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Improvement method and device based on conventional ship vibration isolation system

A vibration isolation system and ship technology, applied in non-rotational vibration suppression and other directions, can solve the problems of poor fit, bulky, unclear response characteristics and stability, etc.

Active Publication Date: 2015-12-02
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing nonlinear vibration isolators are vibration isolators with integrated positive and negative stiffness, which are relatively bulky, and the response characteristics and stability to the swing, tilt and impact input conditions on the boat are still unclear. poor suitability

Method used

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  • Improvement method and device based on conventional ship vibration isolation system
  • Improvement method and device based on conventional ship vibration isolation system
  • Improvement method and device based on conventional ship vibration isolation system

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Embodiment 1

[0039] refer to Figure 1-3 , the present invention provides an improved device based on the existing ship vibration isolation system, which is improved on the basis of the original ship vibration isolation system to reduce the natural frequency of the vibration isolation system, improve the vibration isolation effect, reduce Vibration transmission, improve the role of acoustic invisibility. The vibration isolation system system includes a vibration-isolated equipment rack 2 and a base, wherein the base adopts an elastic base 5, and the vibration-isolated equipment rack 2 is equipped with the vibration-isolated equipment 1, the vibration-isolated equipment rack 2 and the vibration-isolated equipment rack 2. Several shock absorbers 4 are also arranged between the elastic bases 5 . Wherein, the specific structural form of the shock absorber 4 can be selected according to specific conditions, and is not limited here; the distribution form of the shock absorber 4 can be according...

Embodiment 2

[0059] refer to Figure 4-5 , this embodiment is a transformation embodiment based on the first embodiment. In this embodiment, the negative stiffness adjustment mechanism adopts a vertically arranged Euler buckling beam, and the structure of the remaining parts can refer to the relevant description of the first embodiment. There are no restrictions.

[0060] In this embodiment, one end of the Euler buckling beam 3 is installed to the bottom surface of the vibration-isolated equipment frame 2 through the frame connection structure 3a, and the specific frame installation mechanism 3a is fixedly installed on the bottom surface of the vibration-isolated equipment frame 2 Above, the Euler buckling beam 3 is connected to the frame mounting structure 3a; the other end of the Euler buckling beam is installed on the upper surface of the elastic base 5 through the base connecting structure 3d, and the specific base connecting structure 3d is fixedly installed on the elastic base On th...

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Abstract

The invention provides an improvement device based on a conventional ship vibration isolation system. The improvement device comprises a vibration-isolated equipment machine frame and an elastic base, wherein a plurality of damping devices are arranged between the vibration-isolated equipment machine frame and the elastic base; a plurality of independent Euler buckled beams, which are arranged in the vertical direction or the horizontal direction, are connected in parallel between the vibration-isolated equipment machine frame and the elastic base. The invention also provides an improvement method based on the conventional ship vibration isolation system. The improvement method comprises the following steps of determining the negative stiffness needed by the Euler buckled beams according to the inherent frequency of the conventional ship vibration isolation system and an improved target frequency, and determining geometrical parameters and initial compression amounts of the Euler buckled beams through combination with stiffness formulas of the Euler buckled beams and mounting space on a ship; and mounting the selected Euler buckled beams between the vibration-isolated equipment machine frame and the elastic base. On the basis of not changing the conventional ship vibration isolation system, the inherent frequency of the conventional ship vibration isolation system is reduced, the vibration isolation effect is improved, the vibration transmission speed is reduced, and the sound stealth performance is improved.

Description

technical field [0001] The invention relates to the technical field of vibration damping device design, in particular to an improved method and device based on the existing ship vibration isolation system. Background technique [0002] As the navy's killer weapon and active strategic weapon platform, ships undertake the tasks of defending the country's maritime and homeland security, maintaining and safeguarding maritime rights and interests, and are also key targets for enemy defense and strikes. Therefore, having better acoustic invisibility has important military significance for reducing the probability of ships being discovered. When sailing at low speed, the radiation noise of the submarine is mainly caused by the excitation generated by the mechanical operation of its main and auxiliary equipment, which is transmitted to the hull, causing the hull to vibrate and then radiate underwater. At present, the main control method for vibration transmission of power equipment...

Claims

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Application Information

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IPC IPC(8): F16F15/04F16F15/02
Inventor 黄修长华宏星任龙龙徐时吟
Owner SHANGHAI JIAO TONG UNIV
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