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128 results about "Force analysis" patented technology

Force Analysis delivers that information, through a strong tradition in military analysis and intelligence methodology. Unrivaled Data. Force Analysis provides details and understanding of active armed conflicts based on persistently generated structured data.

Stress analysis method for bridge incremental launching construction

The invention discloses a stress analysis method for bridge incremental launching construction, and particularly relates to the field of stress analysis. According to the method, a mechanical state matrix is generated by combining wavelet noise reduction and Kalman filtering through distributed optical fibers, a piezoelectric force sensor, a vibrating wire stress meter and other equipment and real-time data; a pushing system-temporary support-beam body coupling dynamic mechanical model is established, and a generalized alpha method is adopted for solving and Bayesian optimization calibration parameters are adopted; key parameters are identified on line through a three-level progressive framework, boundary conditions are dynamically updated in combination with a total station and a laser tracker, and supporting rigidity self-adaptive adjustment is achieved through fuzzy PID control. Model confidence evaluation adopts a residual norm-modal confidence criterion-Bayesian update three-level mechanism, finally, stress distribution, support reaction and displacement deviation are calculated based on a correction model, and a safety index, threshold alarm and risk analysis report is generated through a fuzzy comprehensive evaluation method and fed back to a construction control center in real time.
Owner:ANHUI PROVINCIAL HIGHWAY ENG CONSTR SUPERVISION CO LTD

Probe card simulation method and system based on counter-acting force analysis

The invention discloses a probe card simulation method and system based on counter-acting force analysis, which are used in the field of wafer simulation test, and the probe card simulation method comprises the following steps: integrating multiple physical field working conditions to construct a probe card geometric model, and importing the probe card geometric model into finite element simulation analysis software; carrying out grid division on the geometric model of the probe card by utilizing the hybrid voxel tree model, adjusting the grid density according to the distribution requirement of the multi-physical field, and setting a simulation boundary condition by utilizing a preset boundary condition template according to the actual simulation requirement; starting a simulation calculation process based on the adjusted grid density and simulated boundary conditions; and providing a visual interface of physical field distribution and a structural stress state in the simulation calculation process, and performing iterative optimization on the performance of the probe card in the simulation process according to a reactive force distribution result. According to the method, the grid density is automatically adjusted to adapt to changes of a physical field, and it is ensured that higher simulation precision is obtained in a key area.
Owner:DGT SEMICON TECH (JIANGSU) CO LTD

Early warning decision-making method and system for cross-fault water inrush catastrophe of subsea tunnel

The invention belongs to the technical field related to tunnels, and provides a subsea tunnel cross-fault water inrush catastrophe early warning decision-making method and system in order to solve the problems of inaccurate water inrush recognition, lack of interpretability and the like when an existing subsea tunnel passes through a fault zone high-risk scene. Full-process response control from weighting, prediction to explanation of the input features is realized; driving force analysis is carried out by adopting an interpretable model, so that a transparent and credible risk assessment result is provided; and by combining key driving force in the multi-source heterogeneous data and through numerical simulation of the water inrush catastrophe condition, real-time identification and early warning of the tunnel water inrush risk are comprehensively realized, the identification accuracy of the water inrush risk in the tunnel construction process and the completeness of an early warning mechanism are effectively improved, and the method has important engineering application value.
Owner:SHANDONG UNIV

Building block assembly specification generation method based on dynamic stress and related equipment

The invention discloses a building block assembly specification generation method based on dynamic stress and related equipment. According to the method, data is extracted based on images of building block components, dynamic stress characteristics are calculated and coded in a partitioned mode, a stress transmission relation is determined, key nodes are identified, an assembly step sequence is decomposed according to the key nodes, and finally an assembly specification considering dynamic stress is generated. According to the method, geometric and connection information of building block components is extracted, and dynamic stress characteristics and a transmission relation of the building block components are further calculated and analyzed, so that key stress nodes which are crucial to structural stability are identified. On the basis of the key nodes, the splicing process is decomposed into a step sequence considering stress balance, so that a splicing instruction containing stress analysis is generated, the stability of components in the building block splicing process is improved, professional splicing guidance containing dynamic stress information is provided for a user, and the building block splicing efficiency and success rate are effectively improved.
Owner:BEIJING COINCIDENCE TENON & TENON CULTURE TECH CO LTD

Building support structure stress analysis method and system based on BIM, electronic equipment and storage medium

The invention belongs to the field of building structure analysis, and discloses a BIM-based building support structure stress analysis method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining design data of a support structure, and generating a three-dimensional initial model containing geometric features, physical attributes and boundary conditions through a BIM technology; extracting material characteristics and environmental action data from the three-dimensional initial model, and integrating physical attributes and boundary conditions through a finite element analysis method to obtain a stress calculation model; according to the stress calculation model, performing stress-strain analysis on the model by adopting a finite element analysis method, and updating the stress calculation model to obtain a unified model; and calculating stress distribution of the supporting structure of the unified model through a simulation analysis algorithm to obtain preliminary stress result data, extracting a deviation value from the stress result data, and if the deviation value is greater than a preset threshold value, recalculating by adjusting parameters of the unified model until the deviation value is less than the preset threshold value to obtain a final stress analysis result.
Owner:SOUTHWEAT UNIV OF SCI & TECH

Regional ecological hydrological function space-time evaluation and restoring force early warning method and system

The invention discloses a method and system for space-time evaluation and restoring force early warning of a regional ecological hydrological function, and belongs to the technical field of ecological hydrology and environment monitoring and management, and the method comprises the steps: obtaining a multi-source index capable of sustainably diagnosing the ecological hydrological function; performing standardization processing on the multi-source indexes by adopting a global space-time threshold method; performing comprehensive evaluation on the standardized index data by adopting a combined weighting method and a nonlinear comprehensive model to obtain a comprehensive index; based on the comprehensive index or the multi-source index, dynamic early warning of the regional ecological hydrological function stability is carried out by adopting a critical moderation theory; and performing spatial clustering according to the comprehensive index, and performing driving force attribution analysis on the functional evolution of each clustering region to generate a spatial differentiated collaborative recovery path. The method solves the problems that a traditional evaluation method neglects quality, lacks space-time comparability and cannot carry out dynamic early warning and precise countermeasure, and has the remarkable advantages of being more scientific in evaluation, more reliable in result, and capable of carrying out early warning and countermeasure.
Owner:NINGXIA UNIVERSITY

SPCS prefabricated part bearing capacity analysis system

The invention relates to a bearing capacity analysis system of an SPCS prefabricated part. The method comprises the following steps: acquiring stress distribution diagrams of an SPCS prefabricated part under various different load conditions, and introducing an image processing algorithm based on artificial intelligence and deep learning at a rear end to analyze the stress distribution diagrams, so as to automatically identify and quantify stress distribution characteristics of the prefabricated part under different load conditions; therefore, the structural strength of the SPCS prefabricated part, such as a cavity prefabricated wall, is evaluated, so that a result whether the prefabricated part meets a preset design standard or not can be quickly obtained, and in this way, the intelligent degree of bearing force analysis of the SPCS prefabricated part is improved, comprehensive automatic evaluation of the prefabricated part is achieved, and the working efficiency of the SPCS prefabricated part is improved. And reliable data support is provided for building design and construction processes.
Owner:ZHONGZI HONGYE ENG CONSULTING CO LTD

System and method for analyzing current-carrying capacity of copper-aluminum transition temporary drainage wire clamp

The invention discloses a current-carrying capacity analysis system and method for a copper-aluminum transition temporary drainage wire clamp, and relates to the technical field of wire clamp current-carrying capacity analysis, and the system comprises a wire clamp fastening force analysis module which is used for obtaining historical fastening force data, monitoring the relation between the current fastening force and contact resistance in real time, constructing a temperature change model, and analyzing the temperature change model; the optimal fastening force is determined based on an optimization model of the fastening force and the temperature, and the system comprises a first parameter acquisition unit, a wire clamp performance analysis unit and a fastening force control unit; the current-carrying capacity influence analysis module is used for determining the maximum current-carrying capacity of the wire clamp under the optimal condition by analyzing the influence of the fastening force and the temperature on the current-carrying capacity of the wire clamp, and comprises a second parameter acquisition module and a current-carrying capacity analysis unit; the wire clamp abnormity warning module is used for setting three-level warning and comprises a first-level abnormity warning module, a second-level abnormity warning module and a third-level abnormity warning module. According to the invention, the service life of the equipment is obviously prolonged, and the maintenance cost is reduced.
Owner:HUANENG ANYUAN POWER GENERATION CO LTD

Intelligent monitoring system for light steel structure

The invention relates to the technical field of building structure monitoring, in particular to an intelligent monitoring system for a light steel structure, which comprises an environmental data acquisition module used for acquiring environmental data in a monitoring period, a structural data acquisition module used for acquiring parameters of the light steel structure and structural deformation data in the monitoring period, and a stress analysis module used for analyzing the parameters of the light steel structure and the structural deformation data in the monitoring period. The system comprises an overall wind pressure analysis module for analyzing the overall wind pressure state of the light steel building, a lateral load analysis module for constructing a wind force vector and analyzing the stress state of a ground beam column, a transverse deformation monitoring module for analyzing the transverse deformation state of the light steel building, and a vertical load analysis module for analyzing the overall wind pressure state of the light steel building. The analysis module is used for analyzing the vertical load state of the light steel building in the monitoring period, and the stability analysis module is used for analyzing the stability of the light steel building in the monitoring period. The monitoring efficiency of the light steel structure is effectively improved.
Owner:BEIJING CHENGDONG INT MODULAR HOUSING

Large-span reticulated shell column deviation stress analysis method and system based on VR technology

The invention relates to the technical field of intelligent engineering, in particular to a large-span reticulated shell column deviation stress analysis method and system based on the VR technology, and the method comprises the following steps: generating a large-span reticulated shell VR model through the rendering of a Unity 3D engine in a VR interaction system, and carrying out the visualization through VR head display equipment; identifying a column deviation high-risk area in the large-span reticulated shell VR model through a risk positioning model loaded in a processor in the VR interaction system; and predicting structural stress data of the column deviation high-risk area through an interaction response prediction model loaded in a processor in the VR interaction system according to interaction behavior data received in the column deviation high-risk area through the VR handle. The large-span reticulated shell VR model is rendered through the VR interaction system, the deviation high-risk area is determined through the risk positioning model, analog simulation of the deviation adjustment process is achieved based on the interaction behavior data of the user through the interaction response prediction model, and the user experience is improved.
Owner:CHINA RAILWAY CONSTR GROUP CO LTD

A three-dimensional geological modeling and stress analysis method and system based on comprehensive geophysical exploration

The present invention relates to the technical field of three-dimensional modeling systems and modeling methods, and in particular to a three-dimensional geological modeling and stress analysis method and system based on comprehensive geophysical exploration. The method uses a comprehensive geophysical exploration method outside the tunnel to pick up data for three-dimensional modeling of poor geology before tunnel excavation in a poor geological area. The geophysical exploration data is used as the main data source to form a three-dimensional geological model before tunnel excavation. After tunnel excavation, the existing three-dimensional geological model is corrected according to the geological survey data and geophysical exploration data in the tunnel, and the three-dimensional geological model is refined and corrected. Three-dimensional visualization is performed on areas with serious poor geology. The data obtained by this model establishment method is more accurate and more referenceable. At the same time, the three-dimensional geological model is gridded and exported to a format recognizable by finite element software, and construction excavation stress analysis is performed to form various simulated excavation stress analysis diagrams. A data sharing module is also imported so that multiple participants can grasp the tunnel situation at the same time.
Owner:NANNING JIANXIE ENG INSPECTION CO LTD

Three-dimensional ice accretion reconstruction method and apparatus for fan blade, and device and storage medium

A three-dimensional ice accretion reconstruction method and apparatus for a fan blade, and a device and a storage medium. The method comprises: using a cross-sectioning method to cut a fan blade, so as to obtain two-dimensional airfoil-section coordinate data of each position; performing airflow field calculation on each two-dimensional airfoil section, so as to obtain an external airflow velocity of each two-dimensional airfoil section; performing force analysis on water droplets, calculating impingement positions of the water droplets on each two-dimensional airfoil section, and then calculating a local water droplet impingement coefficient and a freeze fraction; on the basis of the local water droplet impingement coefficient, the freeze fraction and environmental parameters, acquiring the thickness of an ice accretion on each two-dimensional airfoil section and an ice accretion shape on each two-dimensional airfoil section; on the basis of the thicknesses of the ice accretions, updating the two-dimensional airfoil-section coordinate data; performing ice accretion calculation at the next time step until a preset condition is met; and performing lofting processing on each two-dimensional airfoil section, so as to obtain a three-dimensional ice accretion shape result of the fan blade. The increased thicknesses and shape of ice accretions of a fan blade under different working conditions are quickly obtained with a small amount of calculation.
Owner:ELECTRIC POWER RES INST CHINA SOUTHERN POWER GRID CO LTD

Stress analysis system and method for probe

The invention relates to the technical field of semiconductor testing, in particular to a stress analysis system and method for a probe. The stress analysis system provided by the invention comprises a force measuring part which is used for simultaneously carrying out force testing on a probe tip and a probe tail of a probe of a probe assembly; the clamping part is used for positioning, clamping and fixing the probe assembly; the observation part is used for realizing alignment observation of the tip side and the tail side of the probe of the probe assembly; the control module is used for controlling the force measuring part to move relative to the probe assembly by inputting a control instruction and realizing stress test and analysis on the tip and the tail of the probe; wherein the force measuring part comprises at least two force measuring mechanisms which are symmetrically arranged on the needle tip side and the needle tail side and are used for simultaneously testing the force on the needle tip side or the needle tail side of the probe on the probe assembly. According to the invention, the probe tip and the probe tail can be simultaneously subjected to force measurement, so that the force transmission performance of the probe under actual working conditions can be comprehensively analyzed.
Owner:SHANGHAI ZENFOCUS SEMI-TECH CO LTD

Unmanned control method and system for crane

The invention relates to the technical field of crane control, in particular to an unmanned crane control method and system, which comprises the following steps: acquiring a running space, establishing a basic simulation space through simulation, acquiring a real-time space image, establishing an execution state space, and marking a starting point and an ending point to determine a track space; a dangerous object is identified, a safety space signal is determined, and after the safety space signal is detected, the gravity center of a transported object is obtained, a grabbing point is set, the transported object is hoisted, stress analysis is conducted, longitudinal inertia force is set, tipping and anti-tipping moments are calculated, and a deviation angle is adjusted to obtain a normal operation signal; and finally, carrying out stress analysis again according to the deviation angle, setting a transverse inertia force to calculate a horizontal direction moment, determining an acceleration critical value and setting a real-time operation acceleration. According to the method, shutdown is reduced through unmanned control, parameters are optimized, efficiency is improved, the method is adaptive to multiple scenes and multiple models, and technology upgrading is promoted.
Owner:SHANDONG LONGYUE HOISTING MACHINERY CO LTD

Bridge support column stress measurement method based on structure collaborative stress analysis

The invention provides a bridge supporting column stress measurement method based on structure collaborative stress analysis, and belongs to the technical field of stress measurement, and the method comprises the steps: collecting the stress, strain and displacement data of each bridge supporting column in real time; calculating a local stress index of each bridge support column based on the collected real-time data; according to the connection relation between the bridge overall structure parameters and the bridge supporting columns, a structure collaborative stress model is established; calculating a cooperative stress correction index of each bridge support column; and comparing the cooperative stress correction index with the dynamic stress evaluation interval, performing trend analysis in combination with historical data and environmental factors, judging whether a structural risk exists or not, and sending out an early warning signal when the structural risk exceeds a threshold value. According to the method, a structure collaborative stress analysis mechanism is introduced, the influence of the overall stress state of the bridge on a single bridge supporting column is comprehensively considered, key structure risk points can be recognized more accurately, and the reliability and early warning capacity of bridge safety monitoring are improved.
Owner:CCCC THIRD NAVIGATION BUREAU EIGHTH ENG (HUNAN) CO LTD

Treadmill with running posture analysis function and method for analyzing reaction force of running board

The present invention relates to the technical field of treadmills, and in particular to a treadmill with a running posture analysis function and a running board reaction force analysis method. The running board reaction force analysis method comprises the following steps: obtaining real-time air pressure data of the left airbag and the right airbag and generating air pressure time series curves respectively; distinguishing the left foot landing data segment, the right foot landing data segment and the two-foot-in-the-air data segment based on the air pressure time series curve; intercepting the left foot landing data segment and / or the right foot landing data segment used for reaction force analysis, and calculating the ground contact peak value by inferring the pressure exerted on the running board by the user during running based on the peak air pressure data. The data source of the present invention is the direct reflection of the force exerted by the running board on the sole of the foot, which can intuitively reflect the user's ground contact peak value and impact load rate. Moreover, the method does not require wearing and does not affect the user's daily running habits.
Owner:SHUHUA SPORT CO LTD

Super-large-diameter shield segment structure stress spatialization analysis method

The invention relates to the technical field of shield segment stress analysis, and discloses a super-large-diameter shield segment structure stress spatialization analysis method which comprises the following steps: S01, scanning a shield segment and modeling; step S02, carrying out corner mark number and pressure simulation; s03, calculating the total space pressure of the shield segment; step S04, calculating partial pressure of the shield segment on a space coordinate axis; s05, calculating the simulated total pressure borne by the shield tunnel on the space coordinate axis; s06, calculating the maximum total pressure which can be actually borne by the shield tunnel; s07, preliminarily judging the feasibility of shield tunnel construction; s08, the shield segment is monitored in real time; by arranging the step S05, pressure simulation on the shield tunnel and spatial stress analysis on the shield tunnel are facilitated, so that pressure simulation of the shield tunnel is more accurate, and a data basis is provided for subsequent judgment of the shield tunnel.
Owner:绍兴市柯桥区建筑管理中心 +1

Comprehensive stress analysis and calculation method for main bearing of shield tunneling machine

The invention belongs to the field of bearing manufacturing, particularly relates to a comprehensive stress analysis and calculation method for a main bearing of a shield tunneling machine, and mainly provides a comprehensive stress analysis and rapid calculation method for the design and checking process of the main bearing of the shield tunneling machine. According to the method, the force generated by the bolt, the contact force between the roller and the raceway surface, the contact force between the flange surface and the ferrule and the calculation method of the external force borne by the system are determined, the stress forms a resultant force matrix, a nonlinear equation set is solved to obtain a displacement matrix, and finally the bearing condition of each stress unit is obtained. According to the method, factors such as clearance, roller shaping and ferrule compression are considered, and the influence of interaction among the units on the bearing conditions of the units is considered, the stress conditions of the rollers, the bolts and the contact surfaces can be simply and quickly calculated, and a basis is provided for design and check of the main bearing of the shield tunneling machine.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

A portrait examination and identification method based on gait cycle decomposition and multi-phase force analysis

The application discloses a portrait inspection and identification method based on gait cycle decomposition and multi-phase force analysis, and comprises the following steps: extracting the skeleton key points of a target object in a target object image set in a comparison video and the confidence score of each skeleton key point; extracting the features of the target object in the target object image set according to the skeleton key points of the target object, and obtaining the target object features, wherein the target object features comprise basic features, gait cycle features, gait stage features and gait parameter features; integrating the basic features, the gait cycle features and the gait stage features to obtain comprehensive features; respectively calculating the similarity of the target object features and the comprehensive features in the comparison video to obtain similarity calculation results and overall similarity calculation results; and obtaining the identity identification result of the target object according to the similarity calculation results and the overall similarity calculation results.
Owner:BEIJING TONGDA FAZHENG TECHNOLOGY CONSULTING CO LTD

A precise movement correction control system and method for an unmanned workboat

This invention relates to a precise motion correction control system and method for an unmanned workboat, belonging to the field of unmanned vessels. The system comprises a workboat hull, an accelerometer, a spirit level, and a central processing unit installed on the hull. The method comprises the following steps: S1: initialization; S2: receiving client instructions to perform operations; S3: real-time sensing of the hull state using the installed accelerometer, spirit level, and pressure sensor; S4: force analysis of the hull based on empirical formulas and the sensed hull state, calculating the theoretical action of the water pump; S5: selecting a candidate experience pool that meets the error limit requirements using a KNN network; S6: calculating the optimal action using a DQN network; S7: sending corresponding control instructions to the water pump according to the optimal action and executing them; S8: repeating steps S3 to S7 until the operation is completed. This invention can effectively reduce the action solution space, reduce the complexity of the solution, and improve control accuracy, thereby enhancing the adaptability of unmanned workboats to complex environments.
Owner:CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACAD OF SCI

Early warning decision-making method and system for flood inrush disaster in submarine tunnels across faults

The present invention belongs to the technical field related to tunnels. In order to solve the problems of inaccurate water inrush identification and lack of interpretability in high-risk scenarios where existing submarine tunnels cross fault zones, a submarine tunnel cross-fault water inrush disaster warning decision-making method and system are proposed, and a joint modeling path of attention mechanism and Bayesian inference is constructed to realize the full-process response control of input features from weighting, prediction to interpretation; an interpretable model is used for driving force analysis, thereby providing transparent and reliable risk assessment results; and the key driving forces in multi-source heterogeneous data are combined to realize real-time identification and warning of tunnel water inrush risks through numerical simulation of water inrush disaster situations, effectively improving the accuracy of water inrush risk identification and the perfection of the warning mechanism during tunnel construction, and having important engineering application value.
Owner:SHANDONG UNIV

A dry splicing node intelligent monitoring interface pad

The present invention discloses a dry-type splicing node intelligent monitoring interface pad, which relates to the technical field of prefabricated structural buildings. The key points of its technical solution are: comprising a pad body, the pad body is provided with at least one hole penetrating its opposite side wall, the hole is provided with an analysis sensor, and the analysis sensor is adapted to the size of the hole; the analysis sensor comprises a rubber tube, two flexible filters, two force analysis elements and a water quality analysis absorption element; the two force analysis elements are fixedly connected to the outer wall of the rubber tube, and the two flexible filters are respectively connected to the two ports of the rubber tube and are located inside the rubber tube. The interface pad is used between the splicing positions of two prefabricated components, and can monitor the stress and water seepage of the contact interface in real time, analyze the water quality components, thereby providing data support for possible risks, and formulating targeted emergency measures to improve the efficiency and effect of building maintenance.
Owner:SHENZHEN UNIV

Forward design method and device for steel plate composite beam based on BIM (Building Information Modeling)

The invention discloses a BIM-based steel plate composite beam forward design method and device, and relates to the technical field of bridge engineering.The method comprises the steps that parameterization design is conducted on the structure of a steel plate composite beam, and parameterization data of the steel plate composite beam are obtained; constructing a route model according to the geological survey data and the oblique photography data; building a BIM model of the steel plate composite beam according to the parameterized data of the steel plate composite beam, the route model and the three-dimensional model of each component of the steel plate composite beam; and carrying out stress analysis and three-dimensional verification on the BIM model of the steel plate composite beam to obtain design data of the steel plate composite beam. According to the method, the BIM model of the steel plate composite beam is constructed according to the parameterized data, the route model and the three-dimensional model of each component of the steel plate composite beam, so that the efficiency and precision of designing the structure of the steel plate composite beam can be effectively improved, the probability of reworking, waste and construction accidents in the construction process is reduced, and remarkable economic benefits are achieved.
Owner:CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE CO LTD

Design method of high-speed railway bridge capable of driving in beam

The invention relates to the technical field of rail transit, in particular to a method for designing a high-speed railway bridge with in-beam travelling, which comprises the following steps: determining the clear width and clear height of a box beam chamber, keeping the clear width and clear height of the box beam chamber constant along the length direction of the bridge, and arranging a rail on a bottom plate of the box beam; according to the designed running speed of the train and the clear width and the clear height of the box girder cavity, simulation analysis is conducted on the aerodynamic effect in the box girder cavity for the most unfavorable working condition when the train runs; according to simulation analysis results of the mechanical effect and the aerodynamic effect of the train, stress analysis is conducted on the box girder in software, then the theoretical thickness of a box girder bottom plate, a box girder web and a box girder top plate is determined, and design is completed. According to the design method, the defects that in the prior art, when a train runs in a box girder, the aerodynamic effect of an inner cavity of the box girder is obvious, stress of all positions of the box girder cavity is different, but no corresponding design method exists at present are overcome.
Owner:CHINA RAILWAY ERYUAN ENGINEERING GROUP CO LTD

Calculation method, device and storage medium for bearing performance of pile structure with bearing platform type

The application discloses a bearing capacity calculation method and device of a pile structure with a bearing platform and a storage medium, and solves the problem that the design method is relatively complex and the calculation result is not accurate in the prior art. The calculation method comprises the following steps: obtaining size parameters and adjacent soil parameters of a bearing pile, a bearing platform and a foundation pile in the pile structure with the bearing platform; inputting the size parameters and the adjacent soil parameters into a bearing capacity calculation model to obtain bearing capacity data output by the bearing capacity calculation model; and the bearing capacity data at least comprises: a pushing force of a rear soil body on the bearing pile, a counterforce of the bearing platform, an eccentricity of the counterforce of the bearing platform, a stress of the counterforce of the bearing platform and an axial pressure at a bottom end of the bearing pile, which are obtained by solving a soil pressure analysis model based on the bearing pile; and a positive section bending moment of the bearing platform, a downward punching shear damage of the bearing pile on the bearing platform and an upward punching shear damage of a rear row of foundation piles on the bearing platform, which are obtained by solving an asymmetric force analysis model based on the bearing platform.
Owner:SOUTHWEST JIAOTONG UNIV

A high-precision spring arm fatigue analysis method

This invention discloses a high-precision fatigue analysis method for spring arms, comprising the following steps: S1: Preprocessing the model using mesh preprocessing software and calculating the stress distribution of the part under fatigue conditions using finite element analysis; S2: Analyzing the fatigue life using fatigue analysis software; S3: Comparing the fatigue results obtained through experiments with the analyzed values. The method closely approximates actual experiments in simulating the constraints and loads on the spring arm's motion, resulting in better convergence of the force analysis. It addresses the accuracy issues caused by the complex forces at the spring points of the spring arm, and the analysis results show high consistency with actual experimental verification. This allows for early risk identification in the design phase, improving development efficiency and reducing development costs. It features high versatility and accurate calculation results.
Owner:NINGBO TUOPU GROUP CO LTD

Intelligent control system and method for closure of long-span steel truss girder cable-stayed bridge

The present application relates to a kind of large-span steel truss beam cable-stayed bridge closure intelligent control system and method, adopt beidou positioning instrument, wireless tiltmeter and IMU sensor etc. and form closure intelligent control system, reduce the difficulty of construction survey, improve the measurement efficiency.The data obtained by the automatic monitoring system are analyzed to analyze the closure mouth state and control the force analysis of construction adjustment, the closure mouth state is adjusted using full-automatic hydraulic jack, and the large-span steel truss beam cable-stayed bridge is closed in the middle of the span by combining fine adjustment measures.The method helps to reduce the waiting operation time of large cantilever construction, solves the problems of low construction efficiency, different synchronization of closure adjustment measures, and realizes the accurate closure of large-span steel truss beam cable-stayed bridge.
Owner:CHINA FIRST HIGHWAY ENGINEERING CO LTD +6

A tunnel construction water inrush monitoring device

The present invention discloses a tunnel construction water gushing monitoring device, which belongs to the technical field of tunnel construction. The device comprises a base and a float, wherein a silk thread is connected between the base and the float, and further comprises a retractable assembly and a load adjustment system; the load adjustment system comprises a data acquisition module, a force analysis unit, a torque analysis unit, an adjustment module, an offset angle analysis unit and an early warning unit; the present invention uses the retractable assembly and the load adjustment system to not only dynamically adjust the tension of the silk thread to cope with water flow impact and rockfall interference, and prevent the problem of easy deviation or entanglement of the cable in traditional float monitoring; the data acquisition module can also be used to collect water flow velocity, vertical cross-sectional area of ​​the silk thread entering the water and rockfall status data in real time, comprehensively evaluate the water gushing risk and generate an early warning signal, thereby improving the stable operation of the device in a complex tunnel environment, thereby improving the stability of the float on the water surface, and providing reliable protection for tunnel construction safety.
Owner:SHANXI PROVINCIAL HIGHWAY BUREAU JINCHENG BRANCH +1

Hovering method and structure of rescue boat

The invention discloses a rescue ship hovering method and structure, and belongs to the field of ships. A plurality of propellers which are rotationally mounted are arranged at the bottom of a ship; calculating a required moving track according to the real-time position and the hovering position of the speed boat; performing stress analysis on the speed boat model according to the real-time water flow direction, the real-time water flow speed, the real-time wind direction and the real-time wind speed data; according to the stress analysis result and the needed moving track, the thrust magnitude and direction of the multiple propellers are distributed; the driving piece drives the propeller to rotate relative to the ship bottom to change the direction of propelling force, and the propeller propels according to the distributed propelling force; after the real-time position and the hovering position of the speed boat are overlapped, environment data are continuously collected, stress analysis is conducted, the thrust magnitude and the thrust direction of the multiple propellers are distributed according to the stress analysis result so that the speed boat can be kept hovering, and through the steps, the multiple propellers capable of changing the direction at the bottom of the speed boat control the speed boat to hover at the fixed position. And the hovering control precision is high.
Owner:SUZHOU TENGWEI ELECTRONICS CO LTD

A Potentiometer Adjustment Hole Locating Method Based on Force Feedback Rectangular Search Strategy

This invention relates to the field of debugging and testing technology for airborne equipment, specifically a method for locating potentiometer adjustment holes based on a force feedback rectangular search strategy. The method includes the following steps: S1, hole error analysis; S2, force analysis; S3, hole-finding strategy design; S4, specific hole-finding process. This invention provides a method for locating potentiometer adjustment holes based on a force feedback rectangular search strategy. Compared with existing technologies, without increasing hardware investment or significantly increasing system computation, it improves the hole-finding accuracy from 80.8% to 98.3%, enhancing the overall efficiency of the automatic debugging system. Furthermore, during the hole-finding process, the contact force between the screwdriver and the potentiometer adjustment knob panel is always kept within a set safety threshold range, preventing damage to the potentiometer.
Owner:WUHU STATE-OWNED FACTORY OF MACHINING