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Shearing type large size material damping testing device

A testing device and material damping technology, applied in measurement devices, analytical materials, material inspection products, etc., can solve the problem of inability to test the shear damping characteristics of large-sized materials, break through the bottleneck that the damping characteristics cannot be accurately measured, and improve the displacement The effect of measurement accuracy and simple device structure

Inactive Publication Date: 2008-10-01
刘铁军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a shear type large-scale material damping test device to solve the current problem that the shear damping characteristics of large-scale materials for civil engineering cannot be tested

Method used

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  • Shearing type large size material damping testing device
  • Shearing type large size material damping testing device
  • Shearing type large size material damping testing device

Examples

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specific Embodiment approach 1

[0007] Specific embodiment one: illustrate this embodiment in conjunction with Fig. 1, the damping test device of this embodiment is made up of excitation system, measurement system, loading head 10, fixing kit 21 and base 14; Described excitation system is made up of signal generator 1, power An amplifier 2 and an electromagnetic exciter 3 are formed, and the measurement system is composed of a piezoelectric force sensor 5, a laser displacement sensor 7, a charge amplifier 6, a voltage amplifier 8, and a computer data collector 9. The piezoelectric force sensor 5 The two input ends of the electromagnetic exciter 3 and the lower end surface of the loading head 10 are respectively connected to realize the data acquisition of the tension pressure, and the output end of the piezoelectric force sensor 5 is connected to the input end of the charge amplifier 6, so Directly above the electromagnetic exciter 3 is provided with a laser displacement sensor 7, the output end of the laser ...

specific Embodiment approach 2

[0011] Specific Embodiment 2: This embodiment is described with reference to FIGS. 1 to 3 . The loading head 10 of this embodiment is composed of a first upper beam 11 , a second lower beam 12 , and two first connectors 13 ; the first upper The beam 11 is arranged on the first lower beam 12, the two ends of the first upper beam 11 and the first lower beam 12 are respectively connected by a first connecting piece 13, the lower end surface of the first lower beam 12 is provided with a groove 26, The upper end of the piezoelectric force sensor 5 is installed in the groove 26 of the lower end surface of the first lower beam 12, and the first connecting piece 13 is composed of a screw rod 30 and a nut 31; the big end of the screw rod 30 is installed at the second In the shoulder holes 32 of the lower end faces of the two lower beams 12. Such an arrangement facilitates the installation of the force sensor 5 and the first lower beam 12 . Other components and connections are the same...

specific Embodiment approach 3

[0012] Specific embodiment three: in conjunction with Fig. 1, Figure 4 , Figure 5 To illustrate this embodiment, the fixing kit 21 of this embodiment is composed of a second upper beam 22, a second lower beam 23, two second connectors 24, and two third connectors 25; the second upper beam 22 is set On the second lower beam 23, the two ends of the second upper beam 22 and the second lower beam 23 are respectively connected by a second connecting piece 24, and the second lower beam 23 is arranged on the base 14, and the second lower beam 23 The two ends of the base 14 are respectively connected by a third connecting piece 25 . Such setting can facilitate the adjustment of the height of the member 4 to be measured. Other components and connections are the same as those in the first embodiment.

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Abstract

A shearing large-size material damping testing device relates to a device for testing damping property of large-size material used in civil engineering, the invention is aimed to resolve the problem that shear damping characteristic of large-size materials used in the civil engineering can not be tested. The two input ends of a piezoelectric force sensor (5) are connected with the output ends of a load head(10) and a electromagnetic vibration exciter (3).The top of the electromagnetic vibration exciter (3) is provided with a laser displacement sensor (7 ).The output end of the piezoelectric force sensor (5) is connected with the input end of a charge amplifier (6).The two input ends of a voltage amplifier (8) are connected with the output ends of the laser displacement sensor (7)and the charge amplifier (6) .The two output ends of the voltage amplifier (8) are connected with the two input ends of a computer data collector (9) .The input end of the electromagnetic vibration exciter(3) is connected with a signal generator ( 1) through a power amplifier (2) . A base (14) is connected with a fixed external member (21). The present invention can test the damping property and the elastic modulus of large-sized materials under shearing effect.

Description

technical field [0001] The invention relates to a test device for the damping performance of large-scale materials used in civil engineering. Background technique [0002] At present, the testing of the damping characteristics of viscoelastic damping materials is mainly done by instruments such as dynamic mechanical analyzers and viscoelastic spectrometers. The objects tested by these devices are mainly materials such as metals, plastics, and polymers. , composite materials), these devices cannot be measured due to the limitation of the size of the specimen. Accurate grasp of the dynamic characteristics of civil engineering materials is of great significance for the accurate analysis of structural vibration response. Therefore, it is imperative to develop damping test devices suitable for large-scale materials It must be done, and the existing damping tests mainly focus on components mainly subject to bending, such as simply supported beams and cantilever beams, but there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/00G01N33/38
Inventor 刘铁军崔闯梁超锋
Owner 刘铁军
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