横截面
色散(光学)
兰姆波
物理
材料科学
声学
波传播
结构工程
机械
光学
工程类
标识
DOI:10.1177/10775463241286002
摘要
Guided waves propagating in three layered sandwich structures with extremely soft inner layer and thin stiff outer layers reveal peculiar phenomena related to the appearance of dual zero group velocities (ZGV) in the fundamental symmetric branch, transverse (quasi) resonances, and transverse energy fluxes, causing “ringing” of the plates and even material damage. The current research relates to sandwich plates, satisfying the so-called Wiechert condition. The analysis is based on the combined method comprising Cauchy sextic formalism and the exponential fundamental matrix method.
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