Dynamic load shear test device and method for emergency disconnection self-sealing structure

Abstract

The invention discloses a dynamic load shear test device and method for an emergency disconnection self-sealing structure, and belongs to the technical field of emergency disconnection testing. The device comprises a structural member, a base, a dynamic load loading platform, a fixed pulley, a drop hammer and a rubber pad, wherein the base is fixed for supporting the structural member; the dynamicload loading platform is connected to the structural member; and the drop hammer is suspended directly above the bearing surface of the dynamic load loading platform through a steel wire rope and thefixed pulley. The test device provided by the invention is simple in structure, convenient to process and simple to operate, can realize the shear test of the structural member under different impactloads, and can further limit the load application time and the change of the clamp speed at the same time, thereby reflecting the mechanical behavior of the structural member under different impact energies, supplementing the blanks in the research on the dynamic load shear test of the emergency disconnection self-sealing structure, and being of great significance for further examining the qualification of the emergency disconnection self-sealing structure and further standardizing the use conditions of the emergency disconnection self-sealing structure.

Description

technical field [0001] The invention relates to a dynamic load shearing test device and method for an emergency disconnection self-sealing structure, belonging to the technical field of emergency disconnection testing. Background technique [0002] The emergency disconnect self-sealing structure is an indispensable unit in aviation hydraulic, liquid cooling and fuel systems. It is a pre-set weak area in a certain part of the self-sealing structure, which is often used for the connection between the fuel tank and the fuel conduit, and the connection between the fuel tank and the fuel tank. And the structural deformation of the helicopter may cause the fuel system to destroy some points of the connection. In an emergency situation, such as when the aircraft crashes or there is a risk of crashing, it is required that the emergency disconnection self-sealing structure is subjected to a certain load, and its weak area is fractured to protect the fuel system. At the same time, in...

AI Technical Summary

Problems solved by technology

[0003] At present, domestic research on emergency disconnection self-sealing structures is still in its infancy, and there is no relevant public report on its dynamic load shear test research

At the same time, most of the devices and methods for dynamic load tests at this stage focus on tensile dynamic load tests, and leverage loading-load amplification mechanisms are often used to convert impact loads into required test loads. The complexity of the force transmission path leads to It is difficult to further limit the load action time and fixture speed variation

In addition, due to the complex stress form of the emergency disconnect self-sealing structure during use, a single pull-off test cannot accurately reflect its stress and damage state in use

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