An underwater intelligent double-layer shell structure with vibration reduction function

Abstract

The invention discloses an underwater intelligent double-layer shell structure with a vibration-reducing function, and relates to the field of underwater vehicles. The pressure-resistant shell and the light shell are connected into one body through solid ribs, and the two ends of the pressure-resistant shell are connected and sealed. The end cover, the piezoelectric sensor is installed on the inner surface of the light shell, the piezoelectric actuator is installed on the outer surface of the light shell, the piezoelectric sensor, the charge amplifier, the data acquisition module, the active controller and the piezoelectric actuator power amplifier are installed on the Inside the pressure-resistant shell, the piezoelectric sensor monitors the vibration signal of the light shell and transmits it to the charge amplifier. The charge amplifier is connected to the data acquisition module, and the data acquisition module processes the signal and transmits it to the active controller. The piezoelectric actuator is controlled by the power amplifier of the actuator, which can effectively suppress the underwater low-frequency vibration and sound radiation. Compared with the vibration and noise reduction method of the transmission, the active control of vibration and noise has the effect of suppressing low-frequency and wide-band, and has a great impact on the physical properties of the controlled structure. Small impact.

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...

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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.

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