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Piezoelectric energy-capturing type tuning quality shock absorber

A technology of tuning quality and piezoelectric energy harvesting, applied to piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., to achieve the effects of vibration suppression, small size, and convenient production

Active Publication Date: 2014-03-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solar energy and temperature difference energy supply technology are difficult to be widely used due to the limitation of natural conditions, but the vibration energy in the working environment is not only ubiquitous, but also has a high energy density

Method used

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  • Piezoelectric energy-capturing type tuning quality shock absorber
  • Piezoelectric energy-capturing type tuning quality shock absorber
  • Piezoelectric energy-capturing type tuning quality shock absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1 to Figure 4 The cantilever piezoelectric energy-harvesting tuned mass damper shown is composed of a steel beam 1, a damper 2, a mass 3, a piezoelectric material 4, a metal plate 5, a connector 7 and an energy harvesting and storage circuit. The steel girder 1 can be shaped steel, and is connected to the side wall 6 of the bridge through a connecting piece 7 . The mass block 3 is made of concrete, which is cast-in-place at the far end of the steel beam 1 .

[0037] The damper 2 is arranged above the steel girder 1, and is respectively hinged with the mass block and the side wall of the bridge body, and dissipates part of the vibration mechanical energy when the bridge body and the mass block move relative to each other. The arrangement of the damper 2 can be as figure 1 Placed parallel to the direction of steel beam 1 as shown. For bridges with inclined side walls such as trapezoidal cross-sections, the arrangement of the damper 2 can also be as foll...

Embodiment 2

[0046] Such as Figure 8 The shown suspended piezoelectric energy-harvesting tuned mass damper consists of a mass block 11, a steel frame 12, a damper 13, a steel beam 14, a high-strength spring 15, an I-shaped steel frame 16, piezoelectric materials 17 and metal Board 18 and connectors. The left and right sides of the I-shaped steel frame 16 are fixed on the lower floor of the bridge 6 through the anchor bolts arranged on the flange, and the steel beam 14 is supported by the flange at the lower end. The I-shaped steel frame 16 is the only connection between the suspended PETMD and the bridge, and bears the gravity and vibration force of the whole device. The steel beam 14 of the suspended TMD is fixed to the lower inner flange of the I-shaped steel frame 16 through anchor bolts. Steel beams 14 and high-strength springs 15 are consolidated through connectors, and are hinged with dampers 13 . The steel frame 12 is made up of the base plate and surrounding walls, which is con...

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Abstract

The invention discloses a piezoelectric energy-capturing type tuning quality shock absorber belonging to the technical field of civil engineering structures. The piezoelectric energy-capturing type tuning quality shock absorber is characterized by being symmetrically arranged at two sides of a bridge along the length direction of the bridge and comprising a girder connected with the side wall of the bridge and a mass block, wherein a damper is arranged above the girder, and piezoelectric vibrators are arranged on the downside of the girder in a cling manner and comprise single chips, parallel connection bimorphs and serial connection bimorphs. The piezoelectric energy-capturing type tuning quality shock absorber is also characterized by being arranged right below the bridge along the length direction of the bridge and comprising an I-shaped steel frame fixed at the lower end of a bottom plate of the bridge, wherein the wing edge of the lower end of the bottom plate of the bridge is used for supporting the girder, a high-strength spring and a hinging damper are fixed at the upper part of the girder; and a steel frame is connected to upsides of the high-strength spring and the hinging damper, the mass block is placed on the steel frame, and the piezoelectric vibrators are placed between the mass block and the steel frame. The invention has the advantages of reasonable and novel structure, easiness in machining, flexibility and convenience for use, strong applicability, capabilities of effectively improving shock resistance property of the bridge structure and saving energy resources, wide application prospect and popularization value.

Description

technical field [0001] The piezoelectric energy-harvesting tuned mass damper (Piezoelectric Energy-harvesting Tuned Mass Damper, PETMD) belongs to the technical field of civil engineering structure vibration reduction, and specifically relates to a kind of energy harvesting device installed on the beam and plate members of the bridge in bridge engineering. Components, especially a novel tuned mass damper with piezoelectric energy-harvesting properties. Background technique [0002] Bridges are large, complex structures. Its static and dynamic characteristics, including space internal force calculation, stability, vibration, wind and earthquake response, etc., will bring great harm if not solved properly in the design of the bridge. In recent years, bridge vibration problems have attracted much attention: such as excessive vibration caused by train speed increase on the basis of existing railway bridges, urban noise pollution caused by vibration of urban track viaducts, wind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/00E04B1/98H02N2/18
Inventor 潘鹏陈浩文
Owner TSINGHUA UNIV
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