Super-large hanging vibration test fixture structure

Abstract

The invention relates to a super-large hanging vibration test fixture structure, belonging to the field of mechanical test fixtures; an integral frame structure is welded by profile steel and steel plates, and a test piece can be installed inside the integral frame structure; the front and the back of the integral frame structure are opened, a left upright post and a right upright post of the integral frame structure are welded by trapezoid rib plates and hollow steel, and the upper part of the integral frame structure is welded by cubical frames and three vertical rib plates; the integral frame structure can be fixed on the extended table top of a vibrating table by the left upright post and the right upright post; the extended table of the a testing table can drive the frame structure and the test piece to conduct vibration testing; the test piece can rotate for 360 degrees in the frame; and the fixture is an open structure and is characterized by small volume, light weight, good rigidity and higher resonant frequency.

Description

technical field [0001] The invention relates to a super-large suspended vibration test fixture structure, which belongs to the field of mechanical test fixtures. Background technique [0002] The function of the test fixture is to transmit the motion and energy of the vibrating table to the test piece. In the test, it is hoped that the moving coil will transmit the vibration energy to the test piece through the fixture without distortion. This requires the rigidity of the fixture to be as large as possible. Because when the fixture resonates, the input and output will no longer maintain the same value, and the motion parameters of each point on the fixture will not maintain the same value, which will affect the vibration test. [0003] The installation point of the test piece in the existing super-large suspended vibration test fixture structure is at the top, and the working state of the test piece is in the suspended state. For this type of test piece, the traditional fix...

AI Technical Summary

Problems solved by technology

Because when the fixture resonates, the input and output will no longer maintain the same value, and the motion parameters of each point on the fixture will not maintain the same value, which will affect the vibration test

[0003] The installation point of the test piece in the existing super-large suspended vibration test fixture structure is at the top, and the working state of the test piece is in the suspended state. For this type of test piece, the traditional fixture is a fully enclosed frame structure to ensure that the fixture required stiffness, such as figure 1 As shown, the structure is a cage-type truss structure. Due to the large size of the clamp, hollow steel pipes are generally used to reduce the weight, but a higher resonance frequency cannot be obtained. Because it is made of metal materials, it will generate multiple Harmonics, in order to reduce the peak value of multiple harmonics of the resonance frequency, thick-walled hollow steel pipes are required, which increases the weight and cost of the fixture

[0004] In addition, there are such fixtures made of aluminum alloy casting, such as figure 2 As shown, they all belong to the fully enclosed structure, and the cost is higher

[0005] Furthermore, due to the large volume and weight of the cage truss, and the rigidity is difficult to ensure, it is difficult to obtain a higher clamp resonance frequency

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