73 results about "Underwater explosion" patented technology

The invention provides a numerical calculation method for double-explosion-source underwater explosion impact cavitation loads, and belongs to the technical field of computer data processing-based explosion impact wave calculation, and the method comprises the following steps: solving a propagation process of far-field underwater double-explosion-source explosion impact waves in a two-dimensional acoustic flow field by using a local discontinuous Galerkin (LDG) method; and the cavitation characteristics of the flow field under the action of the double-explosion-source underwater explosion shock waves are researched. A flow field dynamic pressure result calculated by the method is compared with a result calculated by an acoustic finite element method. The result shows that the flow field dynamic pressure result calculated by the method is well matched with the calculation result data of the acoustic finite element method, and the effectiveness and the accuracy of the method are verified.

The invention discloses an underwater explosion impact equivalent loading test device and method, and belongs to the technical field of dynamic impact test mechanics, the underwater explosion impact equivalent loading test device comprises a light gas gun system, a combined water shock tube system and a measurement control system, the light gas gun system is a shock wave load loading system of a water shock tube, and the combined water shock tube system is connected with the measurement control system. Comprising a piston, a working table support, a steel pipe, a pressure sensor, a connecting flange, a connecting assembly, a transparent pipe, a double-thread screw assembly, a front panel, a test sample, a rear panel, a working table fixing support and a working table top, and a measurement control system comprises a light gas gun pressurization and emission controller, a high-speed acquisition instrument, a first high-speed camera and a second high-speed camera. The underwater explosion impact equivalent loading test device and the underwater explosion impact equivalent loading test method are compact in structure, convenient to use and suitable for researching underwater dynamic impact protection performance and fluid-solid coupling mechanism of materials or structures in laboratories.

The utility model provides an underwater explosion efficient shaped charge cutting device based on combined charge, which comprises an underwater annular shaped charge structure and a positioning device, the positioning device is connected with a semi-annular shaped charge structure through a connecting device, and the outer side of the semi-annular shaped charge structure is connected with a detonator; the two positioning devices are arranged on the outer side of the cutting position of the target tubular structure, and the two positioning devices are fixed to each other; the two semi-annular shaped charge structures are arranged on the outer side of the cutting position of the target tubular structure, the two semi-annular shaped charge structures are fixed to each other, and each semi-annular shaped charge structure comprises a plurality of equally-divided cutting units. The cutting end face formed by the underwater explosion cutting device has high fairness, the refinement level of underwater explosion cutting is improved, the underwater explosion cutting device is suitable for cutting tubular structures in any direction and with any structural parameters on the seabed, deep water cutting operation can be achieved, and the underwater explosion cutting device can also be used for cutting structures with rigid body displacement after underwater explosion of flexible bodies such as steel cables, optical cables and electric cables.

The invention discloses a metal product surface sealing device based on an underwater explosion cladding technology, and belongs to the technical field of metal surface treatment. A pressure-resistant cavity is formed in the sealing box body, a buffer supporting structure is arranged at the bottom of the sealing box body, and a fuel tank and a combustion-supporting gas input connector are arranged at the top of the sealing box body; the two oppositely-arranged fixing assemblies are arranged in the pressure-resistant cavity, and a base plate and a covering plate are arranged between the two fixing assemblies; the ignition assembly comprises a mounting shell, a pulse igniter, a safety interlocking module and a power management unit are integrally mounted in the mounting shell, and the gas circuit control system comprises a fuel conveying pipeline and a combustion-supporting gas input pipeline which communicate with a fuel tank. According to the device, efficient and safe operation of underwater explosion compounding is achieved through collaborative innovation of multiple assemblies, the adjustable fixing assembly guarantees the positioning precision of the base plate / covering plate, the intelligent ignition system avoids the ignition failure risk, gas path closed-loop control optimizes the explosion energy stability, and the service life of the device is prolonged through a buffer supporting structure.

The invention discloses an underwater explosion near-field shock wave indirect measurement device in a limited space, a measurement method and an installation method, belongs to the technical field of explosion shock wave load measurement, and solves the technical problem that near-field shock wave measurement and free-field shock wave decoupling measurement cannot be realized due to direct action of strong shock waves and interference of reflected waves in the prior art. The device is of a shock tube type structure and comprises a measuring structure head round tube, a measuring structure tail round tube, a sensor tail bypass extension round tube, a sensor head bypass extension round tube, an underwater explosion free field sensor, a sensor tail bypass round tube and a sensor head bypass round tube. And the tail part of the underwater explosion free field sensor extends into the sensor tail part bypass extension circular tube, and the head part of the underwater explosion free field sensor extends into the sensor head part bypass extension circular tube. The method is suitable for the field of impact measurement of underwater explosion and can be applied to the field of performance evaluation of underwater explosion sources.

The present invention discloses a method for correcting explosive initial conditions for numerical simulation of underwater explosions. The explosive is approximated as a sphere, and a computational model for a free-field spherically symmetric underwater explosion is established. Initial parameters of the explosive, including initial density and initial internal energy per unit mass of the explosive, are input into the JWL equation of state to obtain preliminary pressure-time curves at different spatial positions. The peak value of the shock wave pressure is extracted and compared with the results of an experiment or empirical formula. If the error does not exceed 5%, the initial internal energy per unit mass of the explosive is maintained unchanged; otherwise, the initial internal energy per unit mass of the explosive is adjusted until the error does not exceed 5%. The bubble pulsation period is determined and compared with the results of an experiment or empirical formula. If the error does not exceed 5%, the initial density of the explosive is maintained unchanged; otherwise, the initial density of the explosive is adjusted until the error does not exceed 5%. The present invention can accurately predict the peak value of the shock wave pressure and the bubble pulsation period, has the advantages of low cost and high efficiency, and can provide more accurate load input for the calculation of three-dimensional underwater explosion models.

The invention discloses a two-dimensional near-free-surface underwater explosion cavitation forecasting method, and relates to the technical field of explosion.The method comprises the steps that a mixed fluid is regarded as a mixture of multiple fluid media, and a multiphase compressible fluid motion control equation related to state parameters of the mixed fluid before the mixed fluid reaches an equilibrium state and the mass fraction of the fluid media of all phases is constructed; then constructing a thermodynamic state equation of any k-phase fluid medium based on an NASG equation, and constructing a cavitation phase change equation after the mixed fluid completes phase change relaxation to reach an equilibrium state by considering the phase change process of a liquid phase and a steam phase when a flow field changes; and solving an equation set formed by a multiphase compressible fluid motion control equation, a thermodynamic state equation of each phase of fluid medium and a cavitation phase change equation in each cycle step to obtain a numerical forecasting result. According to the method, cavitation is regarded as the continuous accumulation process of the steam phase content in the mixed fluid, the physical essence is better met, and therefore the forecasting result is more accurate.

The invention provides a prediction method for dynamic buckling characteristics of a reinforced cylindrical shell with initial defects under an underwater explosion load based on artificial intelligence. The method specifically comprises the following steps: establishing a dynamic response characteristic three-dimensional numerical calculation model of initial defects of the reinforced cylindrical shell structure under an underwater explosion load; obtaining a rib and skin rigidity matching factor; calculating dynamic response characteristics of the reinforced cylindrical shell under different explosive equivalents, different explosion distances and different laying water depths; determining a dynamic buckling critical load and a buckling mode of the reinforced cylindrical shell under the underwater explosion load by combining a dynamic buckling criterion and annular and axial typical response characteristic space distribution characteristics; and establishing an artificial intelligence proxy model of the dynamic buckling characteristics of the reinforced cylindrical shell under the underwater explosion load. According to the method, different defect amplitudes and rib and skin rigidities under the underwater explosion shock wave and bubble pulsation coupling load can be rapidly given based on the proxy model, the dynamic buckling critical load and modality of the reinforced cylindrical shell under the water depth are laid, and the method has high practicability and engineering significance.

The invention relates to the field of anti-explosion and anti-impact materials, and discloses an underwater anti-explosion and anti-impact flexible composite material which is characterized in that the structure of the composite material is sequentially composed of a high-strength flexible outer layer, a high-energy absorption middle layer and a high-strength flexible inner layer. The high-strength flexible outer layer is made of a single-layer or multi-layer high-performance fiber material with the wave impedance within the range of 1.4 * 10 < 4 >-3 * 10 < 4 > MPa.s / m, the high-energy absorption middle layer is made of a foam material with the wave impedance within the range of 0.1-1.5 MPa.s / m, and the high-strength flexible inner layer is made of a single-layer or multi-layer high-performance fiber material with the wave impedance within the range of 1.4 * 10 < 4 >-3 * 10 < 4 > MPa.s / m. Based on the wave impedance mismatch theory, the high-strength flexible outer layer, the high-energy absorption middle layer and the high-strength flexible inner layer are combined together through the design of the multi-layer composite structure, so that the composite material can provide excellent impact resistance and can effectively absorb and dissipate impact energy.

The invention provides an OpenMP parallel computing method for an underwater explosion LDG numerical model, and belongs to the technical field of computer data processing computing. According to the method, the OpenMP parallel computing method is innovatively introduced into the LDG method to simulate underwater explosion impact cavitation load research. The OpenMP parallel technology is adopted, calculation-intensive tasks in the underwater explosion calculation problem are decomposed to a plurality of cores for cooperative processing, and the defects that in a traditional serial calculation method, the calculation efficiency is low, and the calculation scale is limited are overcome. OpenMP parallel computing of underwater explosion impact cavitation loads is optimized, and two independent auxiliary variable computing tasks in each unit are merged into one OpenMP parallel domain to be executed by merging computing tasks, so that the creation and destruction overhead of the parallel domain is reduced, and the thread synchronization and management overhead is reduced. Meanwhile, the array structure for storing the numerical flux is improved, and the layout of the array in the memory is optimized.

The application provides a seabed energy storage system resisting underwater explosion, comprising: an underwater energy storage unit comprising a plurality of energy storage chambers, a shell unit coated outside the underwater energy storage unit, a support unit comprising a support, a magnetorheological elastic bearing and a magnetorheological elastic energy dissipation module, and a plurality of buoyancy compensation units uniformly distributed between the underwater energy storage unit and the magnetorheological elastic bearing. The energy dissipation module is arranged on a seabed base, the two ends of the bearing are fixedly connected with the top of the energy dissipation module and the bottom of the shell unit respectively, and the two ends of the support are fixedly connected with the bottom of the shell unit and the edge of the seabed base respectively; when the system moves and the shell unit is damaged and separated from the underwater energy storage unit due to the shock wave of underwater explosion, the moving distance of the system is controlled by the movement of the bearing and the energy dissipation module; the buoyancy compensation units provide buoyancy to lift the underwater energy storage unit out of the sea surface. The scheme of the application can improve the anti-explosion ability of the seabed energy storage system, realize system integration and multiple protection, and ensure the safety of deep-sea energy storage.

The invention relates to an underwater explosion numerical calculation load correction method based on a water nonlinear state equation, and belongs to the technical field of underwater structure damage and protection. According to the method, a nonlinear fitting state equation of water is used as a correction object, an initial load curve under a typical three-dimensional underwater explosion working condition is obtained through an ALE numerical calculation method, a theoretical shock wave peak value is divided by an initial numerical shock wave peak value to obtain an initial correction coefficient, C1-C6 in the nonlinear fitting state equation of water is multiplied by the initial correction coefficient, and the initial load curve under the typical three-dimensional underwater explosion working condition is obtained. A corrected result is obtained; due to the fact that parameters of the corrected nonlinear fitting state equation of the water change, the compression ratio of the water at the measuring point changes, the shock wave peak pressure obtained after preliminary correction is lower than the theoretical shock wave peak pressure, repeated iteration correction is needed, and the pressure ratio and the compression ratio in iteration are utilized to calculate the pressure value of the water according to the mutual influence relation between the pressure ratio and the compression ratio in iteration. And a nonlinear fitting state equation parameter correction formula of water is obtained, so that the underwater explosion numerical calculation load meets the engineering application requirement.

The invention provides a prediction method for an impact environment of an underwater distributed vehicle. The prediction method comprises the following steps: determining an underwater explosion impact load acting on the underwater distributed vehicle; based on the underwater explosion impact load, determining a fluid-solid coupling relationship between the underwater distributed vehicle and an external flow field; according to the determined fluid-solid coupling relationship, calculating the finite element model of the underwater distributed vehicle based on an acoustic-solid coupling method of finite element analysis software to obtain rigid body acceleration response of the to-be-measured point; and calculating the relative acceleration response of the to-be-measured point based on the obtained rigid body acceleration response of the to-be-measured point, and deriving an impact spectrum according to the relative acceleration response of the to-be-measured point so as to obtain the impact environment of the to-be-measured point. According to the prediction method provided by the invention, the problems of long actual ship test period and high cost in the prior art are solved, the corrected spectrum displacement is obtained by eliminating the rigid body displacement, and the obtained impact spectrum is high in prediction efficiency and high in precision.

The application provides an underwater explosion shock wave testing device, which comprises a sealed shell and two-way pressure sensors, two-way signal conditioning circuits integrated on a circuit board, a data acquisition and storage module, a communication module and a power module sealed in the shell, wherein: the two-way pressure sensors realize sensing of underwater explosion shock waves and convert the underwater explosion shock waves into electrical signals input to the signal conditioning circuits; the two-way signal conditioning circuits realize adjustment of the sensor output signals and conversion into differential signals; the data acquisition and storage module samples the conditioned shock wave signals, converts the shock wave signals into digital signals and stores the digital signals in real time; the communication module realizes communication and data transmission between the testing device and an upper computer, and the upper computer filters, extracts and analyzes and processes underwater explosion shock wave data; and the power module supplies power for operation of the testing device. The application can more accurately complete measurement and save data, calculate and analyze underwater explosion power, and has a good application prospect.

The invention relates to a multi-layer composite protection and energy dissipation system for an island reef to resist underwater explosion and an installation method. The multi-layer composite protection and energy dissipation system comprises an island reef body; the energy dissipation layer is annularly arranged on the periphery of the sea island reef disc body at intervals of a preset space and comprises an elastic energy absorption part and an energy dispersion framework, the elastic energy absorption part is arranged on the outer side of the energy dissipation layer, and the energy dispersion framework is arranged on the inner side of the energy dissipation layer and fixedly connected with the elastic energy absorption part; the active energy dissipation layer is annularly arranged between the energy dissipation layer and the sea island reef plate body and comprises an early warning system and a plurality of bubble generating devices, the early warning system is associated with the bubble generating devices, and the early warning system is suitable for monitoring underwater explosion signals and triggering the bubble generating devices to release bubbles to form a bubble curtain; the bubble curtain is adapted to dissipate residual energy through the energy dissipation layer. The system has the outstanding characteristics of multi-layer energy absorption, intelligent monitoring and active defense, can be widely applied to protection of the bottom of the sea island reef disc, and effectively resists impact of underwater explosion on the sea island foundation.

The invention discloses a metal material surface modification device through underwater explosion, and relates to the technical field of metal material surface treatment.The sealing shell comprises an inner barrel and an outer barrel which are coaxially arranged, an outer cavity is formed between the inner barrel and the outer barrel, and the two ends of the outer barrel are provided with an upper end cover and a lower end cover which are detachable respectively; an inner cavity is formed between the inner barrel and the upper end cover and between the inner barrel and the lower end cover, the adjusting mechanism comprises a depth adjusting assembly and two distance adjusting assemblies, and the depth adjusting assembly can slide in the axis direction of the inner barrel. The distance between the two to-be-modified metal materials is controlled through the arranged distance adjusting assembly, a metallurgical bonding interface can be formed easily, the deformation degree and the mutual embedding depth of the metal under explosion impact are controlled accordingly, the residual energy generated when explosion energy is transmitted to the surfaces of the metal materials is accurately adjusted through the arranged depth adjusting assembly, and the metal materials are modified. The quality problem caused by improper energy is avoided while it is ensured that the metal material obtains enough energy to achieve surface modification.

The invention discloses an underwater explosion shock wave load probability characterization method based on Bayesian inference, and relates to the field of underwater explosion load calculation, and the method comprises the steps: obtaining previous test data, carrying out the analysis processing of the test data, obtaining sample data, taking a Cole empirical model as a prior model of Bayesian inference, and carrying out the calculation of the probability of the underwater explosion shock wave load. Performing uncertainty analysis on load characterization parameters and calculation errors of the prior model in combination with the sample data to obtain target probability distribution of the load characterization parameters and the calculation errors; and by taking the target probability distribution as priori knowledge, carrying out updating calculation on the load characterization parameters and calculation errors by adopting a Bayesian inference method to obtain a Bayesian probability model of the underwater explosion shock wave load. And carrying out probability representation on the underwater explosion shock wave load based on the Bayesian probability model of the underwater explosion shock wave load. According to the method, the uncertainty of the underwater explosion shock wave load is effectively represented, and random input considering the load variability is provided for the anti-explosion reliability design of the underwater structure.

The invention relates to a distributed underwater explosion impact test device. The device comprises a water tank, a distributed mounting rack, a detonation assembly, a sample fixing assembly and a counterweight assembly, the distributed mounting frame is arranged in the water pool and is provided with a plurality of connecting ends which are circumferentially arranged along the central axis of the distributed mounting frame, and each connecting end can move in the direction close to or away from the central axis of the distributed mounting frame; the detonating assembly is arranged in the middle of the multiple connecting ends, and the detonating assembly is connected with the bottom of the distributed mounting frame; the sample fixing assembly is provided with a plurality of sample fixing ends for fixing samples, and the plurality of sample fixing ends are connected with the plurality of connecting ends of the distributed mounting rack; the counterweight assembly is detachably arranged on the distributed mounting frame; compared with a traditional single-station and multi-time detonation test mode, the explosion pool starting frequency and explosive consumption are remarkably reduced, the test efficiency is improved, and the comprehensive test cost is reduced.

The application provides an underwater explosion high-efficiency energy-gathering cutting device based on combined charge, which comprises two semi-ring energy-gathering charge structures arranged underwater and two positioning devices, the positioning devices are connected with the semi-ring energy-gathering charge structures through connecting devices, and the outside of the semi-ring energy-gathering charge structures is connected with detonators; the two positioning devices are arranged outside the cutting position of a target tubular structure, and the two positioning devices are fixed with each other; the two semi-ring energy-gathering charge structures are arranged outside the cutting position of the target tubular structure, and the two semi-ring energy-gathering charge structures are fixed with each other, and each semi-ring energy-gathering charge structure comprises a plurality of equal cutting units. The cutting end face formed by the application has high smoothness, the fine level of underwater explosion cutting is improved, the application is suitable for cutting the tubular structure with any direction and structure parameter on the seabed, deep water cutting operation can be realized, and the application can also cut the structure with rigid body displacement after the explosion of flexible bodies such as steel cables, optical cables and cables on the seabed.

The invention relates to a numerical calculation method and device for buckling instability of a cylindrical shell structure, and belongs to the technical field of marine engineering, the numerical calculation method for buckling instability of the cylindrical shell structure comprises the steps of constructing a reinforced cylindrical shell geometric model and a water area model, and constructing a deepwater explosion model based on the reinforced cylindrical shell geometric model and the water area model; acquiring a load time history curve in a deepwater explosion scene, applying an explosion load to the deepwater explosion model based on the load time history curve, and performing numerical simulation on the deepwater explosion model by taking set boundary conditions, fluid-solid coupling and acoustic parameters of the deepwater explosion model as simulation conditions to obtain a simulation calculation result of buckling instability of the reinforced cylindrical shell. The load time history curve is used for representing underwater explosion shock waves and bubble pressure load values, and the dynamic response and structural damage characteristics of the reinforced cylindrical shell under the combined action of multiple loads are accurately reflected.

The utility model belongs to the technical field of underwater explosion and damage tests, and relates to a device for an underwater distance-adjustable power test, which comprises a floating platform support and a floating platform body, the floating platform body is provided with a lifting lug and a lifting frame, the lifting frame is connected with a hand-cranking hoist, the hand-cranking hoist is connected with a lifting rope, the lifting rope penetrates through the floating platform body and is connected with an effect target, and the effect target is connected with the lifting lug. The effect target is provided with an adjusting assembly, the adjusting assembly is connected with a bracket, and the bracket is fixedly connected with a warhead. According to the utility model, the warhead is fixed at a specific position of the effect target through the bracket, and explosion experiments at different distances are realized through distance adjustment. The test device system is simple to manufacture and convenient to operate, can meet the power test of the warhead at different underwater distances, greatly reduces the test cost, and improves the test efficiency.

The invention relates to the technical field of ship protection materials, and discloses a beetle elytra-layer-imitated sandwich plate and a preparation method thereof.The beetle elytra-layer-imitated sandwich plate comprises two damping layers, and each damping layer comprises a first base plate, a second base plate and at least two first supporting pieces; the first substrate and the second substrate are arranged at intervals in the height direction; a mounting cavity is formed in a gap between the first substrate and the second substrate, and the mounting cavity is divided into a plurality of filling spaces by the first supporting pieces; each filling space is filled with an elastic material; the shock absorption layer comprises a plurality of first supporting pieces, the anti-explosion layer comprises a plurality of second supporting pieces, the second supporting pieces are arranged in the horizontal plane at intervals, the outer surface of each second supporting piece is provided with a fiber bionic layer imitating beetle elytra design, and the shock absorption layer and the anti-explosion layer jointly form a damping-energy absorption-blocking synergistic mechanism; and the overall resistance of the inter-board protection system to threats such as underwater explosion shock waves and bubble pulsation is remarkably improved.

The application discloses a method and equipment for predicting underwater explosion bubble movement based on a two-phase flow interface, relates to the technical field of numerical simulation of underwater explosion bubble jet, and comprises the following steps: determining a calculation domain corresponding to a charge, and dividing the calculation domain into multiple calculation units; performing the following movement parameter value calculation process on each calculation unit: obtaining a previous movement parameter value corresponding to a previous time step; obtaining a current movement parameter value by using a control equation and a parameter correlation equation; and analyzing movement parameters of each calculation unit corresponding to each time step to obtain a distribution of the movement parameters, wherein the distribution is used to represent a bubble movement condition in an underwater explosion process. The application is used to solve a series of problems in the prior art when predicting underwater explosion bubble movement, and realizes bubble movement prediction in various scenes and various stages of underwater explosion.

The invention discloses modularized underwater explosion multi-scene environment simulation equipment, and aims to solve the technical problems that an existing underwater explosion environment simulation device is single in simulation environment, single in simulation load and high in cost. The device specifically comprises a water tank, a wave effect explosion environment simulation module and the like. The water tank comprises a bottom plate, side plates and a tempered glass plate; the side plates and the tempered glass plate are located on the bottom plate and arranged around the bottom plate, and an environment simulation cavity is formed among the bottom plate, the side plates and the tempered glass plate; a light window is arranged on the side plate; sealing plates are arranged on the inner sides of the light windows; the sealing plates are detachably connected with the side plates; the shallow water explosion environment simulation module, the deep water explosion environment simulation module or the wave effect explosion environment simulation module are detachably connected with the water tank and used for simulating a shallow water explosion environment, a deep water explosion environment or a wave effect explosion environment.

The utility model relates to the technical field of underwater explosion tests, and discloses a device for an underwater explosion test, which comprises an explosion-proof steel drum and a supporting groove seat poured on the ground, a plurality of rubber wheels are placed in the supporting groove seat, the explosion-proof steel drum is placed on the rubber wheels, a plurality of fixing sleeves are fixedly mounted on the outer wall of the peripheral side of the explosion-proof steel drum, and the fixing sleeves are fixed on the supporting groove seat. A fixing rope is arranged in the fixing sleeve in a penetrating manner; according to the utility model, the supporting groove seat is poured, the rubber wheel is placed in the supporting groove seat, the explosion-proof steel drum is placed on the rubber wheel, and the explosion-proof steel drum is tensioned by utilizing the fixing rope to be matched with the fixing sleeve and the first fixing plate fixed on the ground through the first ground nail, so that explosive is placed in the explosion-proof steel drum to carry out an underwater explosion test; the explosion-proof steel drum is matched with the rubber wheel for buffering, the fixing rope is used for tensioning the explosion-proof steel drum, then vibration generated by explosive exploding in the explosion-proof steel drum is released through the rubber wheel, and damage to surrounding buildings and adjacent stratums caused by underwater explosion is reduced.

This invention discloses a wearable underwater explosion impact protection device with an external spherical structure, including a protective module and a rope fastener. The protective module is arranged along the length of the protected structure, and the rope fastener is fixed to the protected structure. The rope fastener tightens the protective module to the protected structure, so that the protective module fits the geometric shape of the protected structure to form a wrap-around fit. When the shock wave and bubble pulsation load generated by the underwater explosion are applied, the shock wave blocking component absorbs part of the energy of the oncoming shock wave through its own deformation. The shock-resistant spherical structure is filled with air to block the propagation of the shock wave, greatly weakening the intensity of the shock wave. In addition, after one or more shock wave blocking components undergo large deformation or damage, the protective function can be efficiently restored through rapid disassembly and reassembly, solving the problem of the main structure being in a high-risk state for a short period of time after a disaster.

The invention relates to the technical field of explosion mechanics, fluid dynamics, multiphase flow, ocean engineering and experimental mechanics, in particular to a coupling test method and system for a wave load and an explosion physical field under a high gravity field. According to the time difference between wave movement and detonation, the wave stabilization time and the wave period, the phase where explosion is located is adjusted; wave parameter data and explosion load data in the coupling test are collected. The device can be used for expanding and researching other high-speed fluid dynamics problems, experimental simulation and observation of the full-physical process of underwater explosion under the combined action of a super-gravity field and a wave load are achieved, and an underwater explosion scene in a sea wave environment can be simulated more truly.

The invention discloses an auxiliary underwater explosion cutting system for an underwater vehicle, which relates to the technical field of ocean engineering and underwater equipment and comprises an AUV (Autonomous Underwater Vehicle) carrying platform, an annular cutter module, an intelligent control system and a pipeline, the AUV carrying platform is used for carrying the intelligent control system and mounting the annular cutter module on the pipeline; the annular cutter module is in signal connection with the intelligent control system; the intelligent control system is used for controlling detonation of the annular cutter module. Through the heavy AUV carrying platform which is modularly designed, high-precision navigation, multi-modal detection and intelligent control technologies are combined, and an innovative diameter-adjustable annular cutter is adopted, so that the problems of efficiency, precision and environmental adaptability of a traditional underwater cutting technology are solved. Rapid and accurate adjustment is achieved through a self-adaptive locking mechanism, the energy gathering effect is improved and the explosive loading amount is reduced through a V-shaped unit body explosive loading structure, and operation safety is ensured through a triple safety interlocking mechanism and a shock wave buffering design.

The present application discloses a method for predicting underwater explosion bubble motion based on grid adaptive discontinuous galvanometer, which relates to the field of underwater explosion technology. In the framework of underwater explosion bubble motion prediction based on discontinuous galvanometer, the method determines the solution resolution of each grid unit according to the underwater explosion bubble motion prediction result at each grid adaptive adjustment moment, and adjusts the grid division result based on the adjustment target of improving the solution resolution to enter the solution at the next forecast moment. The grid adaptive adjustment method can effectively improve the prediction accuracy, thereby achieving higher-precision result capture in the process of underwater explosion shock wave propagation and bubble motion, providing important support for interface capture of underwater near-field explosion process.

The invention discloses an underwater explosion impact protection test device and method, and the device comprises a floating impact platform, a deck structure, an anti-impact facility, and a dummy model. The floating impact platform is configured in a test water area; the deck structure is arranged on the floating impact platform and is used for simulating a ship deck; the anti-impact facility is arranged on the deck structure and is used for simulating deck protection; the dummy model is provided with a sensing detection module and is configured to be protected by the anti-impact facility. Based on the technical scheme disclosed by the invention, the impact response information on the dummy model can be recorded in real time so as to effectively test the protection performance of the anti-impact facility, the operation is simple, the application scene is wide, the method can be close to the actual underwater explosion impact environment, and the test reliability is greatly improved.