Piezoelectric Energy Harvesting Tuned Mass Absorber

A technology of tuning mass and piezoelectric energy capture, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., to achieve the effect of light weight, small size and simple structure

Active Publication Date: 2011-12-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solar energy and temperature difference energy supply technology are difficult to be widely used due to the limitation of natu

Method used

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  • Piezoelectric Energy Harvesting Tuned Mass Absorber
  • Piezoelectric Energy Harvesting Tuned Mass Absorber
  • Piezoelectric Energy Harvesting Tuned Mass Absorber

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example one

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

[0037] The damper 2 is arranged above the steel beam 1 and is hinged to the mass and the side wall of the bridge body respectively, and dissipates part of the vibrational 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 Shown is placed parallel to the steel beam 1 direction. For bridges with a trapezoidal cross-section and other inclined bridge side walls, the arrangement of the damper ...

Example Embodiment

[0045] Example two

[0046] Such as Picture 8 The suspension piezoelectric energy-capturing tuned mass shock absorber shown is composed of mass 11, steel frame 12, damper 13, steel beam 14, high-strength spring 15, I-shaped steel frame 16, piezoelectric material 17 and metal The board 18 and connecting pieces are composed. The left and right limbs of the I-shaped steel frame 16 are each fixed at the upper end to the lower bottom plate of the bridge 6 by anchor bolts arranged on the flange, and the lower end flange supports the steel beam 14. The I-shaped steel frame 16 is the only connection between the suspended PETMD and the bridge, and bears the gravity and vibration forces of the entire device. The steel beam 14 of the suspended TMD is fixed to the inner flange of the lower end of the I-shaped steel frame 16 by anchor bolts. The steel beam 14 and the high-strength spring 15 are consolidated by a connecting piece, and are hinged with the damper 13. The steel frame 12 is co...

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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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IPC IPC(8): E01D19/00E04B1/98H02N2/18
Inventor 潘鹏陈浩文
Owner TSINGHUA UNIV
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