期刊
PHYSICS LETTERS A
卷 382, 期 30, 页码 1957-1961出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2018.04.055
关键词
Intrinsic localized mode; Discrete breather; FPU chain; Nonlinear lattice
资金
- JSPS KAKENHI [JP24654124, JP26400394]
Excitation and propagation of nonlinear localized oscillations are demonstrated experimentally by using a mass-spring chain to emulate those in the celebrated Fermi-Pasta-Ulam chain of beta type. Two types of experiments are performed, one corresponding to a boundary-value problem and the other to an initial-value one. In the former experiment, one end of the chain is driven sinusoidally in the direction of the chain above a cut-off frequency. In the latter experiment, only a number of weights centered around the weight in the middle of the chain are held displaced initially and released suddenly. The experimental results show quantitatively good agreements with the numerical ones. Two videos linked also show visually mobile and stationary localized oscillations. (C) 2018 Elsevier B.V. All rights reserved.
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