A sound insulation and vibration reduction device applied to a large underwater vehicle towed line array

Abstract

A sound insulation and vibration reduction device applied to a large underwater vehicle towed line array, comprising: a sound insulation cabin top cover, a sound insulation cabin, a sound insulation cabin top cover felt, a sound insulation cabin wall sound insulation felt, a vibration damper support bracket and a damping vibration damper. The sound insulation cabin top cover is fixedly installed on the top of the sound insulation cabin, the vibration damper support bracket is fixedly installed on the side panel of the sound insulation cabin, the top cover sound insulation felt and the cabin wall sound insulation felt are fixed in the inner surface of the top cover and the inner wall of the sound insulation cabin cavity respectively through adhesives; the damping vibration damper is installed on the vibration damper support bracket and used for damping; after the sound insulation cabin and the sound insulation cabin wall sound insulation felt are bonded, the sensitive sensor is fixed in the sound insulation cabin, the sensitive sensor device, signal transmission optical fiber and cable in the sound insulation cabin are bonded and fixed to the sound insulation cabin wall sound insulation felt through adhesives, and the optical fiber and cable wiring are taken out of the cabin through the through round hole of the front side wall of the sound insulation cabin; the sound insulation cabin is filled with insulating high-damping damping filling glue of a certain height. The present application realizes sound insulation and vibration reduction among multiple media in a real environment.

Description

Technical Field

[0001] This invention relates to a sound insulation and vibration reduction device for use in towed linear arrays of large submersibles, belonging to the field of underwater acoustic detection technology for submersibles. Background Technology

[0002] Submersibles can utilize towed linear arrays to avoid the impact of their axial dimensions on underwater acoustic detection performance, enabling covert reconnaissance, surveillance, tracking, identification, and target localization at ultra-long distances. This makes it a high-performance underwater acoustic detection device. Fiber optic hydrophone towed linear arrays offer advantages such as being passive, miniaturized, and easily multiplexed. When mounted on submersibles, they significantly enhance the submersible's detection capabilities and payload capacity. This is a key new type of underwater equipment being developed by Western countries such as the US and Russia, and it is also a crucial technology that my country urgently needs to master.

[0003] While fiber optic hydrophone towed linear array demodulation systems enhance the noise detection capabilities of sonar systems, their sensitive components are also extremely sensitive to noise and vibration. Direct exposure to the detection environment introduces significant background noise into the sonar system, raising its target detection limit. In harsh marine environments with high sea states, this can even lead to sonar system failure, impacting the reconnaissance, early warning, tracking, and identification of suspicious targets by underwater equipment. Therefore, there is an urgent need to develop a small-scale sound insulation and vibration reduction device suitable for harsh marine environments.

[0004] Currently, the most common sound insulation methods utilize the principles of sound reflection or absorption along the vibration propagation path to block incident noise. One approach involves laying honeycomb porous sound-absorbing structures on the surface of the sound insulation structure. However, when the sound energy reaches the upper limit of the sound-absorbing structure's energy conversion, the sound absorption effect will be greatly reduced. Furthermore, honeycomb porous sound-absorbing structures age quickly, further diminishing their effectiveness. Another method is to set up sound barriers, utilizing the abrupt change in the characteristic impedance of the surface material to achieve sound reflection. However, existing sound barriers suffer from problems such as large size, significant sound leakage due to gaps in splicing and installation, and poor sound insulation performance. Regarding vibration reduction, high-damping vibration-damping layers or damping vibration absorbers are often used. However, the vibration reduction principles of these methods suffer from low efficiency of traditional high-damping vibration-damping layers. While displacement-amplified viscous high damping dissipates vibration energy, it also introduces vibration into the core components inside the vibration-damping equipment. Although this reduces the impact of external vibrations, it simultaneously increases vibrations between internal components, making effective sound insulation and vibration reduction impossible.

[0005] Most existing domestic patents for sound insulation and vibration reduction devices are applied in the construction industry. The sound insulation and vibration reduction described by the inventors are mostly limited to single-medium applications, meaning they only achieve vibration isolation or attenuation between solids. They cannot achieve sound insulation and vibration reduction in complex multi-medium environments, nor can they accommodate the miniaturization design of sound insulation and vibration reduction devices. However, sound propagation is essentially the vibration of the air medium, and in real-world sound insulation and vibration reduction must consider both air and solid media to achieve good results.

[0006] Chinese Patent Publication No. CN112392164A discloses a sound insulation and vibration reduction structure. This structure uses an elastic sound insulation panel and mass blocks to form a sound-collecting cavity, preventing sound sources from escaping. Simultaneously, the mass blocks increase the structure's rotational inertia, widening the operating frequency band. However, this method uses multiple mass blocks to widen the operating frequency band, resulting in a large, heavy, and inefficient device. Furthermore, the sound insulation panel lacks high-performance acoustic materials and professional sound insulation design, leading to low sound insulation efficiency. The sound insulation panel itself is integrally formed with the first and second mass blocks, making processing difficult and costly, and it cannot effectively block the transmission of vibrations inside and outside the sound insulation and vibration reduction structure.

[0007] Chinese Patent Publication No. CN116517176A discloses a sound insulation and vibration reduction composite damping device, which uses steel springs and synthetic rubber damping materials to form a suspended buffer vibration reduction hanger. Although it is only aimed at the construction industry, its vibration reduction essence can be applied to the field of miniaturized sensors through model scaling. However, the above method does not consider the propagation of vibration in complex multi-media environments, cannot block the propagation of sound in the air, cannot achieve effective sound insulation measures for sensitive devices, and also increases the vibration between internal components of the equipment, thus failing to achieve effective sound insulation and vibration reduction.

[0008] The existing sound insulation and vibration reduction structures cannot be applied to the background requirements of this invention. Summary of the Invention

[0009] The technical problem solved by the present invention is to overcome the shortcomings of the prior art and provide a sound insulation and vibration reduction device for towed linear arrays of large submarines. This solves the technical problems existing in the prior art, such as the inability to implement sound insulation and vibration reduction measures between multiple media in real environments, and the fact that displacement-enlarged vibration damping devices amplify the relative displacement between internal components of the sound insulation and vibration reduction device, causing sensitive components (such as sensitive optical fibers, signal cables, movable connectors, etc.) inside the device to generate new vibration sources.

[0010] The technical solution of this invention is:

[0011] A sound insulation and vibration reduction device for use in towed linear arrays of large submarines includes: a sound insulation chamber top cover, a sound insulation chamber, a sound insulation felt for the sound insulation chamber top cover, a sound insulation felt for the sound insulation chamber wall, a vibration damper support bracket, and a damping vibration damper.

[0012] The soundproof cabin top cover is fixedly installed on the top of the soundproof cabin, the vibration damper support bracket is fixedly installed on the side panel of the soundproof cabin, the soundproof felt of the soundproof cabin top cover is fixed to the inner surface of the soundproof cabin top cover with adhesive, and the soundproof felt of the soundproof cabin wall is fixed to the inner wall of the soundproof cabin cavity with adhesive; the damping vibration damper is installed on the vibration damper support bracket for vibration reduction.

[0013] After the soundproof chamber and the soundproof felt of the soundproof chamber wall are bonded together, the sensitive sensor is fixed in the soundproof chamber. The power supply and signal transmission optical fiber and cable of the sensitive sensor device in the soundproof chamber are bonded and fixed to the soundproof felt of the soundproof chamber wall by adhesive. The optical fiber and cable run out of the chamber through the through round hole on the front side wall of the soundproof chamber. The soundproof chamber is filled with a certain height of insulating high damping vibration reduction potting compound.

[0014] Furthermore, it also includes the soundproof cabin set bolts and the vibration damper support bracket set bolts. The soundproof cabin top cover is fixedly connected to the soundproof cabin through the soundproof cabin set bolts, and the soundproof cabin is fixedly connected to the vibration damper support bracket through the vibration damper support bracket set bolts.

[0015] Furthermore, the soundproof cabin top cover is a thin plate boss structure with a rectangular cross-section. The inner surface is a boss. Let the geometric center of the thin plate boss structure be the origin coordinate, and establish a coordinate system with the length direction as the x-axis, the width direction as the y-axis, and the thickness pointing towards the boss direction as the z-axis.

[0016] The thin plate boss structure is an axisymmetric structure about the normal plane xoz and yoz of the thin plate boss passing through the origin. The length-to-width ratio of the base is set to 1.3:1, and the ratio of the boss thickness to the base thickness is set to 2:3.

[0017] Furthermore, the soundproof cabin top cover is uniformly provided with 12 through-hole countersunk holes matched with M4 bolts along the normal direction of the four sides of the boss thin plate. Among them, 4 holes are provided on one side of the long side and 2 holes are provided on one side of the short side. The ratio of the hole gap to the length of the long side of the thin plate bottom platform is set to 1:4. The distance from the center of the countersunk hole to the boundary of the thin plate is twice the distance from the edge of the boss to the edge of the thin plate bottom platform.

[0018] Furthermore, the soundproof chamber is a rectangular cavity with its interior hollowed out and its top removed, and the length and width of the soundproof chamber are the same as the top cover of the soundproof chamber.

[0019] The bottom thickness of the soundproof chamber is the same as the side wall thickness. A recessed platform is provided on the top of the soundproof chamber along the four walls downwards. The depth of the recessed platform is 0.2 mm greater than the thickness of the top cover boss of the soundproof chamber. The width of the upper edge of the recessed platform is 0.2 mm less than the width of the lower edge of the bottom platform of the top cover of the soundproof chamber. Twelve M4 threaded blind holes are provided at the bottom of the recessed platform of the soundproof chamber. The spacing and position of the holes are the same as the position of the through countersunk hole of the top cover of the soundproof chamber. After the soundproof chamber and the top cover of the soundproof chamber are fitted together, they are fixedly connected by the set bolts of the soundproof chamber.

[0020] Furthermore, the bottom of the soundproof chamber is provided with threaded blind holes for fixing sensor devices. Twelve M3 threaded blind holes are provided on the vertical sides of the four outer walls of the bottom of the soundproof chamber. The centers of all twelve M3 threaded blind holes are at the same height, and the distance between them and the bottom of the soundproof chamber is set to 5-7 mm. Four threaded holes are provided along the long side, symmetrically distributed about the center plane, and numbered 1, 2, 3, and 4 from left to right. The spacing between threaded holes 1 and 2, and between threaded holes 3 and 4, is consistent at 15-17 mm, while the spacing between threaded holes 2 and 3 is 100 mm. Two threaded holes are provided along the short side, symmetrically distributed about the center plane, with the same spacing as threaded holes 1 and 2.

[0021] Furthermore, the long side wall of the soundproof cabin is provided with a through circular hole for sensor power supply and signal routing. The center of the circular hole in the horizontal direction is located on the central symmetry plane of the side wall. The ratio of the distance between the center of the circular hole and the top plane of the soundproof cabin to the distance between the center of the circular hole and the bottom plane of the soundproof cabin in the vertical direction is set to 7:10. The circular hole on the outside of the soundproof cabin should be rounded to avoid cutting or breaking the cable.

[0022] Furthermore, the soundproof felt on the roof of the soundproof cabin and the soundproof felt on the walls of the soundproof cabin are both 2mm thick flexible rectangular felt pads made of high-density damping material made of PVC mixed with metal particles.

[0023] Furthermore, the adhesive is a two-component room-temperature curing adhesive. During bonding, the geometric centers of the main and auxiliary components should be kept consistent, the length and width directions should be aligned, and the adhesive layer thickness should be between 0.1 and 0.5 mm.

[0024] Furthermore, the shock absorber support bracket is a structure with a cross-section of "⊥", wherein the bottom side "—" is not a left-right symmetrical structure with "∣" as the center plane, and is represented by a long side and a short side, with the length ratio of the long side to the short side set to 3:1.

[0025] Furthermore, the damper support bracket has a through hole of Φ4.5 on the long side platform of the "-" shaped bottom edge. The normal phase of the hole is perpendicular to the platform surface, the center of the hole is located on the central symmetry plane of the long side of the platform, and the distance from the outer envelope of the long side of the platform is not less than 6mm.

[0026] On the vertical plane of the "∣" shaped side, there is a through-hole with M3 matching on each side. The countersunk hole faces the long side of the bottom edge of the "—" shaped side. The distance between the center height of the two countersunk holes and the upper platform of the bottom edge of the "—" shaped side is set to 6mm. The hole spacing is the same as the hole spacing of the No. 1 and No. 2 threaded holes.

[0027] Furthermore, after the soundproof chamber and the soundproof felt of the soundproof chamber wall are bonded together, the sensor device is fixed to the soundproof chamber body using set bolts, and the cables inside the chamber are fixed to the bottom soundproof felt using adhesive. The power supply and signal lines of the sensor are output to the outside of the soundproof chamber through the through-hole. The wiring hole is sealed with silicone rubber. After the silicone solidifies, a certain height of insulating high-damping vibration-damping potting compound is poured into the soundproof chamber. After standing for a period of time, the air bubbles are removed.

[0028] Furthermore, the thickness of the soundproof cabin roof and the walls of the soundproof cabin, as well as the number of soundproof felt bonding layers, have the following functional relationship with the sound insulation and vibration damping device:

[0029] R = 13.5 × log 10 (ρ×d+5×n)+13

[0030] Where R is the sound insulation of the sound insulation and vibration reduction device, ρ is the material density of the sound insulation chamber top cover and the sound insulation chamber, d is the wall thickness of the sound insulation chamber top cover and the sound insulation chamber, and n is the number of bonding layers of the sound insulation felt.

[0031] Taking into account both sound insulation performance and the size and weight of the device, this invention selects aluminum alloy as the material for both the soundproof chamber top cover and the soundproof chamber itself, with a density of 2.7 g / cm³. 3 The wall thickness is 0.5cm, and the sound insulation felt has 1 adhesive layer.

[0032] Furthermore, the damping vibration damper includes upper and lower damping rubbers and fastening bolts. The installation method of the vibration damper support bracket is as follows: insert the damping rubbers into the reserved installation holes of the vibration damper support bracket, and then screw the vibration damper support bracket and the damping rubbers into the reserved threaded holes on the installation plane of the sound insulation and vibration damping device through the fastening bolts.

[0033] Furthermore, the resonant frequency of the selected damping shock absorber is 20–100 Hz.

[0034] The advantages of this invention compared to the prior art are:

[0035] (1) The present invention adopts a high-density metal sound insulation chamber and a high-performance damping sound insulation felt matching method to effectively improve the sound insulation performance of the device. According to empirical formula calculation, the sound insulation amount can be effectively controlled by adjusting the thickness of the sound insulation chamber and the thickness of the sound insulation felt layer.

[0036] (2) The sound insulation chamber of the sound insulation and vibration reduction device of the present invention uses high-density materials to reduce the size of the device and achieve miniaturization while ensuring that the sound insulation requirements are met.

[0037] (3) The sound insulation and vibration reduction device of the present invention is filled with insulating high damping vibration reduction potting compound, which can effectively fix the internal sensitive devices and wiring, increase the system damping, and avoid the generation of new vibration sources due to relative displacement inside the device.

[0038] (4) The sound insulation and vibration reduction device of the present invention is fixedly connected to the installation plane by a standard aviation inertial navigation silicone rubber vibration damper, which can effectively improve the vibration reduction performance of the device, and the vibration reduction effect can be effectively controlled by replacing vibration dampers with different performance.

[0039] (5) The sound insulation and vibration reduction device of the present invention is adapted to the volume of sensitive devices and is designed as a flat cuboid structure to minimize the center of gravity of the sound insulation and vibration reduction device and the center of gravity of the sealed cabin of the submersible equipment, thereby reducing the risk of the submersible rolling. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the external packaging structure of the sound insulation and vibration reduction device of the present invention;

[0041] Figure 2 This is a cross-sectional view of the internal assembly of the sound insulation and vibration reduction device of the present invention;

[0042] Figure 3 This is a cross-sectional view of the internal filling of the soundproof chamber of the present invention;

[0043] Figure 4 This is a cross-sectional view of the damping vibration damper installation structure of the present invention. Detailed Implementation

[0044] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0045] like Figure 1 As shown, the present invention proposes a sound insulation and vibration reduction device for a towed linear array of large submarines, comprising: a sound insulation chamber top cover 1, a sound insulation chamber 2, a sound insulation felt for the sound insulation chamber top cover 3, a sound insulation felt for the sound insulation chamber wall 4, a vibration damper support bracket 6, a damping vibration damper 7, a sound insulation chamber set bolt 5, and a vibration damper support bracket set bolt 8.

[0046] The soundproof chamber top cover 1 and the soundproof chamber 2 are fixedly connected by soundproof chamber set bolts 5, and the soundproof chamber 2 is fixedly connected to the vibration damper support bracket 6 by vibration damper support bracket set bolts 8. The soundproof felt 3 of the soundproof chamber top cover is fixed to the inner surface of the soundproof chamber top cover 1 by adhesive 10, and the soundproof felt 4 of the soundproof chamber wall is fixed to the inner wall of the inner cavity of the soundproof chamber 2 by adhesive 10; the damping vibration damper 7 is installed on the vibration damper support bracket 6 for vibration damping.

[0047] After the soundproof chamber 2 is bonded to the soundproof chamber wall soundproof felt 4, the sensitive sensor is fixed in the soundproof chamber 2. The power supply and signal transmission optical fiber and cable of the sensitive sensor device in the soundproof chamber 2 are bonded and fixed to the soundproof chamber wall soundproof felt 4 by adhesive 10. The optical fiber and cable run out of the chamber through the through round hole on the front side wall of the soundproof chamber 2. The soundproof chamber 2 is filled with a certain height of insulating high damping vibration reduction potting compound 9.

[0048] The soundproof and vibration-damping chamber, consisting of the soundproof top cover, the soundproof chamber, the soundproof felt on the soundproof top cover, and the soundproof felt on the soundproof walls, is a flat rectangular structure. The interior only houses the sensitive sensor devices to be soundproofed and vibration-damped, the device power supply, signal optical fibers, and electrical cables, etc., to maximize the reduction of space in the vertical direction, lower the center of gravity of the soundproof and vibration-damping device, and at the same time, lower the center of gravity of the underwater vehicle equipment sealed chamber as much as possible to reduce the risk of the underwater vehicle rolling.

[0049] Preferably, the diameter of the through hole should be set as small as possible while allowing multiple connectors to pass through simultaneously.

[0050] Preferably, the soundproof cabin top cover 1 is a thin plate boss structure with a rectangular cross-section. The inner surface is a boss. Let the geometric center of the thin plate boss structure be the origin coordinate, and establish a coordinate system with the length direction as the x-axis, the width direction as the y-axis, and the thickness pointing towards the boss direction as the z-axis.

[0051] The thin plate boss structure is an axisymmetric structure about the normal plane xoz and yoz of the thin plate boss passing through the origin. The length-to-width ratio of the base is set to 1.3:1, and the ratio of the boss thickness to the base thickness is set to 2:3.

[0052] Preferably, the soundproof cabin top cover is uniformly provided with 12 through-hole countersunk holes matched with M4 bolts along the normal direction of the four sides of the boss thin plate, of which 4 are provided on one side of the long side and 2 are provided on one side of the short side. The ratio of the hole gap to the length of the long side of the thin plate bottom platform is set to 1:4. The distance from the center of the countersunk hole to the boundary of the thin plate is twice the distance from the edge of the boss to the edge of the thin plate bottom platform.

[0053] The soundproof chamber is manufactured from a single piece of high-density material, with a high-performance sound-insulating felt lining the interior. Sealant is used to fill any gaps, ensuring no air gaps remain. After being tightly assembled with the top cover, the sound-insulating felt on the top cover is tightly embedded in the sound-insulating felt lining the inner walls of the chamber, achieving a comprehensive, integrated sound insulation layer. The wall thickness and the number of sound-insulating felt layers can be rationally designed according to actual sound insulation requirements, resulting in a professional, efficient, and evidence-based sound insulation solution.

[0054] Specifically, the soundproof chamber 2 is a rectangular cavity with its interior hollowed out and its top removed. The length and width of the soundproof chamber 2 are the same as those of the soundproof chamber top cover 1.

[0055] The bottom thickness of the soundproof chamber is the same as the side wall thickness. A recessed platform is provided on the top of the soundproof chamber along the four walls downwards. The depth of the recessed platform is 0.2 mm greater than the thickness of the top cover protrusion of the soundproof chamber. The width of the upper edge of the recessed platform is 0.2 mm less than the width of the lower edge of the bottom platform of the top cover of the soundproof chamber. Twelve M4 threaded blind holes are provided at the bottom of the recessed platform of the soundproof chamber. The spacing and position of the holes are the same as the position of the through countersunk hole of the top cover of the soundproof chamber. After the soundproof chamber and the top cover of the soundproof chamber are fitted together, they are fixedly connected by the soundproof chamber set bolts 5.

[0056] The bottom of the soundproof chamber 2 is provided with threaded blind holes for fixing sensor devices. Twelve M3 threaded blind holes are provided on the four vertical sides of the bottom outer wall of the soundproof chamber 2, with the centers of all twelve holes at the same height and a distance of 5-7 mm between them and the bottom of the soundproof chamber 2. Four threaded holes are provided along the long side, symmetrically distributed about the center plane, and numbered 1, 2, 3, and 4 from left to right. The spacing between holes 1 and 2, and between holes 3 and 4, is consistent at 15-17 mm, while the spacing between holes 2 and 3 is 100 mm. Two threaded holes are provided along the short side, symmetrically distributed about the center plane, with the same spacing as holes 1 and 2.

[0057] Preferably, 12 M3 threaded blind holes are provided on the vertical sides of the four outer walls at the bottom of the soundproof chamber 2. The centers of the blind holes must be at the same height, and the distance error between them and the bottom of the soundproof chamber 2 shall not exceed 0.05mm.

[0058] The soundproof chamber 2 has a through circular hole on its long side wall for sensor power supply and signal routing. The center of the circular hole is located on the central symmetry plane of the side wall in the horizontal direction. The ratio of the distance between the center of the circular hole and the top plane of the soundproof chamber 2 to the distance between the center of the circular hole and the bottom plane of the soundproof chamber 2 in the vertical direction is set to 7:10. The circular hole on the outside of the soundproof chamber should be rounded to avoid cutting or breaking the cable.

[0059] Preferably, the soundproof felt 3 on the top cover of the soundproof cabin and the soundproof felt 4 on the walls of the soundproof cabin are both 2mm thick flexible rectangular felt pads made of high-density damping material made of PVC mixed with metal particles.

[0060] Preferably, the adhesive 10 is a two-component room temperature curing adhesive. During bonding, the geometric centers of the main and auxiliary bodies are kept consistent, the length and width directions are aligned, and the thickness of the adhesive layer should be between 0.1 and 0.5 mm.

[0061] The bottom of the soundproof cabin of this invention is fixedly connected to the device mounting plane by six standard aviation inertial navigation silicone rubber vibration dampers with a resonant frequency of 20-100Hz. The symmetrical installation can effectively reduce the impact of external vibration on the soundproof vibration damping device, improve the vibration damping performance of the device, and by selecting different models of vibration dampers, different vibration environments can be dealt with.

[0062] Specifically, the shock absorber support bracket 6 is a structure with a cross-section of "⊥". The bottom side "—" is not a left-right symmetrical structure with "∣" as the center plane. It is represented by a long side and a short side, and the length ratio of the long side to the short side is set to 3:1.

[0063] The shock absorber support bracket 6 has a through hole of Φ4.5 on the long side platform of the bottom edge of the "-" shaped base. The normal phase of the hole is perpendicular to the platform surface, the center of the hole is located on the central symmetry plane of the long side of the platform, and the distance from the outer envelope of the long side of the platform is not less than 6mm.

[0064] On the vertical plane of the "∣" shaped side, there is a through-hole with M3 matching on each side. The countersunk hole faces the long side of the bottom edge of the "—" shaped side. The distance between the center height of the two countersunk holes and the upper platform of the bottom edge of the "—" shaped side is set to 6mm. The hole spacing is the same as the hole spacing of the No. 1 and No. 2 threaded holes.

[0065] See Figure 2 and Figure 3 After the soundproof chamber 2 is bonded to the soundproof chamber wall soundproof felt 4, the sensor device is fixed to the soundproof chamber 2 using set bolts, and the cable inside the chamber is fixed to the bottom soundproof felt using adhesive 10. After the sensitive sensor is fixed and the optical fiber and cable exit the chamber through the through round hole, the cable hole is sealed with silicone rubber. After the silicone solidifies, a certain height of insulating high damping vibration reduction potting compound 9 is filled into the soundproof chamber 2. The height of the potting compound should take into account the remaining space height after the soundproof chamber 2 and the soundproof chamber top cover 1 are assembled, minus the thickness of the soundproof chamber top cover soundproof felt 3 and the soundproof chamber wall soundproof felt 4, and should not exceed this height value.

[0066] Preferably, the potting process should be carried out on a completely flat surface, and the potting compound should completely submerge the suspended cable. After potting, the mixture should be left to stand for a period of time until all air bubbles inside the potting compound are expelled and solidified.

[0067] The soundproof chamber of this invention is filled with insulating high-damping vibration-damping potting compound, which can effectively fix sensitive devices, optical fibers, and cable routing inside the soundproof chamber, increase system damping, and ensure that when external vibration causes displacement of the soundproof and vibration-damping device, the devices inside the soundproof and vibration-damping device do not generate new vibration sources.

[0068] This invention employs a high-density metal soundproof chamber and a high-performance damping soundproof felt matching method to effectively improve the sound insulation performance of the device. Furthermore, based on empirical formulas, the sound insulation amount can be effectively controlled by adjusting the thickness of the soundproof chamber and the thickness of the soundproof felt layer.

[0069] The wall thickness of the soundproof chamber top cover 1 and the soundproof chamber 2, and the number of soundproof felt bonding layers, have the following functional relationship with the sound insulation and vibration reduction device:

[0070] R = 13.5 × log 10 (ρ×d+5×n)+13

[0071] Where R is the sound insulation of the sound insulation and vibration reduction device, ρ is the material density of the sound insulation chamber top cover and the sound insulation chamber, d is the wall thickness of the sound insulation chamber top cover and the sound insulation chamber, and n is the number of bonding layers of the sound insulation felt.

[0072] Preferably, taking into account both sound insulation performance and the size and weight of the device, the material selected for the soundproof chamber top cover 1 and the soundproof chamber 2 is aluminum alloy with a density of 2.7 g / cm³. 3 The wall thickness is 0.5cm, and the sound insulation felt has 1 adhesive layer.

[0073] The damping vibration damper 7 consists of six aerospace inertial navigation silicone rubber vibration dampers. This invention takes into account the frequency of external environmental interference vibration signals and vibration reduction performance. The vibration damper support bracket 6 is fixedly connected to the equipment mounting base through the damping vibration damper 7.

[0074] like Figure 4 As shown, the damping damper 7 includes two damping rubbers 11 and a fastening bolt 12. The damper support bracket 6 is installed as follows: the damping rubbers 11 are inserted into the reserved installation holes of the damper support bracket 6, and then the damper support bracket 6 and the damping rubbers 11 are screwed into the reserved threaded holes on the installation plane of the sound insulation and vibration reduction device by the fastening bolt 12.

[0075] Preferably, the screwing-in dimensions of the fastening bolts 12 must strictly comply with the installation specifications of the selected damping shock absorber 7, and must not exceed the tolerance, so as not to cause excessive deformation or excessive looseness of the damping rubber 11.

[0076] Preferably, the resonant frequency of the damping shock absorber 7 selected in this invention is 20 to 100 Hz.

[0077] The parts of this invention not described in detail are common knowledge to those skilled in the art.

Claims

1. A sound insulation and vibration reduction device for use in towed linear arrays of large submarines, characterized in that... include: Soundproof cabin top cover (1), soundproof cabin (2), soundproof cabin top cover soundproof felt (3), soundproof cabin wall soundproof felt (4), vibration damper support bracket (6) and damping vibration damper (7). The soundproof chamber top cover (1) is fixedly installed on the top of the soundproof chamber (2), the vibration damper support bracket (6) is fixedly installed on the side panel of the soundproof chamber (2), the soundproof felt (3) of the soundproof chamber top cover is fixed to the inner surface of the soundproof chamber top cover (1) by adhesive (10), and the soundproof felt (4) of the soundproof chamber wall is fixed to the inner wall of the inner cavity of the soundproof chamber (2) by adhesive (10); the damping vibration damper (7) is installed on the vibration damper support bracket (6) for vibration damping; After the soundproof chamber (2) and the soundproof wall soundproof felt (4) are bonded together, the sensitive sensor is fixed in the soundproof chamber (2). The power supply and signal transmission optical fiber and cable of the sensitive sensor device in the soundproof chamber (2) are bonded and fixed to the soundproof wall soundproof felt (4) by adhesive (10). The optical fiber and cable run out of the chamber through the through round hole on the front side wall of the soundproof chamber (2). The soundproof chamber (2) is filled with a certain height of insulating high damping vibration reduction potting compound (9). The soundproof cabin top cover (1) is a thin plate boss structure with a rectangular cross section. The inner surface is a boss. Let the geometric center of the thin plate boss structure be the origin coordinate, and establish a coordinate system with the length direction as the x-axis, the width direction as the y-axis, and the thickness pointing towards the boss direction as the z-axis. The thin plate boss structure is an axisymmetric structure about the normal plane xoz and yoz of the thin plate boss passing through the origin. The length-to-width ratio of the base is set to 1.3:1, and the ratio of the boss thickness to the base thickness is set to 2:

3. The soundproof cabin top cover is uniformly provided with 12 through-hole countersunk holes matched with M4 bolts along the normal direction of the four sides of the boss thin plate. Among them, 4 holes are provided on one side of the long side and 2 holes are provided on one side of the short side. The ratio of the hole gap to the length of the long side of the thin plate bottom platform is set to 1:

4. The distance from the center of the countersunk hole to the boundary of the thin plate is twice the distance from the edge of the boss to the edge of the thin plate bottom platform. The soundproof chamber (2) is a rectangular cavity with its interior hollowed out and its top removed. The length and width of the soundproof chamber (2) are the same as those of the top cover (1) of the soundproof chamber. The bottom thickness of the soundproof chamber is the same as the side wall thickness. A recessed platform is provided on the top of the soundproof chamber along the four walls. The depth of the recessed platform is 0.2 mm greater than the thickness of the top boss of the soundproof chamber. The width of the upper edge of the recessed platform is 0.2 mm less than the width of the lower edge of the bottom platform of the soundproof chamber. Twelve M4 threaded blind holes are provided at the bottom of the recessed platform of the soundproof chamber. The hole spacing and position are the same as the through countersunk hole position of the top cover of the soundproof chamber. After the soundproof chamber and the top cover of the soundproof chamber are fitted together, they are fixedly connected by the soundproof chamber set bolts (5). The soundproof chamber (2) has a through circular hole on its long side wall for sensor power supply and signal routing. The center of the circular hole is located on the central symmetry plane of the side wall in the horizontal direction. The ratio of the distance between the center of the circular hole and the top plane of the soundproof chamber (2) to the distance between the center of the circular hole and the bottom plane of the soundproof chamber (2) in the vertical direction is set to 7:

10. The circular hole on the outside of the soundproof chamber should be rounded to avoid cutting or breaking the cable. The soundproof cabin roof soundproof felt (3) and the soundproof cabin wall soundproof felt (4) are both 2mm thick flexible rectangular felt pads made of PVC mixed with metal particles and high-density damping material. After the soundproof chamber (2) and the soundproof felt (4) of the soundproof chamber wall are bonded together, the sensor device is fixed in the soundproof chamber (2) by using set bolts, and the cable inside the chamber is fixed to the bottom soundproof felt by using adhesive (10). The power supply and signal line of the sensor are output to the outside of the soundproof chamber (2) through the through hole. The wiring hole is sealed with silicone rubber. After the silicone solidifies, a certain height of insulating high damping vibration reduction potting compound (9) is filled into the soundproof chamber (2). After standing for a period of time, the air bubbles are discharged. The damping damper (7) includes two damping rubbers (11) and fastening bolts (12). The damper support bracket (6) is installed as follows: the damping rubbers (11) are inserted into the reserved installation holes of the damper support bracket (6), and then the damper support bracket (6) and the damping rubbers (11) are screwed into the reserved threaded holes on the installation plane of the sound insulation and vibration reduction device by fastening bolts (12).

2. The sound insulation and vibration reduction device for a towed linear array of large submarines according to claim 1, characterized in that: It also includes soundproof chamber set bolts (5) and damper support bracket set bolts (8). The soundproof chamber top cover (1) and the soundproof chamber (2) are fixedly connected by the soundproof chamber set bolts (5), and the soundproof chamber (2) and the damper support bracket (6) are fixedly connected by the damper support bracket set bolts (8).

3. The sound insulation and vibration reduction device for a towed linear array of large submarines according to claim 1, characterized in that: The bottom of the soundproof chamber (2) is provided with threaded blind holes for fixing sensor devices. Twelve M3 threaded blind holes are provided on the vertical sides of the four outer walls of the bottom of the soundproof chamber (2). The centers of the twelve M3 threaded blind holes are all at the same height, and the distance between them and the bottom of the soundproof chamber (2) is set to 5-7 mm. Four threaded holes are provided on one side along the long side, symmetrically distributed about the center plane, and are named No. 1, No. 2, No. 3, and No. 4 from left to right. The spacing between No. 1 and No. 2, and between No. 3 and No. 4 is consistent, set to 15-17 mm. The spacing between No. 2 and No. 3 is set to 100 mm. Two threaded holes are provided on one side along the short side, symmetrically distributed about the center plane, and the hole spacing is consistent with the hole spacing of No. 1 and No.

2.

4. The sound insulation and vibration reduction device for a towed linear array of large submarines according to claim 1, characterized in that: The adhesive (10) is a two-component room temperature curing adhesive. When bonding, the geometric centers of the main body and the auxiliary body should be kept consistent, the length and width directions should be aligned, and the thickness of the adhesive layer should be between 0.1 and 0.5 mm.

5. The sound insulation and vibration reduction device for a towed linear array of large submarines according to claim 1, characterized in that: The shock absorber support bracket (6) is a structure with a "⊥" shape in cross section. The bottom side "—" is not a left-right symmetrical structure with "∣" as the center plane. It is represented by a long side and a short side, and the length ratio of the long side to the short side is set to 3:

1.

6. The sound insulation and vibration reduction device for a towed linear array of large submarines according to claim 5, characterized in that: The shock absorber support bracket (6) has a through hole of Φ4.5 on the long side platform of the bottom edge of the "-" shaped bottom edge. The normal phase of the hole is perpendicular to the platform surface, the center of the hole is located on the central symmetry plane of the long side of the platform, and the distance from the outer envelope of the long side of the platform is not less than 6mm. On the vertical plane of the "∣" shaped side, there is a through-hole with M3 matching on each side. The countersunk hole faces the long side of the bottom edge of the "—" shaped side. The distance between the center height of the two countersunk holes and the upper platform of the bottom edge of the "—" shaped side is set to 6mm. The hole spacing is the same as the hole spacing of the No. 1 and No. 2 threaded holes.

7. The sound insulation and vibration reduction device for a towed linear array of large submarines according to claim 1, characterized in that: The wall thickness of the soundproof cabin top cover (1) and the soundproof cabin (2) and the number of soundproof felt bonding layers have the following functional relationship with the sound insulation and vibration reduction device: in, The sound insulation amount of the sound insulation and vibration damping device. The material density of the soundproof cabin roof and the soundproof cabin itself. The thickness of the soundproof cabin roof and the walls of the soundproof cabin. This refers to the number of adhesive layers in the sound insulation felt.

8. The sound insulation and vibration reduction device for a towed linear array of large submarines according to claim 1, characterized in that: The resonant frequency of the selected damping damper (7) is 20-100Hz.

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