Rotary Vibration Test Rig for Traveling Wave Vibration Testing of Composite Cylindrical Shells

A vibration test bench and vibration testing technology, which is applied in vibration testing, machine/structural component testing, measuring devices, etc., can solve problems such as failure to meet testing requirements, and achieve the goal of avoiding damage, reducing test errors, and stabilizing and effective clamping Effect

Active Publication Date: 2019-04-05
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for composite cylindrical shell structures, this full-field scanning laser vibration measurement cannot meet the test requirements.

Method used

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  • Rotary Vibration Test Rig for Traveling Wave Vibration Testing of Composite Cylindrical Shells
  • Rotary Vibration Test Rig for Traveling Wave Vibration Testing of Composite Cylindrical Shells
  • Rotary Vibration Test Rig for Traveling Wave Vibration Testing of Composite Cylindrical Shells

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings. figure 1 It is the front view of the rotary vibration test bench of the present invention; figure 2 It is a top view of the ejection excitation device of the rotary vibration test bench of the present invention; image 3 It is a top view of the laser circular scanning device of the rotary vibration test bench of the present invention; Figure 4 It is an axonometric view of the elastic excitation device of the present invention; Figure 5 It is the axonometric view of the rotational vibration test bench after the composite cylindrical shell is fixed in the present invention; Figure 6 It is a schematic diagram of the tie rod fixing device of the ejection excitation device of the present invention.

[0036] As shown in the figure, the rotary vibration test bench for the traveling wave vibration test of the composite cylindrical shell includes a remote transmission de...

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Abstract

The invention relates to the technical field of vibration test of composite structures, and provides a rotary vibration test bench for traveling wave vibration test of composite cylindrical shells. The rotary vibration test bench includes a remote driving device, a cylindrical shell clamping device, an ejection exciting device, a laser circular scanning device, and a laser interferometer. The laser circular scanning device and the laser interferometer are used together. By changing the laser light path, the vibration information of a cylindrical shell after vibration exciting can be collected. The laser circular scanning device can do axial feeding motion, and can rotate with a hollow shaft and a belt wheel, so as to collect vibration information of different points and different sections of a cylindrical shell. The device has the advantages of low cost, long service life and few test requirements, and is suitable for the majority of rotational vibration conditions for traveling wave vibration test of composite cylindrical shells. Measurement can be carried out multiple times to reduce test error.

Description

technical field [0001] The invention relates to the technical field of vibration testing of composite material structures, in particular to a rotary vibration test bench that can be used for testing the traveling wave vibration of a composite material cylindrical shell. Background technique [0002] Compared with metal cylindrical shells, composite cylindrical shells have the characteristics of light weight, corrosion resistance, and insulation, and are currently being used more and more in aerospace, shipbuilding, marine engineering, petrochemical, weapon manufacturing, and nuclear industries. field. Although the composite cylindrical shell has great strength and rigidity, the vibration problem is also very prominent. If it is externally excited during the rotation around its central axis, traveling wave vibration will occur. Especially thin-walled cylindrical shells will produce large-amplitude motions when they are strongly excited, which will make them more prone to dam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
CPCG01M7/02
Inventor 李晖原帅罗忠马辉刘杨赵帆
Owner NORTHEASTERN UNIV LIAONING
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