A Constrained Damping Layer Structure with Ribs

A technology of constrained damping and constrained layers, which is applied to building components, earthquake resistance, etc., can solve problems such as local bonding failure and reduce the vibration and noise reduction ability of the constrained damping layer, so as to reduce local deformation and improve the vibration and noise reduction ability , good paste effect

Active Publication Date: 2018-02-23
EAST CHINA JIAOTONG UNIVERSITY
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  • Abstract
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  • Application Information

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Problems solved by technology

For engineering structures bearing large loads, the length, width and thickness of the structural members themselves are relatively large, so the area and thickness of the applied constrained damping layer are also relatively large, then the local deformation of the constrained layer will lead to local bonding failure , thereby reducing the vibration and noise reduction capability of the constrained damping layer

Method used

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  • A Constrained Damping Layer Structure with Ribs
  • A Constrained Damping Layer Structure with Ribs
  • A Constrained Damping Layer Structure with Ribs

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Embodiment Construction

[0020] A restrained damping layer device with ribs is mainly used for vibration and noise control of thin-walled engineering structures. The constrained damping layer is composed of a damping layer 200, a constrained layer 300 and a constrained layer stiffener 310, see figure 2 . Among them, the damping layer 200 is made of high-damping viscoelastic material, and its damping loss factor should not be lower than 0.3 in the frequency range of vibration and noise control; the constrained layer 300 is made of aluminum (70 GPa), steel (200-210 GPa) or carbon fiber (≥210 GPa). The viscoelastic material in the damping layer 200 itself has a certain viscosity, and the damping layer 200 and the constraining layer 300 can be bonded in the factory to form a ribbed constrained damping layer device, and then pass the damping layer 200 and the structural layer on site. The paste between 100 realizes the installation of the ribbed constrained damping layer device, and if necessary, an adh...

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Abstract

The invention discloses a constrained damping layer structure with ribs, which is sequentially stacked with a structural layer, a damping layer and a constrained layer. The damping layer is made of high-damping viscoelastic material, and the bonding between the damping layer and the ribbed constraining layer forms a ribbed constrained damping layer device, which is installed by pasting the damping layer and the structural layer. The advantages of the present invention are: the proposed ribbed constrained damping layer structure increases the rigidity of the constrained layer, reduces the local deformation of the constrained layer during transportation and installation, and reduces the detachment between the constrained damping layer and the structural layer during installation. The void phenomenon can make the constrained damping layer and the structural layer have a good paste effect, and can also increase the shear deformation of the damping layer, thereby improving its vibration and noise reduction capabilities.

Description

technical field [0001] The invention relates to the technical field of structural vibration control, in particular to a constrained damping layer structure for suppressing vibration and noise of steel beams. Background technique [0002] Civil engineering structures vibrate under dynamic loads (wind, vehicles, pedestrians, etc.). Excessive vibration will not only affect the normal use of the structure, but will even cause noise pollution to the surrounding environment. The vibration generated by the steel structure under dynamic action is greater than that of the concrete structure, and the thickness of the steel plate used in the civil engineering structure is mostly 5-50 mm, and the ability of the steel plate to radiate noise is the strongest in this thickness range. The constrained damping layer dissipates the vibration energy through the shear deformation of the damping layer, and can effectively suppress the vibration and noise generated by the steel structure in a wid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/98
CPCE04B1/98
Inventor 刘全民刘林芽冯青松
Owner EAST CHINA JIAOTONG UNIVERSITY
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