Method and apparatus for resonance frequency response attenuation

• US 20080073099A1
• Filed: 09/21/2006
• Published: 03/27/2008
• Est. Priority Date: 09/21/2006
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Valko, Patrick John, O'Neil, Edward Michael, Howard, David Clarence
• Granted Patent: US 7,525,041 B2
• Time in Patent Office: Days
• US Class Current: 174/28
• CPC Class Codes: F01D 25/04 Antivibration arrangements
• CPC Class Codes: F02C 7/00 Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants controlling F02C9/00
• CPC Class Codes: F05D 2260/96 Preventing, counteracting or reducing vibration or noise
• CPC Class Codes: H02G 3/0412 Heat or fire protective means for fire in electric circuits A62C3/16
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A method for attenuating resonance frequency responses is disclosed. The method includes encasing at least one conducting element within a protective sheath and disposing a damping element about the at least one conducting element. The damping element is fixedly secured to the at least one conducting element for inhibiting relative movement between the damping element and the conduit. The method also includes positioning the at least one conducting element concentrically within a conduit to define a gap between the at least one conducting element and the conduit.

Claims

1. A method for attenuating resonance frequency responses, comprising:

encasing at least one conducting element within a protective sheath;

disposing a damping element about the at least one conducting element, wherein the damping element is fixedly secured to the at least one conducting element for inhibiting relative movement between the conducting element and a conduit; and

positioning the at least one conducting element concentrically within the conduit to define a gap between the at least one conducting element and the conduit.

2. The method in accordance with claim 1, further comprising:

disposing a plurality of conducting elements concentrically within the conduit; and

applying at least one spacing wire longitudinally disposed adjacent at least a pair of the plurality of conducting elements.

3. The method in accordance with claim 1, further comprising positioning the damping element helically about and circumscribing the at least one conducting element, wherein the damping element contacts an inner surface of the conduit.

4. The method in accordance with claim 1, wherein the damping element is made from material selected from the group consisting of, nickel, rubber, copper, steel and visco-elastic material.

5. The method in accordance with claim 1, further comprising positioning at least one other damping element adjacent the damping element, the damping element and the at least one other damping element being disposed helically about and circumscribing the at least one conducting element, wherein the at least one other damping element is fixedly secured to the at least one conducting element for preventing relative movement between the at least one other damping element and the conducting element, and for tuning the resonance frequency response of the conducting element.

6. The method in accordance with claim 1, further comprising varying a pitch spacing of the damping element for tuning the resonance frequency response of the conducting element.

7. The method in accordance with claim 1, further comprising varying the gap width to facilitate tuning of the resonance frequency response of the conducting element.

8. The method in accordance with claim 2, wherein the damper element comprises a visco-elastic material, the method further comprising applying the visco-elastic material about the plurality of conducting elements each encased in a protective sheath and about the plurality of spacing wires.

9. The method in accordance with claim 1, wherein the damper element further comprises a wire mesh material.

10. The method in accordance with claim 1 further comprising brazing the damping element to the protective sheath encasing the at least one conducting element.

11. The method in accordance with claim 9 wherein the wire mesh material circumscribes the at least one conducting element encased in a protective sheath to form a plurality of wire mesh layers circumscribing the at least one conducting element encased in the protective sheath, and wherein the wire mesh material is brazed to the protective sheath and each of the plurality of wire mesh layers is brazed to another of the plurality of the wire mesh layers.

12. A resonance frequency response attenuation apparatus, comprising:

a conduit;

at least one conducting element encased in a protective sheath;

a damping element disposed about the at least one conducting element, wherein the damping element is fixedly secured to the at least one conducting element for inhibiting relative movement between the conducting element and a conduit, and wherein the at least one conducting element is disposed concentrically within the conduit and defines a gap between the conduit and the at least one conducting element.

13. The apparatus in accordance with claim 12, further comprising:

a plurality of conducting elements disposed concentrically within the conduit; and

at least one spacing wire longitudinally disposed adjacent at least a pair of the plurality of conducting elements.

14. The apparatus in accordance with claim 12, wherein the damping element is disposed helically about the at least one conducting element and is in contact with an inner surface of the conduit.

15. The apparatus in accordance with claim 12, wherein the damping element is made from material selected from the group consisting of nickel, rubber, copper, steel and visco-elastic material.

16. The apparatus in accordance with claim 12, further comprising at least one other damping element disposed adjacent and parallel to the damping element and the at least one other damping element being disposed helically about and circumscribing the at least one conducting element, wherein the at least one other damping element is fixedly secured to the at least one conducting element for preventing relative movement between the at least one other damping element and the conducting element, and for tuning the resonance frequency response of the at least one conducting element.

17. The apparatus in accordance with claim 12, wherein the damping element has a variable pitch spacing for tuning the resonance frequency response of the conducting element.

18. The apparatus in accordance with claim 12, wherein the gap width is variable to facilitate tuning of the resonance frequency response of the conducting element.

19. The apparatus in accordance with claim 13, wherein the damping element comprises a visco-elastic material disposed about the plurality of conducting elements each encased within the protective sheath and about the plurality of spacing wires.

20. The apparatus in accordance with claim 12, wherein the damper element comprises a wire mesh material.