A double-inerter parallel fourth-order vibration damping structure

A vibration-damping structure and parallel technology, applied in building components, protective buildings/shelters, and anti-vibration, etc., can solve the problems of limited vibration damping effect of fans, large volume mass, and excessive occupation of the interior space of the engine room, etc. , to achieve the effect of improving the time domain response

Active Publication Date: 2022-03-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional TMD device is limited to the simple combination of spring, damper and mass block, which has great limitations on the vibration reduction effect of the fan, and its own volume and mass block are too large, thus occupying too much space inside the engine room and affecting the wind turbine. There is a certain burden on the structure

Method used

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  • A double-inerter parallel fourth-order vibration damping structure
  • A double-inerter parallel fourth-order vibration damping structure
  • A double-inerter parallel fourth-order vibration damping structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The first-stage, second-order damping structure 1 includes: a first-stage spring k1, a first-stage inertia b1, and a first-stage damping c1; and the spring k1, inertia b1, and The damping c1 is connected in series;

[0024] The second-stage, second-order damping structure 2 includes: a second-stage spring k2, a second-stage inertia b2, and a second-stage damping c2; and the spring k2 and damping c2 of the second-stage, second-order damping structure 2 After parallel connection, it is connected in series with inertial capacity b2.

Embodiment 2

[0026] The first-stage, second-order damping structure 1 includes: a first-stage spring k1, a first-stage inertia b1, and a first-stage damping c1; and the spring k1, inertia b1, and The damping c1 is connected in series;

[0027] The second-stage, second-order damping structure 2 includes: a second-stage spring k2, a second-stage inertia b2, and a second-stage damping c2; and the spring k2, inertia b2 and damping c2 are connected in series.

Embodiment 3

[0029] The first-stage second-order damping structure 1 includes: a first-stage spring k1, a first-stage inertia b1, and a first-stage damping c1; and the spring k1 of the first-stage second-order damping structure 1 is connected in parallel with the damping c1 Afterwards, it is connected in series with the inertial capacity b1;

[0030] The second-stage, second-order damping structure 2 includes: a second-stage spring k2, a second-stage inertia b2, and a second-stage damping c2; and the spring k2 and the damping c2 of the second-stage, second-order damping structure 2 are connected in parallel Afterwards, it is connected in series with the inertial capacity b2.

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PUM

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Abstract

The invention discloses a double-inertia parallel fourth-order vibration damping structure, which includes a two-stage second-order vibration damping structure. First-order damping structure; the first-order second-order damping structure and the second-order second-order damping structure both include springs, inertial capacity, and damping, and are all in the series or series-parallel integrated form of "spring-damping-inertler"; The upper and lower endpoints of the first-stage second-order vibration-damping structure are respectively connected to the upper and lower endpoints of the second-stage second-order vibration-damping structure to form a double-inertia parallel fourth-order vibration-damping structure. The invention can effectively improve the damping ratio and vibration reduction effect of the fan system.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction of offshore wind turbines, in particular to a double-inerter parallel fourth-order vibration reduction structure. Background technique [0002] With the gradual increase in the power of a single unit of offshore wind turbines, the quality of the nacelle, impellers, floating platforms, and the height of the tower continue to increase. Because the tower made of flexible materials can greatly reduce the weight of the tower when the height is high, reduce the production cost of the tower, and improve the economic applicability of the wind turbine, so the flexible tower is widely used in large offshore wind turbines. However, the material properties of the flexible tower itself determine that the tower amplitude and platform pitch angle increase under the external wind and wave load conditions of the offshore wind turbine, which affects the reliability of the wind turbine and threatens the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/98E04H9/14B63B35/44F03D80/80
CPCE04H9/14B63B35/44F03D80/88B63B2035/446Y02E10/72
Inventor 陈志强赵爱港
Owner NANJING UNIV OF SCI & TECH
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