Shear to longitudinal mode conversion via second harmonic generation in a two-dimensional microscale granular crystal

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• 作者：S.P. Wallen ; N. Boechler ; ^{boechler@uw.edu}
• 关键词：Granular media ; Nonlinear dynamics ; Periodic structures
• 刊名：Wave Motion
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：68
• 期：Complete
• 页码：22-30
• 全文大小：678 K
• 卷排序：68

文摘

Second harmonic generation in a 2D microscale granular crystal model is studied. The model includes particle rotations and nonlinear normal and shear contact laws. Second harmonics are longitudinal for transverse and longitudinal fundamental modes. Resonant and antiresonant wave numbers are found for transverse fundamental modes. The antiresonance is prohibited if rotations are not included in the model.