On the coupling mechanism between nonlinear solitary waves and slender beams
On the coupling mechanism between nonlinear solitary waves and slender beams
复制标题
DOI：
10.1016/j.ijsolstr.2013.08.018
复制
发表时间：
2013-12-01
影响因子：
3.6
通讯作者：
Al-Nazer, Leith
中科院分区：
文献类型：
--
作者：
Cai, Luyao;Rizzo, Piervincenzo;Al-Nazer, Leith
本文研究了沿着颗粒系统传播的高度非线性孤立波与颗粒介质接触的细长梁之间的耦合机制。非线性孤立波是紧凑的非色散波，可以在非线性系统中形成和传播，例如一维粒子链，其中它们通常由撞击器的机械冲击产生。这些波具有恒定的空间波长，其速度、振幅和持续时间可以通过修改粒子的材料或大小或撞击器的速度来调整。在本文的研究中，我们数值研究了沿着颗粒链传播的孤立波与细长梁之间的相互作用。一些数值结果进行了实验验证。我们发现，梁的几何和机械性能或施加到梁的热应力改变孤立波的某些功能。在未来，这些发现可能会被用来开发一种新的传感系统的无损评估梁。(C)2013爱思唯尔有限公司保留所有权利。
This paper describes the coupling mechanism between highly nonlinear solitary waves propagating along a granular system and slender beams in contact with the granular medium. Nonlinear solitary waves are compact non-dispersive waves that can form and travel in nonlinear systems such as one-dimensional chains of particles, where they are conventionally generated by the mechanical impact of a striker. These waves have a constant spatial wavelength and their speed, amplitude, and duration can be tuned by modifying the particles' material or size, or the velocity of the striker. In the study presented in this article we investigated numerically the interaction between solitary waves propagating along a chain of granular particles and a slender beam. Some of the numerical findings were validated experimentally. We found that the geometric and mechanical properties of the beam or thermal stress applied to the beam alter certain features of the solitary waves. In the future, these findings may be used to develop a novel sensing system for the nondestructive assessment of beams. (C) 2013 Elsevier Ltd. All rights reserved.