Device of ultralow frequency test in horizontal direction

A modal test, horizontal direction technology, applied in the direction of measuring device, machine/structural component test, vibration test, etc., can solve problems that cannot be eliminated, and achieve the effect of no tracheal disturbance, valid test data, and continuous air supply

Inactive Publication Date: 2015-03-25
嘉兴卉景园林有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency that the existing technology cannot eliminate the influence of the free-free boundary constraint conditions in the horizontal direction on the modal test, the present invention provides a plane motion that is basically unconstrained, has no friction and inertial force influence, and does not produce additional force influence. Ultra-low frequency modal test device in the horizontal direction

Method used

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  • Device of ultralow frequency test in horizontal direction
  • Device of ultralow frequency test in horizontal direction
  • Device of ultralow frequency test in horizontal direction

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] refer to Figure 1 ~ Figure 3 , an ultra-low frequency modal test device in the horizontal direction, comprising an air flotation plate 1, an air flotation pad 2, an air flotation frame 4, an end cover 6, a bottom cover 8, a fixed end 14 of a pull rope, a pull rope 9, and an air pipe 10 And 12. The frictionless rotating air supply device 15 , wherein the frictionless rotating air supply device 15 includes an air bearing shaft 19 , an air bearing sleeve 20 and a base 18 . The air float frame 4 is cross-shaped, the air float pad 2 is installed on the four corners of the air float frame 4, the air float pad 2 is placed on the air float plate 1, the center of the air float frame 4 and There are air storage chambers 7 and 3 at the four corners, and the end cover 6 is installed on the upper end of the air storage chamber 7 in the center of the air flotation frame. T...

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Abstract

Provided is a device of an ultralow frequency test in a horizontal direction. A flotation frame is in a cross shape. A flotation cushion is installed on each of four corners of the flotation frame and placed on a flotation flat board. Gas storage cavities are respectively formed in the center and the four corners of the flotation frame. An end cover is installed at the upper end of a gas storage in the center of the flotation frame and communicated with the gas storage cavities in the four corners of the flotation frame. A bottom cover is installed at the bottom end of the gas storage cavity in the center of the flotation frame. A round through hole is formed in the center of the flotation flat board. A fixed end of a pull rope is installed on a hanging point of a solar cell panel, and the pull rope penetrates through two ends of the through hole in the center of the flotation flat board and is connected with the bottom cover and the fixed end of the pull rope. According to the device of the ultralow frequency test in the horizontal direction, plane motion is basically unconfined, and free of effects of friction, inertia force and additional force.

Description

technical field [0001] The invention relates to an ultra-low frequency modal test device. Background technique [0002] With the rapid development of aerospace technology, the demand for low-frequency and ultra-low frequency modal test analysis is increasing. In order to have accurate modal parameters for reference in the design of the spacecraft to avoid unnecessary errors such as resonance, it is necessary to conduct modal analysis tests on the spacecraft. The modal analysis test tests the dynamic characteristics, natural frequency, mode shape and damping, generalized mass, generalized stiffness, etc. [0003] Weightlessness is a main feature of the space environment. For modal tests in the vertical direction, it is a generally accepted principle that the rigid body motion frequency in the vertical direction of the suspension device should be an order of magnitude lower than the fundamental frequency of the specimen. At present, the model of the modal test suspension sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
Inventor 单晓杭孙建辉周海清
Owner 嘉兴卉景园林有限公司
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