33 results about "Explosive force" patented technology

The utility model provides an atomizing core and an atomizer. The atomizing core comprises a porous base body and a heating piece. The porous substrate is provided with a first surface and a second surface which are opposite, and an air duct penetrating through the first surface and the second surface; the heating element comprises heating main bodies arranged on the first surface, and the heating main bodies are distributed in the radial direction of the first surface and the whole circumferential direction or local circumferential direction of the ventilation channel; the ring diameter of the first surface is R, the span of the heating body in the radial direction is W, and W / R is larger than or equal to 1 / 5 and smaller than or equal to 11 / 15. Through the arrangement, the coverage area of the heating main body on the atomization surface is improved, and the atomization effect is improved; meanwhile, according to the atomization core designed according to the proportion range, under the rated resistance, energy dispersion caused by an overlarge coverage area can be avoided, and it can be guaranteed that the smoke generation speed is high, so that the explosive force and the atomization amount are both improved, and the problems that in the prior art, an annular atomization core of an atomizer is poor in atomization effect, insufficient in explosive force and poor in atomization amount are solved.

The invention discloses an impact device, belongs to the technical field of engineering machinery, and aims to solve the problem that downward impact force and impact speed of an external impact component of the engineering machinery do not have explosive force. Comprising a cylinder body and a piston rod, a positive integer of cavities are formed in the cylinder body, a positive integer of piston blades are arranged on the piston rod, the peripheries of the positive integer of piston blades are in one-to-one corresponding sliding sealing fit with the inner circumferential walls of the positive integer of cavities, and the end walls of the two ends of each cavity are in sliding sealing fit with the piston rod. The piston blades divide the corresponding cavities into closed upper gas cavities and lower gas cavities, gas media are arranged in the upper gas cavities and the lower gas cavities, the upper ends of the piston rods extend out of the cylinder body and are connected with the lifting mechanism, the lifting mechanism circularly lifts and separates the piston rods, and the lower ends of the piston rods extend out of the cylinder body. When the piston rod is lifted by the lifting mechanism, the gas medium in the upper gas cavity is compressed, and energy is accumulated, so that the explosion effect of downward impact can be obtained when the piston rod is separated from the lifting mechanism.

The utility model discloses an energy-gathered water stemming bag for blasting hole plugging, which comprises a cylindrical polyethylene plastic thin bag with a fixing sleeve sewed on the outer side, and a high-flexibility and high-elasticity rubber energy-gathered ring capable of being sleeved in the plastic thin bag fixing sleeve, so that the resistance of a bag body and a hole wall is improved during installation, and the bag body is prevented from sliding down in a vertical shot hole; during blasting, explosive force pushes the blister mud bag outwards and extrudes the bag body, the rubber energy-gathering ring on the bag body also expands along with the blister mud bag and is tightly attached to the wall of a blast hole, and the movement resistance of the blister mud bag is remarkably increased, so that the action time of detonation gas and detonation stress waves is prolonged, and the blasting effect is effectively improved. When being used for blasting of a vertical blast hole of a mine roof, the anti-dust stemming bag is not prone to sliding out of the vertical blast hole, has the advantages of being low in cost, good in anti-dust effect, capable of preventing electric sparks, sanitary, safe, convenient to use, good in hole blocking effect and the like, can replace a traditional latex stemming bag, and has remarkable economic benefits and social benefits.

This invention discloses an integrated device and method for testing balance and explosive power, belonging to the field of sports physiology testing and sports equipment technology. The device includes a main body, a pedal fixed to the main body, a partitioned pressure sensor array disposed below the pedal, and a central processing unit. The pressure sensor array is physically divided into independent left-foot and right-foot sensing areas. The central processing unit is configured with two testing modes: in the explosive power testing mode, the vertical jump height of the test subject is calculated based on the free-fall formula by accurately capturing the time interval between the disappearance and reappearance of the pressure signal; in the balance testing mode, the test subject's balance ability is comprehensively evaluated by monitoring the signal triggering and persistence status of the two sensing areas and combining the stability analysis of the pressure signal during single-leg standing. This invention achieves a high degree of hardware and functional integration for two physical fitness tests, featuring accurate measurement, simplified process, and intelligent management.

The present application relates to a kind of automatic reset type elastic load trainer for explosive force training, including including rack, counterweight load unit and pulley transmission unit, the rack is portal frame structure, by left vertical column, right vertical column and the connecting beam fixedly connected to the top of two columns, the column body of left vertical column and right vertical column is evenly arranged with several positioning adjustment holes along vertical direction.The automatic reset type elastic load trainer for explosive force training, device is equipped with counterweight type pulling force training interface and height-adjustable push training interface simultaneously, can cover upper limb pulling force, upper limb thrust, lower limb drag, whole body coordinated explosion and multiple training projects, a device replaces multiple single-function training equipment, without switching equipment can complete whole body explosive force training, greatly improve training continuity and training efficiency, while saving space, reduce venue equipment procurement and maintenance cost.

In conventional air defense systems, missiles are mainly used, and in rock excavation for tunnel construction, dynamite is mainly used. These methods utilize the explosive force of gunpowder when destroying an object, but it is necessary to use a large amount of gunpowder, and a more efficient method has been required from the viewpoint of reducing the cost burden.SOLUTION: The same work effect as a conventional missile or dynamite can be obtained by a method using the penetration force (shock wave) of a current without using the explosive force of gunpowder which is the energy action of the missile or dynamite. The method of using a current as a substitute for gunpowder is a method of using a physical action of a positive charge and a load of electric energy (electrons) or light energy (light particles). Since the positive charge and the negative charge have the same characteristics as the N pole and the S pole of the magnet, the discharged current is induced using the light energy that is easy to control, so that the current is applied to an object to obtain an effect of replacing gunpowder. The problem is solved by this method.SELECTED DRAWING: None

The utility model relates to the technical field of radial magnet ring diameter detection, in particular to a radial magnet ring radial antiknock force detection device which comprises a base, a controller, a detection mechanism, a body and a limiting mechanism, the controller is arranged on the base and electrically connected with the detection mechanism, and the limiting mechanism is arranged on the base and electrically connected with the detection mechanism. The detection mechanism comprises a hydraulic assembly, a mounting plate and a detection head, one end of the hydraulic assembly is connected with the top of the base, the other end of the hydraulic assembly is connected with one end of the bottom of the mounting plate, and the detection head is detachably connected with the mounting plate through a bolt; the limiting mechanism comprises a limiting frame, a fixed frame, a sliding assembly, an electric push rod and a long plate, the fixed frame is arranged at the top of the base, the end portion of the limiting frame extends into the fixed frame, and the body is placed in the limiting frame. The problem that existing equipment cannot conveniently limit workpieces is solved.

The present invention relates a cable tray unit and a cable tray system. The cable tray unit comprises a bottom tray, a top tray and lock fastening assemblies, wherein the bottom tray has a bottom and two lower sidewalls extending from two opposite sides of the bottom toward a top; the top tray has the top and two upper sidewalls extending from two opposite sides of the top toward the bottom; the two lower sidewalls of the bottom tray and the two upper sidewalls of the top tray are arranged opposite each other, respectively; and the lock fastening assemblies fixedly connect the lower sidewalls and upper sidewalls opposite each other. While meeting the requirements for safe electric power operation, the cable tray unit also enables explosive force generated when a cable explodes to be limited within a tray.

This invention relates to the fields of explosion mechanics and computer simulation technology, and particularly to a method and apparatus for generating explosion shock wave field based on ray tracing. The method includes: constructing a three-dimensional geological and engineering scene model; generating an initial ray beam on the surface of the blast source according to the actual shape of the explosive charge; performing ray tracing calculations based on the model and the initial ray beam to simulate the propagation, reflection, and attenuation process of the shock wave in the medium, obtaining the actual cumulative propagation path and arrival time of each ray at its spatial location; combining the cumulative propagation path, arrival time, explosion parameters, and medium property parameters to construct a feature vector, inputting it into a deep neural network model for inference to obtain the explosion overpressure value at the current time step spatial location, and generating a pressure time history curve and cumulative impulse to obtain the explosion shock wave field. This method can solve the problems of computational energy efficiency bottlenecks and nonlinear dynamic response mapping distortion faced by existing technologies in assessing the damage of underground structures under complex mountain conditions.

A frame system for a door or a window capable of withstanding an explosive force is provided, the frame system includes a frame adapted to receive a pane therein, a beading adapted to be attached to the frame to secure the pane to the frame, such that the beading includes a retaining portion adapted to be attached to the frame and to retain the pane to the frame, and a reinforcing member extending from the retaining portion, such that the frame includes a hole adapted to receive the reinforcing member therein, such that the beading when attached to the frame, the reinforcing member is inserted into the hole to reinforce the retention of the pane to the frame.

The utility model discloses a window breaking device which comprises an outer pipe, a spring, a locking mechanism, a striking hammer and a striking head, the outer pipe is a hollow pipe, the spring, the locking mechanism, the striking hammer and the striking head are arranged in the hollow pipe, the spring is located at the tail end of the outer pipe, and the striking head is located at the tail end of the outer pipe. The locking mechanism is located on the outer pipe and arranged between the striking hammer and the striking head, the striking head is located at the outlet end of the outer pipe, when window breaking is not carried out, the locking mechanism locks the striking hammer to compress the spring in the outer pipe, and when window breaking is carried out, the locking mechanism locks the striking hammer to compress the spring in the outer pipe. The locking mechanism releases the striking hammer to enable the spring to impact the striking hammer so as to drive the striking hammer to impact the striking head, according to the technical scheme, the striking hammer enables the striking head to obtain huge explosive force and impact force through the striking hammer, and the problems that a traditional window breaking device is insufficient in destructive power and inconvenient to operate are solved.

The invention discloses an energy storage explosion venting device and method, and belongs to the technical field of explosion venting. According to the invention, the two electromagnets with the same magnetic poles opposite are arranged on the explosion venting plate and right below the explosion venting plate, the electromagnets are actively electrified when thermal runaway of the battery is detected, and the explosion venting plate is rapidly and accurately opened by utilizing the generated instantaneous repulsive force. A traditional passive mode of explosion venting depending on uncontrollable explosive force is overturned, active and accurate control over the explosion venting time and the explosion venting force is achieved, container disintegration and secondary hazards caused by out-of-control explosive force are fundamentally avoided, and the safety and reliability of an energy storage system are remarkably improved.

The utility model relates to the technical field of shoes, in particular to a basketball shoe capable of improving pedaling explosive force, which comprises a vamp body and a sole sewed and adhered below the vamp body, the vamp body is integrally provided with a wearing opening at the position of a foot heel, the sole comprises a midsole and an outsole arranged on the bottom surface of the midsole, and the outsole is provided with a plurality of holes. An anti-torsion plate is further fixedly arranged between the insole and the outsole, the anti-torsion plate comprises an anti-torsion plate body and a lower concave plate which is integrally formed on the anti-torsion plate body and located at the half sole position of the foot, the lower concave plate is treaded to be deformed to generate elastic force, and boosting is conducted through the elastic force of the lower concave plate.

The utility model relates to the technical field of metal hoses, and discloses a novel explosion-proof metal hose which comprises a hose body, the left end of the hose body is fixedly connected with a first connecting piece, the right end of the hose body is fixedly connected with a second connecting piece, and the surface of the first connecting piece and the surface of the second connecting piece are fixedly connected with flanges. The surface of the hose main body comprises an anti-explosion assembly, the anti-explosion assembly comprises a protective layer, the anti-explosion assembly is arranged, the surface of the hose main body is protected under the action of the multiple air bags, impact generated after the hose main body explodes can be intercepted to a certain degree, and therefore the explosion intensity is buffered, and the anti-explosion effect of the hose main body is improved. And meanwhile, under the action of the mounting layer, all the air bags can be conveniently mounted, and air in all the air bags is communicated under the action of the air cavities and the vent holes, so that all the air bags are conveniently deformed to protect the hose main body.

The invention relates to the field of rotary kiln systems, in particular to a rotary kiln system with a material cleaning device. The rotary kiln system with the material cleaning device comprises a rotary kiln barrel, a kiln lining, a support, a transmission, a seal, a flue gas cooling device, a dust collection device, a smoke exhaust device and the material cleaning device, and the material cleaning device comprises a launching assembly, an aiming assembly, a material cleaning head, launching explosives and a support; the material cleaning head is of a hollow structure defined by a shell, and explosives are filled in the material cleaning head. During material cleaning, the material cleaning head rapidly flies out of the launching channel under the action of explosive force of launched explosives or electromagnetic force or high-pressure gas thrust or mechanical elastic force to impact the formed ring in the rotary kiln aimed by the aiming assembly, and the formed ring or the thick kiln skin collapses; moreover, the device is used for removing the formed ring when the rotary kiln works normally, compared with a traditional formed ring removing method, the kiln does not need to be stopped, production is not affected, the production efficiency of the rotary kiln is guaranteed, and the material cleaning time and cost are saved.

This invention provides a directional seismic source excitation device and a seismic data acquisition method, comprising: a top cover, installed on the upper end of the device, to restrict the upward transmission of energy from an explosive seismic source or other seismic source capable of generating explosive force; a middle tube, located in the middle of the device, containing the seismic source; a bottom plate, also located in the middle of the device, containing the explosive seismic source or other seismic source capable of generating explosive force, with grooves created to form weak points, guiding the energy of the explosive seismic source or other seismic source capable of generating explosive force to penetrate the bottom plate along the inner circle of the grooves; a guide tube, restricting the circumferential transmission of the energy after blasting and the mass block of the breached bottom plate; a cap, located at the bottom of the device, to prevent mud and sand from entering the guide tube during the process of lowering the device into a well; and fastening bolts for securing the top cover and the middle tube. By using the explosive force generated in the seismic source cavity to impact the weak points of the bottom plate of the seismic source device, the bottom plate detaches from the device at the weak points, achieving the purpose of directional seismic source excitation.

The invention provides a dual-mode unmanned aerial vehicle countering device, and relates to the field of structural mechanics and explosive mechanics, the dual-mode unmanned aerial vehicle countering device comprises a bottom shell, a connecting piece is installed in the bottom shell, an explosion propagation network plate is installed in the bottom shell, a panel is installed in the explosion propagation network plate, a first prefabricated groove is formed in the surface of the panel, and a second prefabricated groove is formed in the surface of the panel; a second prefabricated groove is formed in the surface of the panel, first charging grooves are formed in the circumference of the bottom of the inner wall of the explosion propagation network plate at equal intervals, second charging grooves are formed in the circumference of the bottom of the inner wall of the explosion propagation network plate at equal intervals, and a flying net is arranged at the bottom of the explosion propagation network plate. According to the unmanned aerial vehicle capturing device, by exciting charge in the first charge groove and the second charge groove, the panel forms high-speed fragments according to the first prefabricated groove and the second prefabricated groove to strike the unmanned aerial vehicle, when detonation signals are transmitted to the mass blocks on the outer circumference of the detonation propagation network plate, the mass blocks pull the flying net to fly out, and the unmanned aerial vehicle is captured; therefore, the device achieves double countering effects of striking and capturing.

The present invention relates to an explosion mechanics simulation test system, and in particular to a surface shock wave environment chemical explosion simulation test system and method. The system solves the technical problems that the existing explosion mechanics simulation test system is not suitable for long-distance large-equivalent explosions, and has poor designability, high requirements, large workload, and low efficiency. The test system of the present invention includes an assessment platform, a load simulation unit, and an initiation test unit; the assessment platform includes a foundation, an assessment structure, and a sensor; the load simulation unit includes a square frame structure, a pressure relief plate, a plurality of plug bolts, an explosion source, and a homogenizing material; the square frame structure, the pressure relief plate, and the foundation form a loading cavity; a plurality of air-release threaded holes are provided on the pressure relief plate; the plug bolts are inserted into the air-release threaded holes; the initiation test unit includes a pressure sensor, a detonating wire, an initiator, and a data acquisition device; the explosion source is electrically connected to the initiator through the detonating wire; the initiator, the pressure sensor, and the sensor of the assessment structure are electrically connected to the data acquisition device respectively.

The utility model relates to the field of fitness equipment, and discloses an explosive power training apparatus, which comprises a base, a movement mechanism and an adjusting mechanism, the movement mechanism is arranged at the upper end of the base, the movement mechanism comprises two support columns, the adjusting mechanism is arranged in the base, the adjusting mechanism comprises two storage wheels, and the two storage wheels are arranged on the base. A sliding groove is formed in the rear end of the middle of the upper end of the base, guide rods are fixedly connected to the middles of the inner walls of the front end and the rear end of the sliding groove, supporting sliding blocks are slidably connected to the outer walls of rod bodies of the guide rods, transverse rods are fixedly connected to the lower ends of the two sides of each supporting sliding block, and first elastic belts are fixedly connected to the outer walls of the front ends of the transverse rods. According to the lower limb and upper limb training device, a supporting sliding block is tensioned through a first elastic belt in the movement mechanism, a stretching rod is tensioned through cooperation with a second elastic belt to achieve lower limb and upper limb training, the tightness of the first elastic belt and the tightness of the second elastic belt are changed by shaking a first crank and a second crank in the adjusting mechanism, and the training intensity is changed.

The present invention relates to: a smart fire-extinguishing device for automatically performing a fire-extinguishing operation by detecting the outbreak of a fire; and a smart fire-extinguishing system including same, and provides a smart fire-extinguishing device comprising: a chemical storage part in which fire-extinguishing chemicals are filled; a fuse part for exhibiting explosive force so that the fire-extinguishing chemicals of the chemical storage part are jetted to the outside; and a fire detection part, which detects at least one from among temperature, flames and smoke, compares a detection result with a pre-set fire outbreak reference value so as to determine whether a fire breaks out, and operates the fuse part according to a determination result so as to jet out the fire-extinguishing chemicals.

The invention relates to a visual sympathetic detonation simulation method based on an unreal engine, belongs to the technical field of sympathetic detonation simulation, and solves the problems of high cost, low efficiency and non-visual result of a sympathetic detonation simulation method in the prior art. Comprising the following steps: based on a to-be-simulated sympathetic detonation scene, constructing a three-dimensional basic model of a main dispensed explosive and a dispensed explosive; wherein the to-be-simulated sympathetic detonation scene comprises information of main dispensed powder and dispensed powder and an elastic shaft distance between the main dispensed powder and the dispensed powder; on the basis of the sympathetic detonation scene to be simulated and the three-dimensional basic models of the main dispensed powder and the dispensed powder, virtual main dispensed powder and virtual dispensed powder are rendered in an unreal engine; and constructing and loading an explosive power field model and a to-be-delivered explosive detonation criterion, and performing virtual main explosive delivery and virtual to-be-delivered explosive sympathetic detonation simulation in the unreal engine to complete sympathetic detonation visual simulation.

The invention provides a method and a system for determining an explosion load of an axial air interval charging hole wall, and belongs to the technical field of numerical simulation of explosive mechanics and geotechnical engineering. According to the method, theoretical analysis and derivation are carried out on the explosion process of the charging section, a calculation method for the load peak values of the charging section and the air section is established, and the load peak values serve as key parameters to be reasonably given to a load duration curve of each node of a blast hole wall. According to the method, the obvious difference between the charging section and the air section is fully considered, and the load applying modes under different charging structure conditions are distinguished, so that the constructed blast hole wall load curve better conforms to the actual explosion process in the aspects of peak value characteristics, action time history and spatial distribution. The method is clear in calculation process, clear in physical significance, suitable for various axial charging structural forms, capable of effectively improving the accuracy of drilling and blasting numerical simulation and engineering analysis results and good in engineering application value.

To provide a hollow structure equipped with a protective structure that can mitigate the explosive impact force of a projectile on the hollow structure at a relatively low cost. [Solution] The protective structure 3 comprises an inner concrete layer 22, which is an inner hard material, provided on the side of the hollow structure body 2; an outer concrete layer 21, which is an outer hard material, provided on the outside of the inner concrete layer 22 at a distance in the thickness direction; and a foam layer 23, which is a buffer material with lower strength than the inner concrete layer 22 and the outer concrete layer 21, provided between the inner concrete layer 22 and the outer concrete layer 21. When an incoming projectile collides with the outer concrete layer 21 and explodes between the inner concrete layer 22 and the outer concrete layer 21, this explosive force is transmitted to both sides in the width direction on the outside of the protective structure 3 by damaging the weaker foam layer 23, and the explosive impact force is released to the end side of the foam layer 23, thereby protecting the hollow structure body 2 from explosion.

The invention discloses a method for rapidly applying a motion charge explosion load on a structure, and belongs to the technical field of explosion mechanics, and the method comprises the following steps: obtaining finite element models of motion charge incident explosion and reflection explosion, and obtaining overpressure time-history curves of incident shock waves and reflection shock waves at different positions in a space; spatial distribution of incidence peak overpressure, specific impulse and overpressure reflection coefficient of incident shock waves of the motion charge explosion is obtained through the overpressure time-history curve; and a calculation formula of incident peak overpressure, specific impulse and overpressure reflection coefficient of incident shock waves of the motion charge explosion is introduced through spatial distribution. By accurately capturing shock wave space distribution and introducing a quantification formula, the situation that local pressure is amplified due to reflection superposition of load deviation is avoided; the fitting coefficient optimizes the dynamic prediction, refines the duration to match the structural response, resulting in a subprogram generating a unit level curve, which can quickly apply a motion charge blast load to the structure.

The invention belongs to the technical field of explosion mechanics, and particularly discloses an efficient prediction and calculation method and system for detonation performance parameters of thermobaric explosives. Comprising the following steps: constructing an aluminum-containing explosive basic parameter system, and assuming the percentage of aluminum powder participating in a secondary reaction; performing preliminary prediction on detonation pressure, detonation temperature and detonation velocity of the aluminum-containing explosive to form a reference input parameter set of an explosive detonation reaction stage; constructing a thermodynamic equilibrium model, calculating the chemical component distribution of a secondary reaction product, and calculating the pressure of a gaseous product in combination with an improved BKW state equation; and establishing a dual convergence criterion and a nested iteration mechanism, dynamically feeding back and adjusting the reactivity of the aluminum powder participating in the secondary reaction in the iteration process until the dual criterion simultaneously meets the precision requirement, outputting the detonation pressure, the detonation temperature, the detonation velocity and the detonation heat in the CJ equilibrium state and balancing the amount of substance of each component, and solving to obtain the parameters required by the JWL state equation suitable for the aluminum-containing explosive. According to the invention, rapid convergence and high-precision matching of detonation parameter calculation are realized.

The invention relates to an aerial fog bomb and an atomization device.The aerial fog bomb comprises a liquid storage element, an atomization core and a gas-liquid exchange element communicating the liquid storage element with the atomization core, and the atomization core comprises an atomization core liquid guide element and a mesh heating element; the gas-liquid exchange element comprises a gas-liquid exchange element sleeve, a gas-liquid exchange element core body inserted into the gas-liquid exchange element sleeve and a gas-liquid exchange element through hole axially penetrating through the gas-liquid exchange element, and the mesh heating element is a latticed heating element formed by punching a sheet resistance material. The atomization device comprises the aerial fog bomb. According to the aerosol bomb and the atomization device, the resistance value of the atomization core is stable, liquid atomization can be uniformly controlled, the leakage prevention performance is good, the explosive power is high, and liquid in the liquid storage element can be released as much as possible.

The invention discloses a high-energy explosive post-explosion combustion energy release dynamics numerical simulation method, and belongs to the field of explosive mechanics and computational fluid mechanics. The method solves the problem that a traditional method is difficult to accurately simulate post-combustion energy release and flow field coupling. According to the scheme, the method comprises the following steps: constructing a two-dimensional reaction flow Navier-Stokes control equation; in closed-loop iteration, adaptively determining a time step length, a fifth-order WENO format discrete space item, a primitive reaction model calculation chemical source item and a third-order Runge-Kutta discrete time item; the JASMIN framework is used for realizing parallel computing; and outputting the space-time energy data. The state equation is closed by a JWL equation (detonation product) and a Stiff-gas equation (air). The method is used for simulating energy release characteristics of high-energy explosives and evaluating damage of supporting weapons.

The utility model discloses an explosion-proof reinforced concrete anti-crack wall, which comprises a reinforced concrete wall body and an explosion-proof plate, a reinforcement frame is built in the reinforced concrete wall body, extension reinforcements are welded on the reinforcement frame in a matrix distribution mode, one end of each extension reinforcement is exposed out of the front side wall of the reinforced concrete wall body, and the other end of each extension reinforcement is exposed out of the rear side wall of the reinforced concrete wall body. The explosion-proof plates are attached to the front side wall of the reinforced concrete wall body in a plurality of transverse rows, the adjacent transverse rows of explosion-proof plates are distributed in a staggered mode, each explosion-proof plate comprises a square frame, a honeycomb-shaped rubber layer, an asbestosed wire gauze layer and a reinforced concrete blocking layer, and the gaps, between the explosion-proof plates, of the front side wall of the reinforced concrete wall body are filled with concrete in a level-up mode. And the front side surface of the explosion-proof plate is flattened. According to the explosion-proof plate, the asbestosed wire gauze layer is fireproof, the honeycomb-shaped rubber layer can bear large explosive force, the explosion-proof plate has high explosion-proof capacity, and the explosion-proof plate is installed on the outer side wall of the wall body, so that the explosion-proof plate plays an important role in protecting the wall body.

The utility model provides a security protection appliance for explosive force training relates to the field of protection appliance. The utility model discloses a protection bottom plate, the upper surface fixedly connected with the protection air bag of protection bottom plate, the outer surface fixedly communicated with the inflation pipe of protection air bag, the outer surface of protection air bag is equipped with the exhaust valve, the bottom surface of protection bottom plate is provided with two interval control mechanisms. The utility model discloses the cooperation design of protection bottom plate, protection air bag, inflation pipe and exhaust valve, can when people do push -ups training, through the inflation pump of protection air bag, make protection air bag rise, can prevent the face or body after doing push -ups for a long time and hit the ground, cause the harm to the face or body, increase the security when training, and through the setting of interval control mechanism can control the distance between two pressing plates, and conveniently adapt to different people and train.

The application discloses a kind of prediction methods of the degree of fragmentation of concrete structure under explosive load, belong to the field of explosion mechanics and impact dynamics.The application analyzes the propagation process of explosion energy by detonation theory;Based on the deformation potential theory, the deformation energy of the concrete structure under the action of explosive load is calculated;Combined with Griffith fracture theory, the energy dissipation in the fragmentation process of concrete structure is calculated;Using kinematics theory and kinetic energy theorem, the initial kinetic energy of secondary fragments of concrete structure under explosive load is determined;Then, based on the principle of energy conservation, the degree of fragmentation of concrete structure under explosive load is determined;The energy dissipation and the parameter information of secondary fragments of concrete structure at different periods in the explosion process are effectively predicted.The application is suitable for military defense and blasting fields, and the parameter information is used to optimize the concrete structure, improve the explosion defense effect or the blasting effect on the concrete structure.