CN-121973920-A - Vibration isolation and noise reduction structure for acoustic detection matrix of deepwater aircraft

CN121973920ACN 121973920 ACN121973920 ACN 121973920ACN-121973920-A

Abstract

The invention discloses a vibration isolation and noise reduction structure for a sound detection matrix of a deepwater aircraft, which comprises a primary vibration isolation structure arranged between a matrix supporting seat and an inner cylinder body, wherein the primary vibration isolation structure is a vibration isolation and noise reduction main body structure which is mainly formed by alternately laminating a resin plate layer and a composite rubber layer, a positioning isolation rubber mat is arranged at the bottom of the vibration isolation and noise reduction main body structure, and mass blocks uniformly distributed along the circumference are embedded in the composite rubber layer to form a local resonance design composite structure. The invention can realize the isolation of noise generated in the navigation of the aircraft so as to effectively reduce the influence of the noise on the matrix.

Inventors

ZHAO YONGCHENG
HAO CHENGPENG
LIAO LIMING
LI HAILIANG
CHANG WENJUAN

Assignees

中国科学院声学研究所

Dates

Publication Date: 20260505
Application Date: 20260316

Claims (6)

1. The vibration isolation and noise reduction structure for the acoustic detection matrix of the deepwater aircraft is characterized by comprising a primary vibration isolation structure arranged between a matrix supporting seat and an inner cylinder body, wherein the primary vibration isolation structure is a vibration isolation and noise reduction main body structure; The vibration isolation noise reduction main body structure is mainly formed by alternately laminating a resin plate layer and a composite rubber layer, wherein a positioning isolation rubber pad is arranged at the bottom of the vibration isolation noise reduction main body structure, and mass blocks uniformly distributed along the circumference are embedded in the composite rubber layer to form a local resonance design composite structure.
2. The vibration isolation and noise reduction structure according to claim 1, wherein the mass is cylindrical or cylindrical.
3. The vibration and noise reduction structure according to claim 1, wherein the mass is provided with a plurality of rings, and the rings are spaced apart by a certain distance.
4. The vibration and noise reduction structure according to claim 1, further comprising a secondary vibration isolation structure arranged between the inner cylinder and the outer shell of the acoustic detection matrix, wherein the secondary vibration isolation structure comprises a composite rubber flat pad and a sealing ring; the composite rubber flat pad is arranged on a fixing piece between the inner cylinder body and the outer shell body, and the sealing ring is arranged in a sealing groove on the outer side face of the inner cylinder body.
5. The vibration and noise isolation structure according to claim 1, wherein the composite rubber flat pad is a three-layer sandwich structure in which a resin plate is sandwiched between rubber.
6. The vibration and noise reduction structure according to claim 1, further comprising a vibration isolation rubber disposed between the matrix and the matrix support base.

Description

Vibration isolation and noise reduction structure for acoustic detection matrix of deepwater aircraft Technical Field The invention belongs to the technical field of unmanned underwater vehicles and acoustic detection engineering, and particularly relates to a vibration isolation and noise reduction structure for an acoustic detection matrix of a deepwater vehicle. Background The acoustic detection matrix is equivalent to the auricular of an unmanned underwater vehicle (UUV for short) under water, the performance of the acoustic detection matrix is important to the information such as the position and the navigational speed of a target relative to the vehicle, and the accurate control of the movement track of the vehicle is more relevant. The performance of the acoustic detection matrix is not only determined by the parameters of the transducer of each array element, but also by the signal to noise ratio of the matrix itself, and one factor affecting the signal to noise ratio of the acoustic detection matrix is vibration noise generated when the aircraft sails, and the noise is directly transmitted and coupled to the acoustic detection matrix through the shell, so that the performance of the acoustic detection matrix is seriously affected. Studies have shown a 6dB reduction in noise level and a 50% increase in range under good hydrologic conditions. Therefore, the vibration isolation and noise reduction technology becomes one of important reasons for influencing the development of the related equipment of the unmanned underwater vehicle, and is also a key technical difficulty needing key attack. In addition, the conventional vibration reduction and noise reduction technical means can generate great deformation in a deep water environment, so that the acoustic detection matrix can generate great relative displacement relative to the shell, the bonding layer of the sound-transmitting rubber, the transducer array element and the shell is torn, the sealing is invalid, and the propagation of acoustic waves of the acoustic detection matrix is seriously influenced, so that the acoustic detection cannot be performed. Therefore, under the application trend of the deepwater aircraft, designing a vibration isolation and noise reduction structure suitable for the acoustic detection matrix of the deepwater aircraft becomes a key technology for influencing the development of the deepwater in the future and occupying the deepwater. Disclosure of Invention In order to solve the problem that under the trend of application development of a deepwater aircraft, the deepwater pressure-resistant, low-compression and high-vibration-isolation technology of the acoustic detection matrix becomes the key of the aircraft to enter deep sea or not, and the technical problem to be solved, the invention provides the vibration-isolation and noise-reduction structure for the deepwater aircraft detection matrix. In order to achieve the above purpose, the present invention adopts the following technical scheme: the vibration isolation and noise reduction structure comprises a primary vibration isolation structure arranged between a matrix supporting seat and an inner cylinder body, wherein the primary vibration isolation structure is a vibration isolation and noise reduction main body structure; The vibration isolation noise reduction main body structure is mainly formed by alternately laminating a resin plate layer and a composite rubber layer, wherein a positioning isolation rubber pad is arranged at the bottom of the vibration isolation noise reduction main body structure, and mass blocks uniformly distributed along the circumference are embedded in the composite rubber layer to form a local resonance design composite structure. Preferably, the mass is cylindrical or cylindrical. Preferably, the mass block is provided with a plurality of circles, and the circles are spaced at a certain distance. The vibration isolation and noise reduction main structure comprises a composite rubber layer, a resin plate layer and/or a metal plate layer which are tightly attached together, wherein the composite rubber layer adopts a local resonance design structure with an embedded mass block, the vibration isolation frequency is adjusted, and meanwhile, the support rigidity of the matrix is ensured by combining the resin plate layer/the metal plate layer. The vibration isolation and noise reduction structure also comprises a secondary vibration isolation structure arranged between the inner cylinder body and the outer shell body of the acoustic detection matrix, wherein the secondary vibration isolation structure comprises a composite rubber flat pad and a sealing ring; the composite rubber flat pad is arranged on a fixing piece between the inner cylinder body and the outer shell body, and the sealing ring is arranged in a sealing groove on the outer side face of the inner cylinder body. Preferably, the composite rubber flat pad is of a three-layer structur