CN203348420U

CN203348420U - Buoyant raft vibration isolation system restrained by harmonic peak

Info

Publication number: CN203348420U
Application number: CN 201320351268
Authority: CN
Inventors: 翁泽宇; 王辉; 卢波; 丁红钢; 游红武
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2013-06-17
Filing date: 2013-06-17
Publication date: 2013-12-18
Anticipated expiration: 2023-06-17

Abstract

Disclosed is a buoyant raft vibration isolation system. The buoyant raft vibration isolation system comprises a unit and a raft body, wherein a first switch type damper is installed between the unit and the raft body, and a second switch type damper is installed between the unit and a foundation.

Description

The buoyant raft vibrating isolation system that resonance peak suppresses

Technical field

This patent relates to a kind of device for the vibration isolation of ship power unit.

Background technique

More and more pay attention to the vibration control of ship power unit in the modern ships Design and manufacture, especially, on military boats and ships and submarine, the most effectively technology is the buoyant raft vibration isolation technique at present.

The mechanical model that Fig. 1 is the buoyant raft vibrating isolation system, Fig. 1 medium power unit 11, powerplant module 12, powerplant module 13 are all topmost vibration sources, if will isolate preferably the vibration that powerplant module 1 passes to basis 5, can between unit and basis, set up raft body 3, each unit is bearing on raft body 3 by spring 2, and raft body 3 use springs 4 are bearing on basis.If the situation of only having a powerplant module only is discussed, can be reduced to Fig. 2 institute representation model.

In Fig. 1, the 1st, unit, wherein 11 represent that

unit

1,12 represents that

unit

2,13 represents that

unit

3,2 means spring,

spring

21,22,23-

supports unit

11,12,13,3 and represents the raft body, and 4 represent spring, and 5 represent basis.

Fig. 2 is the mechanical model of the buoyant raft vibrating isolation system after Fig. 1 is simplified, and 1 represents unit, and 2 represent spring, and 3 represent the raft body, and 4 represent spring, and 5 represent basis.

Fig. 3 is that in system shown in Figure 2, unit vibration is delivered to basic acceleration frequence responses curve after by the vibration isolation of buoyant raft vibrating isolation system, can find out, the buoyant raft vibrating isolation system has vibration isolating effect preferably.But on the acceleration frequence responses curve, there are obvious three resonance peaks to occur, especially the existence of the first two resonance peak, anti-vibration performance on the buoyant raft vibrating isolation system has totally unfavorable impact, in the certain limit of these two resonance peak respective frequencies, vibration isolating effect weakens greatly, What is more, not only sometimes in the certain limit of these two resonance peak respective frequencies, there is no vibration isolating effect, also can amplify vibration.

Summary of the invention

The utility model will overcome the above-mentioned shortcoming of prior art, provides a kind of resonance peak can realize suppressing most effectively, having the buoyant raft vibrating isolation system of vibration isolating effect preferably.

Buoyant raft vibrating isolation system described in the utility model, comprise unit and raft body, and one or more the first switching mode dampers are installed between unit and raft body, it is characterized in that: one or more second switch type dampers are installed between described unit and basis.

Meaned shown in Fig. 4 a switching mode damper is arranged between unit and raft body, a switching mode damper has been arranged between unit and basis.

When the powerplant module by vibration isolation operates in the resonance peak respective frequencies away from the buoyant raft vibrating isolation system, by set control strategy, closeall damper, allow all dampers inoperative, i.e. the undamped state;

When the powerplant module by vibration isolation runs in the certain limit of resonance peak respective frequencies of buoyant raft vibrating isolation system, by set control strategy, partly or entirely open these and be arranged on the damper of each link, allow part or all of damping work, thereby the resonance peak that effectively suppresses the buoyant raft vibrating isolation system, guarantee that, in this frequency range, the buoyant raft vibrating isolation system also has good anti-vibration performance.Variant resonance peak for the buoyant raft vibrating isolation system, relevant damper is had to different control (opening and closing and switching) strategy, make two links (link one: between the unit of buoyant raft vibrating isolation system and raft body at the buoyant raft vibrating isolation system, link two: between the unit and basis of buoyant raft vibrating isolation system) various damping configuration is arranged, thereby realize all can realizing suppressing most effectively to the resonance peak of this buoyant raft vibrating isolation system, make this buoyant raft vibrating isolation system there is more excellent vibration isolating effect in a wider frequency range.As shown in Figure 5

The utility model has the advantages that: for the main resonance peak of buoyant raft vibrating isolation system, by controlling (opening and closing and switching) relevant damper, make the relevant link at the buoyant raft vibrating isolation system that various damping configuration be arranged, thereby realize all can realizing suppressing most effectively to the main resonance peak of this buoyant raft vibrating isolation system, the buoyant raft vibrating isolation system that this resonance peak is suppressed has more excellent vibration isolating effect in a wider frequency range.As shown in Figure 5

The accompanying drawing explanation

Fig. 1 is the mechanical model of existing buoyant raft vibrating isolation system, and wherein 1 is unit, wherein 11 represents that

unit

1,12 represents that

unit

2,13 represents that

unit

3,2 means spring,

spring

21,22, and 23-

supports unit

The mechanical model of the buoyant raft vibrating isolation system after Fig. 2 simplifies Fig. 1,1 represents unit, and 2 represent spring, and 3 represent the raft body, and 4 represent spring, 5 represent basis.

Fig. 3 is that the unit vibration shown in Fig. 2 is delivered to basic acceleration frequence responses curve after by the vibration isolation of buoyant raft vibrating isolation system.

Fig. 4 is structural representation of the present utility model, has meaned a switching mode damper is arranged between unit and raft body, and a switching mode damper is arranged between unit and basis.

Fig. 5 is that the buoyant raft vibrating isolation system unit that the resonance peak of the present utility model shown in Fig. 4 suppresses is delivered to basic acceleration frequence responses curve

Embodiment

With reference to accompanying drawing 4,5:

Embodiment:

The buoyant raft vibrating isolation system figure that resonance peak of the present utility model suppresses is as Fig. 4, being about to the first switching mode damper is arranged between the unit and raft body of buoyant raft vibrating isolation system, again second switch type damper is arranged between the unit and basis of buoyant raft vibrating isolation system, the relevant parameters of system is in Table 1.

The buoyant raft vibrating isolation system embodiment relevant parameters that table 1 resonance peak suppresses

The buoyant raft vibrating isolation system unit that this resonance peak suppresses is delivered to basic acceleration frequence responses curve as shown in Figure 5.

This system is not when installing damper, being equivalent to switching mode damper 6 remains and closes and switching mode damper 7 remains that closing (is also that damper 6 and damper 7 are all inoperative, or its damping is zero), be common buoyant raft vibrating isolation system, this buoyant raft vibrating isolation system unit is delivered to basic acceleration frequence responses curve as shown in Figure 3.

Comparison diagram 5 and Fig. 3 are known, and the buoyant raft vibrating isolation system has realized that the anti-vibration performance of system significantly improves to the inhibition of first resonance peak and second resonance peak after adopting resonance peak inhibition technology.

The first switching mode damper and second switch type damper all can arrange one or more.

Claims

1. the buoyant raft vibrating isolation system, comprise unit and raft body, and the first switching mode damper is installed between unit and raft body, it is characterized in that: second switch type damper is installed between described unit and basis.

2. buoyant raft vibrating isolation system as claimed in claim 1, it is characterized in that: described the first switching mode damper and second switch type damper all can arrange one or more.