Indoor accelerated corrosion test structure for lower doorsill of airplane boarding gate

Abstract

The utility model belongs to the field of airplane test piece design, and relates to an indoor accelerated corrosion test structure for a lower doorsill of an airplane boarding gate. The structure comprises a boarding gate frame (1), floor cross beams (2), skin (3), frame edges (4), webs (5), stringers (6), floor longitudinal beams (8) and a floor panel (9), the floor longitudinal beams (8) and the floor cross beams (2) are staggered to form an upper supporting floor framework, the stringers (6) and the frame edges (4) are staggered to form a lower floor framework, the upper supporting floor framework and the lower floor framework are connected through the webs (5) on the left side and the right side, and the upper supporting floor framework and the lower floor framework are connected through the skin (3). The lower floor framework is a curved-surface framework, the front side of the lower floor framework is connected with the front side of the upper supporting floor framework, the connected side of the lower floor framework and the upper supporting floor framework is connected with a boarding gate frame (1), a floor panel (9) is laid on the outer side of the upper supporting floor framework, and a skin (3) is laid on the outer side of the lower floor framework. Effectiveness and accuracy of boarding gate lower threshold indoor accelerated corrosion test results are ensured.

Description

Technical Field

[0001] The present application belongs to the field of aircraft test piece design, and specifically relates to an indoor accelerated corrosion test structure for the lower threshold of an aircraft boarding door. Background Art

[0002] During use, aircraft are subject to a variety of environmental factors, including heat, humidity, salt spray, and mold, making them susceptible to corrosion. Door sills, in particular, are prone to accumulating rainwater and sewage due to their structural characteristics, and are constantly trampled upon by passengers. This makes them highly susceptible to corrosion fatigue, which can lead to structural failure and serious flight accidents. Therefore, assessing and verifying the corrosion resistance of aircraft door sills is crucial. However, the actual structure of door sills is too large to conduct direct indoor accelerated testing. Designing a well-designed, representative structural specimen is crucial for ensuring that test results reflect actual usage.

[0003] GJB150A-2009, "Laboratory Environmental Test Methods for Military Equipment," stipulates that specimen installation should simulate actual operating conditions as closely as possible and operate in accordance with typical operating conditions that are most representative of the equipment's service life. The standard does not explicitly specify the specimen's shape and dimensions. In previous indoor accelerated corrosion tests, most testing companies used sheet specimens. However, due to their significant differences in appearance from actual structures, the results of indoor accelerated corrosion tests using sheet specimens cannot reflect the impact of the structural characteristics of the lower sill of the boarding door on the corrosion resistance of this area, resulting in insufficient guidance and verification of the test results. Utility Model Content

[0004] In order to solve one of the above problems, the present application provides an indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door, which reflects the influence of the structural characteristics of the lower sill of an aircraft boarding door on its corrosion resistance by improving the test piece configuration.

[0005] The structure of the indoor accelerated corrosion test for the lower threshold of the aircraft boarding door in this application mainly includes the boarding door frame, floor beam, skin, frame edge, web, long stringer, floor longitudinal beam and floor panel.

[0006] Among them, the floor longitudinal beams and floor cross beams are staggered to form an upper supporting floor frame, the long stringers and frame edges are staggered to form a lower floor frame, the upper supporting floor frame and the lower floor frame are connected by webs located on the left and right sides, the lower floor frame is a curved frame, and its front side is connected to the front side of the upper supporting floor frame. The lower floor frame and the upper supporting floor frame are connected to the boarding door frame on the side where they are connected, the outer side of the upper supporting floor frame is paved with a floor panel, and the outer side of the lower floor frame is paved with a skin.

[0007] Preferably, the floor longitudinal beams and floor cross beams are connected by bolts.

[0008] Preferably, the long stringer is connected to the frame edge by angle bars and bolts.

[0009] Preferably, the floor panel is connected to the outer side of the upper supporting floor frame by rivets.

[0010] Preferably, the skin is connected to the outer side of the lower floor frame by riveting.

[0011] Preferably, the bolt connection or riveting is performed by wet assembly or sealing with a sealant.

[0012] Preferably, the boarding door frame includes a lower door frame and a side door frame, and the lower door frame and the side door frame are connected by bolts.

[0013] Preferably, the lower door frame includes a plurality of folding panels, wherein the lower panel located at the bottom is an arc-shaped panel, which is attached to and connected to the skin laid on the outer side of the lower floor frame.

[0014] This application can reflect the influence of the structural characteristics of the lower sill of the boarding door on its corrosion resistance, and ensure the validity and accuracy of the indoor accelerated corrosion test results of the lower sill of the boarding door. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall device of a preferred embodiment of the indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door of the present application.

[0016] Among them, 1-boarding door frame, 2-floor crossbeam, 3-skin, 4-frame edge, 5-web, 6-long stringer, 7-angle material, 8-floor longitudinal beam, 9-floor panel, 11-lower door frame, 12-side door frame, 111-lower panel, 112-middle panel, 113-upper panel. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the implementation of this application will be described in more detail below in conjunction with the drawings in the implementation of this application. In the drawings, the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and should not be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in conjunction with the drawings.

[0018] This application provides an indoor accelerated corrosion test structure for the lower threshold of an aircraft boarding door, such as Figure 1As shown, it mainly includes:

[0019] Door frame 1, floor crossbeam 2, skin 3, frame edge 4, web 5, long stringer 6, floor longitudinal beam 8 and floor panel 9,

[0020] Among them, the floor longitudinal beams 8 and the floor cross beams 2 are staggered to form an upper supporting floor frame, the long stringers 6 and the frame edges 4 are staggered to form a lower floor frame, the upper supporting floor frame and the lower floor frame are connected by webs 5 located on the left and right sides, the lower floor frame is a curved frame, and its front side is connected to the front side of the upper supporting floor frame. The lower floor frame and the upper supporting floor frame are connected to the boarding door frame 1 on the side where they are connected. The outer side of the upper supporting floor frame is covered with a floor panel 9, and the outer side of the lower floor frame is covered with a skin 3.

[0021] The present application reflects the influence of the structural characteristics of the lower sill of the boarding door on its corrosion resistance by improving the configuration of the test piece. It can be understood that the so-called "structural characteristics" on its corrosion resistance mainly refers to the different structural shapes, compositions and connection relationships of the lower sill of the boarding door, and its corrosion resistance is also different. For this reason, the present application extracts some key configurations and connection relationships on the original aircraft boarding door structure, and finally forms the above-mentioned technical scheme, wherein the upper supporting floor frame, the lower floor frame and the web form a cavity, and the corrosive substances caused by rainwater and people's footsteps can penetrate into the cavity along the upper supporting floor frame, the lower floor frame and the connection position with the boarding door frame 1. The configuration of each structure, the sealing of the connection parts, etc. can affect the corrosion characteristics, so that the improved structure of the present application can reflect the influence of the structural characteristics of the lower sill of the boarding door on its corrosion resistance.

[0022] In addition, this application uses different materials for different parts of the door sill of the aircraft boarding door. The skin and long stringer are made of aluminum-lithium alloy, and other parts such as the door frame under the boarding door, floor beams, frame edges, webs and connecting parts such as angles, bolts, nuts, rivets, etc. are all made of aluminum alloy.

[0023] In some optional embodiments, the floor longitudinal beam 8 is connected to the floor cross beam 2 by bolts.

[0024] In some optional embodiments, the long stringers 6 are connected to the frame edges 4 via angle bars 7 and bolts. In this embodiment, multiple long stringers 6 are horizontally arranged between two frame edges 4. To increase the strength and stability of the connection between the two, the angle bars 7 are used to connect the long stringers 6 and the frame edges 4. That is, the two edges of the angle bars 7 are respectively connected to the long stringers 6 and the frame edges 4 by bolts.

[0025] In some optional embodiments, the floor panel 9 is connected to the outer side of the upper supporting floor frame by rivets.

[0026] In some optional embodiments, the skin 3 is connected to the outside of the lower floor frame by riveting. In this embodiment, the skin 3 is connected to the long stringer 6 and the frame edge 4 by rivets. In addition, the floor panel 9 is connected to the floor crossbeam 2 and the floor longitudinal beam 8 by rivets, and the web 5 is connected to the frame edge 4 by rivets. The connections between other components are usually bolt and nut connections.

[0027] In some optional embodiments, the bolt connection or riveting is performed by wet assembly or sealing with a sealant, thereby simulating the actual use state of the lower sill structure of the boarding door.

[0028] In some optional embodiments, the boarding door frame 1 includes a lower door frame 11 and a side door frame 12, and the lower door frame 11 and the side door frame 12 are connected by bolts.

[0029] In some optional embodiments, the lower door frame 11 includes a plurality of folded panels, wherein the lower panel 111 located at the bottom is an arc-shaped panel, which is attached to and connected to the skin 3 laid on the outer side of the lower floor frame. Figure 1 The upper plate surface 113 and the middle plate surface 112 are supported and connected by a plurality of connecting pieces, and the middle plate surface 112 is press-fitted and bolted to the floor panel 9 .

[0030] Although the present application has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made based on the present application. Therefore, such modifications or improvements, which do not depart from the spirit of the present application, are within the scope of protection claimed in the present application.

Claims

1. An indoor accelerated corrosion test structure for the lower threshold of an aircraft boarding door, characterized in that: include: Door frame (1), floor beam (2), skin (3), frame edge (4), web (5), long stringer (6), floor longitudinal beam (8) and floor panel (9), The floor longitudinal beams (8) and the floor cross beams (2) are staggered to form an upper supporting floor frame, the long stringers (6) and the frame edges (4) are staggered to form a lower floor frame, the upper supporting floor frame and the lower floor frame are connected through webs (5) located on the left and right sides, the lower floor frame is a curved frame, the front side of which is connected to the front side of the upper supporting floor frame, the lower floor frame and the upper supporting floor frame are connected to the boarding door frame (1) on the side where they are connected, the outer side of the upper supporting floor frame is paved with a floor panel (9), and the outer side of the lower floor frame is paved with a skin (3).

2. The indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door according to claim 1, characterized in that: The floor longitudinal beam (8) and the floor cross beam (2) are connected via bolts.

3. The indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door according to claim 1, characterized in that: The long stringer (6) is connected to the frame edge (4) through angle bars (7) and bolts.

4. The indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door according to claim 1, characterized in that: The floor panel (9) is connected to the outer side of the upper supporting floor frame by rivets.

5. The indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door according to claim 1, characterized in that: The skin (3) is connected to the outer side of the lower floor frame by riveting.

6. The indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door according to any one of claims 2 to 5, characterized in that: When bolting or riveting, wet assembly or sealing is performed using sealants.

7. The indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door according to claim 1, characterized in that: The boarding door frame (1) comprises a lower door frame (11) and a side door frame (12), and the lower door frame (11) and the side door frame (12) are connected by bolts.

8. The indoor accelerated corrosion test structure for the lower sill of an aircraft boarding door according to claim 7, characterized in that: The lower door frame (11) includes a plurality of folded panels, wherein the lower panel (111) located at the bottom is an arc-shaped panel, which is attached to and connected to the skin (3) laid on the outer side of the lower floor frame.

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