69 results about "Underwater blast" patented technology

The invention discloses a digitization-based sensitive area underwater blasting safety early warning method and system, and the method comprises the steps: obtaining multi-dimensional physical parameters of an underwater blasting environment, the physical parameters comprise pressure, temperature, sound waves, vibration and the like, arranging a high-sensitivity anti-interference sensor array at a key monitoring point, and obtaining the physical parameters; performing preliminary denoising processing on the original data acquired by the sensor array, and filtering environmental noise and errors of the sensors to obtain pure monitoring data; performing efficient compression on the denoised monitoring data, and retaining key feature information; extracting features from the compressed data, and screening feature vectors having significant influence on the blasting process; and inputting the extracted feature vector into a preset machine learning model, judging an abnormal state in a blasting process in real time by adopting the machine learning model, and outputting an abnormal early warning signal.

The invention discloses an explosion source mounting device for an underwater icebreaking test, and belongs to the technical field of underwater explosion tests. The device is composed of an on-ice fixing assembly, a first telescopic rod assembly, a second telescopic rod assembly, a 90-degree rotating assembly and an explosive fixing structure. The on-ice fixing assembly is connected with the first telescopic rod through a clamping structure, the two telescopic rods are connected through a 90-degree rotating assembly comprising a transmission screw, a supporting bearing and a transmission shaft system, and accurate angle adjustment of the second telescopic rod is achieved in cooperation with the limiting supporting structure. Wherein the transmission screw and the supporting bearing are fixed to form a rotational degree of freedom, the transmission rod is driven to move through thread linkage, and 90-degree directional rotation of the second telescopic rod is achieved through multi-shafting transmission. According to the invention, the problems of difficult installation and positioning deviation in a complex ice surface environment are solved, and the operability of an underwater explosion icebreaking test and the credibility of a test result are improved.

The invention discloses a digital twinning-AI prediction driven cofferdam directional micro-blasting system, which relates to the technical field of underwater blasting engineering, and comprises the following steps of: constructing multi-domain digital twinning, reading a compliance rule machine by a loading machine, fusing a hydrophone array, shore-based vibration and distributed optical fiber observation assimilation to form a baseline field; defining an isobaric surface leakage volume, a sector deflection angle, a closure degree and a frequency band energy ratio, and establishing two sets of equivalent boundary admittances and preselection of a switchable physical layer; training a multi-output AI element model, combining opportunity constraint and hard constraint, performing linkage optimization on a physical layer and a detonation network, and generating a linkage instruction and a sensitivity atlas; and small-dose trial explosion is executed by a hierarchical correction state machine, and on-line guarding and knowledge writing-back are carried out in combination with sequential ratio test and quantile tracking. And minute-level interpretable prediction can be realized, leakage and direction drift are inhibited, the safety of an ecological structure is guaranteed, and the construction period and the cost are reduced.

The utility model discloses a high-speed camera remote control system based on an underwater explosion impact test. The system comprises an underwater high-speed camera, underwater lighting equipment, a watertight composite cable, an underwater high-speed camera front-end control system, a network switch and a high-speed camera terminal control acquisition system. The high-speed camera terminal control acquisition system is located on a shore-based observation platform, and the underwater high-speed camera front-end control system is located on an underwater test platform; the high-speed camera terminal control acquisition system is in communication connection with the underwater high-speed camera front-end control system through the network switch; and outside the pressure-resistant cabin, a watertight composite cable penetrates through a shell to connect the underwater high-speed camera and the underwater lighting equipment with equipment of a front-end control system of the underwater high-speed camera. By arranging an underwater high-speed camera front-end control system, automatic data acquisition, local storage and remote transmission are supported; and the stability and reliability of data acquisition of the high-speed camera are ensured.

The invention provides an automatic compensation floating experiment device and method for an underwater test, and the device comprises an automatic compensation device which is installed above a floating water tank, the floating water tank is connected with a suspension water tank through a vibration absorption device, and the suspension water tank is connected with a steel wire rope winding and unwinding device; a water level detection device and a posture detection device are respectively mounted in the floating water tank and the suspension water tank; the automatic compensation device comprises an upper cover, the upper cover is arranged on a mounting shell in a sleeving mode, two sets of crossed ball screws are mounted in the mounting shell, one end of each ball screw is connected with a fixed support, the other end of each ball screw is connected with a servo motor through a coupler, and each ball screw is provided with a flange through a bolt. By adjusting the length of the steel wire rope and the position of the suspension water tank, different cabin parameters are simulated, an underwater explosion test is carried out, the accuracy of test data is effectively improved, the service life of equipment is effectively prolonged, and the scientific research cost is reduced.

The invention discloses a waterproof and pressure-resistant acceleration impact sensor, and relates to the technical field of impact detection, the waterproof and pressure-resistant acceleration impact sensor comprises a base, the bottom of the base is provided with a mounting screw groove, the top of the base is fixedly provided with a supporting stud, the outer ring of the supporting stud is sleeved with an inner protective shell in a threaded manner, and the inner protective shell is internally provided with a sensitive element. The device comprises an inner protective shell, the outer side of the inner protective shell is wrapped with an outer protective shell in a protective mode, a buffer reset mechanism is installed at the top of the outer protective shell, and an outer ring damping mechanism is installed in the buffer reset mechanism. The waterproof sealing performance, the impact resistance and pressure resistance and the signal transmission stability are remarkably improved, the problems that a traditional sensor is prone to leakage, signal distortion and connection looseness in extreme environments such as underwater explosion are effectively solved, and the sensor is suitable for complex application scenes such as wide temperature and high-frequency impact.

The present invention discloses a protective device for structures adjacent to underwater blasting, comprising a receiving structure, a first elastic member, a box assembly and a bubble curtain device, wherein the receiving structure is used to connect with a protected main body, and the receiving structure has a receiving portion arranged in a crisscross pattern, a plurality of first elastic members are arranged on the side of the receiving portion away from the protected main body, the box assembly is arranged in front of the receiving structure, and the box assembly abuts against the first elastic member, and the bubble curtain device is arranged on the side of the box assembly away from the receiving structure. During underwater blasting, the bubble curtain device can reduce the shock wave of the blasting, the box assembly can block the remaining shock wave and flying rocks, and the first elastic member and the receiving structure can buffer the vibration and increase the force-bearing area of ​​the protected main body, thereby reducing the impact on the protected main body and improving the protection effect.

The application belongs to the technical field of numerical simulation. The application provides a research method for near-wall cavitation of underwater explosion based on secondary development of LS-DYNA. The disclosed embodiment can reproduce the dynamic processes of explosion-induced local negative pressure area, cavitation nucleus formation and collapse in LS-DYNA, and can make up for the problems that the traditional model cannot accurately process cavitation truncation and negative pressure non-convergence; LS-DYNA is used for driving modeling, parameter input, cavitation model embedding, solution submission and result extraction, so that the simulation whole process automation is realized, the manual operation amount is greatly reduced, and the calculation efficiency and reliability are improved; the automatic batch processing of multiple working conditions is supported, the influence of factors such as explosion source distance, water depth, static water pressure, explosive equivalent and wall surface material on cavitation behavior can be systematically studied, and good expansibility is obtained; and the key data such as cavitation area pressure and wall surface structure response can be automatically extracted, so that scientific basis is provided for analyzing the wall surface strengthening impact caused by cavitation collapse.

The application provides an anti-explosion underwater soft robot, and belongs to the field of robots.The problem that high transient energy of underwater explosion easily causes damage to internal components and circuits is solved.The anti-explosion underwater soft robot comprises a flexible circuit layer, a plurality of circuit modules are arranged on the flexible circuit layer, and the circuit modules are flexibly connected; a non-Newtonian fluid buffer layer is wrapped outside the flexible circuit layer; an elastic buffer layer is wrapped outside the non-Newtonian fluid buffer layer; and a driving unit is connected with the elastic buffer layer and used for driving the robot to move.The anti-explosion underwater soft robot is mainly used for underwater safety detection and underwater resource exploration.

The utility model relates to an underwater anti-blasting-impact pier pile protection device, and belongs to the technical field of bridge structure protection.The pier pile protection device comprises a baffle and a plurality of supporting rods, a bearing platform and a pier pile are arranged in the baffle, the supporting rods are arranged between the baffle and the bearing platform, and the two ends of each supporting rod are connected to the bearing platform and the baffle correspondingly; the baffle is of a cylindrical structure and is formed by sequentially bonding a polyurea coating, a first layer of steel plate, an anti-impact tile, gradient foamed aluminum, a stainless steel honeycomb plate layer and a second layer of steel plate from outside to inside. According to the pier pile protection device with the underwater blasting impact resisting effect, when water flow is resisted, the circular structures of the baffles can reduce the stress concentration phenomenon, the borne force can be evenly transmitted to all positions of the inner bearing platform, meanwhile, the streamline cylinders can effectively reduce the resistance of the water flow and wind power, and the service life of the pier pile protection device is prolonged. A porous elastic structure is arranged in the baffle, so that the influence of blasting vibration on the pier can be reduced.

This application relates to the technical field of underwater blasting. Aiming at the loading of traditional underwater blast hole explosive cartridges, a construction method for underwater reef blasting in shallow water is proposed, including the following steps: S1: Blast hole drilling: Drill a number of blast holes on the surface of the underwater reef; S2: Casing installation: Insert a casing into each blast hole and make the top of the casing extend out of the water surface; S3: Hole cleaning construction: Clean the muck and accumulated water inside the casing; S4: Blast hole charging: Fill the explosive cartridges into the casing; S5: Connect the lead wire of the explosive cartridge to the detonator; S6: Explosion of the explosive: Detonate the explosive cartridges in each blast hole through the detonator. This application has the effect of facilitating the loading of underwater blast hole explosive cartridges.

The utility model relates to a fixing device for an underwater explosion impact resistance test of an electronic detonator, which comprises a fixing disc, a screw hole is arranged on the fixing disc, and a first bolt is arranged in the screw hole; at least one sliding groove is formed in the fixed disc; a second bolt is installed in any sliding groove, and the second bolt can slide along the sliding groove so as to change the distance between the second bolt and the first bolt. The second bolt is matched and fixed with the locking nut; a first through hole and a second through hole are respectively formed in the first bolt and the second bolt; the top of the primer detonator can be inserted into and abut against the first through hole, and a lead of the primer detonator can penetrate out of the upper end of the first through hole. The top of the to-be-tested detonator can be inserted into and abutted against the second through hole, and a lead of the to-be-tested detonator can penetrate out of the upper end of the second through hole; according to the utility model, the distance between the to-be-tested detonator and the primer detonator can be continuously adjusted, so that the distance setting is not limited by the hole site any more; and the height of the primer detonator can be adjusted, so that the blasting center of the primer detonator and key components of the to-be-tested detonator are positioned on the same horizontal plane, and test errors are avoided.

The invention discloses a surface tension coordinated regulation and control high-strength dense net underwater explosion jet flow suppression protection device and a use method. A selective permeable barrier is constructed through a high-strength dense net, surface tension of an interface is used for cooperatively and selectively permeating a water phase, blocking a gas phase from passing, breaking symmetrical expansion of bubbles and inducing energy to be dissipated in a capillary wave form, and the surface tension and multi-layer array configuration are adjusted by combining real-time adjustment of mesh tension and a dense net structure; the formation of high-speed jet flow is inhibited; and collapse energy is dispersed. The limitation that traditional protection only weakens shock waves is broken through, double inhibition of bubble pulsation and jet flow can be achieved, and the device has the advantages of light weight and modular deployment and has important popularization value in military and engineering scenes such as submarines and underwater facilities.

The invention discloses a multiphase fluid compressible and weak compressible mode mutual conversion numerical simulation method, and relates to the technical field of underwater explosion bubble full-time-history simulation, the method adopts a compressible Euler equation to carry out numerical simulation at the initial stage of underwater explosion, i.e., the initial stage of condensed phase charge detonation and bubble expansion; at the later stage of bubble expansion, converting a compressible Euler equation into a weak compressible hypothesis method for processing by judging whether the density change of a fluid grid unit exceeds a set threshold value or not; and in the bubble shrinkage stage, the compressible Euler equation is adopted again for numerical simulation, and underwater explosion bubble full-time-history numerical simulation is achieved. A volume fraction method is adopted in the equation solving process, the MUSCL reconstruction format and the HLLC numerical flux calculation format are coupled, and the prediction precision, stability and robustness of the overall numerical calculation method are improved.

The invention discloses an underwater blasting shock wave energy absorption device based on bubble energy release, belongs to the technical field of underwater blasting protection, and solves the problem that an existing gas curtain energy absorption device is insufficient in energy absorption effect due to the fact that turbulent vortex generated after bubble collapse is not utilized. According to the invention, the plurality of spherical bubble diffusers and the plurality of nozzles which are vertically distributed on the L-shaped base form a layered bubble regulation and control system, and the nozzles generate high-speed millimeter-level bubbles to disturb a micron-level bubble curtain wall of the spherical diffusers above; the speed difference of bubbles in a high-speed millimeter-level bubble and micron-level bubble curtain wall is utilized to cause instability of a shearing layer and generate multi-scale vortexes, local speed gradient and vortex interference are formed, the effect is that wake flow vortexes of the high-speed millimeter-level bubbles guide large-scale energy dissipation, meanwhile, the turbulence intensity in the bubble curtain wall is enhanced, and the energy consumption is reduced. And finally, kinetic energy is efficiently converted into heat energy through viscous dissipation, and the energy absorption rate is increased.

The present invention relates to a device and method for underwater explosion test of plate-like specimens, comprising a pedestal for fixing the plate-like specimens, wherein the pedestal is an internal hollow structure, the internal hollow part of the pedestal is used to simulate the air part of an underwater tunnel or a fortification structure, and the open end is not closed; a square opening is provided on a wall of the pedestal near the bottom of the pedestal, and the plate-like specimen is detachably mounted at the square opening through a fixing device; when the pedestal is fixed in an explosion test pool for testing, a displacement sensor and an acceleration sensor are mounted on the back explosion surface of the plate-like specimen located in the pedestal cavity through the open end of the pedestal; and a reflection pressure sensor is mounted on the front explosion surface of the plate-like specimen; the present invention meets the test requirements for underwater explosion of plate-like specimens and improves the accuracy of the test.

The invention belongs to the technical field of underwater engineering protection, and particularly relates to a portable underwater blasting shock wave suppression device with a buffer decompression function, which comprises a table body, an interception assembly, a multi-stage buffer assembly, a counterweight assembly and a control assembly, the intercepting assembly comprises a plate body, a lug plate and a supporting rod, and a counterweight assembly is arranged in the plate body; the multi-stage buffering assembly is connected with the flow guiding assembly and comprises a sleeve, a sliding rod, a piston and a spring. The control assembly comprises a controller, a pressure sensor and a terminal monitoring device, the pressure sensor is connected with the table body, and the controller is in wireless communication connection with the terminal monitoring device and the pressure sensor; according to the device, through the synergistic effect of all the assemblies, the pressure change of underwater blasting shock waves can be monitored in real time, and the working states of the intercepting assembly and the multi-stage buffering assembly are adjusted according to pressure change data, so that quick response and real-time self-adaptive adjustment on the shock waves are achieved; and the adaptability of the device to shock waves with different intensities and frequencies is improved.

The present invention discloses a method for predicting the dynamic response of a plate frame structure under underwater explosion load based on a convolutional neural network, which belongs to the technology of ship damage under underwater explosion load. The method first uses CEL to perform numerical simulation on the dynamic response of the plate frame structure under underwater explosion load to obtain data samples; generates different explosive equivalent-damage picture sets according to the damage caused to the plate frame by different equivalent explosives; performs dimensionality reduction processing on the aforementioned data samples according to the symmetrical structure of the plate frame; binds the reduced-dimensional data to the picture set; executes a convolutional neural network training program, uses the reduced-dimensional data and the picture set to train and obtain training results; executes a neural network training program, trains the input explosive equivalent-damage picture and the displacement data of each node of the plate frame, so that the explosive equivalent-plate frame damage-displacement of each node of the plate frame form a fitting relationship to achieve the purpose of prediction. The present invention uses a coupled Euler-Lagrangian method (CEL) to perform numerical simulation to obtain a database, trains the convolutional neural network based on the numerical calculation results, and realizes the rapid prediction of the dynamic response of the plate frame structure under underwater explosion load.

The invention discloses a submerged mold hoisting device for an underwater explosion experiment, and belongs to the technical field of ship and ocean engineering. Comprising a buoy located on the water surface, a fixed sliding rail, a submerged formwork hoisting device and an explosive hoisting device. The fixed sliding rail is connected with the buoy through a steel cable and located under the water surface. Two submerged mold hoisting devices and an explosive hoisting device are mounted below the fixed sliding rail in a sliding manner; the explosive hoisting device is positioned between the two submerged mold hoisting devices; a submerged formwork is connected between the two submerged formwork hoisting devices, and the lengths of the submerged formwork hoisting devices and the explosive hoisting devices and the positions of the submerged formwork hoisting devices and the explosive hoisting devices on the fixed sliding rails are determined according to the size of the submerged formwork, the equivalent weight of explosives and the positions of the explosives. According to the invention, the model can be moved horizontally and vertically, the relative position and included angle between the submerged model and the explosive can be effectively controlled, accurate positioning is realized, and the safety performance of the structure is also improved through the double-cylinder and double-rod design of the explosive hoisting device, so that the efficiency of the submerged model experiment is improved, and the development of related industries is promoted.

The present invention provides an array-type underwater explosive cutting device based on a multi-degree-of-freedom design. The array-type underwater explosive cutting device is a regular polygonal ring structure, comprising: a plurality of array-type cutting units connected in a ring, each array-type cutting unit being provided with a support structure at the connection with the adjacent array-type cutting unit; a cavity structure being provided on the inner side of the outer shell structure, the outer shell structure and the cavity structure forming the outer shell of a shaped charge structure; buffer structures being provided on both sides of the shaped charge structure, the buffer structures being connected to the inner wall of the outer shell structure; a rotating structure and a sliding structure being provided on the outer wall of the outer shell structure, the rotating structure being rotatably connected to the shaped charge structure. The present invention achieves efficient cutting of targets with uneven thickness or dispersed structure, and can also efficiently damage flexible structures such as submarine optical cables and electric cables, or submarine structural systems with multiple extension directions.

The embodiment of the invention discloses an underwater blasting monitoring method and device, electronic equipment and a computer readable medium. A specific implementation mode of the method comprises the steps that mobile drilling equipment is controlled to move into a water surface range corresponding to a target blasting position, and the mobile drilling equipment is controlled to conduct underwater drilling operation; controlling an image acquisition device to acquire an image of an acquisition range corresponding to the target blasting position to obtain a to-be-ranged image set; generating a target ranging information set according to the to-be-ranged image set and a target ranging model, and sending the target ranging information set to an early warning device; according to the target distance measurement information set, generating a safety early warning information set, and according to the safety early warning information set, sending early warning completion information to the monitoring terminal; and the blasting equipment is detected, a blasting equipment detection result is obtained, and the blasting equipment is controlled to execute blasting operation. According to the embodiment, the operation area of the underwater blasting project can be monitored, and the project safety is improved.

The invention provides a hull beam structure water explosion motion response test system and a test and analysis method thereof. The ship body beam structure water explosion motion response test system comprises a photographing device, a shutter control system of the photographing device has nanosecond-level time precision, and the number of photographed frames per second is not less than 10000; and the processing device is electrically connected with the photographing device, the processing device is used for adjusting photographing parameters of the photographing device, and the processing device has video interception, storage and format conversion functions so as to clearly and uninterruptedly record the whole movement process of the measured object. According to the test system provided by the invention, the motion data of the hull beam structure under the action of underwater explosion is measured in real time by establishing the hull beam structure underwater explosion dynamic response test device based on high-speed photography, and the dynamic response data of the hull beam structure is analyzed in combination with a proposed hull beam structure dynamic response data analysis method; the dynamic process of motion of the hull beam structure is restored more accurately, so that data support is provided for evaluating the damage state of the hull beam structure.

The embodiment of the application discloses a numerical calculation method for underwater explosion bubble movement and related equipment, a grid area is generated, simulation is performed in combination with multiple preset parameters, an area fraction is accurately determined to determine an interface position, geometric method is used to calculate a phase volume fraction flux and iterative simulation is performed, so that the maximum radius of the first pulsation of the bubble in the underwater explosion process and the first pulsation period are obtained, the whole process of the bubble movement can be finely simulated, and the maximum radius and the period of the first pulsation are accurately obtained.

The invention discloses an air filling underwater shock absorption mechanism and a construction method thereof, and relates to the technical field of underwater blasting shock absorption, the air filling underwater shock absorption mechanism comprises a barrel, an air filling device and a shock absorption device, the temporary sealing element is arranged on the outer surface of the drainage hole in a sealing manner; one end of the gas input mechanism is hermetically communicated with the top of the barrel, and the other end is communicated with the high-pressure gas pump through a gas pipe; the gas input mechanism is used for inputting air into the cylinder body, and when the air pressure in the cylinder body reaches the preset air pressure, the air in the cylinder body can jack the temporary sealing piece open and discharge water in the cylinder body; the one-way valve is arranged at one end of the gas input mechanism. After the high-pressure gas enters the cylinder, on one hand, the filler of the cylinder can be replaced by air from water, and on the other hand, the high-pressure air in the cylinder can be used as a natural sealing element, so that external water is prevented from flowing back into the cylinder from the drainage hole. Compared with the prior art, the interior of the cylinder is completely air, and the damping effect of the underwater damping hole is improved.

The invention discloses an intelligent prediction method for underwater blasting seismic velocity and dominant frequency based on deep learning, and relates to the technical field of machine learning, and the method comprises the steps: obtaining the multi-source data of a plurality of historical underwater blasting modes, verifying the multi-source factor feature vector contribution degree of local seismic velocity-dominant frequency of the plurality of underwater blasting modes, and obtaining the multi-source factor feature vector contribution degree of the local seismic velocity-dominant frequency of the plurality of underwater blasting modes; generating a peak shock velocity-dominant frequency spatial distribution diagram of each underwater blasting mode; according to the sensitive frequency range of the protection target type for the underwater blasting shock velocity-dominant frequency, evaluating the tolerable capacity vector of the protection target type of the to-be-blasted area; and an underwater blasting vibration velocity-dominant frequency prediction model is established, the multi-source data of the to-be-blasted area and the tolerable capacity vector of the protection target type of the to-be-blasted area serve as input, and an optimal underwater blasting mode meeting the protection target type of the to-be-blasted area is generated. The underwater blasting vibration velocity and the dominant frequency are accurately predicted, and the blasting mode decision-making benefit of the to-be-blasted area is maximized on the premise that safety is guaranteed.

The invention relates to the technical field of underwater blasting simulation experiments, and discloses an underwater blasting simulation platform, which comprises a hoisting structure, a blasting simulation structure, an intelligent data analysis system and the like, and is characterized in that the platform is used for simulating an underwater blasting process to acquire shock wave and pressure wave data caused by blasting in real time; the intelligent data analysis system comprises a data acquisition module, a data preprocessing module, an inversion analysis module and a result output module, an inversion model can be optimized through machine learning, the damage identification accuracy can be improved, the platform design is flexible, and the reliability is high. The lifting structure can adjust the position and height of the blasting simulation structure according to experiment requirements, it is ensured that different experiment scenes can be adapted, in addition, through the multi-source blasting simulation and real-time damage evaluation functions of the platform, accurate experiment data can be provided under complex environment conditions, and the efficiency and reliability of the underwater blasting experiment are greatly improved.

The invention discloses a preparation method of multi-fiber and rubber powder composite reinforced underwater anti-explosion concrete, and belongs to the technical field of building materials. The concrete is prepared from the following components in parts by weight: 15 to 25 parts of cement, 20 to 30 parts of mineral admixture, 50 to 65 parts of sand, 80 to 100 parts of stone, 15 to 20 parts of water, 0.8 to 1.5 parts of water reducing agent, 3 to 5 parts of steel fiber with specific specification, 0.1 to 0.3 part of polypropylene fiber with specific specification and 4 to 8 parts of rubber powder with specific specification. During preparation, firstly, the cement, the mineral admixture, the sand and the stones are subjected to dry mixing, then the water and the water reducing agent which are mixed in advance are added for wet mixing, then the steel fibers, the polypropylene fibers and the rubber powder are sequentially added for stirring, and finally, pouring, vibrating and standard curing are performed to obtain the concrete. Through multi-fiber composite toughening and rubber powder energy absorption characteristics, the concrete structure is optimized in combination with the large-mixing-amount mineral admixture, the anti-knock performance of the concrete in the underwater high-pressure environment is remarkably improved, and the concrete has the advantages of excellent mechanical properties, excellent durability, simple and convenient preparation process, environmental protection and controllable cost.

The invention discloses a precise positioning and depth control method for underwater drilling blasting, relates to the technical field of underwater blasting, and aims to effectively control blast hole positioning deviation through data real-time linkage calibration, collect water level data through double-source cooperation of an automatic moisture indicator and a water level pressure sensor, eliminate interference and ensure data precision. An intelligent ultra-deep value decision-making model based on machine learning is constructed, historical engineering data and current actual measurement parameters are combined, an optimal ultra-deep value is automatically output, and in the trial explosion optimization stage, an optimal parameter combination is formed by monitoring the vibration speed and observing the explosion effect and optimizing the explosion parameters; a layered charging structure and a hole-by-hole delay detonating network are adopted, the maximum single-section detonating explosive amount is hierarchically controlled according to the distance of a protected object, vibration and shock wave data are continuously monitored in the blasting process, and parameters are adjusted immediately when the data exceed the standard; and the data is fed back to the intelligent model to complete iterative optimization, so that more accurate parameter support is provided for subsequent blasting.

The application discloses an underwater explosion autonomous acquisition system for a concrete structure, which comprises a test pier body, a sensor group and a data acquisition device; a concrete base block is arranged at the middle part of the concrete structure; the sensor group comprises stress sensors, strain sensors, wall surface reflection pressure sensors and free field pressure sensors; and the data acquisition device is arranged in a sealed box which is embedded into the soil layer of the water bottom; the acquisition system is used for acquiring explosive explosion information, and is favorable for test personnel to acquire accurate test data and to make a blasting plan.

The invention discloses a PD-SPH simulation method and system for underwater explosion naval vessel damage assessment, and the method comprises the steps: dividing a naval vessel structure into plates, ribs, reinforced keels and other parts according to the naval vessel structure design, carrying out the in-plane particle discretization of each part, and then carrying out the translation in the thickness direction; all the components are spliced to obtain an integral structure, and under the condition that the particle distances in the thickness direction are kept consistent, the in-plane particle distances at the joints of the plates, the ribs and the reinforced keels are increased; endowing each component in the naval vessel structure with a material parameter; the method comprises the following steps: setting draft depth, endowing SPH particles with water surface height, and setting initial pressure distribution; setting the quantity of explosives, the position of a detonating point and detonating time according to actual working conditions; coupling modes among several materials are set; respectively calculating motion equations of the SPH explosive particles, the SPH water particles and the PD solid particles; and recording the damage condition of the naval vessel structure.