Elongated structures and related assemblies

• US 9,950,779 B2
• Filed: 11/15/2016
• Issued: 04/24/2018
• Est. Priority Date: 06/26/2014
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Griess, Kenneth H., MacKenzie, Karen D.
• Primary Examiner(s): Adamos, Theodore V
• Application Number:
  US15/352,254
• Publication Number:
  US 20170057610A1
• Time in Patent Office: 525 Days
• Field of Search: 52831, 52836, 52837, 52838, 52846, 244199, 244120, 2441181
• CPC Class Codes: B64C 1/06 Frames; Stringers; Longerons ; Fuselage sections
• CPC Class Codes: B64C 1/064 Stringers; Longerons
• CPC Class Codes: B64C 3/18 Spars; Ribs; Stringers
• CPC Class Codes: B64C 3/182 Stringers, longerons

Abstract

An elongated structure comprising a web extending along a length of the elongated structure and a flange comprising a first flange portion, the first flange portion extending away from an area of the web. The first flange portion comprises a variable width along at least a portion of the length of the elongated structure. The first flange portion of the elongated structure may comprise the variable width the length of the elongate structure. The first flange portion may comprise a constant width along at least a portion of the length of the elongated structure. The elongated structure may further comprise a second flange portion. The second flange portion may comprise a variable width along at least a portion of the length of the elongate structure. The first flange portion may comprise a first top flange portion.

Claims

1. A method for supporting a structural load in a vehicle, comprising the steps of:

loading a first load onto an elongated structure, the first load being received in a first flange of the elongated structure, the first flange comprising a variable width along at least a portion of the elongated structure, wherein the elongated structure comprises the first flange and a second flange, which extend from opposing ends of a web, and

unloading the first load on the elongated structure,

wherein the vehicle comprises the elongated structure and a plurality of frame members,

wherein the elongated structure extends through an opening in each of the plurality of frame members,

wherein the first flange comprises a plurality of narrower flange sections and a plurality wider flange sections,

wherein the plurality of wider flange sections are each provided between adjacent frame members of the plurality of frame members, and

wherein each narrower flange section is provided at and through the opening in a respective one of the plurality of frame members.

2. The method of claim 1, wherein the first load is provided when the vehicle is airborne.

3. The method of claim 2, wherein the first load is unloaded when the vehicle is not airborne.

4. The method of claim 1, wherein the first load varies along a length of the first flange.

5. The method of claim 1, wherein the variable width of the first flange varies with load along a length of the first flange.

6. The method of claim 1, wherein the vehicle is an aircraft and the elongated structure extends parallel to a longitudinal axis of a fuselage of the aircraft.

7. The method of claim 1, wherein the first flange is a top flange of the elongated structure.

8. The method of claim 1, wherein the first flange is a bottom flange of the elongated structure.

9. A method for supporting a structural load in a vehicle, comprising the steps of:

loading a first load onto an elongated structure, wherein the elongated structure comprises;

a web extending along a length of the elongated structure,

a bottom flange extending away from the web, the bottom flange being coupled to a skin assembly of the vehicle, and

a top flange comprising a first flange portion, the first flange portion extending away from an area of the web, wherein the first flange portion of the top flange comprises a variable width along at least a portion of the length of the elongated structure;

responsive to loading the first load onto the elongated structure, receiving the first load in the first flange portion of the elongated structure; and

unloading the first load on the elongated structure,

wherein the elongated structure passes through an opening provided by a frame member so as to extend through the frame member,

wherein the at least the portion of the length of the elongated structure extends from the frame member to an adjacent frame member,

wherein the width of the first flange portion increases along a first section from the frame member to a mid-bay location, and

wherein the width of the first flange portion decreases along a second section from the mid-bay location to the adjacent frame member.

10. The method of claim 9, wherein a portion of the top flange is coplanar with a portion of the length of the web so as to define a generally planar surface used as a mounting surface for mounting an elongated structure clip to the elongated structure.

11. The method of claim 10, further comprising coupling, via a mounting clip, the generally planar surface of the elongated structure to a planar surface of a web of the frame member.

12. The method of claim 10, wherein the elongated structure is configured to withstand a structural load that varies over the length of the elongated structure, and

wherein the variable width along the at least the portion of the length of the elongated structure varies as a function of the structural load over the at least the portion of the length.

13. The method of claim 12, further comprising varying the structural load over the length of the elongated structure.

14. The method of claim 13, wherein the structural load increases along the first section and the structural load decreases along the second section.

15. The method of claim 9, wherein the elongated structure further comprises a second top flange portion.

16. The method of claim 15, wherein the second top flange portion of the elongated structure comprises the variable width along the at least the portion of the length of the elongated structure.

17. The method of claim 16, wherein the first flange portion and the second flange portion are symmetric along the at least the portion of the length of the elongated structure.

18. The method of claim 9, wherein the first flange portion comprises a first section, a second section, and a third section having different widths.

19. A method for supporting a structural load in a vehicle, comprising the steps of:

loading a first load onto an elongated structure, wherein the elongated structure comprises;

a web extending along a length of the elongated structure,

a bottom flange extending away from the web, the bottom flange being coupled to a skin assembly of the vehicle, and

a top flange comprising a first flange portion and a second flange portion, the first flange portion and the second flange portion extending away from an area of the web in opposing directions traverse to the length, wherein the first flange portion of the top flange and the second flange portion of the top flange each comprises a variable width along at least a portion of the length of the elongated structure;

wherein the vehicle comprises the elongated structure and a plurality of frame members,

wherein the elongated structure extends through an opening in each of the plurality of frame members,

wherein the top flange comprises a plurality of narrower flange sections and a plurality of wider flange sections,

wherein the plurality of wider flange sections are each provided between adjacent frame members of the plurality of frame members, and

wherein each narrower flange section is provided at and through the opening in a respective one of the plurality of frame members;

responsive to loading

the first load onto the elongated structure, receiving the first load in the first flange portion of the elongated structure; and

unloading the first load on the elongated structure.

20. The method of claim 19, wherein the first flange portion and the second flange portion are symmetric along the at least the portion of the length of the elongated structure.