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首页> 外文期刊>Bulletin of the American Physical Society >APS -APS March Meeting 2017 - Event - Trapping solitary waves as localized modes in granular chains with soft grains
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APS -APS March Meeting 2017 - Event - Trapping solitary waves as localized modes in granular chains with soft grains

机译：APS -APS 2017年3月会议-事件-将孤立波捕获为具有软颗粒的颗粒链中的局域模

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Granular chains have numerous applications, from shock absorption and vibration reduction, to detecting buried objects, to energy localization. As energy is transferred between grains they deform slightly, and the contact potential arising from the elastic deformation of grains is given by the nonlinear Hertz law. The discrete nature of these systems in combination with the nonlinear contact interaction between grains leads to complex collective behavior. I will discuss the dynamics of granular chains and, in particular, I will show how solitary wave propagation in these systems is affected by grain softness, and how introducing inertial mismatches affects the reflection of solitary waves at boundaries. I will further show how initial solitary wave energy can be trapped into localized modes with predictable frequencies in chains with soft central grains.
机译：颗粒链具有广泛的应用，从减震和减振到探测掩埋物体，再到能量定位。当能量在晶粒之间传递时，它们会轻微变形，而晶粒的弹性变形所产生的接触电势由非线性赫兹定律给出。这些系统的离散性质与晶粒之间的非线性接触相互作用共同导致了复杂的集体行为。我将讨论颗粒链的动力学，特别是，我将展示颗粒软度如何影响这些系统中孤立波的传播，以及引入惯性失配如何影响孤立波在边界处的反射。我将进一步展示如何将初始孤立波能量捕获到具有中心软质链的可预测频率的局部模式中。

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