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A dynamic load shearing test device and method for emergency disconnection self-sealing structure

A test device and dynamic load technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of limited load action time and fixture speed variation, inability to accurately reflect the force situation and damage state, dynamic load shear test There are no relevant public reports in the research, so as to achieve the effect of simple test steps, perfect test plan, and convenient radial shear load range

Active Publication Date: 2021-11-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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

Method used

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  • A dynamic load shearing test device and method for emergency disconnection self-sealing structure
  • A dynamic load shearing test device and method for emergency disconnection self-sealing structure
  • A dynamic load shearing test device and method for emergency disconnection self-sealing structure

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Embodiment Construction

[0035] In order to make the object, technical solution and effect of the present invention clearer and clearer, the following examples are given to further describe the present invention in detail. It should be pointed out that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0036] Such as figure 1As shown, the present invention discloses a dynamic load shearing test device for emergency breaking self-sealing structure, including a fixed pulley block assembly and a drop weight assembly, which specifically includes a fixed table 1, a steel wire rope 2, a fixed pulley 3, and a drop weight 4 , acceleration sensor 5, dynamic signal analyzer 6, fixed test platform 7, clamping device for structural parts 8, base 8-1, structural parts 8-2, dynamic load loading platform 8-3, reinforcing rib 8-31, internal thread 8-32, force surface 8-33, rubber pad 9. Both the fixed platform 1 and the fixed test platfo...

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Abstract

The invention discloses a dynamic load shearing test device and method for an emergency disconnection self-sealing structure, belonging to the technical field of emergency disconnection testing. The device includes structural parts, base, dynamic load loading platform, fixed pulley, drop weight and rubber pad. The base is fixed and used to support the structure; the dynamic load loading platform is connected with the structure. The drop hammer is suspended directly above the force surface of the dynamic load loading platform through the steel wire rope and the fixed pulley. The test device of the present invention is simple in structure, easy to process, and easy to operate, and can realize the shearing test of structural parts under different impact loads. The mechanical behavior under energy supplements the gap in the study of dynamic load shearing test of emergency disconnection self-sealing structure, and is of great significance in further investigating whether the emergency disconnection self-sealing structure is qualified or not and further standardizing the use conditions of 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/303G01N3/02
CPCG01N3/02G01N3/303G01N2203/001G01N2203/0025G01N2203/0039G01N2203/0067
Inventor 周光明邓健任涛徐庆华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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