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Single-span beam vibration experiment system

An experimental system, single-span beam technology, applied in the field of single-span beam random vibration experimental system

Pending Publication Date: 2019-06-28
TIANJIN UNIV
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Problems solved by technology

[0006] The beneficial effect of this mechanism is: the test piece beam adopted by the multifunctional single-span beam vibration experiment system of the present invention is the actual beam model to carry out the vibration test, which effectively solves the problem that the traditional beam vibration experiment instrument simplifies the test piece beam to the mass on the string The defect that the blocks do not match the actual model

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Embodiment Construction

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

[0014] As shown in the accompanying drawings, the single-span beam vibration experiment system of the present invention includes a rectangular base, and a plurality of mounting holes are opened on the vertical plate 1 of the rectangular base, and the base of the exciter 6 passes through the The bolts in the mounting holes of the set positions are fixedly connected with the vertical plate 1 . The loading of different positions of the specimen beam can be realized by changing the position where the vibrator 6 is installed on the vertical plate 1 . The vibration exciter preferably adopts a powerful electrodynamic modal vibration exciter, which can provide excitation for the beam with a maximum excitation force of 100 N and a maximum amplitude of 10 mm.

[0015] On the left and right sides of the horizontal plate 2 of the rectangular base, a beam support 3 is respectively inst...

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Abstract

The invention discloses a single-span beam vibration experiment system. The whole single-span beam vibration experiment system consists of eight parts: a right-angle pedestal, a beam support, a strongelectric modal exciter, a laser displacement sensor, a dynamic force sensor, a digital signal generator, a dynamic and static strain data acquisition system and a computer; a plurality of mounting holes are formed in a vertical plate of the right-angle pedestal; the supports comprise a singly supported end support and a fixed end support; an excitation signal is output by the computer, and excitation is provided for a test piece beam through a signal generator, a linear power amplifier and the exciter; and the displacement sensor and the dynamic force sensor are sequentially connected with the dynamic and static strain data acquisition system and the computer to obtain a test piece beam vibration response time course curve. The single-span beam vibration experiment system can complete a multi-form vibration experiment, an inherent frequency experiment and a complex random vibration experiment of a single-span beam by changing the restrained end form of the beam, the position of the exciter and the type of an excitation signal.

Description

technical field [0001] The invention relates to a single-span beam vibration experiment system, in particular to a single-span beam random vibration experiment system. Background technique [0002] Most of the existing beam vibration experimental systems simplify the beam of the specimen, and simplify the mass to several mass points concentrated on the string, that is, to simulate the mode shape of the beam by exciting the mass point to drive the string to vibrate. For example, the WS-5923 vibration comprehensive teaching instrument, which is often used in vibration practice teaching, uses electromagnetic excitation to cause the mass to drive the string to vibrate, thereby simulating different vibration modes. There is a defect in this way of driving the vibration of the string through the mass block, which simplifies the beam to a few particle points on the string and is far from the actual beam. Another example is when using the traditional hammering method to measure the...

Claims

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Application Information

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IPC IPC(8): G01M7/02
Inventor 朱海涛李显昌罗云标张梁
Owner TIANJIN UNIV
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