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US 10,094,641 B2Granted
Blast/impact frequency tuning and mitigation
AssigneeThe Regents of the University of Michigan
InventorsMichael Thouless, Ellen M. Arruda, Tanaz Rahimzadeh, Levon Cimonian, Marie Rice
Life of this patent
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Abstract
A tuning and mitigation system and method for mitigating a blast or impact event having an elastic layer having an acoustic impedance chosen to tune stress waves resulting from the blast or impact to one or more specific tuned frequencies, and a dissipative layer made of a viscoelastic material having a critical damping frequency that matches at least one or more specific tuned frequencies.
Claims11
A method for mitigating a blast or impact event, the method comprising:
- collectively choosing an elastic layer and a viscoelastic dissipative layer to tune stress waves resulting from the blast or impact to one or more specific tuned frequencies that match a critical damping frequency of the dissipative layer such that densities and thicknesses of the elastic layer and of the dissipative layer are matched to an unrelaxed modulus, relaxed modulus, and critical frequency of the dissipative layer;
- and
- positioning the dissipative layer proximate to the elastic layer.
Dependencies are inferred from the claim text.