IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0727830
(2000-11-30)
|
우선권정보 |
DE-0031510 (2000-06-28) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
28 인용 특허 :
6 |
초록
▼
When stiffening members, such as stringers and frame members, are welded onto a skin sheet to form an aircraft fuselage shell, a crack originating in the skin sheet tends to propagate through the weld joints into the stiffening members. In order to prevent crack propagation into a stiffening member,
When stiffening members, such as stringers and frame members, are welded onto a skin sheet to form an aircraft fuselage shell, a crack originating in the skin sheet tends to propagate through the weld joints into the stiffening members. In order to prevent crack propagation into a stiffening member, the stiffening member is reinforced with a web doubler plate or a tension band made of high strength steel or titanium alloys or fiber-reinforced composites. The doubler plate is riveted or adhesively bonded onto a stiffening member web, or the tension band is crimped into the stiffening member web. The resulting fuselage shell structure has crack stopping properties and thus an increased residual strength, so it can be used with welded joints at all areas of the fuselage shell, including the top and sides as well as the bottom of the fuselage.
대표청구항
▼
When stiffening members, such as stringers and frame members, are welded onto a skin sheet to form an aircraft fuselage shell, a crack originating in the skin sheet tends to propagate through the weld joints into the stiffening members. In order to prevent crack propagation into a stiffening member,
When stiffening members, such as stringers and frame members, are welded onto a skin sheet to form an aircraft fuselage shell, a crack originating in the skin sheet tends to propagate through the weld joints into the stiffening members. In order to prevent crack propagation into a stiffening member, the stiffening member is reinforced with a web doubler plate or a tension band made of high strength steel or titanium alloys or fiber-reinforced composites. The doubler plate is riveted or adhesively bonded onto a stiffening member web, or the tension band is crimped into the stiffening member web. The resulting fuselage shell structure has crack stopping properties and thus an increased residual strength, so it can be used with welded joints at all areas of the fuselage shell, including the top and sides as well as the bottom of the fuselage. 1. Boarding access device, for an aircraft including a passenger compartment delimited by the aerodynamic shell of the aircraft, the device being characterised by the fact that it consists of at least one tunnel mounted on the outside of the said aerodynamic shell, attached to the trailing edge of the latter and orientated rearwards and in a direction approximately parallel to the aircraft longitudinal axis, and a door normally closing off the opening between the passenger compartment and the tunnel. 2. Device in accordance with claim 1, in which the aircraft is a flying wing. 3. Device in accordance with claim 2, in which several tunnels are located between adjacent elevons articulated from the trailing edge of the aerodynamic shell of the flying wing. 4. Device in accordance with claim 1, in which each tunnel is located approximately in-line with the aisle formed between the seat rows in the aircraft passenger compartment. 5. Device in accordance with claim 1, in which each tunnel incorporates at least one rear detachable section, which can be jettisoned in emergency conditions. 6. Device in accordance with claim 5, in which the rear detachable section is articulated from a fixed front section of the tunnel, in order to be able to pivot to one side, like a door, to enable passengers to embark and disembark. 7. Device in accordance with claim 5, in which the rear detachable part of each tunnel is shaped approximately like a cone. 8. Device in accordance with claim 5, in which an inflatable escape slide is fitted in each tunnel, at the rear of the front fixed section on which the rear detachable section is mounted. 9. Device in accordance with claim 5, in which a fixed front section of each tunnel, to which the rear detachable section is mounted, incorporates a floor articulated close to the threshold of the door, the said floor being able to hinge downwards to form an escape slide for the emergency evacuation of passengers. 10. Device in accordance with claim 9, in which the articulated floor is fitted with steps, for embarking and disembarking passengers. 11. Flying wing including a passenger compartment delimited by an aerodynamic shell and a boarding access device consisting of at least one tunnel attached to the outside of the said aerodynamic shell, attached to the trailing edge of the latter and orientated rearwards in a direction approximately parallel to the longitudinal axis of the aircraft, and with a door normally closing off the opening between the passenger compartment and the tunnel.
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