US 9,810,279 B2
Vibratory bandgap device
Allen J. Bronowicki, Laguna Niguel, CA (US)
Assigned to Northrop Grumman Systems Corporation, Falls Church, VA (US)
Filed by Allen J. Bronowicki, Laguna Niguel, CA (US)
Filed on Sep. 10, 2010, as Appl. No. 12/807,660.
Prior Publication US 2012/0061892 A1, Mar. 15, 2012
Int. Cl. F16F 7/00 (2006.01); F16F 3/087 (2006.01); F16F 7/108 (2006.01)
CPC F16F 7/108 (2013.01) 17 Claims
OG exemplary drawing
 
1. A vibratory isolator, comprising:
a periodic alternating structure comprising:
a plurality of mass inertia components, wherein at least one mass inertia component comprises a disk; and
a plurality of compliant components attaching adjacent mass inertia components to each other, wherein at least one compliant component comprises a ring,
wherein at least one ring is sandwiched between two disks, and
wherein at least one ring is in contact with at least two disks,
the periodic alternating structure alternating between the disks and the rings,
the vibratory isolator providing a vibratory bandgap having a range of frequencies through which vibrations cannot pass, the vibratory bandgap being bounded by an upper rocking mode frequency of approximately 85 Hertz (Hz), the vibratory bandgap being bounded by a lower shearing mode frequency of approximately 60 Hertz (Hz).