43 results about "Impact stress" patented technology

The invention provides a time domain and frequency domain combined impact resistance analysis method and device for a ship stern tube, and the method comprises the steps: building geometric models of all parts in the stern tube through three-dimensional modeling software according to an actual engineering drawing of the stern tube, carrying out virtual assembly on the geometric model of each component according to the actual assembly relation of each component to obtain a geometric model of the tail shaft tube; importing the geometric model of the tail shaft tube into finite element software, endowing each component with material attributes, and carrying out grid division on the geometric model by adopting an overall network size control method; and performing static analysis on the geometric model after grid division to obtain static working stress, performing dynamic analysis on the geometric model after grid division to obtain dynamic impact stress, and synthesizing the static working stress and the dynamic impact stress into total stress. According to the method, time domain and frequency domain combined shock resistance response calculation is carried out for the tail shaft tube as a core component of the ship propulsion system, and the accuracy of shock resistance response calculation is improved.

The invention relates to a material dynamic mechanical property testing technology, in particular to an impact mechanical loading device and method based on a locked-rotor test of an electromagnetic coil emitter, and the device comprises a pulse power supply module, an electromagnetic loading module, a constraint fixing module and a measurement and control system. Capacitor charging voltage is set through an upper computer, a control switch is switched on to discharge an electromagnetic loading module to generate pulse current, and an electromagnetic coil generates a pulse magnetic field to enable a conductor armature to induce eddy current to generate axial electromagnetic force; the position of the armature is rigidly restrained to form locked rotor, impact electromagnetic force is directly loaded to a sample through an impact head to form impact stress, and dynamic response, fatigue damage and aging accumulation experiments of materials are carried out by monitoring the working performance of a monitoring device such as voltage, current and impact force. The device has the advantages of being small in size, flexible and adjustable in impact stress wavelength and amplitude, high in efficiency and the like, and the problems that a traditional mechanical impact device is large in size, the impact stress pulse width is not easy to regulate and control, and the test efficiency is low are solved.

The utility model relates to the technical field of composite boards, and discloses a lightweight composite board for railway vehicles, which comprises a board component, a buffer component and a mounting component, the buffer component and the mounting component are mounted on the board component, and a fastening component is mounted between the buffer component and the mounting component. The buffer plate in the composite plate is fixedly mounted on the reinforcing layer through the first fixing screws, impact stress is conducted to the buffer plate through the fixing plate sleeve when the composite plate is collided by an external object, and an effective buffer effect is achieved through the buffer groove formed in the buffer plate; reinforcing ribs fixedly installed between the buffering plate and the reinforcing layer can reduce the weight and guarantee the strength of the buffering plate and the reinforcing layer, and before the composite plate is installed, a second fixing screw can be rotated to enable a fixing nut to move in the direction close to the second fixing screw under the action of thread meshing; and then the pressing plate is extruded, so that all parts in the plate assembly and the buffer plate are tightly attached to each other, and the problem that the plate falls off due to the fact that the adhesion layer loses efficacy after long-time use is solved.

A hoisting plate is fixedly connected with a boss through a net plate to form a hoisting frame, the two hoisting frames are fixedly connected together through two bridge frames to form the damping frame, the hoisting plate, the bridge frames, a supporting table, the boss and the net plate are all made of Q355B steel, the thickness of the supporting table is 20 mm, the thickness of the supporting table is 20 mm, and the thickness of the boss is 20 mm. The thickness of the hoisting plate is 8mm, the thickness of the net plate is 6mm, and the thicknesses of the bridge frame and other plates are 5mm; the net plate and the hoisting plate are provided with cross-shaped reinforcing ribs with the width of 5 mm and the height of 8 mm, and triangular reinforcing ribs with the thickness of 5 mm are arranged on the rack main body; lightening holes are formed in a web plate of the screen plate; the boss is matched with the supporting table in a convex-concave structure, and the polyurethane pouring layer is filled in a convex-concave gap between the boss and the supporting table to form an anti-falling structure. The vibration isolator can effectively reduce impact stress, and has the characteristics of good vibration isolation effect, irradiation resistance, corrosion resistance, light weight, high strength and the like.

The present invention provides a steel box girder hoisting device for construction, which relates to the technical field of construction. A hoisting device is placed at the tail of a main hook and an auxiliary hook. During hoisting, under the action of the gravity of the hoisted steel box girder, the hoisting device moves from the tail of the main hook and the auxiliary hook to the middle, driving the auxiliary hook to rotate relative to the main hook, so that the middle of the auxiliary hook gradually approaches the middle of the main hook, that is, the auxiliary hook gradually changes from a state separated from the main hook to a state merged with the main hook. During the rotation process, the auxiliary hook is restricted by a damping mechanism, which slows down the speed of the hoisting device moving from the tail of the main hook and the auxiliary hook to the middle, playing a shock-absorbing role. That is, at the moment of hoisting and loading, when the hoisting device is subjected to an instantaneous impact force, the damping mechanism absorbs the impact stress generated between the auxiliary hook and the hoisting device; when the hoisting device moves from the tail of the main hook and the auxiliary hook to the middle, the auxiliary hook provides lateral support and position limiting for the hoisting device, reducing the unstable shaking of the hoisting device and reducing the impact on the stability of the steel box girder hoisting and construction safety.

The present invention provides a method and system for monitoring stress in a guide beam during jacking construction, relating to the technical field of stress monitoring. The method comprises: determining stress data and construction environment data at multiple moments during a monitoring cycle using a combination of sensors disposed at preset locations in the construction environment and at preset stress monitoring locations; processing the construction environment data according to a trained stress detection error prediction model to obtain a stress detection error; determining actual stress data based on the stress detection error and the stress data; obtaining construction material information; determining an allowable stress value based on the construction material information; determining real-time stress monitoring results based on the allowable stress value and actual stress data; determining dynamic impact stress monitoring results based on the actual stress data; and generating a monitoring report based on the real-time stress monitoring results and the dynamic impact stress monitoring results. According to the present invention, the accuracy and comprehensiveness of stress monitoring in guide beams during jacking construction can be improved.

This invention discloses a tensile stress detection device and method, belonging to the field of stress detection technology. The stress detection device of this invention includes a first connecting member, a second connecting member, a first mounting member, a second mounting member, an adjusting and fixing member, a locking member, and a stress detection component. The first connecting member connects to a first stress member, the second connecting member connects to a second stress member, and the stress detection component is disposed between the first and second mounting members. The first connecting member and the second mounting member, and the second connecting member and the first mounting member, are fixedly connected by the adjusting and fixing member and the locking member. This invention can detect extremely large tensile force changes between two stress members, thus enabling real-time detection of stress increase trends, precise control of equipment operating parameters, effective control of impact stress loads, and ensuring safe and stable equipment operation.

The utility model belongs to the technical field of pipeline elbows, and particularly relates to a high-pressure movable elbow with a high buffering function, which comprises an elbow pipe, an end cover, a movable plug, a sliding rod and a buffering spring, a buffering pipe is integrally arranged on the outer side of the bending part of the elbow pipe, the movable plug is arranged in the buffering pipe in a sliding manner, and the sliding rod on the movable plug is inserted on the end cover in a sliding manner. The end cover is in threaded connection with the buffer tube, and a buffer spring is arranged on the sliding rod between the end cover and the movable plug. According to the utility model, the buffer pipe is arranged at the bending position of the bent pipe, and the buffer pipe and the movable plug in the buffer pipe are used for effectively buffering pipeline impact caused by a water hammer phenomenon, so that the influence of impact stress on the bent pipe is reduced, the service life of the bent pipe is prolonged, and the stable use of the bent pipe is ensured; and meanwhile, by adjusting the compression amount of the buffer spring, the buffer sensitivity of the impact stress in the elbow can be debugged, so that different use requirements can be met, the application range is expanded, and the use convenience is improved.

The application discloses a high-temperature alloy fastener mold management method and system, a computing device and a medium. Based on the process of machining high-temperature alloy fasteners by a cold header mold, multi-dimensional working condition data of the cold header mold are synchronously collected. The multi-dimensional working condition data include acoustic emission signals, impact stress signals, temperature signals and machining timing data. The multi-dimensional working condition data are input into a wear prediction model to output a predicted wear degree of the cold header mold. The wear prediction model is built based on a machine learning algorithm. According to the predicted wear degree of the cold header mold, corresponding control strategies are executed for the process of machining high-temperature alloy fasteners by the cold header mold. In this way, by inputting the multi-dimensional working condition data into the wear prediction model to predict the wear degree of the mold and by real-time control of the mold operation based on the prediction result, the wear state of the mold can be accurately identified and graded, and the service life of the mold and the machining precision of the high-temperature alloy fasteners are improved.

This utility model discloses a wear-resistant reinforcing layer structure for rubber products, comprising a rubber base layer, an elastic buffer intermediate layer and a wear-resistant top layer sequentially disposed above the rubber base layer. The Shore hardness of the elastic buffer intermediate layer is lower than that of the wear-resistant top layer but higher than that of the rubber base layer. This utility model achieves initial wear resistance through the wear-resistant layer, while simultaneously providing a sacrificial lubrication layer and hemispherical wear-resistant protrusions on the wear-resistant layer to form a dual-level protection. The sacrificial layer initially consumes wear resistance, while the wear-resistant protrusions provide chip storage space in the later stages, extending the service life of the wear-resistant layer. The elastic buffer intermediate layer ensures that the impact stress received by the wear-resistant layer is buffered and does not directly affect the rubber base layer. Furthermore, the two transition sub-layers, with their varying hardness, reduce interfacial shear stress.

The utility model discloses a cutter buffer structure for paperboard corner cutting of a printing machine, and relates to the technical field of printing. The cutter buffer structure for paperboard corner cutting of the printing machine comprises a cutter shaft and a cutter assembly, and a buffer mechanism is arranged on the outer wall of the cutter shaft; the buffer mechanism comprises a bowl cutter and a sliding bottom cutter holder; the bowl cutter has the technical effects that the spring, the guide sliding shaft and other components are arranged, when the angle cutter is in contact with the bowl cutter, the spring can absorb impact force and compress the impact force, the impact force is converted into elastic potential energy, the displacement speed of the guide sliding shaft is effectively reduced, and the bowl cutter is prevented from falling off. Hard collision between the angle cutter and the bowl cutter is avoided, and therefore effective buffering of impact force is achieved. Due to the buffering effect of the spring, impact stress borne by the corner cutter, the bowl cutter and related connecting parts is effectively dispersed and relieved, and abrasion of parts caused by impact is reduced.

The invention relates to the technical field of impact effect prediction and improvement, and discloses an impact effect prediction and improvement method and system based on the blast hole blockage length, and the method comprises the steps: analyzing the stress distribution condition in a blast hole according to the pre-obtained detection data of blockages in the blast hole, and obtaining a blast hole blockage analysis result; combining the blast hole blockage analysis result and preset impact parameters to construct an impact effect analysis model, and predicting the dynamic distribution condition of energy in the blast hole to obtain an energy distribution result; on the basis of an energy distribution result, taking each blast hole as a node and taking a position relation between the blast holes as an edge, and constructing a blasting area action diagram; simulating the propagation process of impact stress waves and cracks, and analyzing the node state after impact to obtain a first impact effect; analyzing the improvement direction through a preset impact improvement model, and generating an improvement scheme; according to the invention, the precision and accuracy of blast hole blocking parameter measurement can be improved, the authenticity and comprehensiveness of the whole breaking effect simulation process of the blasting area are enhanced, and the impact effect is improved.

The utility model provides a wear-resistant multipurpose milling tooth, and belongs to the technical field of milling teeth. Comprising a tool nose with the top of a short conical structure, a tool apron which is integrally formed and of a circular-truncated-cone-shaped structure is arranged at the bottom of the tool nose, and a welding protrusion is arranged at the bottom of the tool apron; the cutter body is of a circular truncated cone structure, and a groove matched with the bottom of the cutter holder is formed in the top of the cutter body; the cutter bar is sleeved with a matched clamping spring, and the outer side of the clamping spring is sleeved with a matched check ring. Welding air holes can be effectively reduced and impact stress can be dispersed through the welding protrusions, bending strength is improved through the design of the tool apron of the circular truncated cone structure, the tool nose of the short cone structure and the thickened short head, the alloy crushing rate is reduced, the milling cutter is more suitable for milling under severe working conditions, the tool nose is effectively prevented from being crushed and fractured, and the service life of the milling cutter is prolonged. The cutter head which is made of the tungsten carbide alloy and coated with the polycrystalline diamond coating on the surface has both impact resistance and wear resistance, so that the service life is prolonged.

The application provides a superhigh-pressure acidizing fracturing pump fluid end assembly and a manufacturing method thereof, which comprises a valve seat base body, a valve body configured to be engaged and disengaged in the inner cavity of the valve seat base body through reciprocating movement, and a sealing rubber ring clamped on the valve body, the application opens an annular groove with a half-dove-tail inclined side wall and a sinusoidal wave-shaped groove bottom on a non-carburized hardening tough steel base body conical sealing surface, constructs a ceramic reinforced layer containing nanoscale and microscale carbides in the groove by in-situ self-reaction, the inclined configuration of the half-dove-tail side wall forms self-clamping locking by the thermal shrinkage effect of the cladding layer during cooling, converts the interface residual tensile stress into extrusion prestress, and the sinusoidal wave-shaped groove bottom disperses the axial high-frequency impact stress into shear stresses which offset each other, so that the macro fatigue collapse and micro coating cracking failure are solved, and the valve seat sealing surface has high erosion resistance, high fatigue resistance and high reliability.

The application discloses a kind of water turbine blade fatigue damage numerical simulation and life prediction method and related device, comprising: obtaining the three-dimensional geometric model of water turbine blade and operating condition parameter;According to the three-dimensional geometric model of the water turbine blade and operating condition parameter, fluid-structure interaction model is established, and the fluid pressure fluctuation, cavitation impact stress and sand particle erosion load distribution on the surface of blade in the operation process are extracted;According to the fluid pressure fluctuation, cavitation impact stress and sand particle erosion load distribution on the surface of blade, the equivalent stress of blade is formed;Based on the equivalent stress and cycle number, fatigue damage evolution model is constructed;According to the fatigue damage evolution model and cumulative damage theory, the fatigue damage amount of blade under different operating time is calculated, and the life prediction result is output, and the method and related device can dynamically predict the fatigue life of water turbine blade.

The invention relates to the technical field of body armor, and discloses an outer protective layer. The auxetic structural layer comprises an upper functional layer, a middle functional layer and a lower functional layer from outside to inside, a plurality of polygonal concave buffer grooves distributed at equal intervals are formed in the auxetic structural layer, and the buffer grooves of the auxetic structural layer are filled with shear thickening liquid; when the body armor is impacted by external force, the groove wall fiber network of the multilateral concave buffer groove buffers the external impact force through stretching deformation, the shear thickening liquid is thickened, and the fiber network around the damage bearing part of the body armor is locked to form a local rigid supporting area; the inner protective layer and the auxetic structure layer are located between the outer protective layer and the inner protective layer, the beneficial effects of being excellent in synergistic protective performance, uniform in impact energy dispersion and capable of assisting nursing are achieved, and the problems that a traditional body armor is limited in energy absorption efficiency, blunt injuries are easily caused by impact stress concentration, and the service life is long are solved. The auxiliary nursing function of the injured part is lacked, and primary treatment cannot be carried out on the wound in time.

1. The name of the design product: low temperature insulation tank sealing film. 2. The use of the design product: used for laying on the inner surface of low temperature insulation tank, resisting low temperature stress and liquid impact stress. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The application relates to the technical field of impact effect prediction improvement, and discloses an impact effect prediction improvement method and system based on a blast hole blockage length, which comprises the following steps: according to pre-acquired blast hole blockage detection data, analyzing the stress distribution in the blast hole to obtain a blast hole blockage analysis result; combining the blast hole blockage analysis result and preset impact parameters to construct an impact effect analysis model, predicting the dynamic distribution of energy in the blast hole to obtain an energy distribution result; based on the energy distribution result, taking each blast hole as a node and the position relationship between the blast holes as an edge to construct a blast area action graph; simulating the propagation process of impact stress waves and cracks, analyzing the node state after impact to obtain a first impact effect; analyzing the improvement direction through a preset impact improvement model to generate an improvement scheme; and the application can improve the measurement precision and accuracy of blast hole blockage parameters, enhance the authenticity and comprehensiveness of the overall blasting area fragmentation effect simulation process, and improve the impact effect.

A linkage for moving an implement between a working state and a stowed state with respect to a frame of a machine. The linkage includes a carriage, at least one arm assembly, and one or more bump stops. The carriage is configured to support the implement. The arm assembly is coupled to the carriage and is pivotable with respect to the carriage to move the implement to the stowed state. The bump stops are configured to contact an arm, of the arm assembly, in the stowed state of the implement to isolate impact stress away from the frame and onto the linkage.

The application discloses a wide-temperature-range low-air-pressure loading test method for a propulsion motor, relates to the field of propulsion motor testing, and aims at simulating high-altitude and high-altitude severe climate environment conditions by comprehensively considering wide-temperature-range high-low temperature alternating stress, variable environmental pressure stress, mechanical vibration and impact stress caused by air flow disturbance and alternating load stress. The application can realize comprehensive and accurate evaluation on the performance of the propulsion motor.

The application discloses high-strength non-magnetic drill collar, belongs to the technical field of oil drilling drilling tools, including: drill collar rod, one end of the drill collar rod is provided with a buffer head; drill collar head, the drill collar head is threadedly connected on one side of the buffer head, a T-shaped buffer groove is arranged in the buffer head, and a buffer disc spring is arranged in the T-shaped buffer groove; a connecting end is arranged on one side of the buffer head; a threaded connection groove is arranged on the inner circular wall surface of the drill collar rod; by arranging the buffer disc spring, injecting non-magnetic inert gas into the T-shaped buffer groove through the gas injection nozzle on the outside of the drill collar head, and buffering through the buffer disc spring and the buffer gas, the high-strength non-magnetic drill collar can absorb large impact load and high-frequency small impact load, effectively reduce the damage of impact stress to the drill collar rod, the buffer head and the connecting position, avoid the deformation of the drill collar body and the connection failure, and improve the applicability of the drill collar in deep high-impact drilling scenes.

A method of designing robot tools and parts includes the steps of determining a plurality of von Mises maximum impact stresses as a function of fillet radius of a family of robot tools of same shape and size; determining a lowest von Mises maximum impact stress from the plurality von Mises maximum impact stresses; and selecting a fillet radius for a robot tool based on the determined lowest von Mises maximum impact stress.

The invention relates to the field of safety protection materials, in particular to explosion-proof glass and a preparation process thereof. The explosion-proof glass prepared by the invention belongs to a multi-layer gradient composite structure, functions of all layers are sequentially transited from an impacted surface to a back surface, and mechanical gradient and function integration of'rigidity-flexibility-rigidity 'is realized. And the outer rigid protective layer is chemically strengthened glass or transparent microcrystalline glass. According to the present invention, with the function of the first defense line, the extremely high hardness and the extremely high strength are adopted to resist the impact and the scratch of sharp objects, disperse the impact stress, and prevent the generation and the expansion of the initial crack; the gradient transition self-repairing layer is a gradient composite material composed of several sub-layers. The reinforcements form a three-dimensional network, so that the modulus and toughness of the area are greatly improved, and microcracks transmitted from the outer layer can be effectively captured and passivated.

This invention relates to the field of peak impact force prediction technology for falling rocks, and specifically discloses a method for predicting peak impact force of falling rocks based on stress monitoring data of the roof slab of a tunnel, comprising the following steps: (S1) obtaining the value of the impact stress at the bottom of the buffer pad layer on the roof surface of the tunnel structure under the impact of falling rocks, and recording the peak impact stress σ. max (S2) If σ max The thickness of the buffer pad layer should be increased to exceed the design strength of the top surface of the shed. h ≥ h x (S3) Establish the distribution function σ( of impact stress). x (S4) Calculate the maximum diffusion radius of the impact stress. x max (S5) Calculate the distribution range of impact stress in the buffer layer. (S6) Calculate the peak impact force of the falling rock. F The peak impact force of falling rocks in this invention F The calculation formula does not depend on the shape, height, or motion of the falling rocks, providing a new approach to accurately predicting the impact force of falling rocks and offering a more accurate reference for the optimized design of tunnel structures.

The present application relates to the field of motion simulation, in particular to a motor life prediction method based on motion simulation, comprising the following steps: according to the automobile motion state test, the vibration displacement and frequency parameters are called to generate the transient acceleration time history load sequence; the space coordinates of the inner rotor core and the permanent magnet of the automobile motor are extracted, the transient acceleration time history load sequence is mapped to the interface node, and the rotor interface impact stress wave distribution is calculated. The present application combines the fatigue crack propagation threshold, the material fracture toughness threshold, the micro crack dynamic expansion step set and the impact load cycle number upper limit extreme value to make cumulative determination, can establish a clear boundary between the crack progressive expansion stage and the unstable fracture critical stage, make the permanent magnet fracture critical life prediction result consider the cycle damage accumulation process and the instantaneous fracture risk, and improve the critical determination accuracy of the automobile motor life prediction.

This invention discloses a drop hammer impact testing device, belonging to the technical field of impact testing devices. It solves the technical problem that different hammer radii affect the impact testing of specimens, and that changing to different specifications requires downtime for replacement, reducing the efficiency of specimen impact testing. The device includes a frame, an impact hammer, and a hammer adjustment mechanism. The impact hammer is installed inside the upper end of the frame. The hammer adjustment mechanism is symmetrically installed on the inner side of the frame, and works with the impact hammer to adjust the impact size on the specimen. The hammer adjustment mechanism includes an assembly plate for mounting multiple semi-rings of different specifications. This invention can change the contact size between the hammer and the specimen according to the needs of the specimen impact test, utilizing the impact stress on the specimen surface from hammers of different sizes, reducing the hassle of downtime for disassembly and replacement of hammers. Furthermore, changing the hammer size facilitates precise positioning, ensuring the accuracy of the hammer size and improving the efficiency of specimen impact testing.

The invention discloses a wide-temperature-range low-air-pressure loading test method for a propulsion motor, relates to the field of propulsion motor testing, comprehensively considers wide-temperature-range high-low-temperature alternating stress, variable environment pressure stress, mechanical vibration and impact stress caused by airflow disturbance and alternating load stress, and aims to simulate high-altitude and high-altitude atrocious weather environment conditions. According to the invention, comprehensive and accurate evaluation of the performance of the propulsion motor can be realized.

The invention discloses a dynamic buffer coefficient maximum stress method for simplified measurement of a material buffer curve. The method comprises the following steps: step 1, measuring to obtain a stress-strain sigma (epsilon)-epsilon curve of static compression of a buffer material; step 2, measuring a primary dynamic impact stress-strain curve of the buffer material under the falling height h and the liner thickness t, 3, predicting a dynamic impact stress-strain curve and a corresponding unit volume energy absorption-strain e-epsilon curve of the buffer material at the drop height h and the liner thickness t under different drop hammer masses; 4, setting a series of sigma s values on a [G]-sigma s buffer curve under a certain drop height h and a liner thickness t to be constructed; step 5, calculating a unit volume energy absorption em value corresponding to each sigma s value on a [G]-sigma s buffer curve under a certain drop height h and a liner thickness t to be constructed; step 6, obtaining a maximum strain epsilon m value and a maximum stress sigma m value corresponding to each sigma s value on a [G]-sigma s buffer curve under a certain drop height h and a liner thickness t to be constructed, and further determining a corresponding [G] value; and 7, drawing a [G]-sigma s buffer curve of the buffer material under the falling height h and the liner thickness t. Static compression and dynamic impact stress-strain curves of a certain buffer material under a drop height and a liner thickness are measured to establish a dynamic relation coefficient between the static compression and dynamic impact stress-strain curves, so that a corresponding [G]-sigma s buffer curve is constructed.

Through the use of an internal support system integrated with the interior shell of a hollow ball, the concentration of impact stress to the ball's shell during game play is reduced through better dispersion and resistance of applied force, while also reinforcing the ball's shell at its weakest points, which are the holes, thus making it more resilient and thereby less susceptible to breakage. Enhanced fortification against impact stress applied during gameplay serves to increase the usable life of the ball.

The invention discloses a bulletproof flashboard based on a soft-hard composite structure, and relates to the technical field of personal protection equipment, the bulletproof flashboard is of a multi-layer composite structure, and the bulletproof flashboard sequentially comprises a bullet facing surface functional layer, a middle functional layer and a bullet backing surface functional layer, the bullet facing surface functional layer, the middle functional layer and the bullet backing surface functional layer are sequentially connected and fixed; the bullet facing surface functional layer is a protective layer which is firstly in contact with a bullet body in the multi-layer composite structure; according to the bulletproof flashboard, the soft and hard composite structure design is innovatively adopted, the fiber-reinforced flexible matrix composite material and the fiber-reinforced rigid matrix composite material are selected for structural function integrated design, the ballistic limit of the bulletproof flashboard is remarkably improved by optimizing the sequence and interface design, high-speed projectile penetration can be effectively resisted, and the bulletproof flashboard has the advantages that the bulletproof flashboard is high in practicability and high in practicability. And the bullet facing surface functional layer, the middle functional layer and the bullet backing surface functional layer are arranged, so that impact stress waves can be efficiently attenuated through impedance mismatch in the multi-layer composite structure, and the impact stress waves are effectively prevented from damaging internal organs.