18 results about "Explosive force" patented technology

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

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 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 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 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.

A breaching device includes a body having a tamping material. The body has a target surface that is configured to face a target to be breached and a backing surface that is opposite the target surface. The tamping material is formed of gel and is configured to reflect an explosive force directed way from the target surface towards the target surface.

The invention discloses a human body lower limb explosive power evaluation device, and relates to the technical field of physique testing, the human body lower limb explosive power evaluation device comprises a testing frame and a first assembly mounted on the testing frame, the first assembly comprises guide columns fixedly connected to four corners of the testing frame and used for limiting movement of a plurality of parts, and a baffle plate is slidably connected in the testing frame; through the arrangement of the first assembly and the second assembly, under the cooperation of parts such as a pedal plate, a guide column and a clamping block, the device adapts to the natural force exerting posture of a tester, compared with a traditional sitting posture or bending type testing device, the device is closer to the lower limb force exerting characteristics of actual motion scenes such as running and jumping, and measurement errors caused by uncomfortable postures are effectively avoided; meanwhile, the guide column and the clamping block are cooperatively matched, so that the assembly can be guided to move vertically, transverse force loss is reduced, it is ensured that pedaling and stretching force is accurately transmitted to a follow-up assembly, and torque, rotating speed and jumping height data better fit the real lower limb explosive force level of a tester.