31 results about "Underwater explosion" patented technology

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 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 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 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 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.

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 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.

The application relates to a large-scale underwater explosion problem, in particular to a calculation method of underwater explosion load based on an LDGM and MPI. The calculation method of underwater explosion load based on the LDGM and MPI comprises the following steps: performing non-structural grid division on a water area geometric model, calculating data in the non-structural grid after spatial discretization and time discretization according to a LDGM second-order wave equation, performing regional decomposition by using METIS during the calculation process, dividing the non-structural network into multiple subdomains and distributing the subdomains to different processors, exchanging numerical flux on the subdomain boundaries between the processors, performing parallel processing, until time domain loop calculation is completed, and obtaining a pressure field of a flow field evolving with time. The LDGM is used to solve the flow field pressure load, can more accurately capture the strong gradient of a shock wave and local details of a cavitation area, avoids numerical dissipation and oscillation problems, and improves calculation efficiency through a parallel processing scheme.

The invention relates to an underwater explosion test method and device, a storage medium and electronic equipment, and particularly relates to the technical field of tests.The method comprises the steps that firstly, an underwater explosion test model corresponding to ship equipment to be tested is determined according to actual explosion test data of the ship equipment to be tested, the underwater explosion test model comprises an equipment model obtained by performing equal-proportion modeling on the to-be-tested ship equipment; in response to a received underwater explosion test instruction, generating a virtual shock wave by using an explosive model in the underwater explosion test model, so that the virtual shock wave is conducted to the equipment model through a fluid in the underwater explosion test model; then impact power detection is carried out on the equipment model receiving the impact, and impact response data of the equipment model after the impact is obtained; and finally, based on the strength criterion of the to-be-tested ship equipment and the impact response data, obtaining an underwater explosion test result of the to-be-tested ship equipment.

The application relates to a kind of deep water explosion under reinforced cylindrical shell structure indentation deformation calculation method, belong to the technical field of underwater explosion.It is determined by model overall parameter, boundary condition is determined according to the characteristics of reinforced structure, the calculation of deep water explosion load, including shock wave, multiple bubble pulsation load, the differential equation of shell plate motion is established to solve indentation deformation and the final deformation is calculated according to the static water pressure work correction deformation deflection;Among them, boundary treatment is divided into three types of fixed boundary, elastic support boundary and mixed boundary;Load processing considers the coupling effect of shock wave load, multiple bubble pulsation load and static water pressure.The application considers comprehensive factors, quickly evaluates deformation, and provides important support for subsequent evaluation of the dynamic response of reinforced cylindrical shell structure under deep water explosion.

The invention provides a protection system and method for a large dock gate. The protection system comprises a monitoring module, an interception module, an energy consumption module and a repair module. The monitoring module is arranged in a water area in front of a dock gate to monitor the water area in real time and identify underwater explosion shock waves; the interception module is arranged in a foundation in front of a dock gate and comprises a foundation groove formed in the foundation and a protective net contained in the foundation groove. When shock waves are monitored, the protective net pops up from the foundation groove and is unfolded, and the shock waves are buffered for the first time; the energy consumption module comprises a plurality of energy consumption units which are evenly laid on one side of the upstream face of the dock gate and conduct secondary buffering on shock waves. The repairing module comprises a displacement monitoring and compensating unit, the displacement monitoring unit monitors the straightness of a rack in the transmission mechanism in real time, and when the straightness of the rack is not smaller than a deviation threshold value, the displacement compensating unit generates compensating displacement for recovering the straightness of the rack. According to the scheme, the anti-explosion capacity of the dock gate is remarkably improved, and the service life is remarkably prolonged.

The invention discloses a near-field detonation pressure testing device based on liquefied air phase change rock breaking and a using method, and the near-field detonation pressure testing device based on liquefied air phase change rock breaking comprises a testing cylinder, a liquefied air energy storage module, a pressure measuring module and a triggering module. The using method is based on the liquefied air phase change rock breaking near-field detonation pressure testing device. According to the method, an underwater explosion pressure wave exponential attenuation characteristic is utilized, explosion peak pressure of different near-field distances is measured, a pressure wave attenuation formula is solved, a theoretical value of explosion center peak detonation pressure is obtained through calculation, and the near-field detonation pressure testing capability and precision are remarkably improved; the problem that the test result is difficult to convert into the detonation center detonation pressure due to the gas compression and complex phase change process in the traditional liquefied air energy storage tube detonation pressure test is effectively solved.

The invention belongs to the technical field of aerospace, underwater explosion and topological optimization, and particularly relates to an anti-explosion impact structure optimization method considering material damage, which comprises the following steps of: firstly, acquiring a dynamic response field of a structure through accurate nonlinear dynamic response analysis, judging a failure block and failure time of the structure according to the dynamic response field, and finishing displacement field repair; decoupling the response of the nonlinear dynamics in each time step into a series of linear statics responses; structural sensitivity calculation is carried out in a linear statics framework, and optimization design is realized through flexibility minimization under a statics equivalent working condition; and through repeated iteration and execution of accurate nonlinear dynamic response analysis and the equivalent statics optimization process, the optimization design of the anti-explosion impact structure is finally completed. According to the invention, a user can be helped to quickly explore and obtain a novel structure with high rigidity, light weight and excellent impact resistance in a wide design space.

The invention provides a grillage structure underwater explosion response prediction method and system based on parametric modeling, and relates to the technical field of ship and ocean engineering structure safety assessment, and the method comprises the steps: constructing a test parameter set; inputting the test parameters into finite element simulation software in batches to obtain a response data set, wherein the response data set comprises multiple groups of response data; constructing each group of response data and the corresponding test parameters into a group of training data to obtain a training data set; training the random forest model through test parameters and rupture labels in the training data set to obtain a rupture prediction model; and training the gradient lifting regression tree model through test parameters, the maximum equivalent stress value, the maximum equivalent plastic strain value, the maximum deformation displacement value and the crevasse area in the training data set to obtain a physical response prediction model. The response prediction speed can be greatly increased through parametric modeling and model prediction, and the trained prediction model does not depend on a grid structure and has very high generalization ability.

This invention discloses a numerical simulation analysis method for the dynamic effects of underwater explosions along two paths on concrete dams, belonging to the field of engineering protection and numerical simulation technology of explosion effects. The method first establishes a multi-medium fully coupled model including the concrete dam, foundation, water, air, and explosive. A Lagrange-Euler fully coupled method is used to achieve fluid-structure interaction. Gravity and hydrostatic pressure are applied to simulate the initial stress field, and monitoring points are set up. Then, single-path load simulations are conducted with rigid partitions in the water body and foundation, while a fully coupled baseline simulation without partitions is performed simultaneously. Data on dam pressure, vibration velocity, and displacement under the three conditions are compared to separate the characteristics of the dual-path loads and the structural response. Finally, multi-condition analysis is conducted by controlling key parameters such as the explosion center distance using single-variable control to reveal the evolution law of the dual-path effect and the conditions for the conversion of the dominant mechanism, and to quantitatively evaluate the contributions of both. This method provides a controllable and repeatable numerical means for the differential response analysis of underwater explosion load paths in concrete dams, and provides a theoretical basis for the refined blast-resistant protection design of dams.

The application provides an OpenMP parallel computing method of a numerical model of underwater explosion LDG, and belongs to the technical field of computer data processing and computing. The application innovatively introduces the OpenMP parallel computing method into the LDG method to simulate underwater explosion shock cavitation load research. The OpenMP parallel technology is adopted to decompose the calculation-intensive task in the underwater explosion calculation problem to multiple cores for cooperative processing, and overcomes the defects of low calculation efficiency and limited calculation scale in the traditional serial computing method. The OpenMP parallel computing of the underwater explosion shock cavitation load is optimized, two independent auxiliary variable calculation tasks in each unit are combined into one OpenMP parallel domain for execution, the creation and destruction overhead of the parallel region is reduced, and the thread synchronization and management overhead is reduced. Meanwhile, the array structure of the storage numerical flux is improved, and the layout in the memory is optimized.

The invention discloses a submarine damage model device for carrying out large-water-depth underwater explosion in a limited water area and a test method, and belongs to the field of model tests. The model device comprises a pool, a testing device, a free field pressure sensor and an explosion source, the testing device is arranged in the water tank, and an explosion source fixed by an explosion source positioning rod is arranged on one side of the testing device; the testing device comprises an anti-impact buoy and a submarine target, and the anti-impact buoy suspends the submarine target in a pool through a load-bearing steel wire rope and is located on the surface of the pool. Ballast connected through a load-bearing steel wire rope is arranged at the bottom of the submarine target. Free field pressure sensors which are connected with the anti-impact buoy through a free sensor laying device are arranged around the testing device. The problem that the submarine structure is impacted and damaged by the load under the action of deepwater explosion impact is solved, and the device can be repeatedly used, is easy to control and convenient to disassemble, and reduces the experiment cost.

The invention discloses a deepwater explosion numerical calculation method suitable for different explosives, which comprises the following steps of: aiming at an explosive of a certain model, solving an underwater explosion process of the explosive under a free field condition, and inputting parameters of a JWL state equation given in a document; comparing the pressure time-history curve obtained by numerical calculation with a test pressure time-history curve under the shallow water working condition, and correcting material parameters in the JWL state equation to enable the two to be matched; the corrected material parameters serve as inherent physical attributes of the explosive, water depth parameters in the calculation model are modified into target water depth values, calculation is executed on the basis of the inherent physical attribute parameters, and a deepwater explosion load time history curve is obtained; taking the deepwater explosion load as an input load of the finite element model, and establishing a finite element structure model for deepwater explosion response analysis; and calculating the dynamic response of the structure. According to the method, research on dynamic response of the integrated underwater explosion structure in large water depth or damage power of different explosives can be carried out at low cost, and the universality of numerical calculation is remarkably improved.

The invention discloses a double-stage energy control charging structure and method for underwater explosion icebreaking, and belongs to the technical field of underwater explosion engineering equipment. According to the method, shock wave energy and bubble energy which are coupled in traditional explosion are decoupled and coordinated in time and function, and the method comprises the following steps: firstly, detonating a preceding-stage explosion source which mainly comprises the shock wave energy, and carrying out presplitting and crushing on an ice layer; and then, the optimal time delay is calculated based on the preceding-stage bubble pulsation period theory, a backward-stage explosion source with bubble energy as the main is detonated after the time delay, and the crushed ice is thoroughly pushed away through water jet generated by bubble expansion and collapse. The matched integrated charging structure comprises a front-stage charging part, a rear-stage charging part, an acoustic impedance gradient explosion suppression part and a high-precision electronic delay detonation system, and reliable isolation and precise time sequence control of double explosion sources are guaranteed. The ice removal device has the remarkable effects of regular crevasse shape, thorough ice removal and high energy utilization rate.

The application discloses a flexible cover layer for inhibiting underwater bubble jet load and a manufacturing method thereof, and comprises a flexible cover layer, a rubber outer layer and a closed-cell foam sandwich layer; the rubber outer layer and the closed-cell foam sandwich layer are pasted to form the flexible cover layer; the other side of the closed-cell foam sandwich layer is pasted to a cabin wall or a side plate of an underwater vehicle; the rubber outer layer supports and protects the closed-cell foam sandwich layer, and prevents the closed-cell foam sandwich layer from being torn under the action of explosion impact due to the thin single foam wall; the manufacturing method comprises the following steps: obtaining material parameters through experiments, obtaining explosion load information through a scaled-down experiment; presetting the thickness of each layer, coupling numerical solutions of compressible fluid models and incompressible fluid models with a finite element structure model, performing finite element numerical calculation, optimizing the structure thickness according to the finite element calculation result, and manufacturing the flexible cover layer according to the thickness. The application has the advantages of better absorbing shock wave energy generated by underwater explosion and inhibiting and blocking the impact of high-speed bubble jet load.

A probabilistic representation method for underwater explosion shock wave load based on Bayesian reasoning is disclosed, relating to the field of underwater explosion load calculation. The method is based on Bayesian probability models of underwater shock wave loads, and performing probability representations of underwater explosion shock wave loads. The method is used to effectively represent uncertainty of underwater explosion shock wave loads, and to provide random inputs for modeling load variability for the design of explosion-proof underwater structures.

The application discloses a kind of different scale model impact environment equivalent effect evaluation method and system, comprising: the similarity law of underwater explosion is derived by dimensional analysis, the relationship of shock wave pressure, energy impulse, energy density and charge mass and blast center distance is established.Based on Hopkinson similarity law, a scaled experimental model is designed, and nonlinear scaling optimization is carried out.The application has the advantages that: by dimensional analysis and similarity law, the relationship between the model and the actual environment is accurately established.Using Hopkinson similarity law and nonlinear scaling, the reliability of the model response is ensured.The technical obstacles of data integration and sharing of different scale models are effectively solved.Provide scientific and reliable technical support for engineering design and environmental assessment.

The invention relates to the problem of large-scale underwater explosion, in particular to an underwater explosion load calculation method based on a discontinuous Galerkin method and MPI. The underwater explosion load calculation method based on the discontinuous Galerkin method and the MPI comprises the following steps: performing unstructured grid division on a water area geometric model, calculating data in an unstructured grid subjected to spatial discretization and time discretization according to an LDGM second-order wave equation, performing regional decomposition by utilizing METIS in the calculation process, and calculating the underwater explosion load according to the LDGM second-order wave equation; and dividing the non-structural network into a plurality of sub-domains and distributing the sub-domains to different processors, exchanging numerical flux on the boundaries of the sub-domains among the processors through MPI, and performing parallel processing until the time domain circulation calculation is completed, thereby obtaining the pressure field of the flow field evolving along with the time. According to the method, the LDGM is used for solving the pressure load of the flow field, the strong gradient of shock waves and local details of a cavitation area can be more accurately captured, the problems of numerical dissipation and oscillation are avoided, and the calculation efficiency is improved through a parallel processing scheme.

The application discloses an underwater explosion visualized experiment auxiliary measuring device, which comprises an observation cylinder, a positioning bottom cylinder and a pulley set. The observation cylinder is located in the middle of the positioning bottom cylinder and comprises a top plate, a support plate and a suspended plate. The top plate is supported by the top ends of two vertically and parallel arranged support plates and is bonded by UV glue. The suspended plate is vertically bonded on the two sides of the support plate and the top plate by UV glue. The positioning bottom cylinder comprises a positioning long plate and a positioning short plate. The positioning long plate is arranged at the two ends of the cylinder surface of the positioning bottom cylinder, and the positioning short plate is arranged at the bottom of the cylinder. The pulley set comprises a front wheel, a rear wheel, a bottom wheel and a three-hole plate. The front wheel, the rear wheel and the bottom wheel are fixed on the three-hole plate through bearings and support rods. The three-hole plate is bonded on the two sides of the positioning bottom cylinder by UV glue. The device is used in combination with a high-pressure spark bubble preparation device to fix the bubble preparation position, improve the repeatability of the experiment and reduce the error caused by the experiment device.

The invention relates to a regulation and control method for upward jet flow of underwater explosion bubbles in a limited area. The invention relates to the technical field of ship structure protection and fluid dynamics application. The method comprises the following steps: inputting initial conditions of underwater explosion and distances between explosives and boundaries of upper and lower water areas; according to an underwater explosion empirical formula, the scale of bubbles is calculated, and distance parameters are nondimensionalized; according to the position of the explosive, an expression that bubbles reach the critical condition of upward jet flow is designed, and the expression is corrected through a bubble jet flow direction database established through numerical simulation; according to the position of the explosive, the dimensionless distance parameter and the buoyancy parameter are substituted into the corrected expression for calculation; and judging the upward jet flow of underwater explosion bubbles according to a calculation result, and further changing parameters to perform active regulation and control. According to the invention, the problem of regulating and controlling the upward jet flow behavior of the underwater explosion bubbles in the limited area in the existing engineering and scientific research activities is solved.

The invention discloses an underwater explosion shock wave loading device and method based on an electromagnetic rod, and aims to solve the problem that a dynamic response test of a target body under explosion shock cannot be effectively carried out underwater in an existing underwater explosion shock recording mode. The device comprises an electromagnetic driving system, a stress wave generator and a waveguide rod, the electromagnetic driving system and the stress wave generator form a closed loop through a high-voltage cable, so that the stress wave generator generates axial stress waves, and the axial stress waves are spread to a target body in an underwater test cabin through the waveguide rod; distributed sensing detection systems used for collecting data are arranged in the waveguide rod and the underwater test cabin. An electromagnetic driving mode is adopted, axial stress waves are generated through cooperation of the electromagnetic driving system, the stress wave generator and the waveguide rod, the axial stress waves are spread to the target body in the underwater test cabin, and therefore a dynamic response test of the target body under underwater explosion impact is carried out.

This application discloses an underwater explosive bubble water jet pressure field measurement system, relating to the field of water jet pressure field measurement technology. The system includes: a PVDF array pressure sensor, a data acquisition unit, and a host computer. The host computer generates a trigger signal and sends it to the data acquisition unit. The data acquisition unit generates two three-dimensional control signals based on the trigger signal, controlling the closing of one row and one column of analog switches in the switching module. This allows the acquisition module to collect the pressure generated by the underwater explosive bubble water jet through the sensing element and sends the pressure to the host computer. The host computer receives the pressure and processes it based on preset data processing logic. This application aims to solve the problem of poor measurement results in existing technologies when measuring the pressure field of explosive bubble water jets, achieving high-precision acquisition and analysis of microsecond-level water jet pressure fields.

This invention provides an underwater explosion test apparatus and method for a sealed concrete shell. The test apparatus includes a concrete shell, a support, a water tank, and explosives. The water tank is filled with water, and the concrete shell is fixed inside the water tank by the support. The explosives are positioned above the concrete shell. This test apparatus improves the sealing performance and overall structural rigidity of the concrete shell, preventing water seepage during the test from affecting measurement accuracy. The support and counterweight plate work together to prevent the concrete shell from floating under the upward buoyancy generated by the explosion, ensuring the smooth conduct of the test. AB glue is used to attach the velocity / accelerometer, ensuring reliable operation and acquisition of real time history signals under detonation loading. Bubble film is arranged on the sidewalls of the water tank to form a water-air-water interface during the test, significantly attenuating the peak value of the shock wave, thereby protecting the sidewalls of the water tank and extending the service life of the test site.

The application provides a simulation method and system for deep water explosion impact resistance of a large-depth underwater vehicle, and the method comprises the following steps: obtaining underwater vehicle external geometric data and target structure region, and obtaining structure material parameters; calculating a deep diving static water pressure, an equivalent static pressure distribution of the target structure region, and establishing a prototype simulation model and a scale-down test model; performing a test to obtain simulated structure surface pressure, simulated structure strain time curve, simulated bubble motion trajectory and scale-down strain data; based on the above data, constructing a static water pressure term, an impact wave and a bubble pulsation pressure time term, and superimposing and constructing a joint load simulation model, and then obtaining an error, and if the condition is met, the simulation is completed. The simulation method for deep water explosion impact resistance of the large-depth underwater vehicle can dynamically couple high static water pressure, underwater explosion shock wave and bubble pulsation, so as to realize precise simulation of the deep water explosion impact load resistance of the large-depth underwater vehicle structure.