An underwater explosion test device for use in ultra-gravity centrifugal environment

Abstract

The invention discloses an underwater explosion test device for use in an ultra-gravity centrifugal environment, comprising a micro-vibration base made of a five-mode metamaterial, a support base, a highly transparent explosion-proof barrel, an explosion-proof bracket, a multi-column laser line array scanning camera, an explosion source and a plurality of pressure sensors, wherein the support base is fixed on the micro-vibration base, the highly transparent explosion-proof barrel and a plurality of explosion-proof brackets are all fixed on the support base, a row of laser line array scanning cameras facing the highly transparent explosion-proof barrel is fixed on each explosion-proof bracket, the explosion source is fixed on the support base and overlaps with the axis of the highly transparent explosion-proof barrel, a plurality of pressure sensors are respectively arranged on the support base and on the inner wall of the highly transparent explosion-proof barrel, and the explosion source, the multi-column laser line array scanning camera and the plurality of pressure sensors are all connected to an external controller. The invention can suppress the vibration in the sky-earth direction in an ultra-gravity centrifugal environment, can clearly capture the bubbles and explosion shock waves after the underwater explosion in real time, and provide strong technical support for deep-sea blasting research.

Description

Technical Field

[0001] The invention relates to the technical field of ultra-gravity centrifuge technology, in particular to an underwater explosion test device used in an ultra-gravity centrifuge environment. Background Art

[0002] Deep sea environments have special conditions such as high pressure, high temperature, and high salinity, and are also affected by the earth's gravity. Hypergravity underwater tests can simulate the high gravity conditions in deep sea environments and provide experimental data for deep sea scientific research and engineering applications. Underwater explosion tests in hypergravity centrifugal environments are widely used in national defense and military industry, by using small-scale explosion scale models in hypergravity environments to invert large-volume explosion tests.

[0003] At present, there is no underwater explosion test equipment suitable for ultra-gravity centrifugal environment in the ultra-gravity field, because the bubbles generated by ultra-gravity underwater explosions are difficult to capture, and the explosion shock waves cannot be monitored in real time. At the same time, the vibration of the centrifuge itself will also have a great interference on the migration of bubbles generated by underwater explosions. As a result, the existing instruments and equipment used for underwater explosions cannot be applied to the ultra-gravity centrifugal simulation environment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an underwater explosion test device for use in an ultra-gravity centrifugal environment, which can suppress vibrations in the sky-earth direction in the ultra-gravity centrifugal environment, and can clearly capture bubbles and explosion shock waves after underwater explosions in real time, providing strong technical support for deep-sea blasting research.

[0005] The technical solution of the present invention is:

[0006] An underwater explosion test device for use in an ultra-gravity centrifugal environment comprises a micro-vibration base, a support base, a highly transparent explosion-proof barrel, a plurality of explosion-proof brackets, a plurality of laser line array scanning cameras, an explosion source and a plurality of pressure sensors, wherein the support base is fixed on the top of the micro-vibration base, the highly transparent explosion-proof barrel is a tubular structure with a bottom end and a top end connected, the bottom ends of the highly transparent explosion-proof barrel and a plurality of explosion-proof brackets are fixed on the top of the support base, and the plurality of explosion-proof brackets are evenly distributed on the periphery of the highly transparent explosion-proof barrel, a row of laser line array scanning cameras is fixed on each explosion-proof bracket, and each row of laser line array scanning cameras has a plurality of pressure sensors. The lenses are all facing the highly transparent explosion-proof barrel, the explosion source is fixed on the top of the support base and overlaps with the axis of the highly transparent explosion-proof barrel, multiple pressure sensors are respectively arranged on the top of the support base inside the highly transparent explosion-proof barrel and on the inner wall of the highly transparent explosion-proof barrel, the pressure sensor on the support base is adjacent to the explosion source, and the multiple pressure sensors arranged on the inner wall of the highly transparent explosion-proof barrel are evenly distributed along the circumference of the highly transparent explosion-proof barrel, the explosion source, the multi-column laser linear array scanning camera and the multiple pressure sensors are all connected to an external controller, and the highly transparent explosion-proof barrel is filled with water and placed in a centrifuge to conduct an underwater explosion test in a supergravity centrifugal environment;

[0007] The micro-vibration base is composed of a plurality of micro-vibration units distributed in a matrix and fixedly connected, each micro-vibration unit includes an active vibration isolation plate, a passive vibration isolation plate, and a first vibration isolation metamaterial bracket and a second vibration isolation metamaterial bracket connected between the active vibration isolation plate and the passive vibration isolation plate, the active vibration isolation plate is located directly above the passive vibration isolation plate and is fixedly connected to the support base, the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are both five-mode metamaterials formed by splicing a plurality of unit cells, the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket both include two columns and an oblique brace, the oblique brace is located between the two columns, the top end of the oblique brace is fixedly connected to the top end of one of the columns, the bottom end of the oblique brace is fixedly connected to the bottom end of the other column, the first vibration isolation metamaterial bracket The angle between the diagonal brace of the material bracket and the diagonal brace of the second vibration isolation metamaterial bracket is 90 degrees, that is, the diagonal brace of the first vibration isolation metamaterial bracket overlaps with the diagonal brace of the second vibration isolation metamaterial bracket after rotating 90 degrees along its axis, the two columns and the diagonal brace of the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are both serrated structures, and adjacent serrated portions composed of unit cells are connected by a connecting portion composed of unit cells. The connecting portions of the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are fixedly connected between the middle portions of adjacent serrated portions, and the thickness and width of the connecting portion and the serrated portion are consistent. The serrated extension directions of the two columns and the diagonal brace of the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are consistent, and the placement directions of multiple micro-vibration units in the micro-vibration base are consistent.

[0008] The thickness of the sawtooth portion and the connecting portion of the first vibration isolation metamaterial support is L1, the thickness of the sawtooth portion and the connecting portion of the second vibration isolation metamaterial support is L2, the cross-sections of the active vibration isolation plate and the passive vibration isolation plate are both square and of the same size, the lengths of the active vibration isolation plate and the passive vibration isolation plate are both L3, the distance between the active vibration isolation plate and the passive vibration isolation plate is L5, the cross-sections of the micro-vibration base and the support base are both square, the side length of the micro-vibration base is M×L3, and the micro-vibration base is composed of M 2 The side length of the support base is L4, the centers of the micro-vibration base and the support base overlap and the sides are parallel to each other, the size of each micro-vibration unit conforms to the proportional relationship of the following formula (1), and the side lengths of the micro-vibration base and the support base conform to the proportional relationship of the following formula (2):

[0009]

[0010] In formula (1) and formula (2), k4 is the adjustment coefficient of the five-mode metamaterial, which is a dimensionless parameter; N is the target G value of the centrifuge, which is a dimensionless parameter; k3 is the vibration influence coefficient of the centrifuge, and M represents that the micro-vibration base is composed of M micro-vibration units in both the lateral and longitudinal directions.

[0011] The ratio of the length of the sawtooth portion of the first vibration isolation metamaterial support and the length of the connecting portion thereof is 2.54-3.68.

[0012] The support base is a highly transparent support base made of the same material as the highly transparent explosion-proof barrel.

[0013] A water injection pipe is provided on the support base, the water inlet of the water injection pipe passes through the side wall of the support base, and the water outlet of the water injection pipe passes through the top surface of the support base. Before conducting an underwater explosion test, the water inlet of the water injection pipe is connected to the water pipe of the centrifuge to inject water into the highly transparent explosion-proof barrel. After the water injection is completed, an explosion-proof sealing plate is arranged at the water outlet on the top surface of the support base, and the explosion source is fixed on the explosion-proof sealing plate.

[0014] The highly transparent explosion-proof barrel is provided with a water surface floating structure, which is a light-proof solid floating object. After the highly transparent explosion-proof barrel is filled with water, the water surface floating structure floats on the water surface.

[0015] The lens of each laser line array scanning camera in the multi-column laser line array scanning camera is horizontally oriented toward the axis of the high-transparency explosion-proof barrel. The multiple laser line array scanning cameras in the multi-column laser line array scanning camera are arranged in multiple circles and are located at different horizontal heights. The laser light power of each laser line array scanning camera satisfies the following formula (3):

[0016] P t (λ)=P i (λ)×k2×e c(λ) -P c (λ)-N×k1×[P α (λ)+P s (λ,Φ)] (3);

[0017] In formula (3), P t (λ) is the remaining optical power after the laser line array scanning camera transmits the laser; P i (λ) is the initial optical power of the laser emitted by the laser line array scanning camera; k2 is the total coefficient of variation of salt concentration and temperature under ultra-gravity water; e c(λ) is the sum of the absorption coefficient and scattering coefficient of the water in the high-transparent explosion-proof barrel to the emitted laser power; P c (λ) is the optical power lost after the laser line array scanning camera emits laser light through the high transparent explosion-proof barrel; N is the target G value of the centrifuge; k1 is the flow interference attenuation value of floating particles in the water; P α (λ) is the optical power of the emitted laser attenuated in water; P s (λ,Φ) is the optical power lost due to dispersion of the emitted laser in the direction of the dispersion angle Φ.

[0018] The multi-column laser line array scanning camera is connected to the controller via an IO-LINK bus.

[0019] The pressure sensor is a flexible film pressure sensor.

[0020] The controller uses a timing controller. When the centrifuge reaches the target G value, the timing controller first starts to collect image data taken by multiple laser linear array scanning cameras in the first timing, then starts to collect pressure data of multiple pressure sensors in the second timing, and controls the explosion source to detonate in the third timing.

[0021] Advantages of the present invention:

[0022] (1) The present invention is provided with a micro-vibration base, which is composed of a plurality of micro-vibration units distributed in a matrix and fixedly connected. Each micro-vibration base includes an active vibration isolation plate, a passive vibration isolation plate, a first vibration isolation metamaterial bracket and a second vibration isolation metamaterial bracket. When the underwater explosion test device is placed in a centrifuge for testing, the explosion itself will generate a large vibration. In order to reduce the impact of vibration on the operation of the centrifuge during the test, an active vibration isolation plate is used to isolate the explosion foundation on the supporting base, and a passive vibration isolation plate is used to eliminate the vibration in the supergravity direction (horizontal direction) during the operation of the centrifuge, and the underwater explosion test device is isolated from the bottom plate of the centrifuge basket, so as to reduce the transmission of the explosion vibration of the underwater explosion test device to the bottom plate of the centrifuge basket, thereby interfering with the operation of the entire centrifuge. The first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are both five-mode metamaterials composed of unit cells. When they are only subjected to vertical vibration, the vibration of the first vibration isolation metamaterial bracket is reduced. When subjected to axial load in the vertical direction, the microstructure unit of the five-mode metamaterial will not deform. When subjected to shear stress in the horizontal direction, the microstructure unit of the five-mode metamaterial will deform. The deformation at this time causes the overall structure of the five-mode metamaterial to buckle. When the underwater explosion test device explodes and generates vibration, the vibration is transmitted to the micro-vibration base in the form of shear force, which will cause the first vibration isolation metamaterial bracket to buckle. The second vibration isolation metamaterial bracket with the opposite direction of the diagonal support will not deform due to the different directions of the shear force. However, since the second vibration isolation metamaterial bracket is subjected to axial pressure, the axial pressure will not cause the microstructure of the five-mode metamaterial to deform. Therefore, the second vibration isolation metamaterial bracket will suppress the buckling of the first vibration isolation metamaterial bracket. Therefore, the micro-vibration base with this structure can suppress the violent vibration in the sky-to-earth direction generated during the operation of the centrifuge, thereby avoiding the vibration of the centrifuge interfering with the pulsation process of bubbles generated by the explosion.

[0023] (2) The present invention reasonably configures the size of each micro-vibration unit, and reasonably configures the size of the micro-vibration base and the supporting base, so that the design size of the micro-vibration unit meets the advantage of suppressing the vibration of the centrifuge.

[0024] (3) The present invention forms a huge annular laser sensing field of view through a plurality of laser linear array scanning cameras arranged in a ring, and collects the explosion situation in the highly transparent explosion-proof barrel in real time. By utilizing the dispersion characteristics of water on the spectrum, that is, the laser emitted by the plurality of laser linear array scanning cameras can penetrate the turbid water, and clearly scan and capture the morphology of the bubbles generated by the explosion.

[0025] (4) Underwater imaging in ultra-gravity centrifugal environment is an extremely special environment with extremely complex influencing components. In addition to water molecules and inorganic solutions, it is also rich in floating particles. The various material components underwater are uneven, which causes the energy of light waves to decay rapidly during underwater transmission. The present invention calculates the attenuation of the optical power of the laser emitted by the laser line array scanning camera, so that the laser emitted by the laser line array scanning camera can pass through turbid water and clearly capture real-time images.

[0026] (5) The water injection pipeline of the present invention is arranged at the bottom of the device, and the rapid water injection operation at different water levels is realized through the water pipe of the centrifuge. After the water is injected, the water injection pipeline is blocked by the explosion-proof sealing plate to realize the bottom sealing of the highly transparent explosion-proof barrel. The explosion source is fixed on the explosion-proof sealing plate to avoid damage to the water injection pipeline when the explosion source explodes.

[0027] (6) The present invention sets a floating structure on the water surface in a highly transparent explosion-proof barrel to simulate an offshore structure in the ocean, thereby realizing experimental research on solid-liquid-gas multiphase media in underwater explosion tests under a supergravity centrifugal environment.

[0028] (7) The present invention adopts a timing controller for timing control. The interval between adjacent timings is greater than 1s. The purpose is to ensure that the laser linear array scanning camera can completely capture the entire change process of the underwater explosion. The timing controller can effectively avoid the problem of data capture failure due to delay. When the laser linear array scanning camera acquisition or the pressure sensor acquisition fails, the detonation of the explosion source will be stopped to avoid blindly starting the explosion and causing test failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] Figure 2 It is a cutaway view of the present invention.

[0031] Figure 3 It is a control principle block diagram of the present invention.

[0032] Figure 4 It is a three-dimensional diagram of the micro-vibration unit of the present invention.

[0033] Figure 5 It is a front view of the micro-vibration unit of the present invention.

[0034] Figure 6 It is a structural schematic diagram of the first vibration isolation metamaterial bracket of the present invention.

[0035] Figure 7 It is a front view of the first vibration isolation metamaterial support column of the present invention.

[0036] Figure 8 It is a structural schematic diagram of the present invention after being placed in a centrifuge and in a static state.

[0037] Fig. 9 It is a schematic diagram of the structure of the present invention after being placed in a centrifuge and started, and being in an ultra-gravity centrifugal environment.

[0038] Figure numerals: 1-micro-vibration base, 2-high transparent support base, 3-high transparent explosion-proof barrel, 4-explosion-proof bracket, 5-laser linear array scanning camera, 6-explosion source, 7-flexible film pressure sensor, 8-floating structure on the water surface, 9-water injection pipe, 10-explosion-proof sealing plate, 11-timing controller, 101-active vibration isolation plate, 102-passive vibration isolation plate, 103-first vibration isolation metamaterial bracket, 104-second vibration isolation metamaterial bracket, 1A-column, 2A-diagonal brace, 1B serrated portion, 2B-connecting portion, 01-centrifuge, 02-underwater explosion test device, 03-balancing mass block. DETAILED DESCRIPTION

[0039] 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.

[0040] See Figure 1-Figure 7 , an underwater explosion test device for use in an ultra-gravity centrifugal environment, comprising a micro-vibration base 1, a highly transparent support base 2, a highly transparent explosion-proof barrel 3, a plurality of explosion-proof brackets 4, a multi-row laser linear array scanning camera 5, an explosion source 6, a plurality of flexible film pressure sensors 7 and a water surface floating structure 8. The highly transparent support base 2 and the highly transparent explosion-proof barrel 3 are made of the same material. The explosion shock wave will be refracted after impacting the wall surface. Different materials will absorb different amounts of refracted waves. Therefore, making the highly transparent support base 2 and the highly transparent explosion-proof barrel 3 of the same material will achieve the best test effect;

[0041] The highly transparent support base 2 is fixed on the top of the micro-vibration base 1. The highly transparent explosion-proof barrel 3 is a tubular structure with the bottom and the top connected. The bottom end of the highly transparent explosion-proof barrel 3 is fixed and sealed on the top of the highly transparent support base 2 through a flange. The bottom ends of multiple explosion-proof brackets 4 are also fixed on the top of the highly transparent support base 2 and are evenly distributed on the outer periphery of the highly transparent explosion-proof barrel 3. Each explosion-proof bracket 4 is fixed with a row of laser line array scanning cameras 5. The lens of each laser line array scanning camera 5 in the multiple rows of laser line array scanning cameras is Horizontally facing the axis of the highly transparent explosion-proof barrel 3, multiple laser line array scanning cameras 5 in the multiple rows of laser line array scanning cameras are arranged in multiple circles and are located at different horizontal heights. A water injection pipe 9 is opened on the highly transparent support base 2. The water inlet of the water injection pipe 9 passes through the side wall of the highly transparent support base 2, and the water outlet of the water injection pipe 9 passes through the top surface of the highly transparent support base 2. Before conducting the underwater explosion test, the water inlet of the water injection pipe 9 is connected to the water pipe of the centrifuge to inject water into the highly transparent explosion-proof barrel 3. After the water injection is completed, An explosion-proof sealing plate 10 is arranged at the water outlet on the top surface of the highly transparent supporting base 2, an explosion source 6 is fixed on the explosion-proof sealing plate 10 and overlaps with the axis of the highly transparent explosion-proof barrel 3, and a plurality of flexible film pressure sensors 7 are arranged on the top of the highly transparent supporting base 2 inside the highly transparent explosion-proof barrel 3 and on the inner wall of the highly transparent explosion-proof barrel 3, respectively. The flexible film pressure sensor 7 on the highly transparent supporting base 2 is adjacent to the explosion source 6, and a plurality of flexible film pressure sensors 7 arranged on the inner wall of the highly transparent explosion-proof barrel 3 are evenly spaced along the circumference of the highly transparent explosion-proof barrel 3. The highly transparent explosion-proof barrel 3 is evenly distributed. A water surface floating structure 8 is arranged in the highly transparent explosion-proof barrel 3. The water surface floating structure 8 is a solid floating object that is opaque. After the highly transparent explosion-proof barrel 3 is filled with water, the water surface floating structure 8 floats on the water surface. The explosion source 6 and multiple flexible film pressure sensors 7 are all connected to an external timing controller 11. The multi-column laser linear array scanning camera 5 is connected to the timing controller 11 through an IO-LINK bus 12. After the highly transparent explosion-proof barrel 3 is filled with water, it is placed in a centrifuge to perform an underwater explosion test under an ultra-gravity centrifugal environment.

[0042] The micro-vibration base 1 is composed of a plurality of micro-vibration units distributed in a matrix and fixedly connected, each of which includes an active vibration isolation plate 101, a passive vibration isolation plate 102, and a first vibration isolation metamaterial bracket 103 and a second vibration isolation metamaterial bracket 104 connected between the active vibration isolation plate 101 and the passive vibration isolation plate 102. The active vibration isolation plate 101 and the passive vibration isolation plate 102 are both shock-absorbing rubbers. The active vibration isolation plate 101 is located directly above the passive vibration isolation plate 102 and is fixedly connected to the highly transparent support base 2. The first vibration isolation metamaterial bracket 103 and the second vibration isolation metamaterial bracket 104 are both five-mode metamaterials formed by splicing a plurality of unit cells. The first vibration isolation metamaterial bracket 103 and the second vibration isolation metamaterial bracket 104 both include two columns 1A and a diagonal brace 2A. The diagonal brace 2A is located between the two columns 1A. The top of the diagonal brace 2A is fixedly connected to the top of one of the columns 1A, and the bottom end of the diagonal brace 2A is fixed to the bottom end of the other column 1A. The angle between the oblique brace 2A of the first vibration isolation metamaterial support 103 and the oblique brace 2A of the second vibration isolation metamaterial support 104 is 90 degrees, that is, the oblique brace 2A of the first vibration isolation metamaterial support 103 rotates 90 degrees along its axis and overlaps with the oblique brace 2A of the second vibration isolation metamaterial support 104. The two columns 1A and the oblique brace 2A of the first vibration isolation metamaterial support 103 and the second vibration isolation metamaterial support 104 are both serrated structures, and the adjacent serrated parts 1B composed of unit cells are connected by a connecting part 2B composed of unit cells. The connecting parts 2B of the first vibration isolation metamaterial support 103 and the second vibration isolation metamaterial support 104 are fixedly connected between the middle parts of the adjacent serrated parts 1B, and the thickness and width of the connecting part 2B and the serrated part 1B are consistent. The sawtooth extension directions of the two columns 1A and the oblique brace 2A of the first vibration isolation metamaterial support 103 and the second vibration isolation metamaterial support 104 are consistent, and the placement directions of the multiple micro-vibration units in the micro-vibration base 1 are consistent.

[0043] The thickness of the sawtooth portion 1B and the connecting portion 2B of the first vibration isolation metamaterial support 103 is L1, the thickness of the sawtooth portion 1B and the connecting portion 2B of the second vibration isolation metamaterial support 104 is L2, the cross-sections of the active vibration isolation plate 101 and the passive vibration isolation plate 102 are both square and have the same size, the lengths of the active vibration isolation plate 101 and the passive vibration isolation plate 102 are both L3, the distance between the active vibration isolation plate 101 and the passive vibration isolation plate 102 is L5, the cross-sections of the micro-vibration base 1 and the high transparent support base 2 are both square, the side length of the micro-vibration base 1 is M×L3, and the micro-vibration base 1 is composed of M 2The micro-vibration base 1 is composed of a micro-vibration unit, the side length of the highly transparent support base 2 is L4, the centers of the micro-vibration base 1 and the support base 2 overlap and the side lengths are parallel to each other, and the ratio of the length of the sawtooth portion 1B of each micro-vibration unit's first vibration isolation metamaterial support 103 and the second vibration isolation metamaterial support 104 to the length of its connecting portion 2B is 2.54-3.68, so that in a low-frequency vibration environment, it has a good rebound effect, the size of each micro-vibration unit conforms to the proportional relationship of the following formula (1), and the side lengths of the micro-vibration base 1 and the highly transparent support base 2 conform to the proportional relationship of the following formula (2):

[0044]

[0045]

[0046] In formula (1) and formula (2), k4 is the adjustment coefficient of the five-mode metamaterial, which is a dimensionless parameter; N is the target G value of the centrifuge, which is a dimensionless parameter; k3 is the vibration influence coefficient of the centrifuge, and M represents that the micro-vibration base 1 is composed of M micro-vibration units in both the horizontal and vertical directions;

[0047] The laser light power of each laser line array scanning camera 5 satisfies the following formula (3):

[0048] P t (λ)=P i (λ)×k2×e c(λ) -P c (λ)-N×k1×[P α (λ)+P s (λ,Φ)] (3);

[0049] In formula (3), P t (λ) is the remaining optical power after the laser line array scanning camera transmits the laser; P i (λ) is the initial optical power of the laser emitted by the laser line array scanning camera; k2 is the total coefficient of variation of salt concentration and temperature under ultra-gravity water; e c(λ) is the sum of the absorption coefficient and scattering coefficient of the water in the high-transparent explosion-proof barrel to the emitted laser power; P c (λ) is the optical power lost after the laser line array scanning camera emits laser light through the high transparent explosion-proof barrel; N is the target G value of the centrifuge; k1 is the flow interference attenuation value of floating particles in the water; P α (λ) is the optical power of the emitted laser attenuated in water; P s (λ,Φ) is the optical power lost due to dispersion of the emitted laser in the direction of the dispersion angle Φ.

[0050] Working principle of the present invention:

[0051] (1) Before the test in the hypergravity environment, one or more underwater explosion test devices 02 are placed inside the hanging basket on one side of the centrifuge 01, the micro-vibration base 1 is supported on the bottom plate of the hanging basket, and the laser linear array scanning camera 5, the explosion source 6, and the flexible film pressure sensor 7 are connected to the external timing controller 11 through signal cables, and the water inlet of the water injection pipe 9 is connected to the water pipe of the centrifuge 01. A balancing mass block 03 (see Figure 8 );

[0052] (2) Fill water into the highly transparent explosion-proof barrel 3 through the water injection pipe 9. After the water level reaches the target water level, install the explosion-proof sealing plate 10 and the explosion source 6;

[0053] (3) See Fig. 9 , start the centrifuge 01. When the centrifuge 01 reaches the target G value, the test begins. The timing controller 11 first starts to collect image data captured by the multi-column laser line array scanning camera 5 in the first timing, and then starts to collect pressure data of the multiple flexible film pressure sensors 7 in the second timing. The third timing controls the explosion source 6 to detonate. The multi-column laser line array scanning camera 5 collects the size and morphology of the bubbles generated during the explosion, as well as the image of the movement state of the floating structure 8 on the water surface. The multiple flexible film pressure sensors 7 collect the impact force during the explosion, including the explosion impact and the bubble pulsation impact. Then the collected data is synchronously transmitted to the timing controller 11 for subsequent underwater explosion analysis in a hypergravity environment.

[0054] After one test is finished, the centrifuge 01 is turned off, the water level in the highly transparent explosion-proof barrel 3 is readjusted, a new explosion source 6 is installed, and the above steps are repeated to continue the test.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An underwater explosion test device for use in an ultra-gravity centrifugal environment, characterized in that: The invention comprises a micro-vibration base, a support base, a highly transparent explosion-proof barrel, a plurality of explosion-proof brackets, a plurality of laser line array scanning cameras, an explosion source and a plurality of pressure sensors. The support base is fixed on the top of the micro-vibration base. The highly transparent explosion-proof barrel is a tubular structure with a bottom end and a top end connected. The bottom ends of the highly transparent explosion-proof barrel and a plurality of explosion-proof brackets are fixed on the top of the support base. The plurality of explosion-proof brackets are evenly distributed on the periphery of the highly transparent explosion-proof barrel. A row of laser line array scanning cameras is fixed on each explosion-proof bracket. The lenses of each row of laser line array scanning cameras are all facing the highly transparent explosion-proof barrel. The explosion source is fixed on the top of the support base and overlaps with the axis of the highly transparent explosion-proof barrel. A plurality of pressure sensors are respectively arranged on the top of the support base inside the highly transparent explosion-proof barrel and on the inner wall of the highly transparent explosion-proof barrel. The pressure sensor on the support base is adjacent to the explosion source. The plurality of pressure sensors arranged on the inner wall of the highly transparent explosion-proof barrel are evenly distributed along the circumference of the highly transparent explosion-proof barrel. The explosion source, the multi-column laser linear array scanning camera and the plurality of pressure sensors are all connected to an external controller. After the highly transparent explosion-proof barrel is filled with water, it is placed in a centrifuge to conduct an underwater explosion test under a supergravity centrifugal environment. The micro-vibration base is composed of a plurality of micro-vibration units distributed in a matrix and fixedly connected, each micro-vibration unit includes an active vibration isolation plate, a passive vibration isolation plate, and a first vibration isolation metamaterial bracket and a second vibration isolation metamaterial bracket connected between the active vibration isolation plate and the passive vibration isolation plate, the active vibration isolation plate is located directly above the passive vibration isolation plate and is fixedly connected to the support base, the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are both five-mode metamaterials formed by splicing a plurality of unit cells, the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket both include two columns and an oblique brace, the oblique brace is located between the two columns, the top end of the oblique brace is fixedly connected to the top end of one of the columns, the bottom end of the oblique brace is fixedly connected to the bottom end of the other column, the first vibration isolation metamaterial bracket The angle between the diagonal brace of the first vibration isolation metamaterial bracket and the diagonal brace of the second vibration isolation metamaterial bracket is 90 degrees, that is, the diagonal brace of the first vibration isolation metamaterial bracket rotates 90 degrees along its axis and overlaps with the diagonal brace of the second vibration isolation metamaterial bracket. The two columns and the diagonal brace of the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are both sawtooth structures, and the adjacent sawtooth parts composed of unit cells are connected by a connecting part composed of unit cells. The connecting parts of the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are fixedly connected between the middle parts of the adjacent sawtooth parts, and the thickness and width of the connecting part and the sawtooth part are consistent. The sawtooth extension directions of the two columns and the diagonal brace of the first vibration isolation metamaterial bracket and the second vibration isolation metamaterial bracket are consistent, and the placement directions of multiple micro-vibration units in the micro-vibration base are consistent; The thickness of the sawtooth portion and the connecting portion of the first vibration isolation metamaterial support is L1, the thickness of the sawtooth portion and the connecting portion of the second vibration isolation metamaterial support is L2, the cross-sections of the active vibration isolation plate and the passive vibration isolation plate are both square and of the same size, the lengths of the active vibration isolation plate and the passive vibration isolation plate are both L3, the distance between the active vibration isolation plate and the passive vibration isolation plate is L5, the cross-sections of the micro-vibration base and the support base are both square, the side length of the micro-vibration base is M×L3, and the micro-vibration base is composed of M 2 The side length of the support base is L4, the centers of the micro-vibration base and the support base overlap and the sides are parallel to each other, the size of each micro-vibration unit conforms to the proportional relationship of the following formula (1), and the side lengths of the micro-vibration base and the support base conform to the proportional relationship of the following formula (2): In formula (1) and formula (2), k4 is the adjustment coefficient of the five-mode metamaterial, which is a dimensionless parameter; N is the target G value of the centrifuge, which is a dimensionless parameter; k3 is the vibration influence coefficient of the centrifuge, and M represents that the micro-vibration base is composed of M micro-vibration units in both the lateral and longitudinal directions.

2. The underwater explosion test device for use in an ultra-gravity centrifugal environment according to claim 1, characterized in that: The ratio of the length of the sawtooth portion of the first vibration isolation metamaterial support and the length of the connecting portion thereof is 2.54-3.

68.

3. The underwater explosion test device for use in an ultra-gravity centrifugal environment according to claim 1, characterized in that: The support base is a highly transparent support base made of the same material as the highly transparent explosion-proof barrel.

4. The underwater explosion test device for use in an ultra-gravity centrifugal environment according to claim 1, characterized in that: A water injection pipe is provided on the support base, the water inlet of the water injection pipe passes through the side wall of the support base, and the water outlet of the water injection pipe passes through the top surface of the support base. Before conducting an underwater explosion test, the water inlet of the water injection pipe is connected to the water pipe of the centrifuge to inject water into the highly transparent explosion-proof barrel. After the water injection is completed, an explosion-proof sealing plate is arranged at the water outlet on the top surface of the support base, and the explosion source is fixed on the explosion-proof sealing plate.

5. The underwater explosion test device for use in an ultra-gravity centrifugal environment according to claim 1, characterized in that: The highly transparent explosion-proof barrel is provided with a water surface floating structure, which is a light-proof solid floating object. After the highly transparent explosion-proof barrel is filled with water, the water surface floating structure floats on the water surface.

6. The underwater explosion test device for use in an ultra-gravity centrifugal environment according to claim 1, characterized in that: The lens of each laser line array scanning camera in the multi-column laser line array scanning camera is horizontally oriented toward the axis of the high-transparency explosion-proof barrel. The multiple laser line array scanning cameras in the multi-column laser line array scanning camera are arranged in multiple circles and are located at different horizontal heights. The laser light power of each laser line array scanning camera satisfies the following formula (3): P t (λ)=P i (λ)×k2×e c(λ) -P c (λ)-N×k1×[P α (λ)+P s (λ,Φ)] (3); In formula (3), P t (λ) is the remaining optical power after the laser line array scanning camera transmits the laser; P i (λ) is the initial optical power of the laser emitted by the laser line array scanning camera; k2 is the total coefficient of variation of salt concentration and temperature under ultra-gravity water; e c(λ) is the sum of the absorption coefficient and scattering coefficient of the water in the high-transparent explosion-proof barrel to the emitted laser power; P c (λ) is the optical power lost after the laser line array scanning camera emits laser light through the high transparent explosion-proof barrel; N is the target G value of the centrifuge; k1 is the flow interference attenuation value of floating particles in the water; P α (λ) is the optical power of the emitted laser attenuated in water; P s (λ,Φ) is the optical power lost due to dispersion of the emitted laser in the direction of the dispersion angle Φ.

7. The underwater explosion test device for use in an ultra-gravity centrifugal environment according to claim 1, characterized in that: The multi-column laser line array scanning camera is connected to the controller via an IO-LINK bus.

8. The underwater explosion test device for use in an ultra-gravity centrifugal environment according to claim 1, characterized in that: The pressure sensor is a flexible film pressure sensor.

9. The underwater explosion test device for use in an ultra-gravity centrifugal environment according to claim 1, characterized in that: The controller uses a timing controller. When the centrifuge reaches the target G value, the timing controller first starts to collect image data taken by multiple laser linear array scanning cameras in the first timing, then starts to collect pressure data of multiple pressure sensors in the second timing, and controls the explosion source to detonate in the third timing.

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