
PMID:17501420
Abstract

In a strongly nonlinear viscous granular chain impacted by a single grain we observe a wave disturbance that consists of two parts exhibiting two time scales of dissipation. Above a critical viscosity there is no separation of the two pulses, and the dissipation and nonlinearity dominate the shocklike attenuating pulse.

摘要

在由单个颗粒撞击的强非线性粘性颗粒链中，我们观察到一种波扰动，它由两部分组成，呈现出两种耗散时间尺度。在临界粘度以上，两个脉冲没有分离，耗散和非线性主导着类激波衰减脉冲。