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arXiv 1202.2802math.APmath-phmath.MP
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声散射中的近隐身研究

On Near-cloak in Acoustic Scattering

Hongyu Liu

摘要:

考虑了通过变换光学方法实现声散射中的隐形隐身。研究了无源介质和有源/辐射目标的近隐身。从实践的角度来看,我们特别感兴趣的是任意(但规则)内容的伪装。结果表明,除非在结构中引入某种特殊的机制,否则不可能实现近隐身。一个通用的有损层被纳入我们的近隐身设备的建设。我们得到非常准确的估计的散射振幅的正则化参数和材料参数的损耗层在不同的设置。

英文摘要:

Invisibility cloaking in acoustic scattering via the approach of transformation optics is considered. The near-cloaks of both passive medium and active/radiating object are investigated. From a practical viewpoint, we are especially interested in the cloaking of an arbitrary (but regular) content. It is shown that one cannot achieve the near-cloak unless some special mechanism is introduced into the construction. A general lossy layer is incorporated into the construction of our near-cloaking devices. We derive very accurate estimates of the scattering amplitude in terms of the regularization parameter and the material parameters of the lossy layer in different settings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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