A towed sonar oriented to acoustic compatibility and its use method

Abstract

The present invention discloses a towed sonar for acoustic compatibility, comprising a towed sonar and a cable connected to the head end of the towed sonar, the towed sonar comprising a hemispherical bow shell and a cylindrical stern shell, a radial buffer device is provided at the connection between the bow shell and the cable, the radial buffer device is used to realize the circumferential sliding and buffering of the cable at the connection, a plurality of axial buffer devices are evenly distributed along the circumferential direction on the outer surface of the stern shell, a plurality of auxiliary cables are provided along the circumferential direction on the cable, and the connection points of the plurality of auxiliary cables and the cable are located in the same vertical plane, and the axial buffer device corresponds to the auxiliary cables one by one. By providing the radial buffer device and the axial buffer device, the load at the connection between the cable and the towed body is effectively buffered, and the problem of cable damage caused by sudden load change at the connection is solved, thereby improving the use stability and service life of the towed sonar.

Description

Technical Field

[0001] The invention belongs to the technical field of towed sonars, and in particular relates to an acoustically compatible towed sonar and a use method thereof. Technical Background

[0002] With the continuous deepening of scientific and technological research, the radiation noise of submarines has gradually decreased. In addition, the complex marine environment often requires the deployment of multiple surface ships, submarines and other forces in the process of anti-submarine operations. In order to achieve long-range warning detection and continuous tracking of submarines, surface ships, submarines and other forces are usually equipped with high-power, wide-band towed linear array sonars, hull sonars, etc., which ensure underwater safety in the navigation area through noise detection and echo detection.

[0003] However, when multiple surface ships and submarines are deployed to perform underwater missions, due to serious spectrum conflicts among various types of sonars, a certain degree of mutual acoustic interference has occurred, namely the "acoustic compatibility" problem, which has caused the related equipment to not function normally. The complexity of the underwater sound propagation environment has also brought a huge impact on underwater detection. Due to the influence of seawater media and the complexity and variability of the entire marine environment, the temperature, salinity and pressure of seawater will affect the propagation characteristics of sound waves. The noise emitted by ships, aquatic organisms, weather and submarine volcanic activities in the ocean are all major sources of interference to submarine detection sonars.

[0004] Currently, towed sonar is widely used due to its advantage of having no blind spots. The towed body is located behind the hull and connected to the hull (or ship body) by cables. For most towed bodies, the cables are generally connected to the front end of the towed body. However, during underwater operation, the towed body is often affected by hydraulic forces and external interference, such as fish schools, reefs, etc., causing the towed body to swing. During the swinging process, the connection between the towed body and the cable is a stress concentration area. In severe cases, the cable breaks, the towed body and the cable are separated, and the detection work is forced to be interrupted. In addition, the traction during the start and stop of the hull will also cause a sudden change in the load at the connection. Summary of the invention

[0005] In view of this, the present invention intends to provide an acoustically compatible towed sonar and a method of using the same, so as to solve the technical problem in the prior art that the cable is damaged due to a sudden load change at the connection between the cable and the towing body.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] One type is characterized in that it includes a towed sonar and a cable connected to the head end of the towed sonar, the towed sonar includes a hemispherical bow shell and a cylindrical stern shell, a radial buffer device is provided at the connection between the bow shell and the cable, the radial buffer device is used to achieve circumferential sliding and buffering of the cable at the connection, a plurality of axial buffer devices are evenly distributed along the circumferential direction on the outer surface of the stern shell, a plurality of auxiliary cables are circumferentially arranged on the cable and the connection points of the plurality of auxiliary cables and the cable are located in the same vertical plane, and the axial buffer devices correspond one to one to the auxiliary cables.

[0008] Further, the radial buffer device includes a accommodating ring located at the head end of the bow shell, the head end of the bow shell is provided with a mounting hole, the accommodating ring is adapted to the size of the mounting hole, an annular accommodating groove is radially opened on the inner side wall of the accommodating ring, the accommodating groove is concentric with the accommodating ring, a cylindrical connecting block is provided inside the accommodating groove, the thickness of the connecting block is consistent with the axial width of the accommodating groove and the two are in smooth contact, the diameter of the connecting block is greater than one-half of the sum of the inner diameter and the outer diameter of the accommodating groove, a cable is passed through the center position of the end face of the connecting block, an annular protrusion is fixedly connected to the outer side face of the connecting block, a plurality of buffer plates are relatively arranged on both sides of the accommodating groove and a gap is left between the buffer plates on both sides, the buffer plate is located on the outer side of the connecting block, and a plurality of elastic support members are evenly arranged circumferentially between the outer side surface of the connecting block and the side wall of the accommodating groove, and the axis of the elastic support member passes through the center of gravity of the connecting block.

[0009] Furthermore, the inner side surface of the annular protrusion is consistent in size with the outer side surface of the connecting block and the two are fitted together, the two end surfaces of the annular protrusion gradually shrink inward along the axial direction, and the width of the outer side surface of the annular protrusion is consistent with the spacing width between the buffer plates on both sides.

[0010] Furthermore, one end of the buffer plate is fixedly connected to the side wall of the accommodating groove, and the other end of the buffer plate is inclined toward the annular protrusion, and the angle between the buffer plate and the horizontal plane is greater than the angle between the end surface of the annular protrusion and the horizontal plane.

[0011] Furthermore, the axial buffer device includes a rectangular fixed body, a cavity with a rectangular cross-section is opened inside the fixed body, and limiting grooves are arranged on the top and bottom of both sides of the cavity along the length direction. A slider with the same cross-section as the cavity is arranged inside the cavity, and limiting protrusions matching the limiting grooves are arranged at the upper and lower ends of the slider. The free end of the auxiliary cable passes through the end face of the fixed body and is fixedly connected at the center position of the cavity and the side of the slider. A first spring is arranged between the side face of the slider facing away from the auxiliary cable and the end face of the cavity. When the first spring is in a natural state, the portion of the cable located between the bow shell and the connection point of the auxiliary cable is in a bent and relaxed state.

[0012] Furthermore, both sides of the fixed body are provided with side grooves with a triangular cross section, the side grooves are gradually concave in the direction away from the bow shell, and a fixing rod is welded to one end of the side groove away from the bow shell in the vertical direction, and triangular prism-shaped fins of equal height are arranged in the side grooves, the inner side surfaces of the fins are fitted with the inner side surfaces of the side grooves, the outer side surfaces of the fins are flush with the outer side surfaces of the fixed body, and the ends of the fins are rotatably connected to the fixing rods; both sides of the cavity are provided with rectangular through holes , the height of the through hole is smaller than the height of the cavity, the distance between the through hole and the end face of one end of the cavity away from the bow shell is equal to the length of the first spring in the natural state, the side of the through hole away from the cavity is provided with a first limit block and a second limit block in contact with the inner side of the fin, a gap is left between the first limit block and the second limit block, and a stop block is provided on the side of the through hole facing the cavity, one end of the stop block passes through the gap between the first limit block and the second limit block and abuts against the inner side of the fin.

[0013] Furthermore, the top and bottom ends of the fixing rod are both sleeved with limiting rings which are concentric with the fixing rod, the outer diameter of the limiting ring is larger than the diameter of the fixing rod, the fin is rotatably connected to the fixing rod via the limiting ring, and a torsion spring is provided between the fixing rod and the fin.

[0014] Further, the stopper includes a first wedge-shaped body located on the inner side and a second wedge-shaped body located on the outer side, the first wedge-shaped body is slidably connected to the through hole and a portion of the first wedge-shaped body extends into the cavity, the portion of the first wedge-shaped body extending into the cavity gradually tilts inward in a direction away from the bow shell, the second wedge-shaped body is located between the first limit block and the second limit block, and a second spring is provided between the first limit block, the second limit block and the first wedge-shaped body

[0015] The present invention also provides a method for using an acoustic compatible towed sonar, using the above-mentioned acoustic compatible towed sonar, comprising the following steps:

[0016] S1, acquisition of detection signals by towed sonar;

[0017] S2, constructing an ocean environment noise model, where the ocean environment noise model should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including low noise environment, medium noise environment and high noise environment;

[0018] S3, constructing a submarine noise model, where the submarine noise model should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including the radiation noise and self-noise of the submarine;

[0019] S4, constructing a jamming signal source model, where the jamming signal source should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including the acoustic pulses emitted by active acoustic equipment;

[0020] S5, calculating and analyzing the data of each noise source according to the above model, and avoiding the corresponding noise source frequency band obtained by calculation.

[0021] The beneficial effects of the present invention are:

[0022] (1) Compared with the prior art, a radial buffer device is added to reduce the load of the cable at the connection by slowing deformation and consuming energy, thereby protecting the cable at the connection to prevent damage and breakage, thereby improving the stability and service life of the cable.

[0023] (2) By adding an axial buffer device, the sudden traction force is buffered, thereby preventing the sudden traction force from directly acting on the connection between the cable and the towing body, causing excessive load on the cable at the connection.

[0024] (3) When the cable suddenly loses its traction, the fins increase the resistance of the towed body, providing a buffer for the towed body while reducing its speed, thus preventing the towed body from contacting and colliding with the hull due to its own inertia. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0026] Figure 1 It is a schematic diagram of the overall structure of an acoustically compatible towed sonar in Embodiment 1 of the present invention;

[0027] Figure 2 is a cross-sectional view of a radial buffer device in Embodiment 1 of the present invention;

[0028] Figure 3 for Figure 2 The enlarged view of A1 in the middle;

[0029] Figure 4 It is a top view of the axial buffer device in the first embodiment of the present invention;

[0030] Figure 5 for Figure 4 Sectional view along the AA axis (view from right to left);

[0031] Figure 6 It is a front view of the axial buffer device in the first embodiment of the present invention;

[0032] Figure 7 for Figure 6 Cross-sectional view along the middle BB axis (view from top to bottom);

[0033] Figure 8 for Figure 7 The enlarged view of A2 in the middle;

[0034] Fig. 9 for Figure 8 The enlarged view of A3 in the middle;

[0035] Fig.10 for Figure 6 Cross-sectional view along CC direction (view from left to right);

[0036] Fig.11 This is a schematic structural diagram of a fixing rod, a limiting ring and a torsion spring in the first embodiment of the present invention, which is used to illustrate the positional relationship and connection relationship among the three.

[0037] The following are marked in the accompanying drawings:

[0038] Towing body 1, bow shell 11, stern shell 12, tail 13, cable 2, radial buffer device 3, connecting block 31, accommodating ring 32, accommodating groove 321, annular protrusion 33, buffer plate 34, elastic support member 35, axial buffer device 4, auxiliary cable 401, fixed body 402, cavity 403, limiting groove 404, slider 405, limiting protrusion 406, first spring 407, through hole 408, stopper 409, first wedge body 4091, second wedge body 4092, first limiting block 410, second limiting block 411, second spring 412, side groove 413, fixing rod 414, limiting ring 415, fin 416, torsion spring 417, limiting seat 418. DETAILED DESCRIPTION

[0039] Embodiment 1, see Figure 1-Figure 11 .

[0040] like Figure 1As shown, a towed sonar for acoustic compatibility includes a towed body 1 and a cable 2 for connecting the towed body 1 and a ship body. The towed body 1 includes a hemispherical bow shell 11 and a cylindrical stern shell 12. The bow shell 11 and the stern shell 12 together constitute a sonar towed body, and a hydrophone and various sensors can be installed in the internal cavity of the towed body. Four tail wings 13 are evenly spaced in the circumferential direction at one end of the stern shell 12 away from the bow shell 11. The tail wings 13 are integrally formed with the stern shell 12. The arrangement of the tail wings 13 can effectively ensure the stability of the towed body during movement.

[0041] During operation, the cable 2 and the towing body 1 are affected by the movement of the waves, and their working state is constantly changing, which is manifested in that the towing body 1 swings under the action of the water force, causing the connection between the cable 2 and the towing body 1 to bear a large load. Especially when the tension of the cable 2 is large, the load at the connection between the cable 2 and the towing body 1 is more obvious. Long-term load and wear will inevitably cause local damage and breakage at the connection. In severe cases, the connection between the towing body 1 and the hull is interrupted, causing the towed sonar to fail to work properly. In order to prevent the above-mentioned connection from breaking or being damaged due to load, the following is specially set Figure 1-Figure 3 The radial buffer device 3 is shown.

[0042] A mounting hole is provided at one end of the bow shell 11 away from the stern shell 12, i.e., at the connection between the cable 2 and the towing body 1. A receiving ring 32 is installed inside the mounting hole. The outer diameter and thickness of the receiving ring 32 are respectively adapted to the diameter and depth of the mounting hole. The outer wall of the receiving ring 32 and the side wall of the mounting hole are sealed by welding or integral molding. An annular receiving groove 321 is radially provided on the inner wall of the receiving ring 32. The annular receiving groove 321 is concentric with the receiving ring 32. The receiving groove 321 is provided with a Figure 2 The cylindrical connecting block 31 shown has a thickness that is consistent with the axial width of the receiving groove 321 and the end surface of the connecting block 31 is in smooth contact with both sides of the receiving groove 321, so that the sliding connection between the connecting block 31 and the receiving groove 321 can be achieved and the connection is in a sealed state. It should be particularly emphasized that in this embodiment, the diameter of the connecting block 31 is greater than half of the sum of the inner diameter and the outer diameter of the receiving groove 321, so as to ensure that the connecting block 31 will not be separated from the receiving ring 32 during the sliding process in the receiving groove 321, causing the external water to enter the interior of the towing body 1 along the receiving groove 321, causing damage to the internal instruments.

[0043] A connecting hole is axially opened at the center of the end surface of the connecting block 31, and the end of the cable 2 close to the towing body 1 passes through the connecting hole and extends into the interior of the towing body 1. The cable 2 and the connecting hole are sealed by a gasket or hot melt adhesive.

[0044] An annular protrusion 33 is welded on the outer surface of the connecting block 31. In this embodiment, the inner side of the annular protrusion 33 is consistent with the outer side of the connecting block 31 in size and the two are fitted. The two end surfaces of the annular protrusion 33 gradually shrink inward along the axial direction of the connecting block 31, so that the cross section of the annular protrusion 33 is trapezoidal. A plurality of buffer plates 34 are arranged on both sides of the receiving groove 321, and there is a gap between the buffer plates 34 on both sides. The buffer plates 34 are arranged at intervals along the circumference of the connecting block 31. The buffer plates 34 are located on the outer side of the connecting block 31. One end of the buffer plate 34 is welded to the side wall of the receiving groove 321, and the other end of the buffer plate 34 is inclined toward the annular protrusion 33. It is worth emphasizing that in order to ensure that the buffer plate 34 can be fully deformed under the load of the connecting block 31 to dissipate energy, in this embodiment, on the one hand, the width of the outer side of the annular protrusion 33 is consistent with the gap width between the buffer plates 34 on both sides, and on the other hand, the angle between the buffer plate 34 and the horizontal plane is greater than the angle between the inclined surface of the annular protrusion 33 and the horizontal plane. When the connection block 31 comes into contact with the buffer plate 34 , the contact point between the two is located at the free end of the buffer plate 34 , causing the buffer plate 34 to undergo a large deformation.

[0045] A plurality of elastic support members 35 are arranged between the outer side of the connection block 31 and the side wall of the receiving groove 321. The elastic support members 35 are evenly distributed along the circumferential direction. In this embodiment, the elastic support member 35 is a spring, one end of which is welded to the outer side of the connection block 31, and the other end of which is welded to the side wall of the receiving groove 321. The axis of the spring passes through the center of gravity of the connection block 31. The elastic support members 35 and the buffer plate 34 jointly play an energy dissipation buffering effect on the connection block 31. When the energy dissipation buffering process is completed, the connection block 31 returns to its original position under the action of the elastic support members 35.

[0046] In order to solve the problem of excessive load at the connection between the cable 2 and the towing body 1, a radial buffer device 3 is added, which can effectively reduce the load of the cable 2 at the connection by deforming and consuming energy through the buffer plate 34 and the elastic support member 35, thereby protecting the cable 2 at the connection, preventing it from being damaged or broken, and improving its stability and service life.

[0047] When traction suddenly acts on the cable 2 (such as when the ship starts), the connection of the cable 2 is easily damaged under the sudden load. In order to prevent the sudden load at the moment of the ship starting from damaging the cable 2, an axial buffer device 4 is specially provided.

[0048] like Figure 1As shown, the axial buffer device 4 includes a secondary cable 401 and a fixed body 402 located outside the stern shell 12. The secondary cable 401 and the fixed body 402 are arranged at 90° intervals along the circumferential direction of the towing body 1 to ensure that the buffer effect can be achieved all around the towing body 1. The difference between the secondary cable 401 and the cable 2 is that there is no important cable such as power line and signal line inside the secondary cable 401, and it is only used to bear the tensile load. In addition, in this embodiment, the connection points of the four secondary cables 401 and the cable 2 are located in the same vertical plane, and the secondary cables 401 and the cable 2 are integrally formed.

[0049] like Figure 4-Figure 11 As shown, the main body of the fixed body 402 is rectangular, and one end of the fixed body 402 close to the bow shell 11 is streamlined to reduce resistance. A cavity 403 with a rectangular cross section is opened inside the fixed body 402, and opposite long strip-shaped limiting grooves 404 are opened on both sides of the cavity 403 along the length direction. It should be explained in detail that two limiting grooves 404 are set on either side of the cavity 403, and the two limiting grooves 404 are respectively located at the top and bottom of the cavity 403. A slider 405 with the same cross section as the cavity 403 is provided inside the cavity 403, and limiting protrusions 406 matching the limiting grooves 404 are provided on the top and bottom of the slider 405, so as to realize the sliding connection between the slider 405 and the side wall of the cavity 403.

[0050] One end of the auxiliary cable 401 is connected to the cable 2, and the other end of the auxiliary cable 401 passes through the end surface of the fixed body 402 close to the bow shell 11 and the cavity 403 and is fixedly connected to the outer side of the slider 405. A rubber gasket is provided at the connection between the auxiliary cable 401 and the fixed body 402 to ensure sealing. The connection point between the auxiliary cable 401 and the slider 405 is located at the center of the side of the slider 405. The connection method between the auxiliary cable 401 and the slider 405 is preferably a clamping connection, which is uniform in force and has a strong bearing capacity. A first spring 407 is provided in the horizontal direction between the side of the slider 405 away from the bow shell 11 and the end surface of the cavity 403. Two first springs 407 are provided in the vertical direction and are evenly distributed along the height direction of the slider 405.

[0051] It should be emphasized that, in the present embodiment, when the cable 2 is not subjected to tensile force, the first spring 407 is in a natural state, and the portion of the cable 2 between the connection point of the connecting block 31 and the auxiliary cable 401 is in a bent and relaxed state; when the cable 2 is subjected to a sudden traction force, the auxiliary cable 401 is also subjected to traction force and drives the slider 405 to slide toward the side of the bow shell 11, and the rebound force generated by the stretching of the first spring 407 can buffer the sudden traction force, and when the slider 405 reaches the top position, the portion of the cable 2 between the connection point of the connecting block 31 and the auxiliary cable 401 is transformed from a bent and relaxed state to a straightened tension state, thereby avoiding the sudden traction force directly acting on the connection between the cable 2 and the towing body 1, causing excessive load on the cable 2 at the connection.

[0052] When the traction force disappears suddenly (such as the ship suddenly decelerates or stops), the tension of the cable 2 also disappears synchronously, that is, the load at the connection between the cable 2 and the towing body 1 changes suddenly, which will also have a negative impact on the cable 2 at the connection. In addition, the towing body 1 continues to move toward the ship under its own inertia, which can easily cause the towing body 1 to collide with the ship, causing damage to the towing body 1.

[0053] In order to avoid the above-mentioned adverse consequences, side grooves 413 with triangular cross-sections are provided on both sides of the fixed body 402. The side grooves 413 are gradually concave inwards in the direction away from the bow shell 11. A fixing rod 414 is welded to the end of the side groove 413 away from the bow shell 11 in the vertical direction. The top and bottom ends of the fixing rod 414 are sleeved with a limit ring 415 which is concentric with the fixing rod 414. The outer diameter of the limit ring 415 is larger than the diameter of the fixing rod 414, and the limit ring 415 is integrally formed with the fixing rod 414. A triangular prism-shaped fin 416 is provided in the side groove 413. The size of the fin 416 matches the size of the side groove 413, that is, the inner side surface of the fin 416 fits the inner side surface of the side groove 413, and the outer side surface of the fin 416 is flush with the outer side surface of the fixed body 402. The fin 416 and the side groove 413 are at the same height. The end of the fin 416 is rotatably connected to the limiting ring 415, and a torsion spring 417 is provided between the fixing rod 414 and the fin 416, and the fin 416 is reset by the torsion spring 417. A limiting seat 418 having the same height as the side groove 413 is also provided at one end of the side groove 413 away from the bow shell 11, and the limiting seat 418 can ensure that the maximum rotation angle of the fin 416 is 90° and provide support for the fin 416.

[0054] Both sides of the cavity 403 are provided with Fig. 9The rectangular through hole 408 shown has a height less than the height of the cavity 403, and the distance between the through hole 408 and the end surface of the cavity 403 away from the bow shell 11 is equal to the length of the first spring 407 in the natural state. A first stopper 410 and a second stopper 411 in contact with the inner side of the fin 416 are welded on the side of the through hole 408 away from the cavity 403, and a gap is left between the first stopper 410 and the second stopper 411. A stopper 409 is also provided on the side of the through hole 408 facing the cavity 403. In this embodiment, the stopper 409 includes a first wedge 4091 located on the inside and a second wedge 4092 located on the outside. A portion of the first wedge 4091 extends into the cavity 403 and the portion of the first wedge 4091 extending into the cavity 403 gradually tilts inward in a direction away from the bow shell. The size of the first wedge 4091 matches the size of the through hole 408 and the two are slidably connected. The second wedge 4092 passes through the gap between the first limit block 410 and the second limit block 411 and abuts against the inner side of the fin 416. A second spring 412 is provided between the first limit block 410, the second limit block 411 and the first wedge 4091 to achieve the reset of the stopper 409.

[0055] When the cable 2 suddenly loses traction, the first spring 407 rebounds and drives the slider 405. During the resetting process of the slider 405, it abuts against the block 409, so that the block 409 moves to both sides and pushes the fin 416 away through the second wedge 4092. The fin 416 rotates around the fixing rod 414, and the fin 416 forms an angle with the fixing body 402. The water flow continues to apply pressure to the inner side of the fin 416, so that the angle between the fin 416 and the fixing body 402 is further increased, and the resistance of the towing body 1 is increased through the fin 416, providing a buffer for the towing body 1 while reducing the speed of the towing body 1.

[0056] In this embodiment, a method for using an acoustic compatible towed sonar is also provided, using the above-mentioned acoustic compatible towed sonar, comprising the following steps:

[0057] S1, acquisition of detection signals by towed sonar;

[0058] S2, constructing an ocean environment noise model, where the ocean environment noise model should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including low noise environment, medium noise environment and high noise environment;

[0059] S3, constructing a submarine noise model, where the submarine noise model should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including the radiation noise and self-noise of the submarine;

[0060] S4, constructing a jamming signal source model, where the jamming signal source should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including the acoustic pulses emitted by active acoustic equipment;

[0061] S5, calculating and analyzing the data of each noise source according to the above model, and avoiding the corresponding noise source frequency band obtained by calculation.

[0062] By utilizing the back-end data of the transducer array of this hydroacoustic device and the beam domain data, the acoustic compatibility related to this hydroacoustic device is quantified, including when this hydroacoustic device acts as an interference source, judging whether this hydroacoustic device interferes with other shipborne hydroacoustic devices, and when this hydroacoustic device acts as an interfered device, judging whether other shipborne hydroacoustic devices interfere with this hydroacoustic device; solving the problems of inaccurate interference judgment caused by only observing the interference screen in the past, and unreasonable acoustic compatibility management control measures or acoustic compatibility usage recommendations formulated based on it.

[0063] In addition, by quantitatively analyzing the underwater safety situation under acoustic compatibility conditions, we can quickly evaluate the existing underwater combat force composition, underwater safety defense range, defense capabilities, compatible use and other aspects from the usage level to analyze underwater combat safety and support the formulation of underwater combat plans.

[0064] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An acoustically compatible towed sonar, characterized in that: The towed sonar comprises a towed sonar and a cable connected to the head end of the towed sonar, wherein the towed sonar comprises a hemispherical bow shell and a cylindrical stern shell, a radial buffer device is provided at the connection between the bow shell and the cable, and the radial buffer device is used to realize the circumferential sliding and buffering of the cable at the connection, a plurality of axial buffer devices are evenly distributed along the circumferential direction on the outer surface of the stern shell, a plurality of auxiliary cables are arranged on the cable along the circumferential direction, and the connection points of the plurality of auxiliary cables and the cable are located in the same vertical plane, and the axial buffer device is connected to the The auxiliary cables correspond one to one; the radial buffer device includes a receiving ring located at the head end of the bow shell, a mounting hole is opened at the head end of the bow shell, the receiving ring is adapted to the size of the mounting hole, an annular receiving groove is opened radially on the inner side wall of the receiving ring, the receiving groove is concentric with the receiving ring, a cylindrical connecting block is provided inside the receiving groove, the thickness of the connecting block is consistent with the axial width of the receiving groove and the two are in smooth contact, the diameter of the connecting block is greater than half of the sum of the inner diameter and the outer diameter of the receiving groove, and the center of the end face of the connecting block is A cable is passed through the center position of the connecting block, an annular protrusion is fixedly connected to the outer side surface of the connecting block, a plurality of buffer plates are arranged on both sides of the receiving groove, and a gap is left between the buffer plates on both sides, the buffer plate is located on the outside of the connecting block, and a plurality of elastic support members are evenly arranged along the circumferential direction between the outer side surface of the connecting block and the side wall of the receiving groove, and the axis of the elastic support member passes through the center of gravity of the connecting block; the axial buffer device includes a rectangular fixed body, a cavity with a rectangular cross-section is opened inside the fixed body, and the top and bottom of both sides of the cavity are A limiting groove is arranged along the length direction, a sliding block with the same cross-section as the cavity is arranged inside the cavity, and limiting protrusions matched with the limiting groove are arranged at the upper and lower ends of the sliding block. The free end of the auxiliary cable passes through the end face of the fixed body and is fixedly connected at the center position of the cavity and the side face of the sliding block. A first spring is arranged between the side face of the sliding block facing away from the auxiliary cable and the end face of the cavity. When the first spring is in a natural state, the portion of the cable located between the bow shell and the connection point of the auxiliary cable is in a bent and relaxed state.

2. The acoustically compatible towed sonar according to claim 1, characterized in that: The inner side surface of the annular protrusion is consistent with the outer side surface of the connecting block in size and fits well with each other. The two end surfaces of the annular protrusion gradually shrink inward along the axial direction. The width of the outer side surface of the annular protrusion is consistent with the spacing width between the buffer plates on both sides.

3. The acoustically compatible towed sonar according to claim 2, characterized in that: One end of the buffer plate is fixedly connected to the side wall of the accommodating groove, and the other end of the buffer plate is inclined toward the annular protrusion. The angle between the buffer plate and the horizontal plane is greater than the angle between the end surface of the annular protrusion and the horizontal plane.

4. The acoustically compatible towed sonar according to claim 3, characterized in that: Side grooves with triangular cross-sections are provided on both sides of the fixed body, and the side grooves are gradually concave in the direction away from the bow shell, and a fixing rod is welded to one end of the side groove away from the bow shell in the vertical direction, and triangular prism-shaped fins of equal height are provided in the side grooves, and the inner side surfaces of the fins are in contact with the inner side surfaces of the side grooves, and the outer side surfaces of the fins are flush with the outer side surfaces of the fixed body, and the ends of the fins are rotatably connected to the fixing rods; rectangular through holes are provided on both sides of the cavity, and the height of the through holes is less than the height of the cavity, and the spacing between the through holes and the end surface of one end of the cavity away from the bow shell is equal to the length of the first spring in the natural state, and a first limit block and a second limit block in contact with the inner side surface of the fin are provided on the side of the through hole away from the cavity, and a gap is left between the first limit block and the second limit block, and a stop block is provided on the side of the through hole facing the cavity, and one end of the stop block passes through the gap between the first limit block and the second limit block and abuts against the inner side surface of the fin.

5. The acoustically compatible towed sonar according to claim 4, characterized in that: The top and bottom ends of the fixing rod are both sleeved with limiting rings which are concentric with the fixing rod, the outer diameter of the limiting ring is larger than the diameter of the fixing rod, the fin is rotatably connected to the fixing rod through the limiting ring, and a torsion spring is provided between the fixing rod and the fin.

6. The acoustically compatible towed sonar according to claim 5, characterized in that: The stop block includes a first wedge-shaped body located on the inner side and a second wedge-shaped body located on the outer side, the first wedge-shaped body is slidably connected to the through hole and a portion of the first wedge-shaped body extends into the cavity, the portion of the first wedge-shaped body extending into the cavity gradually tilts inward in a direction away from the bow shell, the second wedge-shaped body is located between the first limit block and the second limit block, and a second spring is provided between the first limit block, the second limit block and the first wedge-shaped body.

7. A method for using an acoustically compatible towed sonar, using the acoustically compatible towed sonar according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, acquisition of detection signals by towed sonar; S2, constructing an ocean environment noise model, where the ocean environment noise model should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including low noise environment, medium noise environment and high noise environment; S3, constructing a submarine noise model, where the submarine noise model should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including the radiation noise and self-noise of the submarine; S4, constructing a jamming signal source model, where the jamming signal source should cover the main operating frequency bands of surface ship sonar, surface vessel sonar and submarine sonar, specifically including the acoustic pulses emitted by active acoustic equipment; S5, calculating and analyzing the data of each noise source according to the above model, and avoiding the corresponding noise source frequency band obtained by calculation.

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