Aircraft special-shaped surface structure top pressure type anti-deflection loading device for force and heat testing
A loading device and anti-deflection technology, which is applied in other test fields, can solve problems such as the influence of structural load-bearing performance and the application of thermal loads, and achieve the effect of ensuring test safety
Inactive Publication Date: 2019-01-11
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +1
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Problems solved by technology
Due to the ultra-high temperature of the structure, the use of bladder loading will affect the application of thermal load, and due to the sensitivity of composite materials to hole defects, the way of applying tensile load by multi-point drilling will have a great impact on the bearing performance of the structure
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[0020] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0021] The safety design of top pressure loading with special-shaped surface structure includes two aspects. One is that when the loading top block is subjected to its own gravity or in the test process, the servo cylinder suddenly retracts. When it retracts to a certain extent, there is a loading top block The possibility of crushing the heating element; the second is that during the loading process, when the loading top block is attached to the surface of the test piece, the loading top block may be ...
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The invention discloses an aircraft special-shaped surface structure top pressure type anti-deflection loading device for force and heat testing. The aircraft special-shaped surface structure top pressure type anti-deflection loading device comprises a force-bearing structure, a loading top block designed according to the profile of the force-bearing structure, a heating element, a heater launching plate, a loading ejector pin and a force meter, wherein the loading ejector pin passes through the heater launching plate and the heating element and is in threaded connection with the force meter.The aircraft special-shaped surface structure top pressure type anti-deflection loading device further comprises a limiting plate and a limiting sleeve, wherein the limiting plate is in threaded connection with the force meter; the limiting sleeve is composed of an inner sleeve and an outer sleeve; and the height of the limiting sleeve is changed by rotation. The aircraft special-shaped surface structure top pressure type anti-deflection loading device for force and heat testing has the advantages of high structural reliability, large number of loading points, high loading safety and unattended loading, is extendable and designable and is suitable for force load loading in force and heat combined testing of different scales and different structural parts in special environments.
Description
technical field [0001] The invention is applicable to the pressure-type loading on the surface of the structure in the combined force-heat test of the aircraft structure, and other test fields using the pressure-type loading. Background technique [0002] During the launch and flight of a space vehicle, the structure of the vehicle will face overload, aerodynamic pressure and thermal environment. Under the action of these loads, the structure of the vehicle may be damaged. Part of the structure can use the loading ring structure to apply concentrated force loads, thereby simulating the loads on the aircraft during flight. For low temperature conditions (below 200°C), bladder loading can be used to simulate external pressure loads. For some metals For the structure, the load on the aircraft structure can be simulated by applying a tensile load through multi-point drilling without affecting the thermal load applied to the structure. [0003] With the development of high-speed...
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Login to View More IPC IPC(8): G01N3/18G01N3/02
CPCG01N3/02G01N3/18G01N2203/0019G01N2203/0048G01N2203/0228
Inventor 罗俊清肖建伟刘涛何西波张黎马星博薛宇轩韩铭李芮
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG