Ship-borne transducer vibration isolation platform based on rigidity compensation and eddy current damping

Abstract

The ship-borne transducer vibration isolation platform comprises a load platform, a mounting shell and a vibration isolator main body, a mounting cavity is formed in the mounting shell, the vibration isolator main body is arranged in the mounting cavity, the upper end of the vibration isolator main body extends upwards from an opening in the upper end of the mounting cavity and is fixedly connected with the load platform, and the upper end of the vibration isolator main body is fixedly connected with the load platform. The lower end of the vibration isolator main body is fixed on the mounting shell; the vibration isolator body comprises a rigidity compensation element, a damping adjusting element and a connecting element, the rigidity compensation element comprises a plane polygon spring and a diaphragm spring, the damping adjusting element comprises a copper pipe and a permanent magnet, and the connecting element comprises an upper connecting rod and a lower connecting rod; the vertical rigidity of the polygonal spring is larger than the horizontal rigidity, and the horizontal rigidity of the diaphragm spring is larger than the vertical rigidity. The problem of insufficient rigidity caused by size limitation can be solved so as to adapt to the working condition of large-angle inclination, and the adjustment of system damping is realized by utilizing an eddy current damping effect so as to improve the suppression of a resonance peak value.

Description

Technical Field

[0001] The invention relates to the technical field of ship vibration reduction, and in particular to a shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping. Background Art

[0002] Shipboard transducers are one of the important equipment in underwater acoustic warfare technology. Their performance and stability are related to the survivability and combat initiative of ships. However, when a ship is sailing, the vibrations generated by waves and other equipment are transmitted to the transducers through the hull structure, which has a great impact on the stability and service life of the transducers. Therefore, it is very necessary to design a high-performance vibration isolation platform based on the actual working conditions of shipboard transducers.

[0003] Chinese patent document CN107869543B provides a vibration isolation device based on magnetorheological fluid for shipborne equipment, which provides stiffness through a wire rope vibration isolator and adjustable damping through a magnetorheological fluid damper. By adjusting the output current of the magnetorheological fluid damper, different system damping can be obtained to improve the vibration isolation effect of the vibration isolation device. However, the vibration isolation device does not consider the problems of large angle inclination and small space size during multi-dimensional steering operation, and cannot adapt to harsh and complex working conditions. Summary of the invention

[0004] The purpose of the present invention is to provide a shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping, which can solve the problem of insufficient stiffness caused by size limitation, adapt to the working conditions of large angle inclination, and utilize the eddy current damping effect to adjust the system damping to improve the suppression of resonance peak.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping, comprising a load platform, a mounting shell and a vibration isolator body, wherein a mounting cavity is provided inside the mounting shell, the vibration isolator body is arranged in the mounting cavity, the upper end of the vibration isolator body extends upward from the upper end opening of the mounting cavity and is fixedly connected to the load platform, the lower end of the vibration isolator body is fixed to the mounting shell, the load platform is used to be connected to the shipborne transducer, and the mounting shell is used to be connected to the ship body;

[0007] The vibration isolator body includes a stiffness compensation element, a damping adjustment element and a connecting element, the stiffness compensation element includes a plane polygonal spring and a diaphragm spring, the damping adjustment element includes a copper tube and a permanent magnet, and the connecting element includes an upper connecting rod and a lower connecting rod;

[0008] The vertical stiffness of the polygonal spring is greater than the horizontal stiffness, the horizontal stiffness of the diaphragm spring is greater than the vertical stiffness, the upper side of the polygonal spring is fixedly connected to the load platform, the lower side of the polygonal spring is fixedly connected to the mounting shell, the upper end of the upper connecting rod is fixed to the upper side of the polygonal spring, the lower end of the upper connecting rod extends into the inner cavity of the polygonal spring and is fixedly connected to the upper end of the lower connecting rod, the lower end of the lower connecting rod is fixedly connected to the permanent magnet, the copper tube is sleeved outside the lower connecting rod and the permanent magnet, the lower end of the copper tube is fixed to the lower side of the polygonal spring, the diaphragm spring is arranged horizontally, the diaphragm spring is installed between the upper connecting rod and the lower connecting rod, and the two ends of the diaphragm spring are respectively fixed to the two sides of the upper end of the copper tube.

[0009] Preferably, the installation shell includes a front panel, a rear panel and a main shell, the front panel is fixed to the front side of the main shell, the rear panel is fixed to the rear side of the main shell, and the installation cavity is formed between the front panel, the rear panel and the main shell.

[0010] Preferably, the main shell includes a base and two side beams, the two side beams are symmetrically fixed to two sides of the base, and the upper ends of the two side beams protrude from the upper end surfaces of the front panel and the rear panel.

[0011] Preferably, the polygonal spring is a hexagonal spring, and both ends of the hexagonal spring in the transverse direction are symmetrical to each other. Both ends of the hexagonal spring in the transverse direction respectively have a convex structure, and a hollow pattern is provided in the convex structure.

[0012] Preferably, the diaphragm spring is a rectangular sheet structure, and the upper and lower surfaces of the diaphragm spring are provided with bumps.

[0013] Preferably, an upper mounting plate is fixed to the upper end of the copper tube, and a lower mounting plate is fixed to the lower end. Threaded holes are provided at both ends of the upper mounting plate for mounting the diaphragm spring by bolts. The inner cavity of the copper tube serves as the movement cavity of the permanent magnet. Through holes are evenly distributed on the circumferential surface of the copper tube for drainage. Mounting holes are provided at both ends of the lower mounting plate for connecting the polygonal spring by bolts.

[0014] Preferably, the upper connecting rod is in a stepped structure, with a countersunk through hole at the upper end for connecting the polygonal spring by bolts, and a threaded hole at the lower end for threaded connection with the upper end of the lower connecting rod;

[0015] The lower connecting rod is in a cylindrical structure, the upper end of which is a threaded rod for threaded connection with the threaded hole at the lower end of the upper connecting rod, and the lower end of which is provided with a threaded hole for fastening the permanent magnet by bolt connection.

[0016] Preferably, the permanent magnet is composed of a plurality of magnet blocks.

[0017] Preferably, the base is an arc-shaped structure, the side beams are a rectangular long strip structure, the side beams are fixedly connected to the base by bolts, the lower end surfaces of the front panel and the rear panel are arc-shaped surfaces that cooperate with the base, the upper end surfaces of the front panel and the rear panel are planes and the two are coplanarly arranged, and the front panel and the rear panel are fixed to the two side beams by bolts.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The vibration isolation platform provided by the present invention uses polygonal springs as main stiffness elements. Different system stiffnesses can be obtained by optimizing the shape and size of the polygonal springs according to actual working conditions, thereby achieving widening of the vibration isolation bandwidth.

[0020] The vibration isolation platform provided by the present invention uses a diaphragm spring as a stiffness compensation element, which can compensate for the low level stiffness of the polygonal spring, ensure the adaptability of the vibration isolation platform to large angle inclinations, and at the same time solve the limitation of the polygonal spring on the radial size, thereby reducing the R&D cost.

[0021] The vibration isolation platform provided by the present invention uses eddy current damping as a damping adjustment element. Different system damping can be obtained according to actual working conditions by optimizing the shape and size of the permanent magnet and the copper tube and the configuration of the permanent magnet, thereby achieving suppression of the resonance peak.

[0022] The vibration isolation platform of the present invention has a simple structure, stable performance, low cost and good vibration isolation effect.

[0023] Furthermore, the vibration isolation platform provided by the present invention uses the protruding structures at both ends of the hexagonal spring and the upper end of the side beam as lateral limiters and vertical limiters respectively, ensuring the safety and stability of the shipborne transducer and the vibration isolation platform when subjected to a large impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the installation of the vibration isolation platform, the ship body, and the shipborne transducer in an embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of the vibration isolation platform in an embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the load platform structure of the vibration isolation platform in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the front panel structure of the vibration isolation platform in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the rear panel structure of the vibration isolation platform in an embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the main shell structure of the vibration isolation platform in an embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the side beam structure of the vibration isolation platform in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the base structure of the vibration isolation platform in an embodiment of the present invention;

[0033] Fig. 9 Schematic diagram of the main structure of the vibration isolator of the vibration isolation platform in an embodiment of the present invention;

[0034] Fig.10 Schematic diagram of a polygonal spring structure of a vibration isolation platform in an embodiment of the present invention;

[0035] Fig.11 Schematic diagram of the diaphragm spring structure of the vibration isolation platform in an embodiment of the present invention;

[0036] Fig.12 Schematic diagram of the upper connecting rod structure of the vibration isolation platform in an embodiment of the present invention;

[0037] Fig.13 Schematic diagram of the lower connecting rod structure of the vibration isolation platform in an embodiment of the present invention;

[0038] Fig.14 This is a schematic diagram of the copper tube structure of the vibration isolation platform in an embodiment of the present invention;

[0039] Fig.15 Schematic diagram of the permanent magnet structure of the vibration isolation platform in an embodiment of the present invention;

[0040] Fig.16 Schematic diagram of the working mechanism of the vibration isolation platform in the embodiment of the present invention;

[0041] Fig.17 1 is a vibration isolation performance curve of the vibration isolation platform under different stiffness and damping conditions in the embodiment of the present invention.

[0042] In the figure: 1-shipborne transducer, 2-vibration isolation platform, 21-load platform, 22-vibration isolator body, 221-upper connecting rod, 222-polygonal spring, 2221-protruding structure, 2222-hollow pattern, 223-diaphragm spring, 2231-bump, 224-lower connecting rod, 225-copper tube, 2251-through hole, 226-permanent magnet, 227-upper mounting plate, 228-lower mounting plate, 23-front panel, 24-rear panel, 25-main shell, 251-side beam, 252-base, 3-ship body. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The purpose of the present invention is to provide a shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping, which can solve the problem of insufficient stiffness caused by size limitation, adapt to the working conditions of large angle inclination, and utilize the eddy current damping effect to adjust the system damping to improve the suppression of resonance peak.

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figure 1-Figure 15 As shown, this embodiment provides a shipborne transducer vibration isolation platform 2 based on stiffness compensation and eddy current damping, wherein the vibration isolation platform 2 is installed between the shipborne transducer 1 and the ship body 3, and is used to suppress the influence of vibration on the shipborne transducer 1. The vibration isolation platform 2 is connected to the shipborne transducer 1 and the ship body 3 respectively by bolts and nuts.

[0047] The vibration isolation platform 2 described in this embodiment includes a load platform 21, a mounting shell and a vibration isolator body 22. A mounting cavity is provided inside the mounting shell. The vibration isolator body 22 is arranged in the mounting cavity to protect the vibration isolator body 22. The upper end of the vibration isolator body 22 extends upward from the upper end opening of the mounting cavity and is fixedly connected to the load platform 21. The lower end of the vibration isolator body 22 is fixed to the mounting shell. The load platform 21 is used to connect with the shipborne transducer 1, and the mounting shell is used to connect with the ship body 3.

[0048] The vibration isolator body 22 includes a stiffness compensation element, a damping adjustment element and a connecting element. The stiffness compensation element includes a plane polygonal spring 222 and a diaphragm spring 223. The damping adjustment element includes a copper tube 225 and a permanent magnet 226. The connecting element includes an upper connecting rod 221 and a lower connecting rod 224.

[0049] The vertical stiffness of the polygonal spring 222 is greater than the horizontal stiffness, and the horizontal stiffness of the diaphragm spring 223 is greater than the vertical stiffness. The vertical stiffness described in this article refers to the stiffness in the vertical direction, and the horizontal stiffness refers to the stiffness in the horizontal direction. The upper side of the polygonal spring 222 is fixedly connected to the load platform 21 by screws, and the lower side of the polygonal spring 222 is fixedly connected to the mounting housing by screws. The upper end of the upper connecting rod 221 is fixed to the upper side of the polygonal spring 222, and the lower end of the upper connecting rod 221 is fixedly connected to the upper side of the polygonal spring 222. It extends into the inner cavity of the polygonal spring 222 and is fixedly connected to the upper end of the lower connecting rod 224. The lower end of the lower connecting rod 224 is fixedly connected to the permanent magnet 226. The copper tube 225 is sleeved outside the lower connecting rod 224 and the permanent magnet 226. The lower end of the copper tube 225 is fixed to the bottom of the polygonal spring 222. The diaphragm spring 223 is arranged horizontally. The diaphragm spring 223 is installed between the upper connecting rod 221 and the lower connecting rod 224. The two ends of the diaphragm spring 223 are respectively fixed to the two sides of the upper end of the copper tube 225.

[0050] In this embodiment, the installation shell includes a front panel 23, a rear panel 24 and a main shell 25. The front panel 23 is fixed to the front side of the main shell 25, and the rear panel 24 is fixed to the rear side of the main shell 25. An installation cavity is formed between the front panel 23, the rear panel 24 and the main shell 25.

[0051] In this embodiment, the main housing 25 includes a base 252 and two side beams 251, the two side beams 251 are symmetrically fixed on both sides of the base 252, and the upper ends of the two side beams 251 protrude from the upper end surfaces of the front panel 23 and the rear panel 24. When subjected to a large impact in the vertical direction, the load platform 21 can be limited, playing a vertical limiting role, and ensuring the safety and stability of the shipborne transducer 1 and the vibration isolation platform 2 when subjected to a large impact.

[0052] In this embodiment, the polygonal spring 222 is a hexagonal spring, and the two ends of the hexagonal spring in the transverse direction are symmetrical to each other. The two ends of the hexagonal spring in the transverse direction respectively have a protruding structure 2221, and a hollow pattern 2222 is provided in the protruding structure 2221. The setting of the hollow pattern 2222 can reduce the horizontal rigidity, play a role in lateral limit and buffering, and can also be used as an anti-plagiarism mark. The hollow design in this embodiment is "H" shaped.

[0053] In this embodiment, the diaphragm spring 223 is a rectangular sheet structure with two symmetrical ends in the length direction. The upper and lower surfaces of the diaphragm spring 223 are provided with protrusions 2231 for increasing the horizontal rigidity.

[0054] In this embodiment, the load platform 21 is a stepped structure with threaded holes on both sides, and the threaded holes are used to connect the shipborne transducer 1 and the vibration isolator body 22 .

[0055] In this embodiment, an upper mounting plate 227 is fixed to the upper end of the copper tube 225, and a lower mounting plate 228 is fixed to the lower end. Threaded holes are provided at both ends of the upper mounting plate 227 for mounting the diaphragm spring 223 by bolts. The inner cavity of the copper tube 225 serves as the movement cavity of the permanent magnet 226. Through holes 2251 are evenly distributed on the circumferential surface of the copper tube 225 for drainage. Mounting holes are provided at both ends of the lower mounting plate 228 for connecting the polygonal spring 222 by bolts.

[0056] In this embodiment, the upper connecting rod 221 is a stepped structure, with a countersunk through hole at the upper end for connecting the polygonal spring 222 by bolts, and a threaded hole at the lower end for threaded connection with the upper end of the lower connecting rod 224;

[0057] The lower connecting rod 224 is a cylindrical structure, with an upper end being a threaded rod for threaded connection with a threaded hole at the lower end of the upper connecting rod 221 , and a lower end having a threaded hole for fastening the permanent magnet 226 by bolt connection.

[0058] In this embodiment, the permanent magnet 226 is composed of a plurality of magnet blocks.

[0059] In this embodiment, the base 252 is an arc-shaped structure, and the side beam 251 is a rectangular long strip structure. The side beam 251 is fixedly connected to the base 252 by bolts. The lower end surfaces of the front panel 23 and the rear panel 24 are arc-shaped surfaces that cooperate with the base 252. The upper end surfaces of the front panel 23 and the rear panel 24 are planes and the two are coplanarly arranged. The front panel 23 and the rear panel 24 are fixed to the two side beams 251 by bolts.

[0060] The polygonal spring 222 described in this embodiment provides the main system stiffness for the vibration isolation platform 2, and its vertical stiffness is greater than the horizontal stiffness. According to actual needs, the shape, size and material of the polygonal spring 222 in this embodiment can be changed to obtain different vertical stiffnesses and achieve different vibration isolation bandwidths.

[0061] The diaphragm spring 223 in this embodiment provides horizontal stiffness compensation for the polygonal spring 222, and its horizontal stiffness is greater than the vertical stiffness, and the two are installed in parallel. According to actual needs, the thickness, surface protrusions and materials of the diaphragm spring 223 in this embodiment can be changed to compensate for the horizontal stiffness of the vibration isolation platform without affecting the vertical vibration isolation performance, so as to adapt to the harsh working conditions of large-angle inclination.

[0062] The copper tube 225 and the permanent magnet 226 described in this embodiment are used as eddy current damping adjustment elements, and the upper connecting rod 221 and the lower connecting rod 224 are used as supporting elements of the permanent magnet 226. When subjected to external vibration excitation, the copper tube 225 and the permanent magnet 226 produce relative motion. Due to the electromagnetic induction effect, an induced current is generated in the copper tube 225, thereby generating eddy current damping, consuming vibration energy, and hindering the relative motion between the two. The permanent magnet 226 can adopt different configurations to enhance the surrounding magnetic field and thus improve the eddy current damping effect. The configuration adopted in this embodiment is only one of them.

[0063] The working principle of the vibration isolation platform of the present invention is as follows:

[0064] When the vibration excitation of the ship body 3 is transmitted to the vibration isolation platform 2, the system stiffness provided by the polygonal spring 222 and the eddy current damping provided by the copper tube 225 and the permanent magnet 226 will suppress the transmission of vibration to the shipborne transducer 1; when subjected to a large-amplitude impact, the upper end of the side beam 251 provides vertical limitation, and the two ends of the polygonal spring 222 provide lateral limitation; when encountering a large-angle tilt condition, the large horizontal stiffness provided by the diaphragm spring 223 will compensate for the horizontal stiffness of the polygonal spring 222.

[0065] like Fig.16 As shown, the vibration isolation platform of the present invention can be equivalent to a mass-spring-damper system, and its transfer function is:

[0066]

[0067] The above formula belongs to the complex domain, where X i is the displacement response of the shipborne transducer 1 after being disturbed by the vibration signal, X o is the excitation displacement of the main shell 25 caused by the vibration interference signal, M is the mass of the shipborne transducer 1, C is the system damping of the vibration isolation platform (mainly provided by structural damping and eddy current damping), K is the system stiffness of the vibration isolation platform (mainly provided by polygonal spring 222 and diaphragm spring 223), and s is a complex variable in Laplace transform.

[0068] like Fig.17 As shown, the vibration isolation platform of the present invention is a passive vibration isolation. By optimizing the design of the copper tube 225 and the permanent magnet 226, the system damping is increased, and the suppression of the resonance peak can be improved; by optimizing the design of the polygonal spring 222 and the diaphragm spring 223, the system stiffness is reduced, and the vibration isolation bandwidth can be widened; by increasing the system damping and reducing the system stiffness at the same time, the effect of suppressing the resonance peak and widening the vibration isolation bandwidth can be achieved at the same time. According to the actual situation and the configuration and mechanism described in the present invention, a vibration isolation platform with different system damping and system stiffness can be designed.

[0069] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping, characterized in that: It comprises a load platform, a mounting shell and a vibration isolator body, wherein a mounting cavity is provided inside the mounting shell, the vibration isolator body is arranged in the mounting cavity, the upper end of the vibration isolator body extends upward from the upper end opening of the mounting cavity and is fixedly connected to the load platform, the lower end of the vibration isolator body is fixed to the mounting shell, the load platform is used to be connected to a shipborne transducer, and the mounting shell is used to be connected to a ship body; The vibration isolator body includes a stiffness compensation element, a damping adjustment element and a connecting element, the stiffness compensation element includes a plane polygonal spring and a diaphragm spring, the damping adjustment element includes a copper tube and a permanent magnet, and the connecting element includes an upper connecting rod and a lower connecting rod; The vertical stiffness of the polygonal spring is greater than the horizontal stiffness, the horizontal stiffness of the diaphragm spring is greater than the vertical stiffness, the upper side of the polygonal spring is fixedly connected to the load platform, the lower side of the polygonal spring is fixedly connected to the mounting shell, the upper end of the upper connecting rod is fixed to the upper side of the polygonal spring, the lower end of the upper connecting rod extends into the inner cavity of the polygonal spring and is fixedly connected to the upper end of the lower connecting rod, the lower end of the lower connecting rod is fixedly connected to the permanent magnet, the copper tube is sleeved outside the lower connecting rod and the permanent magnet, the lower end of the copper tube is fixed to the lower side of the polygonal spring, the diaphragm spring is arranged horizontally, the diaphragm spring is installed between the upper connecting rod and the lower connecting rod, and the two ends of the diaphragm spring are respectively fixed to the two sides of the upper end of the copper tube.

2. The shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping according to claim 1 is characterized in that: The installation shell includes a front panel, a rear panel and a main shell, the front panel is fixed to the front side of the main shell, the rear panel is fixed to the rear side of the main shell, and the installation cavity is formed between the front panel, the rear panel and the main shell.

3. The shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping according to claim 2 is characterized in that: The main shell includes a base and two side beams, the two side beams are symmetrically fixed on both sides of the base, and the upper ends of the two side beams protrude from the upper end surfaces of the front panel and the rear panel.

4. The shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping according to claim 1, characterized in that: The polygonal spring is a hexagonal spring, and both ends of the hexagonal spring in the transverse direction are symmetrical to each other. Both ends of the hexagonal spring in the transverse direction have a convex structure, and a hollow pattern is arranged in the convex structure.

5. The shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping according to claim 1 is characterized in that: The diaphragm spring is a rectangular sheet structure, and the upper and lower surfaces of the diaphragm spring are provided with protrusions.

6. The shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping according to claim 1, characterized in that: An upper mounting plate is fixed to the upper end of the copper tube, and a lower mounting plate is fixed to the lower end. Threaded holes are provided at both ends of the upper mounting plate for mounting the diaphragm spring by bolts. The inner cavity of the copper tube serves as the movement cavity of the permanent magnet. Through holes are evenly distributed on the circumferential surface of the copper tube for drainage. Mounting holes are provided at both ends of the lower mounting plate for connecting the polygonal spring by bolts.

7. The shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping according to claim 1, characterized in that: The upper connecting rod is in a stepped structure, with a countersunk through hole at the upper end for connecting the polygonal spring with bolts, and a threaded hole at the lower end for threaded connection with the upper end of the lower connecting rod; The lower connecting rod is in a cylindrical structure, the upper end of which is a threaded rod for threaded connection with the threaded hole at the lower end of the upper connecting rod, and the lower end of which is provided with a threaded hole for fastening the permanent magnet by bolt connection.

8. The shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping according to claim 1, characterized in that: The permanent magnet is composed of a plurality of magnet blocks.

9. The shipborne transducer vibration isolation platform based on stiffness compensation and eddy current damping according to claim 3 is characterized in that: The base is an arc-shaped structure, and the side beams are a rectangular long strip structure. The side beams are fixedly connected to the base by bolts. The lower end surfaces of the front panel and the rear panel are arc-shaped surfaces that cooperate with the base. The upper end surfaces of the front panel and the rear panel are planes and are coplanarly arranged. The front panel and the rear panel are fixed to the two side beams by bolts.

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