2191 results about "Energy absorption" patented technology

The invention relates to the technical field of bolt tightening, and provides an intelligent bolt tightening control method and system based on axial force measurement. Comprising the steps of collecting bolt identification and process parameter data, collecting temperature measurement data, and obtaining sound velocity compensation parameters and elastic modulus compensation parameters. And zero-load preloading data are collected and processed to generate zero-load baseline data, and a self-calibration model is obtained. Axial force data and ultrasonic echo data are collected, and an axial force fusion estimation result is obtained. And comparing an axial force fusion estimation result with target axial force data. And when in the target interval, fine twisting control is carried out based on model predictive control and a micro-stepping strategy, and the controllable damping unit is driven to carry out energy absorption and stopping. And acquiring an axial force fusion estimation result when the target axial force is reached, processing the data in the holding stage to obtain an axial force rebound check result, and if the axial force rebound check result exceeds the limit, performing secondary twisting control. According to the scheme, refinement and traceability of the bolt tightening process are achieved.

The invention discloses a digital calibration system and method for dynamic response parameters of a surge protection circuit, relates to the technical field of power electronic protection and test calibration, and is used for solving the problem that an existing surge protection circuit calibration method cannot reflect device degradation and dynamic response mismatch. Surge event voltage and current waveforms are collected through a synchronous trigger mechanism, non-stationary signal features are extracted through combined time-frequency analysis, and a voltage-current phase trajectory diagram is constructed to generate a response feature matrix; performing phase-space reconstruction on the matrix, calculating Kolmogorov entropy quantification system stability, and establishing a material degradation transfer function in combination with an energy absorption sequence to generate a grain boundary degradation index; key parameters are screened through L1 regularization regression, and a quantitative relation between a grain boundary degradation index and a protection threshold value is established to realize adaptive threshold value calculation; and executing strategy switching from calibration to predictive maintenance according to the degradation trend and threshold fluctuation change, and outputting a maintenance signal to complete dynamic accurate calibration and reliable operation of the surge protection circuit.

The invention discloses a multi-parameter collaborative optimization design method for lateral impact resistance of a honeycomb sandwich panel battery pack, and relates to the technical field of structural safety and lightweight design of new energy automobile battery packs. An existing battery pack generally has the defects of insufficient light weight, limited energy absorption efficiency and lack of multi-parameter collaborative optimization with an upper box body, a lower box body and a stiffening beam in impact resistance research. Therefore, according to the honeycomb sandwich panel battery pack lateral impact resistance multi-parameter collaborative optimization design and parameter calculation method, a honeycomb sandwich panel finite element model is established, performance parameters are obtained, an optimal energy absorption combination is screened, then a battery pack box body finite element model is established, and multiple design variables are set; and constructing a function relationship between variables and responses by utilizing an agent model, and carrying out multi-objective optimization by combining an NSGA-II algorithm to finally obtain an optimal design parameter meeting a safety threshold and carrying out simulation verification. The method is suitable for battery pack anti-impact protection design work of the electric automobile under the lateral collision working condition.

The invention discloses a pressure storage and heat storage coupled regenerative heat pump power storage system and a regulation and control method thereof. The system is composed of an electric-power generation integrated unit, an energy storage compression and energy release expansion integrated unit, an energy storage expansion and energy release compression integrated unit, a high-temperature heat exchanger, a backheating heat exchanger, a cold energy absorption heat exchanger, a heat storage and cold storage storage tank, a high-pressure gas storage tank and the like. And an energy storage / energy release loop, a heat storage / heat release loop, a cold storage / cold release loop and a pressure heat coupling loop are formed by connecting pipelines. In the energy storage mode, the compressor unit is driven by electric energy to conduct multi-stage compression, and compression heat and expansion cold are stored in the high-temperature storage tank and the low-temperature storage tank correspondingly. In the energy release mode, the heat storage medium and the cold storage medium are sequentially released to supply heat or cold to the circulating working medium, and the expansion unit is driven to drive the generator to generate electricity. According to the method, bidirectional operation of energy storage and energy release is achieved through valve switching and circulation control, and power output and load change are adjusted within a second level through a pressure-heat coupling mechanism.

The invention provides a coal mine fluidized mining dynamic disaster prevention and control method and system, and relates to the technical field of disaster prevention and control. The method comprises the following steps: establishing a risk map based on mining area multi-field information, setting a seismic source intensity upper limit, a path attenuation target and an energy absorption displacement target, implementing in-situ transformation under the constraint of a control index to form a distributed micro-fracture network, and calculating a residual dynamic load spectrum to weaken a seismic source; according to the residual dynamic load spectrum, constructing an artificial barrier and an energy absorption band with wave impedance abrupt change so as to realize propagation energy reduction; a flexible energy absorption protection system is configured according to the residual dynamic load spectrum and the propagation attenuation coefficient, micro-seismic, stress and displacement data are monitored in real time, and parameter self-adaptive correction is achieved through linkage treatment triggered by a threshold value. According to the method, a source-diameter-field integrated active prevention and control system is constructed, dynamic regulation and control and closed-loop management in the fluidized mining process are achieved, and the intrinsic safety and the intelligent level of deep mining are remarkably improved.

The invention discloses a damping shell easy to assemble and a kitchen waste processor using the damping shell. The damping shell comprises a shell body, an upper end cover is fixedly connected to the upper portion of the shell body, a plurality of supporting cushion blocks are fixedly connected to the upper portion of the bottom end of the shell body, and a plurality of fixing rod pieces are fixedly connected to the periphery of the upper end cover downwards; the top surface of the vibration isolation base is upwards and fixedly connected with hoisting rod pieces corresponding to the fixed rod pieces, and the hoisting rod pieces are respectively fastened and mounted on the corresponding fixed rod pieces through corresponding locking assemblies, so that the vibration isolation base is positioned on the upper side of the supporting cushion block to form suspension mounting; the vibration isolation supporting assembly comprises a rotating plate rotationally installed on the bottom side of the vibration isolation base, the periphery of the rotating plate extends outwards to be provided with supporting parts, and the bottom sides of the supporting parts are fixedly connected to the upper sides of the corresponding supporting cushion blocks in an abutting mode; provided is a vibration reduction and energy absorption device. The vibration reduction effect can be effectively and obviously improved, and the machine core of the kitchen garbage processor can be conveniently installed.

The invention provides a compression-torsion coupled metamaterial cell element and a negative Poisson's ratio energy absorption structure composed of the compression-torsion coupled metamaterial cell element, and relates to the technical field of compression-torsion energy absorption metamaterials. The cell element comprises an upper connecting plate assembly and a lower connecting plate assembly, an upper-layer four-rod tensioning assembly and a lower-layer four-rod tensioning assembly are arranged between the upper connecting plate assembly and the lower connecting plate assembly, each of the upper-layer four-rod tensioning assembly and the lower-layer four-rod tensioning assembly comprises four compression rigid rod pieces and a plurality of tension elastic bodies, the compression rigid rod pieces are staggered in space to form a quadrangular prism-like frame, and the tail ends of the upper compression rigid rod piece and the lower compression rigid rod piece are hinged; adjacent hinge points and two corresponding corners of the surfaces of the upper connecting plate assembly and the lower connecting plate assembly are connected through tensile elastic bodies and apply pre-tightening force; the energy absorption structure is formed by combining a plurality of cell element arrays, and the negative Poisson's ratio effect is achieved by regulating and controlling the arrays. According to the cell element, a tensioning structure is integrated into a metamaterial configuration, the cell element has the compression-torsion coupling characteristic, the non-localized deformation response of the structure is achieved, and the energy absorption structure has the negative Poisson's ratio effect and provides excellent bearing and impact resistance through an efficient energy absorption mechanism.

The invention discloses an energy-absorbing reinforced honeycomb structure with the Poisson's ratio capable of being adjusted positively and negatively and a design method, and relates to the field of honeycomb structures. Two horizontal outer ribs and four inclined outer ribs of the honeycomb structure form a hexagon; the two ends of the first arc-shaped inner rib are connected with the left upper vertex and the left lower vertex of the hexagon and are concave towards the left vertex of the hexagon; the second arc-shaped inner rib is connected with the right upper vertex and the right lower vertex of the hexagon and is concave towards the right vertex of the hexagon; two ends of one horizontal inner rib are respectively connected with the left vertex of the hexagon and the first arc-shaped inner rib, and two ends of the other horizontal inner rib are respectively connected with the right vertex of the hexagon and the second arc-shaped inner rib; and the circular ring is embedded in the convex parts of the two arc-shaped inner ribs. According to the honeycomb structure, the positive Poisson's ratio honeycomb and the negative Poisson's ratio honeycomb are fused through the two horizontal inner ribs, so that the inner ribs and the outer ribs are mutually balanced, the circular ring design is added, and the structural strength is improved; through the thickness parameter design of the inner ribs and the outer ribs, flexible transformation of the positive Poisson's ratio or the negative Poisson's ratio is achieved on the premise that light weight and high strength are guaranteed.

The invention belongs to the technical field of metamaterials, and particularly relates to a diamond substrate lattice metamaterial and an additive manufacturing method thereof. The structure is designed based on the geometric configuration of a diamond lattice, and has excellent high specific absorption mechanical properties. The design process comprises the following steps: firstly, carrying out spatial registration positioning on the basis of a unit cell structure with a preset wall thickness t and a unit cell width a; then, through a multi-unit-cell splicing design, the unit cells are spliced repeatedly for 12 times to form three-dimensional periodic stacking; then, the stacked structure is cut along the six datum planes; then cross plates are inserted into the six cutting faces respectively to enhance the integrity and strength of the structure; and finally, a complete DM plate lattice metamaterial structure is formed. The structure is provided with a plate-plate cross supporting framework, a complex three-dimensional inner cavity and highly symmetrical space distribution, the energy absorption capacity under unit mass is greatly improved, the mechanical properties are basically consistent in multiple directions, and the structure is suitable for the engineering fields of impact protection, energy absorption buffering and the like.

The invention discloses an industrial robot motion planning system and method based on artificial intelligence, and belongs to the field of industrial robot intelligent obstacle avoidance. Based on a visual sensor, a depth sensor and a material priori library, feature extraction and attribute judgment are performed on an obstacle, and the risk is preliminarily evaluated; based on a force control sensor at the tail end of the robot and low-speed contact motion, contact force and displacement curve changes are obtained, the deformable characteristic of an obstacle is evaluated, and based on a deformation potential value, contact force and displacement curve analysis, contact stress calculation and obstacle energy absorption calculation, the damage risk of the obstacle is evaluated. The contact impact energy and the damage coefficient of the robot are evaluated based on the quality, the running speed and the anti-seismic coefficient of the industrial robot, the danger of the robot facing the obstacle is comprehensively evaluated based on the obstacle initial judgment risk, the damage probability and the robot damage coefficient, and the working efficiency and safety of the industrial robot are improved.

An integrated energy absorbing system of a vehicle with a front integrated energy absorbing casting and a back integrated energy absorbing casting. Each front and back casting is a single unified casting that makes up the integrated energy absorbing system. Ribbed sections such as “I” sections and “C” sections make up the castings and are formed from a variety of different techniques and / or formings such as cutout, waveform profile, tapering, flaring and / or rib spacing. Additional sections such as closed section castings may also be integrated in the integrated energy absorbing system.

The invention relates to the technical field of lattice structure topological optimization, and discloses a multi-scale hybrid lattice structure double-variable topological optimization method, which comprises the steps of defining double variables, including a first design variable as a scaling scale and a second design variable as a relative density; determining a basic unit cell of the hybrid lattice structure and obtaining a corresponding unit cell size, wherein the second design variable is determined based on the unit cell size; obtaining a first filling unit cell and a second filling unit cell; determining a design domain, and filling the first filling unit cells and the second filling unit cells into the design domain by taking the flexibility minimization of the hybrid lattice structure as a target and the volume fraction as a constraint; and optimizing the filling process based on a moving asymptote optimization algorithm so as to carry out topological optimization of the hybrid lattice structure based on double variables, and outputting an optimized multi-scale hybrid lattice structure. According to the industrial bearing structure, higher structural specific stiffness, specific strength and energy absorption efficiency are achieved, and the requirements for light weight, self-adaption and high performance in an existing industrial bearing structure can be met.

The invention discloses a kilometer deep well roadway toughness regulation and control supporting system and a dynamic design method, and belongs to the field of deep well roadway supporting. The supporting system comprises a multi-layer collaborative structure and an intelligent regulation and control module, the multi-layer collaborative structure sequentially comprises a shape memory alloy energy absorption layer used for resisting impact loads and a gradient pore foam metal buffer layer used for energy grading dissipation from inside to outside, and the multi-layer collaborative structure is connected with roadway surrounding rock in an anchoring mode through an anchor rod anchoring structure; the intelligent regulation and control module comprises a distributed optical fiber sensor array used for monitoring surrounding environment signals of surrounding rock in real time, an electrostriction driver used for regulating and controlling the rigidity of the multi-layer cooperative structure and a multi-channel data fusion terminal used for achieving underground and surface data transmission synchronization. By the adoption of the kilometer deep well roadway toughness regulation and control supporting system and the dynamic design method, the problems that a traditional supporting mode is too high in material rigidity, lacks dynamic regulation and control capacity and is insufficient in impact toughness can be solved.

The invention discloses a strong anti-overturning power generation device and method based on wind wave combined capture, and the device comprises a four-column type semi-submersible fan platform and a wind driven generator located above the four-column type semi-submersible fan platform, and the four-column type semi-submersible fan platform comprises hollow columns. The bottom of the hollow stand column is fixedly connected with the bottom of the outer side stand column through a horizontal column, a floating wave energy absorption system is arranged on the outer side of the outer side stand column, and the output end of the floating wave energy absorption system is connected with the input end of a power generator system through a bevel gear power generation system in the hollow stand column. One end of the floating wave energy absorption system is connected with the spring system in the hollow stand column; the core technical problems that an existing device is poor in stability, high in cost, low in efficiency, weak in adaptability and the like are solved.

The invention relates to a negative Poisson's ratio composite anti-explosion wallboard unit, an anti-explosion wallboard structure and a construction method of the anti-explosion wallboard structure. The anti-explosion wallboard unit comprises an impact protection layer, a negative Poisson's ratio steel plate layer, a multifunctional back plate layer and a buffering energy absorption layer from outside to inside. The outer surface of the impact protection layer is an anti-impact wave curved surface; the negative Poisson's ratio steel plate layer is composed of two layers of negative Poisson's ratio steel plates which are arranged in parallel, a containing cavity is formed in each layer of negative Poisson's ratio steel plate, a plurality of rhombic negative Poisson's ratio units are evenly distributed in each containing cavity, and hinge joints are formed between the end points of the rhombic negative Poisson's ratio units and the inner wall of a cavity body of each containing cavity; the multifunctional backboard layer comprises a support body and an assembly space arranged along the back surface of the support body, and the assembly space is used for detachably embedding a functional board; and the buffer energy absorption layer is used for absorbing and dissipating residual energy attenuated by the layers. Through a multi-stage collaborative energy consumption mechanism of curved surface deflection, negative poisson ratio structure energy absorption, back plate dispersion and elastic body buffering, the anti-knock performance and the energy dissipation efficiency of the wallboard are remarkably improved.

The invention provides a negative poisson ratio tension metamaterial structure and application thereof in impact resistance of an unmanned aerial vehicle. The negative Poisson's ratio stretch-draw metamaterial structure is composed of a plurality of two-dimensional D-bar stretch-draw integral structures. The two-dimensional D-bar stretch-draw integral structure is composed of a plurality of two-dimensional D-bar stretch-draw unit structures. The two-dimensional D-bar tensioning unit structure is composed of four same rod pieces, four rigid hinges and two same elastic ropes. Wherein every two of four rod pieces of the two-dimensional D-bar tensioning unit structure are connected through a rigid hinge to form a quadrilateral structure, and the four rigid hinges are diagonally connected and fixed through two elastic ropes; and two elastic ropes are adopted for fixing. Compared with other stretch-draw metamaterial structures, the stretch-draw metamaterial based on the two-dimensional D-bar has the advantages that the negative Poisson's ratio structure can be utilized to show better energy absorption characteristics, and when the unmanned aerial vehicle collides or falls off, impact force can be effectively dispersed, and damage to an aircraft body is reduced.

The invention discloses steel fiber reinforced metakaolin-based recycled concrete and a preparation method thereof, and belongs to the technical field of civil engineering materials. The concrete is prepared from the following components in percentage by mass: 60wt%-80wt% of recycled aggregate, 20wt%-40wt% of a cementing material, 0.5 wt%-1.4 wt% of steel fibers and 0.1 wt%-0.7 wt% of an additive, wherein the cementing material comprises cement and metakaolin, and the mass ratio of the metakaolin to the cement is (1-3): (7-9). A nano silicon dioxide coating is arranged on the surface of the steel fiber. The preparation method adopts a step-by-step stirring process. The problem that dynamic impact resistance and green low carbon are difficult to cooperate in the prior art is solved, through component optimization and process control, the dynamic compressive strength of the concrete is improved, the energy absorption capacity is improved, the damage mode is converted into ductility from brittleness, fiber distribution is uniform, and the concrete is suitable for impact-resistant projects such as airport runways and protective structures.

The invention relates to the technical field of ultrasonic riveting, in particular to a 224G high-speed wire harness assembling method and system based on ultrasonic riveting, and the method comprises the steps: carrying out the pretreatment of a high-speed wire harness raw material, and obtaining a pre-riveted wire harness; aligning the pre-riveted wire harness with a pre-constructed target connector to obtain a to-be-riveted wire harness; riveting the to-be-riveted wire harness by using the ultrasonic parameter value, the environment temperature value and the riveting time, and monitoring the to-be-riveted wire harness during riveting in real time based on the riveting monitoring instruction to obtain a compression deviation value and an energy absorption value; based on the compression deviation value and the energy absorption value, acquiring an updated ultrasonic frequency value by using a fuzzy control algorithm, and acquiring a pre-confirmed high-speed wire harness by using the updated ultrasonic frequency value; and performing quality detection on the pre-confirmed high-speed wire harness to obtain a target high-speed wire harness, and realizing the assembly of the high-speed wire harness based on the target high-speed wire harness. According to the invention, high-precision assembly of the high-speed wire harness can be realized by utilizing ultrasonic riveting.

The invention relates to the technical field of aero-engine nondestructive testing, and discloses a method for detecting defects and thickness of a surface coating of an aero-engine blade. The invention designs a novel acoustic impedance sensor special for a blade coating, the novel acoustic impedance sensor comprises a plurality of independently controlled transduction units, each transduction unit has multi-band detection capability, main resonant frequencies of different transduction units are configured in a differentiated manner, and during detection, the novel acoustic impedance sensor is coupled to the surface of a blade; the material state is reversely deduced by measuring the energy absorption spectrum of broadband sound waves in the coating, and the blade surface coating defect and thickness detection is achieved.

The vehicle body structure comprises a front wall cross beam assembly and a middle channel, the front wall cross beam assembly comprises a coaming area, a cross beam body and a front wall lower plate which are sequentially connected from top to bottom, the middle channel is located on the rear side of the front wall lower plate and fixedly connected with the front wall lower plate, and the vehicle body structure further comprises a reinforcing structure, the front wall beam assembly is fixedly connected with the rear side face of the front wall beam assembly and fixedly connected with the middle channel. The energy absorption structure protrudes out of the front side face of the front wall lower plate and is fixedly connected with the front wall lower plate. The projections of the energy absorption structure and the middle channel in the X direction of the vehicle body are at least partially overlapped. According to the vehicle body structure, the front wall cross beam assembly is supported through the middle channel, and the supporting strength of the front wall cross beam assembly is improved. By means of the energy absorption structure, when the front portion of the vehicle collides, energy absorption and buffering effects can be directly achieved on devices such as a power assembly in the cabin in a targeted mode, the entering amount of the devices such as the power assembly in the cabin in a passenger compartment is reduced, and the problems that the invasion amount of a front wall is too large, and the collision resistance of the whole vehicle is poor are solved.

The invention belongs to the cross technical field of artificial intelligence and environmental protection engineering, particularly relates to a denitration catalyst microwave regeneration optimization method based on machine learning, and aims to solve the problems of inaccurate energy matching, large structural damage and low efficiency of a traditional regeneration method. The method comprises the following steps: constructing a catalyst multi-dimensional feature database, establishing a microwave regeneration multi-physics field coupling simulation model, and training an integrated learning prediction model to associate input features with a regeneration effect; in the regeneration process, infrared thermal imaging, microwave reflection and gas sensing equipment are integrated, temperature field, energy absorption and tail gas data are collected in real time, and microwave power, frequency and atmosphere parameters are dynamically regulated and controlled. Accurate energy release and closed-loop intelligent regulation and control are achieved, the activity recovery rate after regeneration exceeds 92%, the specific surface area retention rate exceeds 85%, the regeneration period is shortened to one third of that of a traditional method, energy consumption is reduced by 40%, full-life-cycle intelligent management of the catalyst is supported, and economical efficiency and sustainability of environmental protection equipment are remarkably improved.

The invention relates to an abrasive belt heat absorption performance detection device and method, and relates to the technical field of abrasive belt performance detection.The abrasive belt heat absorption performance detection device comprises a workbench and grinding equipment arranged on the workbench, and the workbench is provided with a grinding assembly for grinding an abrasive belt and a detection assembly for detecting the surface of the ground abrasive belt; the grinding assembly comprises a fixing frame arranged on the workbench in a sliding mode, an abutting plate is arranged on the fixing frame in a penetrating mode, a fixing roller is rotationally arranged on the abutting plate, and a grinding block movably abutting against the abrasive belt is detachably arranged on the peripheral wall of the fixing roller. The workbench is provided with a swinging piece enabling the grinding block to swing, a driving piece driving the fixed roller to periodically slide along the working face of the abrasive belt, a heating piece heating the grinding block and a second power piece driving the fixed frame to slide. The abrasive belt energy absorption performance detection device has the effects that the abrasive belt energy absorption performance detection efficiency is improved, and meanwhile the intuition and representativeness of the detection result are improved.

The invention belongs to the technical field of cable mounting tools, and particularly relates to an anti-falling aerial cable clamping and mounting structure which comprises a bottom clamp and a top clamp, and the top clamp is arranged above the bottom clamp. And a tension spring is arranged between the top clamp and the bottom clamp, so that the top clamp downwards clamps the cable under the action of the tension spring. Arc-shaped clamping grooves are formed in the opposite faces of the bottom clamp and the top clamp, and mounting planes are arranged at the left ends and the right ends of the opposite faces of the bottom clamp and the top clamp. The bottom clamp comprises a bearing clamp on the upper portion and a fixing base on the lower portion, the bearing clamp is connected to the upper portion of the fixing base in a sleeved mode, and the bearing clamp can move up and down on the fixing base in a limited mode. Through the integrated design of elastic pre-tightening, double limiting and buffering energy absorption, stable clamping, dynamic adaptation and damage protection of the cable are achieved, and the cable clamp is suitable for various installation scenes such as a power transmission tower and a telegraph pole cross arm and can tolerate cable installation in severe environments such as high and low temperature, strong wind and salt mist.

The utility model relates to a constant-resistance yield anchor rod and anchor cable, and belongs to the technical field of civil engineering, rock and soil slope treatment and mining engineering supporting. The anchor rod comprises a yield pipe, a rod body, an extrusion head and a force transmission system, the yield pipe is a straight circular steel pipe, periodic indentation lines are arranged on the middle section of the outer wall of the yield pipe, and constant-resistance energy absorption is achieved through gradual buckling deformation of the indentation lines; the rod body penetrates through an inner cavity of the yield pipe, an extrusion head with hardness higher than that of the pipe wall is fixed at the near end, and a birdcage-shaped expanding device is arranged at the far end to enhance anchoring; the force transmission system ensures the load transmission efficiency through a supporting base plate and a force transmission ring. According to the utility model, the contradiction between material strength and ductility is converted into controllable buckling deformation through structural collaborative design, and the controllable buckling deformation anchor rod has the advantages of low cost, long displacement energy absorption (millimeter-meter level), controllable bearing capacity level (yield pipe > extrusion head > rod body), multi-scene adaptation and the like, and is suitable for rock-soil body support under the conditions of earthquake, rock burst and large deformation of surrounding rock.

The invention discloses a novel bionic arc-shaped reinforced re-entry honeycomb structure and a platform stress theoretical model, and arc-shaped supports are embedded into traditional re-entry unit cells by utilizing a bionic principle to trigger coupling deformation of multiple plastic hinges, so that the strength, rigidity, stability and energy absorption of the structure are remarkably improved. A platform stress theoretical model of the novel structure is provided based on an energy conservation principle, so that the cost of time, workload and the like of numerical simulation and experiments in a preliminary optimization design stage of the structure is remarkably reduced. Under the parameters of the invention, the platform stress and the specific energy absorption of the reentrant honeycomb structure are up to 10.4 times that of the traditional reentrant honeycomb structure, the rigidity and the stability of the reentrant honeycomb structure are improved to 11.7 times and 1.7 times, and the stable deformation mode and the crushing force efficiency of the reentrant honeycomb structure are superior to those of the traditional reentrant honeycomb structure. The composite material is suitable for scenes requiring high energy absorption and stable impact resistance, such as the protection fields of equipment such as pier collision resistance, canal collision resistance gates, automobile collision resistance, aircraft wing buffer layers and run-flat tires in civil engineering.

The invention relates to the technical field of vehicle power systems, in particular to a solid hydrogen storage device containing a low-temperature cold-start hydrogen storage cylinder and a fuel cell collaborative power assembly, and the device comprises a heat flow modulation module, a balance driving module, a release coordination module, a power matching module and a power assembly control module. In the hydrogen storage process, through real-time linkage judgment of the interface temperature difference and the heat flux change, directional feedback of energy in different areas is achieved, the stable hydrogen release condition of the hydrogen storage material is maintained, differentiated distribution is conducted on heating power according to the heat flux density deviation, invalid energy consumption and local energy accumulation are avoided, and the energy storage efficiency is improved. Dynamic balance is constructed between the hydrogen release rate and the phase change medium energy absorption rate, the hydrogen supply process is corrected through filtering estimation, the release flow is more stable and controllable, finally, the hydrogen supply stability and the load requirement are combined in the power output link, dynamic matching of the galvanic pile power and the external working condition is achieved, and the energy efficiency is improved. And the response flexibility and the energy conversion efficiency of the power system are improved.

The invention provides a composite bionic electric vehicle battery compartment with a lateral impact-resistant reinforcing structure, which is applied to the technical field of battery compartment design and comprises a bearing frame and a reinforcing flange, and the reinforcing flange comprises outer convex wave crest parts and inner concave wave trough parts which are sequentially and alternately arranged along the top outline of the bearing frame; the bearing frame comprises hollow bearing units, the bearing units are arranged in the main frame body and are sequentially and transversely arranged, and the adjacent units are connected through longitudinal reinforcing ribs; each bearing unit comprises a center part, inclined reinforcing ribs and transverse supporting ribs, the center part is of a regular hexagon structure formed by connecting six auxiliary reinforcing ribs, the upper auxiliary reinforcing rib and the lower auxiliary reinforcing rib are connected with the main frame body, the connecting ends of the left side and the right side are connected with the transverse supporting ribs respectively, and the inclined reinforcing ribs distributed in an array mode are arranged on the transverse supporting ribs; the inclined reinforcing ribs and the auxiliary reinforcing ribs at the corresponding positions are parallel and equal in length. According to the invention, the lateral impact resistance, bending resistance, torsion resistance and vibration reduction and energy absorption performance of the battery compartment are remarkably improved while the light weight is realized.

The utility model relates to the technical field of expressway guardrails, in particular to an expressway anti-collision guardrail which comprises a fixed stand column, a movable stand column and an anti-collision device. The wave-shaped beam plates are continuously arranged along the edge of the road and are parallel to the fixed stand columns; and the horizontal connecting beam stretches across the corrugated beam plate and the fixed stand column, one end of the horizontal connecting beam is rotationally connected with the corrugated beam plate through a rotary connecting sleeve, and the other end of the horizontal connecting beam is rotationally connected with the fixed stand column through a buffer connecting sleeve. Through the arrangement of the rotary connecting sleeve and the buffer connecting sleeve, the wave-shaped beam plate can generate plastic deformation to absorb energy during collision and can also translate towards one side of the fixed stand column, and the translating motion drives the buffer connecting sleeve to rotate around the fixed stand column, so that the fixed limiting block sequentially collides with the limiting buffer plates; therefore, the energy absorption capability of the whole system is greatly enhanced.

The invention discloses a buffering and energy-absorbing ducted fan shell structure which comprises a paper folding structure, an elastic hinge, a sliding rail, a supporting plate, a ducted outer wall, a ducted inner wall, an inner energy-absorbing layer and an outer energy-absorbing layer. The duct outer wall firstly deforms and absorbs energy; then the internal energy absorption unit, the inner energy absorption layer and the outer energy absorption layer further absorb energy and disperse loads; the inner wall of the duct provides support; wherein the paper folding structure provides rigid support and load dispersion, and the elastic hinge coordinates deformation of the paper folding structure, so that the elastic hinge can drive the paper folding structure to deform, a load transmission path is optimized, and the problem that load transmission is discontinuous when the paper folding structure impacts is solved; the inner energy absorption layer and the outer energy absorption layer are filled with TPU foam materials and PMI foam materials respectively, so that the energy absorption effect is enhanced, and the structural stability can be maintained to a certain extent.

The invention discloses an ultrasonic welding quality online detection system and method, and belongs to the technical field of laser non-contact measurement. According to the invention, the laser vibration measurement probe is rigidly coupled to the welding head to construct a follow-up-common-optical-path measurement unit, so that synchronous acquisition of vibration signals with zero mass loading is realized; further extracting an attenuation section after welding is finished from the signal, and inverting an equivalent modal damping ratio representing an interface energy dissipation state based on an exponential attenuation model; meanwhile, multi-dimensional physical indexes such as an energy transfer efficiency index Itrans and an input stability index Iin are calculated, and in combination with an energy absorption state index, collaborative fusion is carried out through a weighted fusion formula to obtain a comprehensive quality score; and finally, realizing quality attenuation early warning based on time sequence trend analysis of a scoring sequence. On-line sensing of the deep dynamic state in the welding process is achieved, the early defect recognition sensitivity and the system anti-interference capacity are remarkably improved, and the predictive maintenance capacity of quality degradation is achieved.