196 results about "Structural reliability" patented technology

The invention provides a structure reliability analysis method based on an adaptive variable fidelity model, and the method comprises the steps: generating an initial sample point set which is uniformly distributed and has representativeness through an improved random sampling method KMODMC, enabling the initial sample point set to comprise a low-fidelity sample set and a high-fidelity sample set, training a BP neural network through employing the low-fidelity sample set, and carrying out the training of the BP neural network through employing the high-fidelity sample set; a low-fidelity BP neural network model is obtained; meanwhile, based on an error training Kriging model of a high-fidelity sample set and a low-fidelity model predicted value, an error correction Kriging model is constructed, the low-fidelity BP neural network model and the error correction Kriging model are combined to form a multi-fidelity mixed agent model, and adaptive iterative optimization is performed through a double-model alternate point adding sampling strategy. And finally obtaining a high-precision multi-fidelity hybrid agent model for structural reliability evaluation. According to the method, the problems of high cost of high-fidelity simulation calculation and insufficient precision of a low-fidelity model are solved, and the adaptive capacity and prediction precision of the model in a complex nonlinear problem are effectively improved.

The invention relates to the technical field of hydroelectric power generation equipment structure reliability evaluation, and particularly provides a water turbine top cover bolt time-varying reliability evaluation method and device based on parameter sensitivity analysis. According to the technical scheme provided by the invention, key variables are highlighted through parameter sensitivity analysis, and the response surface method and Monte Carlo simulation are combined, so that the calculation efficiency is remarkably improved while the precision is ensured, and the reliability evolution rule of the bolt in the whole life cycle can be scientifically represented; and an important basis is provided for maintenance decision and structure optimization of the water turbine top cover bolt.

The invention provides an efficient and high-precision prediction method for the minimum failure probability of an aviation structure system based on an exponential penalty learning mechanism, and relates to the technical field of structural reliability analysis. Respectively generating an initial sample and a candidate sample according to the probability density function of the random variable of the performance function to be analyzed; real performance function responses corresponding to the initial samples are calculated to form an initial training sample set, and an initial Kriging agent model is constructed; selecting an optimal sample point from the candidate sample set through the proposed EPAL function; merging the optimal sample and the real response thereof into the initial training sample set, and iteratively updating the Kriging model until an error-based stopping criterion is met; judging whether the failure probability variation coefficient meets the requirement or not; and finally, calculating the failure probability of the structure based on a trained Kriging model and a Monte Carlo method.

The invention provides an intelligent detection method and system for absolute stress of a steering axle of a port machine, and relates to the technical field of stress measurement and detection. Carrying out synchronous correction and feature modeling on the collected data, and constructing an absolute stress calculation and intelligent analysis model; screening a structure benchmark operation interval based on the operation data, constructing a benchmark stress reference state, and evaluating the stability of the structure benchmark; on the basis, multi-axis decomposition is carried out on the absolute stress, a multi-axis stress decoupling coefficient is calculated, and multi-axis stress safety judgment and coordinated regulation are achieved; and further combining the stress time sequence evolution characteristics and the fatigue accumulation effect, evaluating the long-term stress evolution risk of the structure, and implementing steering, loading and maintenance strategies when the risk exceeds the limit. According to the method, online sensing, risk early warning and closed-loop optimization of the absolute stress of the steering axle are realized, and the operation safety and the structural reliability of the port machinery are improved.

This application relates to a horn-shaped twisted panel assembly for decorative purposes, belonging to the technical field of decorative materials. It includes a horn-shaped decorative panel with a reinforcing mechanism fixedly connected internally. The reinforcing mechanism includes a reinforcing frame, which is externally fixedly connected to the interior of the horn-shaped decorative panel. A honeycomb reinforcing plate is fixedly connected internally to the reinforcing frame, and a reinforcing support plate is fixedly connected to the bottom inner side of the reinforcing frame. A stabilizing support component is fixedly connected to the bottom of the reinforcing support plate. This application achieves a stable structural connection for the horn-shaped decorative panel through the synergistic action of the reinforcing frame, honeycomb reinforcing plate, and reinforcing support plate, effectively improving its compressive strength. The combination of bottom stabilizing columns, stabilizing ribs, and stabilizing rods enhances the stability of the decorative panel, improving its structural reliability and durability, reducing the risk of deformation and damage, and extending its service life.

The invention discloses a solid non-compact filling hydraulic support which comprises a base and a shield beam, the top of the base is connected with a top beam through two stand columns, a platform base is further installed on the base, a pedestrian passageway is formed between the stand columns and the platform base, one end of the shield beam is hinged to the top beam, the other end of the shield beam is connected with the platform base, and a balance oil cylinder is arranged below the connecting position of the top beam and the shield beam. Two ends of the balance oil cylinder are respectively connected with the top beam and the shield beam; the platform base comprises supporting legs and a horizontal platform, one end of the horizontal platform is connected with the supporting legs, the other end of the horizontal platform is overhung backwards, the tail of the horizontal platform is connected with a vertical lug, and the vertical lug is hinged to one end of the shield beam; a bottom discharging type conveying scraping plate is further laid on the horizontal platform, a hole is formed in the horizontal platform, and gangue is filled in a non-dense leaked gangue mode through a bottom discharging opening and the hole. The problems that in the prior art, due to the fact that a support is complex in structure, transportation and assembly are difficult, operation efficiency is low, and structural reliability and operation safety are poor are solved.

The utility model discloses a kind of broken ore double-beam head-and-back use hook anti-drop device, it is related to hook anti-drop device technical field, including hook main part, the sliding arc groove being opened in the both sides of hook main part, the anti-drop blocking half ring one and the anti-drop blocking half ring two slidingly connected in the inner wall of two groups of sliding arc groove, the auxiliary locking assembly being set to the outer wall of hook main part, the auxiliary locking assembly is used to lock the anti-drop blocking half ring one and the anti-drop blocking half ring two to make both with the detachable fixed connection of hook main part. The utility model is closed by the opening of hook main part by the anti-drop blocking half ring one and the anti-drop blocking half ring two along sliding arc groove sliding, cooperate the locking structure of threaded insertion rod and threaded positioning hole, form closed ring, can effectively prevent steel wire rope from detaching from hook due to shaking, vibration etc. in the process of lifting, solve the problem that traditional hook anti-drop structure is insufficient in reliability, especially applicable to broken ore scene frequently lifting, the environment of complex working condition.

This invention discloses a multi-layered internal structure for shield tunneling based on a steel-concrete composite structure, including a flue slab, an upper lane slab, and a lower lane slab. The flue frame structure of the flue slab is connected to the steel plates pre-embedded in the corresponding tunnel segments, and the edges of the corresponding steel-concrete composite slab are sealed to the corresponding tunnel segments by cast-in-place concrete. The upper lane frame structure of the upper lane slab is fixed to the steel plates pre-embedded in the corresponding tunnel segments by multiple upper lane steel brackets. The lower lane slab has precast components at the bottom of the tunnel, with steel-concrete composite slabs on both sides, and the outer sides of the steel-concrete composite slabs are supported on steel longitudinal beams. The steel longitudinal beams are fixed to the steel plates pre-embedded in the corresponding tunnel segments by multiple lower lane steel brackets. During construction, the lower lane slab, upper lane slab, and flue slab are constructed sequentially from bottom to top, and finally the asphalt pavement layer is laid. The application of this invention reduces the self-weight, eliminates the need for rebar installation in tunnel segments, improves structural reliability and construction efficiency, and also frees up internal space in the tunnel.

The compression roller assembly of the vertical type circular mould granulator comprises an eccentric compression roller piece and an adjusting assembly, after a driving force is applied to an adjusting rod, a rotating shaft is driven to rotate through an adjusting plate, and the eccentric compression roller piece is driven to rotate through the adjusting assembly. A gap between the eccentric compression roller piece and a mold on the vertical ring mold granulator is adjusted; and a thinning groove is formed in the adjusting rod. Therefore, the thinning groove is formed in the adjusting rod, the structural strength of the adjusting rod on the part can be reduced through the thinning groove, and the adjusting rod is prone to breakage at the position of the thinning groove or near the position of the thinning groove after being subjected to external force exceeding the preset size; therefore, the eccentric compression roller piece or the mold can be prevented from being damaged due to continuous high-strength confrontation between the eccentric compression roller piece and the mold, so that the structural reliability of the eccentric compression roller piece and the mold can be improved, and the service life of the eccentric compression roller piece and the mold can be prolonged.

The utility model discloses a kind of split shaving cutter for machining gear, to solve the problem of high cost of traditional integrated structure, waste resources, realize tool body replacement alone, tool holder reuse, it includes tool body and steel tool holder, tool body coaxial sleeve is connected in tool holder, tool holder is equipped with root cleaning, first reference surface and the blocking ring of second reference surface with inclination, tool body is positioned by lower end face adhering first reference surface, connecting through-hole wall abutting second reference surface, and is connected with cooperation positioning bolt.The stress concentration is reduced by being equipped with avoidance ring groove, the stability of positioning member and positioning groove adaptation enhances, positioning member adopts rectangular part and semicircular part adhering structure, inside side angle is equipped with avoidance cutting surface to facilitate assembly and disassembly.The design reduces cost, improves machining precision stability and structural reliability, optimizes assembly efficiency.

The invention relates to the technical field of three-section hidden rails, in particular to a true synchronous three-section sliding rail assembly and a hidden sliding rail, the true synchronous three-section sliding rail assembly comprises a middle rail, a gear and two sets of outer rail components, the two sets of outer rail components are slidably assembled on the upper side and the lower side of the middle rail respectively, and each outer rail component comprises a U-shaped rail and a rack; the racks are connected to the inner wall of the U-shaped rail, the middle rail is provided with a cavity, the gears are rotationally assembled in the cavity, the gears are exposed out of the top and the bottom of the middle rail and used for being in meshing transmission with the racks of the two sets of outer rail components, the gears are arranged in the cavity of the middle rail, and the racks are directly fixed to the U-shaped rail. The problem of false synchronization or asynchronization possibly caused by traditional indirect transmission through a sliding piece is solved, synchronous movement of the movable rail and the fixed rail is achieved, it is guaranteed that the extending lengths of the sliding rails on the left side and the right side are consistent in the drawing process of the drawer, and the bearing capacity and the structural reliability of the sliding rails are improved.

The invention discloses an equal-groove-width variable-pitch engineering tire pattern structure giving consideration to low noise and full abrasion period equal saturation, and relates to the technical field of tires. The technical bottlenecks of single performance, inconsistent performance of each pitch, uneven abrasion, poor structural reliability and low universality in the variable pitch design of the traditional engineering tire are broken through, and through the integrated innovative design of the equal-groove-width foundation design, the density differentiation matrix solid salient points and the third-order universal pitch proportion, the variable pitch design of the engineering tire is achieved. The low noise, the performance consistency, the uniform abrasion and the structural reliability are synergistically considered, and the use requirements of heavy load and multiple working conditions of the engineering tire are comprehensively met.

The application relates to a high-voltage direct-current relay. The high-voltage direct-current relay comprises a pushing seat, a moving spring mechanism and a leaf spring located between the pushing seat and the moving spring mechanism and comprising a base and a spring arm connected to the base, the base is arranged on the pushing seat, the spring arm is in contact with the moving spring mechanism, the base comprises a fixed part and a protruding structure connected between the fixed part and the spring arm, the fixed part is connected to the pushing seat, the protruding structure protrudes towards the side of the pushing seat relative to the fixed part, and the side surface of the protruding structure away from the spring arm is in abutment with the pushing seat. The high-voltage direct-current relay can reduce stress at the abutment position of the protruding structure and the pushing seat, reduce the risk of damage or separation of the fixed part from the pushing seat caused by the stress conduction to the fixed part and the arching deformation of the fixed part, and is beneficial to improving the structural reliability of the high-voltage direct-current relay.

This utility model discloses a spiral-grooved vibration-damping tapered shank cutting tool, relating to the technical field of BT-type tapered shank cutting tools. Specifically, it is a spiral-grooved vibration-damping tapered shank cutting tool, comprising a flange and a BT-type tapered shank. The surface of the BT-type tapered shank is provided with spiral grooves, which are filled with elastic damping material. This spiral-grooved vibration-damping tapered shank cutting tool, by designing spiral grooves in the BT-type tapered shank and filling them with elastic damping material, utilizes the multi-head spiral structure of the spiral grooves to disperse vibration energy in multiple directions. At the same time, the elastic damping material absorbs high-frequency vibrations through shear deformation. This "rigid-flexible composite" structural design solves the contradiction between vibration suppression and structural strength in BT-type tapered shank cutting tools, and also provides high structural reliability without affecting the original strength of the BT-type tapered shank. It offers a BT-type tapered shank cutting tool that combines high rigidity, good vibration reduction performance, and low manufacturing cost.

The application discloses a kind of adiabatic sealed storage tank and its installation method, storage tank includes tank wall and insulation box, gap, it further includes elastic anti-convection element, and limiting plug-in column;Installation method, by prior accurate positioning and fixed limiting column, then connect anti-convection element, finally utilize the mechanical limit of structure self and complete the blind pressure assembly of insulation box, the way of process, originally height dependent on the experience of construction personnel is converted into standard action by mechanical dimension control;The application relies on the side of insulation box close to tank wall directly to elastic anti-convection element exert normal compressive force, force elastic anti-convection element to produce transverse expansion deformation and extrude into the gap between adjacent insulation box inside;Not only realize the dense physical plugging of bottom gap, cut off the convection channel of gas flow, reduce thermal siphon effect, also simplify assembly alignment process by the cooperation of structure, enhance the overall thermal insulation sealing performance and structural reliability of enclosure system.

The utility model belongs to the technical field of fireproof cables, and particularly relates to an elastomer composite fireproof cable for urban fire protection, which comprises a plurality of cable cores spliced into an inner core, the plurality of cable cores are distributed in a circumferential manner and are externally cylindrical, an insulating layer is arranged outside the cable cores, an inner armor layer is wrapped outside the insulating layer, and an outer armor layer is wrapped outside the inner armor layer. The outer part of the inner armor layer is wrapped with an inner buffer sheet; according to the utility model, through arranging the inner buffer sheets and the outer buffer sheets which are distributed circumferentially outside the inner armor layer, the buffer effect when the cable is pressed is realized through the interaction of the buffer grooves, the buffer ribs and the energy absorption grooves, and meanwhile, the buffer ribs which are arranged at intervals provide a moving space for bending of the cable, so that both buffer protection and flexibility are taken into consideration; besides, the inner buffer sheet, the inner armor layer and the outer buffer sheet are spliced in a staggered manner, so that the outer buffer sheet plays a role in limiting the inner buffer sheet, and the outer armor layer, the fireproof shielding layer and the outer surface layer are combined to form a complete and closed cable structure, so that the production convenience is improved, and the structural reliability is ensured.

The invention provides a power transmission line risk assessment method and system integrating structure reliability and analytic hierarchy process, and belongs to the technical field of power system safety and disaster prevention. The overall risk level of the power transmission line section in a specific disaster scene is determined through data preparation and evaluation system construction, standard tower type mechanical property calibration, parameterized load effect calculation, mechanical failure probability calculation, electrical risk index evaluation, heterogeneous index normalization fusion and comprehensive risk index aggregation. According to the method, accurate and efficient component-level reliability evaluation can be carried out on a large-scale line, key shortages in an evaluation system are solved, the evaluation system is more complete and closer to engineering practice, the scientificity and rationality of a final evaluation result are ensured, and the evaluation efficiency is improved. And decision support is provided for differentiated operation and maintenance, precise investment and disaster prevention and reduction of the power grid.

The application discloses a bionic variable stiffness interlocking structure suitable for a planetary lander and a preparation method, and relates to the technical field of deep space exploration. The bionic variable stiffness interlocking structure of the application reserves a gap, an auxiliary rib or a cylinder as a weak end, the weak part is preferentially dissipated damage under load, and the overall secondary stiffness change is realized through truss fitting and locking and compression. The application adopts a partition functional arrangement, uses a martensite dominant nickel-titanium alloy lattice support in a landing impact energy absorption part, relies on martensite reorientation to realize efficient energy dissipation, low residual strain and shape recovery, uses an austenite dominant nickel-titanium alloy lattice support in a main load bearing core area, and uses the high modulus and buckling resistance characteristics to guarantee the structure stiffness and stability. Through the collaborative combination of the two types of alloy units, the load bearing, buffering and adaptive variable stiffness integration are realized, the planetary landing process multi-load coupling working condition requirements can be effectively met, and the structural reliability and buffering performance of the lander under deep space extreme environment are improved.

The invention discloses a double-steel-wheel road roller integrated frame reliability bench test control method, which belongs to the technical field of double-steel-wheel road roller frame testing, and comprises the following steps: obtaining analogue simulation load data under a double-large vibration working condition based on analogue simulation calculation; inputting a set load spectrum program into a control system of the electro-hydraulic servo actuator so as to apply a cyclic load spectrum to the integrated frame; gradually lifting the cyclic load spectrum to a target load level, recording a dynamic strain time history, a displacement change and an acceleration response of a key measuring point in the endurance test process, and performing online damage monitoring to obtain a periodic damage detection record; and finally evaluating the fatigue damage, the durability limit and the structural reliability of the integrated frame by combining a fatigue damage accumulation theory. The method is good in universality and adaptability, can simulate the frame vibration load spectrum based on the cooperation of the front / rear double actuators and the single shaft, reproduces the vibration compaction working conditions of the front and rear double steel wheels of the road roller in the time domain, and achieves process prediction and optimization.

The invention discloses a stability control method for modular construction of an offshore booster station, and belongs to the technical field of offshore wind power engineering. The method comprises the following steps: realizing stability preposition control of submodule division based on a principle of function division, weight adaptation and gravity center controllability; a high-precision supporting and connecting system is constructed, and the positioning precision and the structural stability of the submodules in the prefabrication and assembly stage are guaranteed through adjustable supporting structure design and standardized interface configuration; the assembly process and precision control are standardized, nondestructive testing and laser positioning are combined, and stability management and control of sub-module splicing and module forming are achieved; the monitoring system monitors the construction process in real time and dynamically adjusts the construction process, assembly deviation is corrected in time through sensor monitoring and mechanical verification, and the overall stability of the block is ensured. Stability risks such as center-of-gravity shift, interface deviation and stress concentration in the construction stage are avoided from the source, the block construction precision and the structural reliability are improved, and a solid foundation is laid for subsequent transportation and offshore installation.

The application discloses a microcomputer-controlled electro-hydraulic servo bridge expansion device testing machine, which comprises a base, a detection platform and a detection device. The base is provided with transverse sliding rails, longitudinal sliding rails and at least two groups of movable gantries. The detection platform comprises a first platform and a second platform. The first platform is provided with a vertical misalignment cylinder between the first platform and the transverse sliding rails. The second platform is provided with a misalignment turntable rail between the second platform and the longitudinal sliding rails. The detection device comprises transverse detection devices, longitudinal detection devices and vertical detection devices. The transverse detection devices can exert a transverse load on the first platform. At least two longitudinal loading cylinders of the longitudinal detection devices can independently exert a longitudinal load on the second platform. A plurality of vertical loading cylinders of the vertical detection devices can independently exert a vertical load on different parts of the bridge expansion device. The application can simulate longitudinal inclination, vertical inclination, transverse misalignment and multi-directional composite deformation conditions, and comprehensively detect the sealing performance, fatigue life and structural reliability of the bridge expansion device.

The application discloses a downhole tool structure reliability judgment method based on real-time working conditions and belongs to the technical field of oil drilling, and comprises the following steps: S1, acquiring a downhole load working condition time sequence table and recording a downhole tool structure load change curve; S2, sampling downhole tool structure parts that have failed, and establishing a downhole tool structure load change sample library before failure occurs; S3, comparing samples before failure of the same downhole tool structure through time sequence curve similarity, extracting multi-factor coupling load change characteristics before failure of the downhole tool structure, determining a failure identification threshold of the downhole tool structure, and judging downhole tool structure reliability. The application can accurately and timely warn downhole tool failure by recording cumulative load of the downhole tool structure failure through the downhole load working condition time sequence table, reduce the downhole tool failure probability of ultra-deep wells, and comprehensively improve the safety and reliability of drilling engineering.

The present application relates to a kind of spot I type nugget fracture failure constitutive model construction method, belong to the fracture mechanics and numerical simulation method technical field of spot welding joint.The technical scheme of the present application is: the parameter construction of constitutive model is carried out, parameter is directly used for spot welding joint related finite element simulation;Spot welding joint is bonded with uniaxial tensile fixture, and the tensile experiment of nugget fracture form is completed under tensile testing machine and the load-displacement curve and maximum load are recorded;Finite element model is constructed and tensile displacement is calculated;Convert and correct stress-displacement curve in combination with measured nugget area, solve maximum tensile stress and fracture energy, parameter is substituted into model and the precision of replacement connection mode is verified.The beneficial effects of the present application are: the accurate construction of spot I type nugget fracture failure constitutive model is realized, which provides standardized mechanical parameter support for spot welding joint structure reliability design and welding process optimization, and significantly improves the accuracy and engineering application value of finite element simulation.

The invention discloses a pressurizing building based on assembly type unit curtain walls and a construction method thereof. The construction method comprises the steps that a plurality of curtain walls are prefabricated, hanging pieces are installed on the inner surfaces of the unit curtain walls, bellmouths are formed in the tops of the unit curtain walls, and inserting pieces are arranged at the bottoms of the unit curtain walls; mounting a main body frame, and mounting a hanging seat on the outer surface of the main body frame; positioning steel pipes are installed, the unit curtain walls are installed above the positioning steel pipes, the hanging pieces are correspondingly hung on the hanging seats, after the positions of the unit curtain walls are finely adjusted, the inserting pieces of the unit curtain walls on the upper portion are correspondingly inserted into the bell mouths of the adjacent unit curtain walls on the lower portion, and then the hanging pieces are locked on the hanging seats; gaps between the unit curtain walls are sealed to form a curtain wall system; and roof panels are installed to obtain the pressurized building. The obtained supercharged building has excellent thermotechnical and airtight performance, extremely high structural reliability and durability and good construction adaptability and economical efficiency, and the mounting adaptability of the unit curtain wall is greatly improved through cooperation of a hanging mode and a socket mode.

This invention relates to a small, four-wheeled inspection robot. The robot comprises a main body assembled from several modular supports, which are connected by quick-release mechanisms. Multiple five-bar linkages are distributed beneath the main body, with drive wheel assemblies mounted at the central hinge point of each linkage. Each five-bar linkage includes two thigh supports and two lower leg supports driven by servo motors, with the thigh and lower leg supports hinged to each other via a knee joint mechanism integrating a composite bearing. Both the main body and the linkage assemblies are made of lightweight, high-strength materials. This invention aims to improve the robot's terrain adaptability, structural reliability, and on-site maintenance efficiency in complex working conditions through the synergistic cooperation of the five-bar linkage wheel-leg topology and the modular quick-release body.

The invention belongs to the field of aerospace engineering, and particularly relates to a wing body connecting structure and method. The wing body connecting structure comprises a connector and a plurality of one-way belts; the connector comprises a connecting end and an embedding end, the connecting end is connected with the canard cross beam, the wing cross beam or the empennage cross beam, the embedding end is embedded into the fuselage skin, and a transverse through groove is formed in the embedding end; the one-way belts penetrate through the through grooves, and the two ends of each one-way belt are bonded to the inner surface and the outer surface of the fuselage skin respectively and extend to the bottom of the fuselage. The mode that the connector is matched with the one-way belt is adopted, so that the load of the fuselage is effectively transmitted to the connector through the one-way belt, the problem that the bonding performance of the connector and the skin is poor is solved, the lift load of the wing is borne, and the structural reliability is high; the whole structure is few in component, simple and clear in force transmission path and light in weight, and the manufacturing cost and the assembling difficulty of parts are effectively reduced.

This application relates to a pressure-reducing inlet valve and a bathroom fixture. The pressure-reducing inlet valve includes a valve body and a pressure-reducing mechanism. The valve body has an inlet channel and an outlet channel communicating with the inlet channel. The pressure-reducing mechanism is disposed within the inlet channel and includes a flow-limiting structure and a pressure-reducing structure. The flow-limiting structure is disposed on the inlet side of the pressure-reducing structure. Water flows through the inlet channel between the flow-limiting structure and the pressure-reducing structure. The pressure-reducing structure is configured to move towards the flow-limiting structure when the water pressure in the inlet channel increases. The aforementioned pressure-reducing inlet valve reduces the water flow rate and water pressure through the pressure-reducing mechanism, thereby reducing the impact of water flow on the outlet components of the pressure-reducing mechanism and improving the service life and structural reliability of the pressure-reducing inlet valve.

The invention discloses a bypass operation drainage wire rapid lap joint tool structure force field analysis method, system and device and a medium, and belongs to the technical field of electrical tool design, and the method comprises the steps: automatically generating a tool geometric model through adaptive multi-resolution three-dimensional modeling, and carrying out local encryption of a grid for a mechanical key area; then integrating a multi-target material performance evaluation algorithm to realize material optimization, and applying a multi-physics coupling load based on a high-fidelity load modeling method; a high-risk area is dynamically corrected through a structure-interface self-correction stress simulation model, and a simulation drive design mechanism is introduced for iterative optimization until the overall performance is optimal; and verifying and solidifying the structure scheme through an extreme working condition inversion test. According to the method, the analysis and prediction precision of the tool under complex working conditions is improved through adaptive multi-resolution modeling and multi-physics field coupling simulation; and in combination with an evolutionary iterative optimization mechanism, collaborative spanning of mechanical, electrical and corrosion-resistant properties is realized, and the structural reliability is enhanced.

The invention discloses a heat storage lava solid particulate matter with good thermal stability and a preparation method thereof, and belongs to the technical field of energy storage materials, the heat storage lava solid particulate matter comprises 68%-73% of SiO2, 2.5%-3.5% of SiC, 11%-14% of Al2O3, 4%-6% of MgO, 2%-3% of Fe2O3, 2%-3% of MnO2, 1.5%-2.5% of TiO2, 2%-3% of ZrO2, 1.5%-2% of La2O3 and 1%-1.5% of ZrSiO4. According to the heat storage lava solid particulate matter with the good heat stability and the preparation method thereof, by means of raw material synergy, process optimization and surface strengthening, the comprehensive advantages of being excellent in high-temperature stability, good in heat storage-heat conduction performance balance, high in mechanical and structural reliability and resistant to corrosion are achieved; the long-term stable service requirement of the high-temperature heat storage system can be met; and the operation and maintenance cost is reduced.

The invention provides a modularized steel box girder butt joint structure of an ultra-wide steel bridge deck, and relates to the technical field of bridge engineering, the modularized steel box girder butt joint structure comprises a steel box girder module, a stretching butt joint frame is welded to the right edge in the steel box girder module, a centering adjusting frame is welded to the left edge in the steel box girder module, and four stretching guide ports are formed in the right end face of the stretching butt joint frame in a penetrating mode; horizontal pulling plates are slidably connected to the interiors of the four stretching guide ports, the four horizontal pulling plates are fixedly connected through a pulling plate middle frame of a cross-shaped structure, a pulling plate lead screw is fixedly connected to the center of the left surface of the pulling plate middle frame, a temporary rigid connecting system is formed in a butt joint face area, and the stability of a to-be-welded connector is greatly improved; displacement caused by construction vibration, wind load or temporary supporting deformation is effectively restrained, it is ensured that the position relation between the box girders in the welding process is kept unchanged, and therefore the welding seam quality and the structural reliability are improved, and the problem of box girder butt joint deviation caused by environment disturbance and unstable supporting in traditional construction is effectively solved.