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    • 4. 发明授权
    • Shock wave barrier using multidimensional periodic structures
    • 使用多维周期结构的冲击波屏障
    • US08555768B1
    • 2013-10-15
    • US13093602
    • 2011-04-25
    • Delmar L. BarkerKenneth L. MooreWilliam R. Owens
    • Delmar L. BarkerKenneth L. MooreWilliam R. Owens
    • F41H5/24
    • F41H5/06F41H5/007F42D5/045
    • A shock wave barrier comprises a periodic structure having the proper symmetry and local contrast modulation of the acoustic index to divert an incident shock wave by using constructive/destructive interference phenomena that produce a “band gap” in the transmission spectrum of the periodic structure. In general, shock wave energy within the band gap is reflected from the structure. Defect cavities may be formed in the periodic structure to create transmission resonances or “windows” in the band gap. A portion of the incident energy passes through the window and is concentrated in the defect cavities where it is dissipated by other means. The band gap can be quite wide, at least 50% of the center wavelength, and thus can provide an effective barrier from a wide variety of threats with varying blast pressure and range. The structure may be periodic in two or three dimensions providing a band gap barrier in two or three dimensions, respectively.
    • 冲击波屏障包括通过使用在周期性结构的透射光谱中产生“带隙”的建构性/相消干涉现象,具有声学指数的适当对称性和局部对比度调制以转移入射冲击波的周期性结构。 一般来说,带隙内的冲击波能量从结构中反映出来。 可以在周期性结构中形成缺陷腔,以在带隙中产生传输谐振或“窗口”。 入射能量的一部分通过窗口并集中在缺陷腔中,在其中通过其它方式消散。 带隙可以相当宽,至少占中心波长的50%,从而可以提供来自各种各样的威胁的有效屏障,具有不同的鼓风压力和范围。 该结构可以是两维或三维的周期性的,分别提供两维或三维的带隙势垒。
    • 6. 发明申请
    • ACOUSTIC CRYSTAL EXPLOSIVES
    • 声学水晶爆炸
    • US20120006216A1
    • 2012-01-12
    • US12473275
    • 2009-05-28
    • Delmar L. BarkerKenneth L. MooreWilliam R. Owens
    • Delmar L. BarkerKenneth L. MooreWilliam R. Owens
    • F42D1/04C06B45/00
    • F42B12/207C06B45/00C06C7/00F42B39/14F42D5/04
    • An acoustic crystal explosive, which gains its properties from both its periodic structure and its composition, may be configured to suppress or enhance the sensitivity of detonation of the explosive in response to an acoustic wave. An explosive material and a medium (explosive or inactive) are arranged in a periodic array that provides local contrast modulation of the acoustic index to define a band gap in the acoustic transmission spectrum of the explosive materials. At least one defect cavity in the periodic array creates a resonance in the band gap. The defect cavity concentrates energy from an incident acoustic (shock) wave to detonate the explosive. Multiple defect cavities may be configured to provide a desired shaped charge or volumetric detonations. Means may be provided to reprogram the defect cavity(ies) to reconfigure the explosive.
    • 从其周期性结构及其组成中获得其性质的声晶体炸药可以被配置为抑制或提高爆炸物响应于声波的爆震的灵敏度。 爆炸性材料和介质(爆炸性或非活性)以周期性阵列布置,其提供声学指数的局部对比度调制以限定爆炸材料的声学透射谱中的带隙。 周期性阵列中的至少一个缺陷腔在带隙中产生共振。 缺陷腔集中来自入射声(冲击)波的能量以引爆炸药。 多个缺陷腔可以被配置成提供期望的成形电荷或体积爆炸。 可以提供装置以重新编程缺陷腔以重新配置炸药。