Vibration attenuation via tailored metastructures
AssigneePurdue Research Foundation
InventorsFabio Semperlotti, Mehdi Jokar, Siddharth Nair
Life of this patent
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Abstract
The vibration attenuation system includes a load bearing layer, a non-load bearing layer, and a rigid beam connector. The load bearing layer has a first density and a first stiffness. The non-load bearing layer has a second density and a second stiffness. The second density is lower than the first density. The rigid beam connector has a third density and a third stiffness. The rigid beam connector couples the load bearing layer to the non-load bearing layer. The coupling of the non-load bearing layer to the load bearing layer is enabled through the use of the rigid beam connector which provides a nonlocal connection to transfer energy from the load bearing layer to the non-load bearing layer.
Claims19
A vibration attenuation system, comprising:
- a load bearing layer having a first density and a first stiffness;
- a non-load bearing layer having a second density and a second stiffness, wherein the non-load bearing layer includes a primary non-load bearing layer and a secondary non-load bearing layer, the primary non-load bearing layer is substantially disposed between the load bearing layer and the secondary non-load bearing layer;
- and
- a rigid beam connector having a third density and a third stiffness, the rigid beam connector couples the load bearing layer to the non-load bearing layer, the third density is different from each of the first density and the second density;
- wherein each of the primary non-load bearing layer and the secondary non-load bearing layer include a concave surface, a bottom-most point of the concave surface of the primary non-load bearing layer is substantially offset from a bottom-most point of the concave surface of the secondary non-load bearing layer.
A method of using a vibration attenuation system to dissipate a vibration, the method comprising the steps of:
- providing a load bearing layer, a non-load bearing layer, and a rigid beam connector, the load bearing layer having a first density, the non-load bearing layer having a second density, the rigid beam connector having a third density, the rigid beam connector coupling the load bearing layer to the non-load bearing layer, and the third density is different from each of the first density and the second density, wherein the non-load bearing layer includes a primary non-load bearing layer and a secondary non-load bearing layer, the primary non-load bearing layer is substantially disposed between the load bearing layer and the secondary non-load bearing layer, and wherein each of the primary non-load bearing layer and the secondary non-load bearing layer include a concave surface, a bottom-most point of the concave surface of the primary non-load bearing layer is substantially offset from a bottom-most point of the concave surface of the secondary non-load bearing layer;
- applying a vibration to the load bearing layer;
- transferring the vibration from the load bearing layer to the non-load bearing layer;
- and
- attenuating the vibration.
A vibration attenuation system, comprising:
- a load bearing layer having a first density and a first stiffness;
- a non-load bearing layer having a second density and a second stiffness, wherein a surface of the load bearing layer includes a taper having a first diameter and a surface of the non-load bearing layer includes a substantially concave surface having a second diameter, and the second diameter is greater than the first diameter;
- and
- a rigid beam connector having a third density and a third stiffness, the rigid beam connector couples the load bearing layer to the non-load bearing layer, the third density is different from each of the first density and the second density.
Dependencies are inferred from the claim text.