Inter-board rod type array cavity anti-impact energy-absorbing device for underwater equipment

Abstract

The invention discloses an inter-board rod type array cavity anti-impact energy-absorbing device for underwater equipment, relates to the technical field of anti-impact protection of the underwater equipment, and solves the problems that an existing anti-impact energy-absorbing material and structure cannot be repeatedly used, and the performance is obviously reduced under the deepwater condition. A plurality of energy absorption devices are uniformly distributed on a non-pressure-resistant shell of the underwater equipment in an array; the energy absorption device comprises a rigid water-permeable hollowed-out outer frame, a tough cavity shell and a mounting base, the mounting base is arranged on the non-pressure-resistant shell, the rigid water-permeable hollowed-out outer frame is arranged on the mounting base, the surface of the rigid water-permeable hollowed-out outer frame is hollowed out, and the tough cavity shell is arranged in the rigid water-permeable hollowed-out outer frame; and the flexible cavity shell is filled with high-pressure gas. According to the invention, the tough cavity shell is filled with high-pressure gas, so that the effects of no compression and basically unchanged equivalent density under the action of static pressure are realized; when shock waves are received, the tough cavity shell deforms, and the effects of efficiently absorbing energy and blocking momentum transfer are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of underwater equipment anti-impact protection, and in particular to an anti-impact energy absorption device for a sponson-type array cavity of underwater equipment. Background Art

[0002] In terms of impact protection of underwater equipment, due to the compact structure of underwater equipment, it is impossible to lay anti-impact covering layers or lightning protection cabins on a large scale like surface ships. Therefore, the current impact protection design of underwater equipment is mostly focused on the impact isolation of equipment in the cabin. Since most of the domestic underwater equipment currently adopts double hulls or single-double hybrid hulls, by setting up a reasonable energy-absorbing and anti-impact structure in the space between the ships, the impact load can be effectively blocked from being transmitted from the external flow field to the hull structure, thereby improving the overall impact resistance. However, the traditional impact-absorbing materials and structures designed based on the impedance principle usually have the problem of being unable to be reused multiple times or having a significant performance degradation under deep water conditions, resulting in poor protection of underwater equipment against underwater impact. In addition, the traditional impact protection of underwater equipment has a low utilization rate of the space inside the boat, and cannot make full use of the radial space between the pressure hull and the non-pressure hull. Therefore, the design can be flexibly arranged in the space between the ships, and has good process, maintainability, and deep water adaptability, and is reusable and has little impact on other performance. The impact-absorbing technology and device are of great significance. Summary of the invention

[0003] In order to solve the above-mentioned problem that the existing impact-resistant energy-absorbing materials and structures designed based on the impedance principle cannot be reused multiple times and their performance decreases significantly under deep water conditions, the present invention proposes an impact-resistant energy-absorbing device for underwater equipment between-side rod array cavities. The present invention fully considers the constraints of the compact structure of underwater equipment and the tight space in the boat, and provides an underwater equipment between-side rod array cavity impact-resistant energy-absorbing device with good deep water adaptability and reasonable use of the space between the underwater equipment.

[0004] The present invention proposes an anti-impact energy absorption device for a side-rod array cavity of underwater equipment, which specifically comprises a plurality of energy absorption devices, which are evenly distributed in an array on the non-pressure hull of the underwater equipment; the energy absorption device comprises a rigid water-permeable hollow outer frame, a tough cavity outer shell and a mounting base, the mounting base is arranged on the non-pressure hull, the mounting base is provided with a rigid water-permeable hollow outer frame, the surface of the rigid water-permeable hollow outer frame is hollowed out and a tough cavity outer shell is arranged inside; the rigid water-permeable hollow outer frame and the tough cavity outer shell are integrally formed into a columnar structure, with the end pointing to the pressure hull of the underwater equipment.

[0005] Furthermore, the rigid water-permeable hollow outer frame is a rectangular shell with a bottom plate at the bottom and an opening at the top; one side of the bottom plate is connected to the mounting base, and the other side is connected to the tough cavity shell; a number of rectangular windows are provided on the four sides of the rigid water-permeable hollow outer frame.

[0006] Furthermore, the rectangular windows are arranged in a matrix on the side of the rigid water-permeable hollow outer frame.

[0007] Furthermore, two opposite side surfaces of the tough cavity shell are corrugated structures, and the other two opposite side surfaces are straight wall surfaces.

[0008] Furthermore, the tough cavity shell is a hollow structure with gas arranged inside.

[0009] Furthermore, the tough cavity shell is made of metal.

[0010] The beneficial effects of the anti-impact energy absorption device for the underwater equipment crossbar array cavity described in the present invention are:

[0011] (1) The impact-absorbing device for the crossbar array cavity of underwater equipment described in the present invention overcomes the problem that the existing impact-absorbing materials and structures designed based on the impedance principle cannot be reused and their performance decreases significantly under deep water conditions. The rigid permeable hollow outer frame constrains the tough cavity shell, and the tough cavity shell is filled with high-pressure gas, which can achieve the effect of no compression under static pressure and maintaining the equivalent density basically unchanged; when subjected to shock waves in the water, the tough cavity shell deforms, converts the fluid momentum induced by the shock wave into a direction perpendicular to the propagation of the shock wave, and forms a sparse wave that propagates in the opposite direction, thereby achieving efficient energy absorption and blocking momentum transfer; it is suitable for underwater equipment with great diving depth, can significantly reduce the shock spectrum velocity in the mid-frequency band, and has the advantage of repeated use, which can better meet the impact protection requirements of underwater equipment;

[0012] (2) The present invention relates to an anti-impact energy absorption device for a crossbar array cavity of underwater equipment. The tough cavity shell is made of high-toughness metal, and the energy absorption performance does not decrease when subjected to multiple impacts. The cavity structure of the tough cavity shell can be specifically designed according to different anti-impact targets.

[0013] (3) The anti-impact and energy-absorbing device for the underwater equipment between-ship rod-type array cavity described in the present invention fully utilizes the radial space between the ships, has a flexible layout, and is easy to replace and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0015] In the attached picture:

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a crossbar array cavity anti-impact energy absorption device for underwater equipment according to the present invention;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of a tough cavity shell for an underwater equipment crossbar array cavity impact resistance and energy absorption device according to the present invention;

[0018] Figure 3 It is a top view of a crossbar array cavity anti-impact energy absorption device for underwater equipment according to the present invention;

[0019] Figure 4 It is a structural schematic diagram of a cross-board rod-type array cavity anti-impact energy absorption device for underwater equipment according to the present invention, which is arranged at the cross-board of underwater equipment;

[0020] Figure 5 It is an ideal response curve diagram of an anti-impact energy absorption device for a crossbar array cavity of underwater equipment to external pressure according to the present invention;

[0021] Among them: 1-rigid permeable hollow outer frame, 2-tough cavity outer shell, 3-installation base, 4-non-pressure hull, 5-underwater equipment covering layer, 6-pressure hull. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0025] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Specific implementation method 1: See Figure 1-Figure 5 The present embodiment is described in detail. The present embodiment describes a device for absorbing energy from impact in a crossbar array cavity of underwater equipment, which specifically includes a plurality of energy absorbing devices, which are evenly distributed in an array between the non-pressure hull 4 and the pressure hull 6 of the underwater equipment, the bottom of the energy absorbing device is connected to the non-pressure hull 4, and the top faces the pressure hull 6; the energy absorbing device includes a rigid water-permeable hollow outer frame 1, a tough cavity shell 2, and a mounting base 3, the mounting base 3 is disposed on the non-pressure hull 4, and a rigid water-permeable hollow outer frame 1 is disposed on the mounting base 3, the surface of the rigid water-permeable hollow outer frame 1 is hollowed out, and a tough cavity shell 2 is disposed inside; the rigid water-permeable hollow outer frame 1 and the tough cavity shell 2 are integrally formed into a columnar structure, with the end pointing to the pressure hull 6 of the underwater equipment, such as Figure 4 shown.

[0027] The rigid water-permeable hollow outer frame 1 is a rectangular shell with a rigid bottom plate at the bottom, an opening at the top, a hollow interior, and a tough cavity shell 2 arranged in the hollow structure; one side of the bottom plate is connected to the mounting base 3 by bolts or welding, and the other side is connected to the tough cavity shell 2 by welding; a plurality of rectangular windows are arranged on the four sides of the rigid water-permeable hollow outer frame 1, and the rectangular windows are arranged in a matrix on the side of the rigid water-permeable hollow outer frame 1.

[0028] The two opposite sides of the tough cavity shell 2 are corrugated structures, and the other two opposite sides are flat walls. The four sides of the tough cavity shell 2 are in contact with the rigid permeable hollow outer frame 1, and the top surface is a flat surface. Figure 2 and Figure 3 shown.

[0029] The tough cavity shell 2 is a sealed structure, hollow inside, and is provided with high-pressure gas inside. The gas internal pressure is adjusted according to the designed water depth, and the size is equal to the static pressure of the designed water depth. After the high-pressure gas is filled, the equivalent density inside the tough cavity shell 2 remains basically unchanged. The tough cavity shell 2 is made of metal and has good energy absorption performance.

[0030] Figure 5The figure shows the ideal response curve of the anti-shock energy absorption device for the underwater equipment crossbar array cavity of the present invention to the external pressure. In the figure, the pressure inside the tough cavity shell 2 is equal to the static pressure of the designed water depth. When the pressure outside the tough cavity shell 2 is less than or equal to the air pressure inside the tough cavity shell 2, the equivalent density inside the tough cavity shell 2 is at the plateau in the figure. At this moment, the equivalent density inside the cavity is the initial state value of 1000 kg / m3. As the shock wave acts on the tough cavity shell 2, the tough cavity shell 2 is deformed, the gas inside it is compressed, the equivalent density increases, and the pressure inside the cavity increases.

[0031] The specific principle and use method of the anti-impact energy absorption device for the underwater equipment crossbar array cavity described in the present invention are:

[0032] The present invention is based on the principle of conservation of momentum. Since the output momentum passing through the rear of the system is equal to the difference between the momentum of the incident shock wave and the reflected wave, in order to minimize the output momentum of the system, it is necessary to reasonably design the inter-ship structure to enhance the reflected rarefaction wave, thereby achieving the effect of reducing the incident shock wave transmitted to the underwater equipment structure.

[0033] When the underwater equipment is subjected to an underwater shock wave at a specified water depth, the shock wave is transmitted through the water from the underwater equipment covering layer 5 laid on the outer surface of the underwater equipment to the non-pressure hull 4 of the underwater equipment, and finally transmitted to the rod-type cavity composed of the rigid permeable hollow outer frame 1 and the tough cavity shell 2 through the mounting base 3. In the above process, due to the compression energy absorption of the rod-type cavity, the fluid momentum induced by the shock wave is converted to a direction perpendicular to the propagation of the shock wave, and a sparse wave propagating in the opposite direction is formed, achieving efficient energy absorption and blocking momentum transfer, forming an energy absorption and shock resistance technology of a rod-type cavity with nonlinear compression. According to the working water depth of the underwater equipment, high-pressure gas is filled into the tough cavity shell 2 in advance. The high-pressure gas will form a nonlinear external pressure response characteristic under the constraint of the rigid permeable hollow outer frame 1, so that the tough cavity shell 2 is compressed under the underwater impact pressure greater than the internal gas pressure, and continuously absorbs the underwater shock wave energy during the compression process, thereby realizing the protection of the underwater equipment structure. Under the static water pressure of the normal operation of the underwater equipment, the high-pressure gas internal pressure of the tough metal cavity shell 2 ensures that it is not compressed and keeps the gas inside the tough metal cavity shell 2 at a stable equivalent density.

[0034] The tough cavity shell 2 can change the shape of its cavity shell side wall according to the actual impact resistance target, and the rigid water-permeable hollow outer frame also changes shape accordingly.

[0035] The dimensions of the rigid water-permeable hollow outer frame 1 and the tough cavity outer shell 2 are adapted to the dimensions of the space between the sides of the hull and are adjusted according to the actual working environment.

[0036] To summarize the above implementation cases, the anti-impact and energy-absorbing device for the crossbar array cavity of underwater equipment described in the present invention overcomes the problems that the existing anti-impact and energy-absorbing materials and structures designed based on the impedance principle usually cannot be reused and their performance decreases significantly under deep water conditions. The rigid permeable hollow outer frame 1 constrains the tough cavity shell 2, and the tough cavity shell 2 is filled with high-pressure gas, which can achieve the effect of no compression under static pressure and maintaining the equivalent density basically unchanged; when subjected to a shock wave in water, the tough cavity shell 2 is deformed, converting the fluid momentum induced by the shock wave into a direction perpendicular to the propagation of the shock wave, and forming a sparse wave that propagates in the opposite direction, thereby achieving It can efficiently absorb energy and block momentum transfer; it is suitable for underwater equipment at a large diving depth, can significantly reduce the impact spectrum velocity in the mid-frequency band, and has the advantage of repeated use, and can better meet the impact protection requirements of underwater equipment; the anti-impact energy absorption device for the cross-board rod type array cavity of underwater equipment described in the present invention, the tough cavity shell 2 adopts high-toughness metal, and the energy absorption performance does not decrease when subjected to multiple impacts, and the cavity structure of the tough cavity shell 2 can be specifically designed according to different impact resistance targets; the anti-impact energy absorption device for the cross-board rod type array cavity of underwater equipment described in the present invention makes full use of the radial space between the ships, has a flexible layout, and is easy to replace and maintain.

[0037] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the invention. It can also be a reasonable combination of the features recorded in the above implementation methods. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-impact energy absorption device for a crossbar array cavity of underwater equipment, characterized in that: The invention comprises a plurality of energy absorbing devices, which are evenly distributed in an array on a non-pressure hull (4) of an underwater equipment; the energy absorbing devices comprise a rigid water-permeable hollow outer frame (1), a tough cavity outer shell (2) and a mounting base (3); the mounting base (3) is arranged on the non-pressure hull (4); the mounting base (3) is provided with a rigid water-permeable hollow outer frame (1); the surface of the rigid water-permeable hollow outer frame (1) is hollowed out and a tough cavity outer shell (2) is arranged inside; the rigid water-permeable hollow outer frame (1) and the tough cavity outer shell (2) are integrally formed into a columnar structure, with the ends pointing to the pressure hull (6) of the underwater equipment.

2. The anti-impact energy absorption device for the underwater equipment crossbar array cavity according to claim 1, characterized in that: The rigid water-permeable hollow outer frame (1) is a rectangular parallelepiped shell, with a bottom plate at the bottom and an opening at the top; one side of the bottom plate is connected to the mounting base (3), and the other side is connected to the tough cavity shell (2); a plurality of rectangular windows are provided on the four sides of the rigid water-permeable hollow outer frame (1).

3. The anti-impact energy absorption device for the underwater equipment crossbar array cavity according to claim 2, characterized in that: The rectangular windows are arranged in a matrix on the side of the rigid water-permeable hollow outer frame (1).

4. The anti-impact energy absorption device for the underwater equipment crossbar array cavity according to claim 1, characterized in that: Two opposite side surfaces of the tough cavity shell (2) are of corrugated structure, and the other two opposite side surfaces are of straight wall surfaces.

5. The anti-impact energy absorption device for the underwater equipment crossbar array cavity according to claim 4, characterized in that: The tough cavity shell (2) is a hollow structure with gas arranged inside.

6. The anti-impact energy absorption device for the underwater equipment crossbar array cavity according to claim 5, characterized in that: The tough cavity shell (2) is made of metal.

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