CN102052518A

CN102052518A - Tuned mass damper structure for reducing pipeline vibration

Info

Publication number: CN102052518A
Application number: CN2011100310288A
Authority: CN
Inventors: 曾胜; 程涛涛; 李宾; 任意; 金涛
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2011-01-28
Filing date: 2011-01-28
Publication date: 2011-05-11

Abstract

The invention discloses a tuned mass damper structure for reducing pipeline vibration. In the invention, an entire outer ring is in a dividable structure and is formed by combining two identical and symmetrical half outer rings by using two bolts; an entire inner ring is also in a dividable structure and is formed by combining two identical and symmetrical half inner rings by using another two bolts; a plurality of springs and dampers having the same number with the springs are circumferentially and symmetrically arranged between the entire outer ring and the entire inner ring, thus the supporting rigidities and the damping performances of the outer ring in all directions of the circumference are same; and the inner diameter of the entire inner ring is smaller than the outer diameter of a clamped damping pipeline. When the vibration of the traditional pipeline is needed to be reduced, the rigidity of the springs and the damping of the dampers are calculated as actually required, and then a manufactured tuned mass damper is fixed on the pipeline on the spot, thus a required damping effect can be obtained. The damper is in a dividable structure and has the advantages of simple structure, high reliability and easiness for realization.

Description

Reduce the tuned mass damper structure of pipe vibration

Technical field

The present invention relates to a kind of tuned mass damper structure, especially relate to a kind of tuned mass damper structure that reduces pipe vibration.

Background technique

Research to vibration system control has become one of focus of current engineering machinery research field.According to whether needs absorb energy from the external world, the control of vibration system is divided into ACTIVE CONTROL and Passive Control.Theoretically, ACTIVE CONTROL is better than Passive Control, but owing in theory with reason such as engineering physical condition restriction, the installation of ACTIVE CONTROL system in structure need be revised structural design and be difficult to carry out.Use maximum, the most ripe relatively still passive control system at present on the engineering.

The vibration control of pipe-line system also is that so there are many difficulties in pipe vibration ACTIVE CONTROL method in the enforcement of reality, and by contrast, vibration passive control has more the possibility of enforcement.Tend in the general Passive Control that pipeline is added support and increase damping and support stiffness.But for the pipeline of many ready-made vibrations, can't handle the underlying issue of support, promptly many occasions can't support on-the-spot directly the increasing of pipeline, even perhaps increase support, expense is also than higher.In order to address this problem, can adopt tuned mass damper to come pipeline is carried out vibration damping.

Tuned mass damper is a vibration system of being made up of spring, damper and mass block, and its theoretical research is very ripe.The general suspension of tuned mass damper structurally, the mechanism of structure being carried out vibration control is: when structure produces vibration under the incentive action outside, driving the tuned mass damper system vibrates together, the inertial force that the tuned mass damper system produces reacts on the structure, tuning this inertial force, make its vibration produce tunning effect, thereby reach the purpose that reduces the structural vibration reaction main structure.Because the tuned mass damper suspension structuress of utilizing the gravity characteristic that adopt, the vertical vibration that can be used for horizontal pipe suppresses more, but is difficult to be applied to the vibration suppression of the Vertical direction of the vibration of substantially horizontal of existing pipeline and vertical pipe.

Summary of the invention

The object of the present invention is to provide a kind of tuned mass damper structure that reduces pipe vibration, be a kind of simple, be easy to realize, reliability is high, the tuned mass damper structure of can fine reduction ready-made Analysis of Pipe Vibrations.

In order to reach above-mentioned purpose, the technical solution used in the present invention is:

The present invention includes whole outer shroud, whole interior ring, a plurality of spring and the damper identical with number springs; But whole outer shroud is the subdivision structure, synthesizes whole outer shroud by two half identical and symmetrical outer shrouds with two screws; But by whole interior ring also is the subdivision structure, synthesizes whole outer shroud by two half identical and symmetrical interior rings with two other screw; Whole outer shroud and whole in circumferential symmetry installation a plurality of springs and the damper identical between the ring with number springs, make the support stiffness of outer shroud and damping in circumferential isotropy.

The internal diameter of described whole interior ring is less than the external diameter that is held the vibration damping pipeline

Compare with the device of the ready-made pipe vibration of existing reduction, the invention has the advantages that:

1) adopted the subdivision structure, simple in structure, the reliability height is easy to realize;

2) when reducing ready-made Analysis of Pipe Vibrations, require to calculate the rigidity of required spring and the damping of damper according to reality, just can obtain the effectiveness in vibration suppression that needs on the pipeline at the scene of then tuned mass damper of making being fixed on;

3) applied widely.Need the piping of vibration damping for the scene, after can adopting finite element to carry out system optimization to calculate, in different oscillating points different tuned mass dampers is set and gets final product.

Description of drawings

Fig. 1 is the subdivision schematic representation of tuned mass damper.

Fig. 2 is installed to schematic representation behind the pipeline with tuned mass damper.

Fig. 3 is the example piping.

Fig. 4 is the response of the pipeline of no tuned mass damper.

Fig. 5 is the response that the pipeline of tuned mass damper is arranged.

Among the figure: 1, whole outer shroud, 2, whole in ring, 3, half outer shroud, ring in 4, screw, 5, half, 6, screw, 7, spring, 8, damper, 9, pipeline, 10, the example piping, 11, tuned mass damper.

Embodiment

The invention will be further described below in conjunction with drawings and Examples.

As shown in Figure 1 and Figure 2, the present invention includes whole outer shroud 1, whole in ring 2, a plurality of spring 7 and with spring 7 the same number of dampers 8; But whole outer shroud 1 is the subdivision structure, by two identical and symmetrical two screws of half outer shroud, 3 usefulness, 4 synthetic whole outer shrouds 1; But by ring 2 in whole also is the subdivision structure, by two other screw 6 synthetic whole outer shrouds 2 of two half identical and symmetrical interior ring 5 usefulness; Encircle the circumferentially symmetrical assembly parts that four springs and four dampers are installed between 2 at whole outer shroud 1 with in putting in order.Put in order outer shroud 1 and pass through many group springs 7 and the complete tuned mass dampers 11 of damper 8 compositions with whole interior ring 2.

The internal diameter of described whole interior ring 2 is less than the external diameter that is held vibration damping pipeline 9.Guarantee that whole interior ring 2 just can stably be fixed on the pipeline 9 as fixed block.The damping value of the rigidity value of spring 7 and damper 8 can obtain according to the tuned mass damper theoretical calculation of maturation.

Example piping 10 as shown in Figure 3 is an example, pipeline net weight 3kg between the strong point, and tuning target frequency is 16Hz, chooses spring rate 1514N/m.Get tuning quality 1/20, i.e. 0.15kg, the design tuned frequency is 16Hz, damping is 30N.s/m.The tuned mass damper 11 that designs is installed to example piping 10 backs just can plays damping effect, as shown in Figure 4, be the transient response of example piping 10 when the no tuned mass damper, and as shown in Figure 5, the transient response of example piping 10 when tuned mass damper is arranged.Very obvious, the transient response that has the example piping 10 among Fig. 5 of tuned mass damper is not faster with the piping of tuned mass damper to the attenuation ratio of vibration, and tuned mass damper has excellent vibration damping effect.

Claims

1. a tuned mass damper structure that reduces pipe vibration is characterized in that: comprise whole outer shroud, whole interior ring, a plurality of spring and the damper identical with number springs; But whole outer shroud is the subdivision structure, synthesizes whole outer shroud by two half identical and symmetrical outer shrouds with two screws; But by whole interior ring also is the subdivision structure, synthesizes whole outer shroud by two half identical and symmetrical interior rings with two other screw; Whole outer shroud and whole in circumferential symmetry installation a plurality of springs and the damper identical between the ring with number springs, make the support stiffness of outer shroud and damping in circumferential isotropy.

2. a kind of tuned mass damper structure that reduces pipe vibration according to claim 1 is characterized in that: the internal diameter of described whole interior ring is less than the external diameter that is held the vibration damping pipeline.