696 results about "Structural stability" patented technology

The invention discloses an equipment health state dynamic prediction method fusing digital twinning and multi-scale evaluation, and relates to the technical field of equipment health prediction of an active launching platform, and the method comprises the steps: laying multiple types of sensors on a mechanical structure layer, a hydraulic execution layer, an electric control layer and an environmental action layer of the active launching platform; multi-source operation data such as stress strain, pressure torque, temperature power and environment load are collected in real time, and a standardized input parameter set is formed; and constructing a multi-layer digital twinborn model, forming a multi-scale twinborn mapping matrix, calculating a healthy coupling evolution coefficient, and evaluating the stability of the multi-layer collaborative structure of the platform. Calculating a multi-scale stability coefficient, and updating the multi-scale twin mapping matrix; and calculating a dynamic prediction driving index to realize prediction reliability judgment and digital twin model self-learning updating. And a health prediction closed loop of digital twinning and physical equipment is realized.

The invention discloses an efficient preparation and construction optimization system and method for a cold patch asphalt mixture, and belongs to the technical field of construction optimization. Environmental parameters of a construction site are collected, including altitude, an air pressure correction coefficient and a light volatile factor, and a multi-scale mixture model coupled with air pressure response is constructed; analyzing the volatilization path, the structural stability and the initial bonding strength of the mixture in combination with discrete elements and fluid mechanics simulation, and further extracting a structural retention threshold value and reversely deducing the proportion adjustment amount of medium-high boiling point solvent components; meanwhile, a microcapsule controlled release technology is adopted to delay release of light components, adaptive construction parameters are output based on a simulation platform and a machine learning model, the paving temperature and the compaction frequency are dynamically optimized, and efficient cooperation and intelligent regulation and control of the cold patch material performance and the site construction technology are achieved.

The invention belongs to the technical field of gear precision machining, and particularly relates to a high-precision machining method for a complex curved surface gear, which comprises the following steps: acquiring a gear three-dimensional model and planning an initial machining path; tooth profile errors are predicted based on the path, and real-time dynamic compensation is conducted in the machining process; predicting a heat treatment deformation trend based on the compensated motion trail and the real-time data; adjusting heat treatment process parameters according to the predicted deformation trend; and detecting the final state of the gear after heat treatment, and updating the error prediction and compensation model according to a detection result. According to the method, real-time error compensation in the machining process is associated with predictive control of heat treatment deformation to form a closed loop, the problem that in the prior art, machining precision and structural stability after heat treatment are difficult to cooperatively guarantee is solved, and high-precision and high-reliability unified manufacturing of the complex curved surface gear is achieved.

The invention relates to the technical field of construction engineering quality safety management, and discloses a quality safety control and engineering cost correlation analysis early warning method based on big data. The method comprises the following steps: acquiring concrete strength and reinforcement protective layer thickness data through a sensor, and generating an original data set by combining manual measurement and verification; identifying a factor group associated with the structural stability and the corrosion risk through standardization processing and clustering analysis; predicting potential rework cost by using a neural network model, and calculating a risk influence score; dynamically adjusting a quality safety factor weight according to a construction stage, and optimizing a comprehensive index in combination with a project type; and generating a real-time cost risk early warning signal and determining an early warning level by extracting trend change of the optimization index and adopting threshold comparison. According to the method, the multi-source data is fused, the weight is dynamically adjusted, quantitative linkage and dynamic early warning of the construction quality and the construction cost risk are achieved, the accuracy and the real-time performance of construction quality monitoring are improved, and the construction cost risk is effectively reduced.

The invention relates to the technical field of engineering monitoring, in particular to a large-tonnage pre-stressed anchor cable tensioning quality intelligent evaluation system which comprises a time sequence construction module, a track recognition module, a stability recognition module, a coordination analysis module and a quality evaluation module. According to the method, the trend direction and rate conjoint analysis is carried out on multiple types of response parameters in the anchor cable tensioning process, the response synchronism characteristics in the tensioning period and in the cross-period can be accurately recognized, the anchor cable response track with a time sequence structure is constructed on the basis, accurate recognition of the lag phenomenon and the trend closing relation is achieved, and the accuracy of the anchor cable tensioning process is improved. The method further extracts the dynamic correlation characteristics between the structural disturbance and the tensioning segments, enhances the substantive identification capability of the structural stability risk by means of the time domain coincidence analysis of the disturbance duration of the unstable segments and the falling time consumption, and improves the accuracy of the structural stability risk by normalizing the response rates of the segments with the time overlapping relationship. An index system reflecting the overall coordination level can be established in an anchor cable group.

The invention relates to the technical field of powder metallurgy materials, and discloses a binding-phase-free hard alloy and a preparation method thereof.The binding-phase-free hard alloy comprises, by mass, 75-80 parts of WC; 8 to 12 parts of TiC; 5 to 8 parts of TaC; 3 to 5 parts of ZrC; 1.5 to 2.5 parts of HfC; 0.8 to 1.2 parts of rare earth oxide; the preparation method comprises the five key steps of core-shell structure composite powder preparation, high-energy beam melting gradient accumulation, microwave-magnetic field composite field activation, multi-stage pressure plasma sintering and staged variable-rate gradient cooling. And component gradient design is cooperated with a multi-field coupling process. Through collaborative design of a core-shell structure hard phase and a gradient composite phase, and in combination with a multi-field coupling activated sintering and gradient cooling process, the problem of obdurability balance of the non-binding-phase hard alloy is solved, the microstructure stability is optimized, and the comprehensive performance and the process controllability are improved.

The invention provides a wind tunnel airflow and structure response coupling analysis method, and belongs to the technical field of wind tunnel construction, and the method comprises the steps: installing a multi-sensor array at a wind tunnel test section to obtain a structure response time sequence set, starting a GPU double-layer calculation unit to carry out the fluid mechanics calculation, and obtaining an airflow mass vector matrix; a time domain superposition algorithm is utilized to construct an airflow superposition feature matrix to extract multi-frequency domain response features, an airflow skewness stability matrix is calculated to quantify the asymmetry influence of an airflow field, a structural response stability feature matrix is established to represent structural stability features, and the four feature matrixes are input into a wind tunnel coupling prediction model for training and prediction. The hierarchical fusion weight parameters are dynamically adjusted through the adaptive adjustment function to adapt to different working conditions, a high-precision airflow quality prediction result is finally output, and the technical problems that in a wind tunnel test in the prior art, airflow and structure response coupling analysis precision is low, and calculation efficiency is insufficient are solved.

The invention discloses an automatic aligning and hinging device and method for a whole-section steel truss girder. The device comprises a main cable transverse opposite-pulling system, a monitoring system, a hoisting system, a local aligning auxiliary tool, an adjusting control system, a temporary hinging device and a fine adjusting device. The monitoring system collects data such as spatial positions and attitude angles of the steel truss girder sections in real time and feeds back information to the adjusting control system; the adjusting control system generates a control instruction based on the information, coordinates the hoisting system to adjust the overall posture and position of the steel truss girder, controls the temporary hinge device to realize flexible connection of the upper chord, and controls the fine adjustment device at the lower chord interface to automatically adjust the longitudinal position and the vertical elevation to ensure accurate closure; the local alignment auxiliary tool is used for solving the problem of difficulty in butt joint of individual rod pieces; the main cable transverse opposite-pulling system dynamically adjusts transverse deviation of the main cable, the stable structure in the hoisting process is guaranteed, all the systems work cooperatively, and efficient, safe and full-automatic alignment and hinging of the whole section of steel truss girder are achieved.

The invention relates to the technical field of aircrafts, in particular to a master-slave multi-rotor unmanned aerial vehicle which comprises a control system and a storage battery. The device further comprises a structure assembly. The structural assembly comprises a tetrahedral shell, coaxial reverse dual motors, two main rotors, three branch pipes, three driving mechanisms and three slave rotors. The control system controls operation of the whole, and the storage battery supplies power to the whole. The large-size main rotor is used for replacing a traditional multi-rotor to provide main lifting force, the efficiency can be improved, the energy utilization level can be improved, and meanwhile the loading capacity is higher compared with the multi-rotor; a combined triangle is used as a main structural form, so that the structural stability and reliability under various stress conditions are ensured, and the use is more stable under a complex scene; the flight direction, attitude and stability are controlled by three small-size slave rotors; therefore, the problems that an existing multi-rotor unmanned aerial vehicle is low in energy utilization efficiency and poor in loading capacity are solved.

The invention relates to the technical field of bridge construction engineering, and discloses a prefabricated bridge plate integral tensioning structure which comprises a bridge plate structure and a hydraulic driving device, the bridge plate structure comprises a bridge plate body, a plurality of through holes are formed in the bridge plate body, and the bridge plate body is provided with a plurality of corrugated pipes through the through holes; according to the bridge plate, through the arrangement of a double-liquid space control and limiting baffle structure of the hydraulic driving device, in the springback process after tensioning is completed, the displacement sensor monitors displacement of the steel strands in real time, and when it is detected that the springback distance is abnormal, the steel strands are driven by the hydraulic driving device to move back and forth. The position of the first anchor clamping piece is cooperatively adjusted through the third push rod and the second push rod, it is ensured that the first anchor clamping piece is tightly attached to an anchorage device hole, damage to the interior of a bridge plate due to too high prestress is avoided, potential safety hazards in subsequent use are reduced, and the structural stability is improved.

The invention discloses a flexible riser vibration response characteristic analysis method, and relates to the technical field of ocean engineering. According to the method, a flexible riser vibration model is established based on a vibration theoretical model and a fluid control equation for vibration analysis, a theoretical time domain response curve of the flexible riser is obtained through MATLAB calculation, and then a flexible riser three-dimensional simulation model is established in an ANSYS Workbench integrated simulation platform. According to the method, a flexible riser three-dimensional simulation model is constructed, material constitutive parameters, boundary conditions and load application of the flexible riser three-dimensional simulation model are configured, then simulation is performed in an ANSYS Workbench integrated simulation platform by using the flexible riser three-dimensional simulation model, bidirectional fluid-solid coupling analysis is performed by coupling a Fluent flow field system and a Transient Stratum module, the radial displacement time history of the flexible riser under a preset working condition is obtained, and the radial displacement time history of the flexible riser under the preset working condition is calculated. And extracting resonance characteristics of the flexible riser. According to the method, the vibration response characteristics of the deep-sea flexible riser under the influence of internal and external fluids in the service process are accurately obtained, and a foundation is laid for guiding the structural stability of a deep-sea operation system.

The embodiment of the invention discloses a gear pump shell topological optimization method and device based on an SIMP variable density method and a gear pump shell. The method comprises the steps that a three-dimensional model of the gear pump shell is established; performing statics analysis on the three-dimensional model to obtain stress and deformation distribution under different working conditions; taking the mass minimization of the shell as an objective function, taking stress and deformation distribution as constraint conditions, taking material distribution as a design variable, and adopting an SIMP variable density method to construct a topological optimization model; solving the topological optimization model to obtain optimized material distribution; and performing geometric reconstruction on the three-dimensional model based on the material distribution to obtain a reconstructed three-dimensional model. According to the scheme, material distribution is optimized through the SIMP variable density method, on the premise that the structural strength is guaranteed, the mass of the gear pump shell is greatly reduced, the stress distribution of the optimized shell is more uniform, and the structural stability and deformation resistance of the shell under the high-pressure working condition are remarkably improved.

The present application belongs to the technical field of ceramic alloy flywheel, and particularly relates to a liquid-liquid composite ceramic inlaid high-wear-resistance flywheel and a preparation method thereof, which is suitable for high-strength impact environment such as mines and metallurgy. The flywheel realizes metallurgical bonding of ceramic-metal by step-by-step pouring and temperature control solidification of basalt melt and high-density W-Ni-Fe alloy melt in a specific mold structure. The ceramic core is composed of multiple inorganic oxides and low-melting-point glass powder, and has excellent interface compatibility and structural stability. During the preparation process, the initial setting state of basalt and the alloy flow path are accurately controlled to improve the interface bonding strength and overall density. The finally obtained flywheel has high hardness, high toughness and excellent wear resistance, and significantly prolongs the service life.

The invention discloses a modular self-locking shear wall capable of being rapidly assembled and an assembling method. The shear wall comprises wall body units, a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are arranged between every two adjacent wall body units, and the first connecting piece is used for butt joint and locking between every two adjacent wall body units; the second connecting pieces are used for connecting the two adjacent wall units into a whole under the action of concrete; the fabricated shear wall is reasonable in structural design and high in safety and reliability, rapid and accurate butt joint between the two vertically-adjacent wall body units can be achieved through the first connecting pieces, self-locking connection between the two vertically-adjacent wall body units can also be achieved, and the fabricated shear wall is high in practicability. And concrete is poured between every two adjacent wall body units in the horizontal direction, so that every two adjacent wall body units are fixedly connected under the action of the steel bar rings and the concrete, and the assembling convenience and the structural stability of the shear wall are effectively improved.

The invention relates to the technical field of building construction, in particular to a BIM-based squat silo sliding formwork device and a construction method thereof.The BIM-based squat silo sliding formwork device comprises a door-shaped support, a lifting system, a formwork system and an operation platform system, a horizontal control rod is arranged on the door-shaped support and comprises a fixed section and a control section, and the fixed section is connected with the lifting system; the sliding formwork device comprises a door-shaped support, a fixed section and a control section, the fixed section is connected with a left supporting leg and a right supporting leg of the door-shaped support, the control section vertically extends into a concrete pouring cavity formed by the formwork system, a roller is further arranged on the control section, and the roller abuts against a squat silo wall reinforcement cage. The distance between the steel reinforcement framework and the concrete contact face of the formwork system can be effectively controlled, collision and friction between the formwork system and the steel reinforcement framework are avoided, and therefore the position accuracy and the structural stability of the steel reinforcement framework are guaranteed, and the pouring quality of concrete on the wall of the squat silo is improved.

The invention relates to a cable optimization method and system based on multi-strand insulated wire twisting and thermal management in the field of intelligent manufacturing, and the method comprises the steps: constructing a three-dimensional wire core distribution model according to an optimized twisting parameter set, judging whether the wire core distribution reaches a preset uniform threshold value or not, and obtaining a uniform twisting structure description; if the uniform twisting structure description meets a threshold value, heat conduction related characteristics are extracted from the description, finite element analysis is adopted to simulate heat distribution, and a heat accumulation area is determined; acquiring temperature field data of the insulating material according to the simulation result of the heat accumulation area, and judging whether the temperature field exceeds an aging threshold value or not to obtain a heat dissipation efficiency evaluation index; according to the heat dissipation efficiency evaluation indexes, heat conductivity parameters are adjusted, secondary optimization is conducted on the adjusted parameters through a genetic algorithm, and an enhanced heat dissipation design scheme is obtained; and if the enhanced heat dissipation design scheme meets the structural stability requirement, integrating the scheme with the uniform twisting structure description, and determining a comprehensive cable performance model.

The invention discloses a water conservancy project full life cycle operation and maintenance management method and platform, and relates to the technical field of water conservancy project management.The weir crest water level Hw, the gate flow Qo, the gate opening and closing pressure Pg, the structure dip angle Gq and the iron concentration cFe are accurately collected through a multi-source physical sensing unit; and the sensor type, the arrangement position and the acquisition condition corresponding to each parameter highly accord with the operation characteristics of the water conservancy project, so that the data source is stable, the coverage is wide, and a high-frequency real-time data sensing system is formed. The mechanism breaks through the problem of low credibility of previous parameters, and lays a high-quality data foundation for subsequent operation state modeling and situation map construction. A structural stability correlation function constructed based on a water conservancy physical mechanism is introduced as an evaluation index, sliding window recognition and inversion repair are performed on abnormal fluctuation in original data, and different from a conventional statistical elimination method or an interpolation filling method, reasonable traceability correction can be performed by using a known physical relationship of a system.

The invention relates to the technical field of shield tunnel reinforcement, and particularly discloses a foundation correction unit and a monitoring correction device for shield tunnel segments. The basic correction unit is composed of a duct piece support and a sliding rail base and is fixed to the surface of a duct piece in a lossless mode through a vacuum suction cup. The monitoring and correcting device is formed by connecting a plurality of annular correcting units and / or longitudinal correcting units, and the annular / longitudinal correcting units are formed by connecting basic correcting units and bidirectional force application rods and are integrated with monitoring sensors. The monitoring and correcting device is also provided with an automatic control system which comprises a data acquisition module and a servo module, the data acquisition module acquires monitoring data of the displacement sensor, the angle sensor and the vacuum gauge in real time, the servo module resolves the monitoring data in real time and generates a control instruction, and the suction force of the suction cup and the tension and compression load of the hydraulic oil cylinder are dynamically adjusted. And active correction of duct piece deformation and structural stability control are achieved. The tunnel deformation development can be effectively inhibited while the structural integrity of the duct piece is guaranteed.

The invention discloses a method for increasing the sidewall turn-up height in a building process of an all-steel radial tire, which comprises the following steps of: acquiring multi-source data such as temperature, pressure and angle in a turn-up process through an infrared temperature sensor, a pressure sensor and the like; and constructing a multiple linear regression model, a machine learning model and a hybrid model fused with the physical principle, analyzing the relationship between the process parameters and the anti-package height, and performing verification and optimization. According to model output parameters, a servo motor is used for accurately controlling the downward pressing angle and pressure of a reverse wrapping pressing roller, and production is executed in cooperation with an auxiliary supporting ring and a sectional type reverse wrapping technology; meanwhile, the turn-up height is detected in real time through an intelligent monitoring system, and parameters are automatically adjusted when the turn-up height does not reach the standard. According to the method, precise regulation and control of the tire sidewall turn-up height are achieved, compared with a traditional process, the product percent of pass is increased to 95% or above from 85%, the production efficiency is improved by 20%-30%, the tire structure stability is effectively enhanced, the rolling resistance and the tire burst risk are reduced, and intelligent upgrading of tire manufacturing is promoted.

The invention discloses a fracture prediction method for a stainless steel cable tie, and particularly relates to the technical field of material forming processing, and the method comprises the steps: collecting multi-source original data in the punching forming process of the cable tie, constructing a multi-dimensional production behavior data set associated with a time sequence, and extracting frequency spectrum, deformation, thermal imaging and acoustic emission characteristics to form a fluctuation judgment basis; when a risk threshold condition is met, calculating a crack latent length index and a structure stability index, inputting a trained model, outputting a fracture influence grade, realizing risk prediction and grading processing of the stainless steel cable tie, and ensuring that the stainless steel cable tie is adaptive to different application scenes or high-risk products are eliminated; according to the invention, real-time acquisition and analysis of multi-source data in the ribbon punching process are realized, a fluctuation judgment basis is constructed to dynamically judge the risk, learning model prediction is carried out in combination with the crack latent length index and the structure stability index, the fracture grade is output, ribbon grading processing and accurate application are realized, and the reliability and the intelligent level are improved.

The invention discloses a multi-index railway slope retaining wall stability early warning method based on the Internet of Things, and relates to the technical field of the Internet of Things. Comprising the following steps of data collection, wherein MEMS acceleration sensors are evenly distributed at the top and the bottom of a retaining wall, and the MEMS acceleration sensors are used for sampling to obtain acceleration data; data transmission: uploading the acceleration data to a server; performing data processing on the acceleration data by using a built-in algorithm of the server to obtain a velocity amplitude ratio, an inherent frequency and an attenuation constant; and in combination with the velocity amplitude ratio, the first threshold value and the second threshold value of the attenuation constant and the inherent frequency, the stability of the retaining wall is evaluated and early warned based on the results. According to the method, various dynamic indexes such as the velocity amplitude ratio, the inherent frequency and the attenuation constant are comprehensively considered, the recognition precision and integrity of the structural stability change are remarkably improved, risk omission caused by parameter weighting imbalance is avoided, and the robustness of an evaluation system and the timeliness of field intervention are ensured.

The invention provides a jacket type offshore electrical platform optimization method based on a sequential quadratic programming algorithm. The jacket type offshore electrical platform optimization method comprises the following steps: S1, establishing a parameterized offshore electrical platform structure analysis model; s2, calculating an environmental load borne by the offshore electrical platform by adopting an equivalent static load method; s3, establishing an offshore electrical platform optimization model which comprises a target function and a constraint function; s4, performing optimization design by adopting a sequential quadratic specification algorithm; and S5, performing dynamic analysis on the optimal structure, judging whether the optimal structure meets a constraint condition or not under a dynamic load working condition, if so, ending optimization, and if not, manually adjusting the size of the component which does not meet the constraint until the constraint condition is met. According to the method, the sequential quadratic programming algorithm is adopted, the optimization efficiency is high, the engineering optimization requirement is met, the size optimization of the offshore structure considering the pile-soil interaction under wind, wave and flow loading can be achieved, and the cost is further reduced on the premise that the structural stability and safety are guaranteed.

The invention belongs to the technical field of dynamic simulation, and discloses a construction method of a molecular dynamic model for different bubble contents of ice and methane hydrate, and the method comprises the following specific steps: 1, selecting a crystal structure of the ice and methane hydrate as a model basis for initial structure construction; by constructing a molecular dynamic model of an ice and methane hydrate coexistence system, the problem of extensive quantitative regulation and control of bubble content is solved, accurate association of microscopic molecule removal and macroscopic volume fraction is realized, force field parameter suitability of a cross-phase interface is optimized, interaction of a hydrogen bond network and molecules at an ice and methane hydrate interface is accurately described, and the method has the advantages of simple operation and low cost. The simulation precision of the molecular diffusion behavior and the structural stability of the interface area is improved, meanwhile, the bubble form diversity and the temperature and pressure coupling environment are comprehensively considered, a multi-dimensional experimental verification system is established, and the influences of different bubble contents on the thermodynamic property, the dynamic behavior and the mechanical property of the system can be systematically evaluated.

The invention provides a performance prediction method for a hafnium oxide semiconductor material structure, and relates to the technical field of semiconductor material research and development. The method comprises the following steps: performing global search in an Hf-O binary system by using crystal structure prediction software, determining the most stable two-dimensional Hf2O4 crystal structure, and further confirming the crystal configuration through structure optimization; calculating an Hf2O4 crystal structure by using density functional theory calculation software, and evaluating the dynamic, thermodynamic and mechanical stability of Hf2O4 by using a calculation result system; the electronic property of the Hf2O4 is obtained through further deep calculation, and the structural stability and semiconductor characteristics of the Hf2O4 are verified. According to the invention, through the first principle and the evolutionary algorithm calculation, the simulation calculation is used to replace the traditional trial-and-error experiment, and the novel semiconductor material with high reliability can be efficiently explored; a theoretical basis is provided for the design of a novel high-performance semiconductor material in advanced chip manufacturing, the research and development period can be expected to be remarkably shortened, and the cost can be reduced.

The invention relates to the related technical field of angle steel welding, in particular to an angle steel tower angle steel machining automatic welding machine which comprises a welding base and a welding gun head for welding L-shaped angle steel, and an inclination angle adjusting assembly is arranged in the welding base and used for adjusting the inclination angle between the welding gun head and a welding seam. An arc-shaped movable block arranged in the inclination angle adjusting assembly drives a welding piece to conduct angle adjustment in the vertical direction, the inclination angle adjusting assembly comprises a driving rod, an arc-shaped driving plate and an arc-shaped driving block, and a rotating twisting assembly is arranged on the driving rod. High-resolution adjustment of the angle of the rotating disc is achieved through the rotating twisting assembly, the accuracy of welding alignment is guaranteed, flexible adjustment of the inclination angle is achieved through the inclination angle adjusting assembly, the welding gun head is aligned in the best posture, and continuous and seamless welding of the side edge of the L-shaped angle steel is achieved through the concentric-square-shaped surrounding assembly.

The invention relates to the technical field of structural engineering, in particular to a stable friction damper with segmented positive and negative stiffness characteristics and a modeling method of the friction damper. The friction damper comprises supports, and a pre-compression spring assembly, a lever assembly, a viscoelastic damper assembly and a rotating friction assembly which are arranged between the supports; the pre-compression spring assembly is used for achieving the negative stiffness effect, the lever assembly plays a role in increasing the force and the negative stiffness effect, and the pre-compression spring assembly and the lever assembly form a stable triangular deformation structure. The rotating friction assembly is used for providing friction damping force and guaranteeing the stability of the structure when the pre-compression spring assembly and the lever assembly rotate relatively. The viscoelastic damper assembly is used for applying vibration reduction control force to the structure when small-amplitude vibration of the structure is not enough to drive the friction surface to slide. The invention further provides a corresponding modeling analysis method, and the dynamic behaviors of the device in different working stages are accurately described.

The utility model discloses a storage tank structure, which relates to the technical field of rocket storage tanks and comprises a storage tank middle cylinder, an upper seal head and a lower seal head. Each of the upper and lower sealing heads comprises a sealing head light plate and a sealing head bracket; the support is arranged in the storage box, so that the structural stability and the bearing capacity of the storage box are enhanced; the support vertical beams are parallel to the axis of the storage box middle cylinder, so that the stress distribution of the storage box under stress is optimized, local stress concentration is reduced, and the durability and reliability of the storage box are improved; due to the uniform division and through seam design of the support ring beam and the hinging mode of the ring beam fixing plates, the manufacturing process is simplified, the manufacturing efficiency is improved, and meanwhile the multiple layers of ring beam positioning blocks which are annularly arranged are beneficial to improving the assembling accuracy and reliability; the design that the detection sensors are fixedly installed on the middle cylinder support and the end socket support enables detection and maintenance of the storage box to be more convenient, the state of the storage box can be monitored in real time, and safe operation of the storage box is guaranteed.

The invention provides a nuclear power generator compactness test method. The nuclear power generator compactness test method comprises the following steps: S1, cleaning; and the to-be-detected product is comprehensively cleaned. S2, preparation before measurement; and the end socket and the cover plate are assembled to ensure that the product forms a sealed cavity. And S3, carrying out an airtight test. And S4, preliminary inspection. And S5, carrying out a hydrostatic test. And S6, performing secondary inspection. And S7, reducing the pressure. And S8, dismounting the end socket and the cover plate, and completing the detection. By combining the airtight test and the hydrostatic test, the compactness of the nuclear power generator can be comprehensively detected, a detection blind area possibly existing in a single test method is effectively avoided, a special pressure boosting and reducing mode is adopted for hydraulic pressure detection, the accuracy and reliability of a test result are guaranteed, welding residual stress can be effectively eliminated, and the reliability of the nuclear power generator is improved. And the sealing performance and the structural stability of a nuclear power generator product are obviously improved.

The invention discloses a construction system suitable for a partition wall in a double-arch tunnel, the construction system comprises a guide rail assembly, a guide rail supporting assembly and a roller assembly, the guide rail assembly is installed at a set position of an arch wall and is reinforced through the guide rail supporting assembly, and during use, a formwork trolley is in sliding fit with the guide rail assembly through the roller assembly; the concrete is poured to the position between the adjacent steel formworks installed on the formwork trolley; the structure that the guide rail assembly used for sliding of the formwork trolley is arranged on the arch wall is adopted, the problem that the construction precision is insufficient due to reference deviation and unstable supporting in a traditional technology can be solved, potential quality hazards of follow-up main tunnel construction are eliminated, and the safety and structural stability of mid-partition wall construction are enhanced; and meanwhile, the operation process is simplified, the labor cost and the material cost are reduced, and the construction efficiency is improved on the basis that it is guaranteed that the construction quality is accurate and controllable.

The invention discloses an inflatable returner structure safety analysis method and system considering a thermo-pneumatic elastic effect, and the method comprises the steps: building a structural dynamics sub-model, a fluid domain calculation sub-model and a structural thermodynamics sub-model of an inflatable returner, and comprehensively considering the structural thermal deformation caused by aerodynamic heat and the thermal expansion effect of an internally inflated gas; and a bidirectional coupling relationship among aerodynamic force, aerodynamic heat, structural deformation, temperature and internal charging pressure is constructed through the feedback effect of structural deformation on a flow field and an aerodynamic load. And carrying out multi-physics field simultaneous solution by adopting a time step propulsion method, and finally realizing comprehensive safety evaluation of the temperature, stress and deformation characteristics of the structure. According to the method, aerodynamic load distribution, temperature field change, stress response and vibration characteristics of the inflatable returner in the reentry process can be accurately predicted, so that the thermal protection performance and structural safety of the inflatable returner are comprehensively evaluated, and reliable analysis means and engineering basis are provided for optimization design and structural stability improvement of a thermal protection system.