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    • 1. 发明申请
    • BLAST/IMPACT FREQUENCY TUNING AND MITIGATION
    • BLAST / IMPACT频率调谐和缓解
    • US20160298936A1
    • 2016-10-13
    • US15036293
    • 2014-11-14
    • THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    • Michael THOULESSEllen M. ARRUDATanaz RAHIMZADEHAnthony M. WAAS
    • F41H5/04B32B7/02F41H1/04
    • F41H5/04B32B7/02B32B15/08B32B2250/03B32B2307/10B32B2571/00F41H1/04F42D5/045
    • A protective device and method of design to protect against multiple blast and impact events for use in any application in which a delicate target has to be protected. The protective device for mitigating the effects of blast or impact employs a first layer having a first acoustic impedance and a second layer having a second acoustic impedance. The second acoustic impedance is different than the first acoustic impedance. The second layer is proximate to the first layer. The first layer and the second layer are chosen collectively to tune the stress waves from the blast or impact events to one or more specific tuned frequencies. A third layer of a visco-elastic material is employed having a critical damping frequency that matches one or more specific tuned frequencies to dissipate the stress waves of the blast and impact event. The third layer is proximate to the second layer.
    • 一种保护装置和设计方法,用于防止多种爆炸和冲击事件用于任何需要保护微妙目标的应用中。 用于减轻爆炸或冲击的影响的保护装置采用具有第一声阻抗的第一层和具有第二声阻抗的第二层。 第二声阻抗与第一声阻抗不同。 第二层靠近第一层。 集体选择第一层和第二层,以将来自爆炸或撞击事件的应力波调谐到一个或多个特定的调谐频率。 使用第三层粘弹性材料,其具有匹配一个或多个特定调谐频率的临界阻尼频率以消散爆炸和撞击事件的应力波。 第三层靠近第二层。