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Underwater intelligent double-layer shell structure with vibration reduction function

A double-layer shell, intelligent technology, applied in spring/shock absorber, vibration suppression adjustment, non-rotation vibration suppression, etc., can solve the problems of long wavelength of sound wave and long transmission distance.

Active Publication Date: 2020-10-23
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, both methods have certain defects: the effect of suppressing high-frequency vibration is more obvious, but because the outer shell is a light shell, the thickness of the light shell is thinner than that of the pressure shell, and the light shell is easier to transmit the low-frequency vibration of the mechanical structure in the cabin The low-frequency acoustic radiation caused by low-frequency acoustic radiation has a long wavelength and a long transmission distance, so it is easier to be detected by sonar. Therefore, low-frequency vibration becomes the main cause of acoustic radiation from underwater vehicles.

Method used

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  • Underwater intelligent double-layer shell structure with vibration reduction function
  • Underwater intelligent double-layer shell structure with vibration reduction function
  • Underwater intelligent double-layer shell structure with vibration reduction function

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Embodiment Construction

[0019] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 with 2 Shown is an underwater intelligent double-layer shell structure with vibration reduction function, which includes an internal pressure shell 1 and an external light shell 2. The outer surface of the pressure shell 1 and the inner surface of the light shell 2 pass through solid ribs The plates 3 are connected into one structure, and the two ends of the pressure shell 1 are equipped with sealing end caps 4, which are used to realize the sealing structure of the pressure shell 1, so that the pressure shell 1 forms a watertight structure. The light shell 2 is a water-permeable structure, and a water cavity 5 is formed between the pressure shell 1 and the light shell 2. The water cavity 5 is formed by at least two solid ribs 3 at intervals. By storing water in the water cavity 5, it can be used for underwater navig...

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Abstract

The invention discloses an underwater intelligent double-layer shell structure with a vibration reduction function, which relates to the field of underwater vehicles. A pressure-resistant shell and alight shell are connected into a whole through the solid rib plate; two ends of the pressure-resistant shell are connected with sealing end covers; a piezoelectric sensor is mounted on the inner surface of the light shell; a piezoelectric actuator is mounted on the outer surface of the light shell; the piezoelectric sensor, a charge amplifier, a data acquisition module, an active controller and the piezoelectric actuator power amplifier are mounted in the pressure-resistant shell; the piezoelectric sensor monitors a vibration signal of the light shell and transmits the vibration signal to thecharge amplifier; the charge amplifier is connected to the data acquisition module; the data acquisition module processes signals and transmits the signals to the active controller, the active controller controls the piezoelectric actuator through the piezoelectric actuator power amplifier, and underwater low-frequency vibration and sound radiation can be effectively restrained. Compared with a vibration reduction and noise reduction method for transmission, active control of vibration and noise has the advantages that the effect of restraining low frequency and broadband is achieved, and theinfluence on the physical property of a controlled structure is small.

Description

technical field [0001] The invention relates to the field of underwater vehicles, in particular to an underwater intelligent double-layer shell structure with a damping function. Background technique [0002] my country's underwater vehicles generally adopt a double-layer shell structure. The double-layer shell structure includes a pressure-resistant shell on the inside and a light shell on the outside. Compared with the single-layer shell structure, the double-layer shell structure can better protect The inner shell is not damaged, and the water storage between the single layer and the double layer can provide a large reserve buoyancy, and at the same time, it can also inhibit the medium and high frequency sound radiation to a certain extent. The main transmission path of mechanical noise of underwater vehicles based on the double-layer hull structure is: cabin-pressure hull-inter-board-light shell, so directly controlling the sound radiation caused by the vibration of the l...

Claims

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Application Information

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IPC IPC(8): B63B3/13F16F15/02
CPCB63B3/13F16F15/002F16F15/007F16F15/02
Inventor 安方张万良段勇苏明珠吴江海白振国
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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