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515 results about "Catenary" patented technology

In physics and geometry, a catenary (US: /ˈkætənɛri/, UK: /kəˈtiːnəri/) is the curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends. The catenary curve has a U-like shape, superficially similar in appearance to a parabolic arch, but it is not a parabola.

Automatic fastening system and method for overhead line system cantilever bolt

The invention discloses an automatic fastening system and method for overhead line system cantilever bolts. The system comprises a maintenance car, a visual ranging parking unit, a laser radar sensing unit, a mechanical arm execution unit, a force feedback control unit, a tail end execution unit, a digital twin unit and an operation management platform. The method comprises the following steps: S1, guiding a maintenance car to stop below a cantilever of the overhead line system; s2, scanning an overhead line system cantilever, generating a three-dimensional model and positioning a bolt; s3, planning a collision-free path; s4, smooth alignment of the bolt sleeve is achieved; s5, bolt fastening is completed according to the preset torque; s6, synchronously displaying the operation progress, and storing whole-process operation data; and S7, performing anomaly detection and task continuous transmission on the whole process, and performing data archiving and early warning. Intelligent and automatic bolt fastening operation is achieved for the first time in the field of railway contact network maintenance, and an effective solution is provided for improving the railway operation and maintenance efficiency and safety.
Owner:SOUTHWEST JIAOTONG UNIV

Method for generating fitting catenary through point cloud data

The invention discloses a method for generating a fitting catenary through point cloud data. The method is used for designing or maintaining a target electric power facility. The method comprises the following steps: acquiring point cloud data of a target electric power facility through sensing equipment; preprocessing the collected data, including denoising, segmentation and coordinate transformation, so as to extract key point data related to the catenary; based on the preprocessed key point data, establishing a catenary mathematical model containing gravity, tension and catenary length parameters; solving the parameters of the mathematical model by using an optimization algorithm, and minimizing the deviation between the model and the key point data; and finally, according to a fitting calculation result, generating a geometrical shape and parameterized description of the catenary. According to the method, point cloud data processing and catenary modeling technologies are combined, the catenary characteristics in the electric power facility are efficiently and accurately fitted, and the method is suitable for engineering requirements in catenary form analysis and electric power facility design and maintenance.
Owner:襄阳诚智电力设计有限公司 +1

Method and system for optimizing dropper arrangement of high-speed railway overhead line system based on machine learning

The invention relates to the field of intelligent operation and maintenance of a high-speed railway overhead line system, provides a machine learning-based optimization method and system for dropper arrangement of the high-speed railway overhead line system, and aims to solve the problems of insufficient pantograph-catenary coupling stability and relatively low abrasion uniformity of the overhead line system. The method comprises the steps that contact force space distribution characteristics of a pantograph and a contact net are collected, and contact force balance constraint conditions are generated; constructing a line parameter compensation mechanism by combining the track ultrahigh value, the vertical curve curvature and the elevation data of the suspension point acquired by the laser scanner, and outputting a compensation three-dimensional coordinate of the suspension point of the overhead line system; a programmable gate array is adopted to implement parallel acceleration on neural network weight calculation and space coordinate transformation, contact force constraint and compensation coordinates are iteratively processed, and dropper arrangement parameters are generated; based on the segmented tension value and the node offset compensation value, driving equipment to finish accurate adjustment and positioning installation of the dropper. According to the technical scheme provided by the invention, the pantograph-catenary coupling stability and the wear uniformity of the catenary are improved.
Owner:CHINA RAILWAY ELECTRIFICATION ENGINEERING GROUP CO LTD +1

Control system and method of controlling towed marine object

A control system for a towed object (1, 6; 20; 30; 50) in or on a body of water comprise one or more towing members (3) extending between the object (1) and a towing vessel (2). One or more ballast members (4) are movably connected to a respective one of said one or more towing members (3) and controllably movable at least a distance along its respective towing member. The towed object (1) may be controlled by moving one or more ballast members (4) on a towing member (3) in order to control the catenary (c) of a towing member (3). Individual ballast members (4) may be manipulated individually in order to correct, preserve or otherwise change the geometry of a trawl.
Owner:KARMOEY WINCH

Multi-source sensing fusion method and system for state evaluation of contact network compensation device

The invention relates to the technical field of railway catenary monitoring, in particular to a multi-source sensing fusion method and system for state evaluation of a catenary compensation device, and the method comprises the steps: obtaining multi-source sensing data such as vibration, temperature and current, generating a phase space trajectory through employing a self-adaptive phase space reconstruction technology, and carrying out the state evaluation of the catenary compensation device; multiple topological features are extracted to form topological feature vectors, and the vectors are combined with temperature and current data to construct a fault probability model. According to the method, the health degree score of the contact network compensation device can be calculated, trend prediction can be carried out, early warning information can be generated, high-precision early warning is realized, the clamping stagnation risk of the pulley block can be predicted three months in advance, passive response is converted into active prevention, the maintenance efficiency and safety of the contact network are remarkably improved, and the maintenance cost is reduced. By means of the innovative technology, the safety of railway operation is improved, the maintenance cost is reduced, and revolutionary transformation is brought to the railway industry.
Owner:LANZHOU JIAOTONG UNIV +1

Method and system for evaluating reliability of contact network system under icing galloping condition

The invention discloses a method and a system for evaluating the reliability of a contact network system under an icing galloping condition. The method comprises the following steps: collecting icing galloping data of the overhead line system in real time, and carrying out load conversion and statistics on parts of the overhead line system in icing galloping by adopting a rain flow counting method; the reliability of parts under the icing galloping condition is calculated through the Miner cumulative damage theory, and weight distribution of the overhead line system is conducted through an analytic hierarchy process; based on the reliability and the weight distribution result of each part under the icing galloping condition, evaluating the reliability of the overhead line system of the data acquisition anchor section until the evaluation task is finished; the method and the system provided by the invention are suitable for evaluating the operation reliability of the contact network system in the icing galloping section, can provide support for operation and maintenance of the contact network system after icing galloping occurs, and have wide application prospects.
Owner:CHINA RAILWAY DESIGN GRP CO LTD

Subway section parameterized linear digital model construction method based on Revit and Dynamo

The invention provides a metro section parameterized linear digital model construction method based on Revit and Dynamo, and the method comprises the steps: building a three-dimensional space control reference through analyzing track line design data, and constructing a metro section model in a manner of combining parameterized modeling with an intelligent algorithm; the contact network and pipeline models are ensured to meet the standard requirements through real-time verification of the conductor height change rate and the turning radius-pipe diameter matching matrix; space coordinate unification and interface matching precision control are achieved through a multi-professional model cooperation system, and a parameter linkage updating mechanism is established to respond to design changes; and finally, outputting an LOD400 precision BIM model and associating construction data for dynamic correction, and supporting RVT / IFC format conversion and engineering quantity automatic statistics. The method is mainly used for efficient collaborative design and construction management and control of metro sections, the modeling precision and the multi-specialty coordination efficiency can be improved, and the design error rate is reduced.
Owner:SINOHYDRO BUREAU 6 CO LTD

Conversion method for lightweight three-dimensional tile of component-level contact network three-dimensional model

The invention belongs to the technical field of geospatial information systems, and particularly relates to a component-level catenary three-dimensional model lightweight three-dimensional tile conversion method, which comprises the following steps: S1, forming a component-level fine model data set with semantic annotations; s2, constructing a detail level division rule; s3, reconstructing a lightweight linear component model; s4, constructing a comprehensive evaluation function Q, deleting the body-shaped components of which the Q values are smaller than a preset threshold value, and retaining the body-shaped components of which the Q values are greater than or equal to the preset threshold value; s5, obtaining optimized body-shaped component model data; and S6, according to the detail level division rule in the S2, assembling and recombining the lightweight linear component model in the S3 and the optimized body-shaped component model data in the S5, generating a hierarchical component structure, converting each component into a three-dimensional instance model, and outputting a three-dimensional tile data structure. And efficient organization and visualization of the contact network BIM model in the GIS environment are realized.
Owner:四川电力设计咨询有限责任公司

A rigid catenary disconnection device

The present invention provides a rigid catenary disconnection device, belonging to the technical field of catenary. It solves the problem that the existing disconnection device cannot close large-width vertical rotating flood control doors. This rigid catenary includes a fixedly arranged first busbar, a second busbar, a third busbar and a fourth busbar. The third busbar and the fourth busbar are located between the first busbar and the second busbar. The disconnection device includes a mounting post, a cantilever capable of rotating around the mounting post, and a switching clamp arranged on the cantilever. When the switching clamp is closed, it can clamp the third busbar and the fourth busbar to connect the third busbar and the fourth busbar. When the switching clamp is opened, the third busbar can rotate around the first busbar under the action of its own gravity, and the fourth busbar can rotate around the second busbar under the action of its own gravity. This disconnection device has the advantage that after the rigid catenary is disconnected, enough distance can be vacated to enable the large flood control door to be closed.
Owner:ZHEJIANG WANGLONG RAIL TRANSIT EQUIP CO LTD

Intelligent surveying and mapping system for catenary equipment in tunnel

The invention discloses an intelligent surveying and mapping system for catenary equipment in a tunnel, which relates to the technical field of catenary engineering detection and comprises a multi-source data acquisition module, a multi-source data fusion module, an identification and parameter calculation module, a modeling and interaction module and a data management and application output module. According to the invention, by deploying the multi-dimensional sensor, the limitation of traditional manual inspection or dependence of a single sensor is broken through aiming at the environments of insufficient illumination, high dust concentration and the like in the tunnel, the laser scanner can penetrate through the dust to obtain the three-dimensional geometric framework of the equipment, and the Beidou positioning assembly is bound with the collection action in real time; the problem of positioning deviation caused by weak GPS signals in the tunnel is solved, the environment sensor group monitors parameters such as temperature, humidity and illumination in real time, and through a dynamic adaptation fusion coefficient formula, sensor data weight is calculated, original coordinate deviation is corrected, a four-dimensional fusion data set is constructed, and errors caused by environment interference or data isolation in a traditional method are solved.
Owner:XIAN BRANCH OF CHINA RAILWAY WUHAN ELECTRIFICATION BUREAU GRP CO LTD

Nonlinear pantograph-catenary system state prediction method based on physical information neural network

The invention relates to the technical field of pantograph-catenary system monitoring, and discloses a nonlinear pantograph-catenary system state prediction method based on a physical information neural network, and the method comprises the steps: obtaining the structural parameters of a catenary and a pantograph in a nonlinear pantograph-catenary system, and the train speed; a multi-expert Mama network based on Fourier transform is constructed; utilizing the first full connection layer to map input features formed by the structural parameters of the contact net and the pantograph and the train speed to a high-dimensional feature space to obtain first high-dimensional features; frequency domain features are extracted from the first high-dimensional features by using a plurality of cascaded multi-expert Mamba network layers, and time sequence features are modeled at the same time; fusing the spliced frequency domain feature and the time sequence feature by using a second full connection layer to obtain a second high-dimensional feature fusing the time-frequency energy and the dynamic evolution information; and performing nonlinear pantograph-catenary system state prediction according to the second high-dimensional features. According to the invention, the state prediction accuracy of the nonlinear pantograph-catenary system can be improved.
Owner:SOUTHWEST JIAOTONG UNIV

Intelligent deicing method and system for overhead line system

The invention relates to the technical field of overhead line system deicing, and discloses an intelligent deicing method and system for an overhead line system. The method comprises the following steps: firstly, acquiring ice layer monitoring data such as ice layer thickness distribution information, environment temperature information and wind speed information of a contact network area in real time; inputting the data into a simulation modeling tool, and constructing a three-dimensional ice layer distribution model of the overhead line system; judging whether deicing is needed or not according to matching of ice layer thickness distribution information in the model and a preset ice layer thickness threshold value mapping table; if yes, deicing equipment position parameters and deicing agent type parameters are extracted from a preset parameter database, and the deicing agent applying process is simulated in the three-dimensional model; and finally, outputting an ice layer fracture path, an ice melting range and deicing efficiency data, analyzing rationality, matching degree and effectiveness, and generating a parameter optimization instruction to adjust subsequent deicing parameters.
Owner:LANZHOU JIAOTONG UNIV

Intelligent detection method for catenary concealment defect based on multi-modal large model

The invention discloses an intelligent detection method for a catenary concealment defect based on a multi-modal large model, and belongs to the technical field of intelligent inspection of a rail transit power supply system. According to the method, multi-source sensing data such as images, laser point clouds, infrared thermograms and structural sound waves are fused, and a unified multi-modal input data set is constructed. And the data quality and the fusion precision are improved through processing means such as space-time synchronization, registration and feature normalization. A multi-mode large model based on a Transform framework is adopted to carry out deep semantic modeling on fused data, feature information related to hidden defects is automatically extracted, and accurate recognition and positioning of early defects such as insulator fine cracks, early corrosion of hardware fittings, local corrosion of contact lines and micro displacement of a suspension system in an overhead line system are achieved. According to the method, the automatic and intelligent recognition capability of the catenary concealment defect can be remarkably improved, and the method is suitable for various scenes such as high-speed railways, urban rail transit and heavy haul railways.
Owner:JIANGSU NEW GREEN ENERGY TECH CO LTD

Method for measuring geometric parameters and abrasion of rigid contact network based on point cloud data

The invention discloses a rigid contact network geometric parameter and abrasion measurement method based on point cloud data, and relates to the technical field of rail transit, and the method comprises the following steps: S1, collecting contact network point cloud image data in real time, and screening out a busbar-conductor point cloud profile area in the contact network point cloud image data; s2, extracting all busbar feature line segments in the busbar point cloud profile area; s3, performing rotation correction on the busbar-conductor point cloud profile area; and S4, clustering and fitting the corrected conductor point set in the conductor point cloud profile area by using a least square method to obtain a standard circle where the conductor is located and a conductor wear straight line, and measuring and outputting geometric parameters and wear of the overhead line system by using the standard circle and the wear straight line. According to the method, the noise interference is eliminated by adopting the minimum region method, the direction integral and the least square clustering, so that the precision of the measured abrasion and geometric parameters reaches the millimeter level, and the precision is high.
Owner:CHINA RAILWAY DESIGN GRP CO LTD +2

Pantograph comprising a safety device and method implemented by such a pantograph

The invention relates to a pantograph (1) for a rail vehicle, the pantograph comprising a structure and an articulated frame (5) mechanically connected to the structure, and a head mechanically connected to the articulated frame, wherein the pantograph is characterised in that it comprises a safety device (36) and an actuator (30) configured to act on the articulated frame via the safety device, and wherein the safety device is configured to selectively: - mechanically couple the actuator to the articulated frame, whereby the articulated frame can be moved, by the actuator, between a raised position in which the head is in contact with a catenary and a lowered position in which the head is brought closer to the structure; and - mechanically uncouple the actuator from the articulated frame, whereby the articulated frame moves into the lowered position, under its own weight, independently of the action of the actuator.
Owner:FAIVELEY TRANSPORT TOURS

Method and device for determining catenary of mountain slope transmission system

The invention provides a mountain slope transmission system catenary determining method and device, and the method comprises the steps: obtaining the arrangement parameters of a transmission system on a mountain slope, and the arrangement parameters at least comprise the horizontal distance between two fixed points of the transmission system, the vertical height difference, and the total length of a rope of the transmission system; based on the arrangement parameters, a simultaneous equation with the catenary opening coefficient as a core unknown quantity is established, and the simultaneous equation comprises the arc length constraint of the catenary and the height difference constraint of the two end points at the same time; solving the simultaneous equation to obtain a numerical solution of the catenary opening coefficient; and determining a catenary shape and a core engineering index of the transmission system on the mountain slope under the action of gravity according to the solved catenary opening coefficient. According to the method and the device, the engineering design precision is improved, and material redundancy and adjustment cost caused by shape uncertainty are saved.
Owner:BEIJING SHIDAI CHONGSHU TECHNOLOGY CO LTD

Three-dimensional reconstruction method, device and equipment of power transmission conductor and storage medium

The invention discloses a three-dimensional reconstruction method, device and equipment for a power transmission conductor, and a storage medium. The method comprises the following steps: acquiring original point cloud data of a conductor in a target area; performing coarse extraction on the original point cloud data to obtain coarse extraction point cloud data; performing classification extraction on the coarsely extracted point cloud data to obtain target point cloud data; conducting wire aerial form fitting on the target point cloud data based on a catenary equation to obtain a catenary aerial fitting result; according to the method, the lead in the target area is reconstructed according to the catenary air fitting result, the lead three-dimensional scene model is obtained, the real state and the space relation of the transmission lead can be reflected more accurately, and the reconstruction quality of the lead three-dimensional scene model is improved.
Owner:DALI POWER SUPPLY BUREAU YUNNAN POWER GRID

Contact network guide height adjusting method and system

The invention provides a catenary height adjustment method and system, and relates to the technical field of catenary height adjustment, and the method comprises the steps: obtaining the on-site measurement data of the height of a conductor in the span of a catenary; establishing a statics model of the elastic chain type suspension based on a parabola unit hypothesis; calculating the dropper force of each dropper according to the measurement data and the stress balance principle of the parabola unit; the vertical displacement of each node of the carrier cable is solved through a moment balance equation, and then the space coordinates of the carrier cable are obtained; calculating the theoretical length of each dropper according to the coordinates of the carrier cable, the design height of the contact line and the dropper force; and comparing the theoretical length with the dropper length in a standard state to generate a dropper length adjustment strategy. The method provided by the invention not only can realize measurement bottleneck breakthrough, but also can be suitable for complex suspension conditions, and in addition, can also ensure the performability of an adjustment strategy, output a quantified dropper shortening amount and guide accurate construction.
Owner:SOUTHWEST JIAOTONG UNIV +1

Vortex-induced fatigue analysis method and device for deep-sea steel catenary riser, electronic equipment and storage medium

The invention discloses a vortex-induced fatigue analysis method and device for a deep-sea steel catenary riser, electronic equipment and a storage medium, and belongs to the technical field of ocean facilities. The method comprises the following steps: acquiring motion data of an offshore platform; determining an equivalent oscillatory flow of the offshore platform based on the motion data; according to the equivalent oscillatory flow, vortex-induced vibration response of the deep-sea steel catenary riser is determined based on fluid-structure interaction effect analysis; according to the vortex-induced vibration response, the equivalent stress time history of the deep-sea steel catenary riser is obtained through calculation, and therefore a vortex-induced fatigue analysis result is determined. According to the invention, the platform motion can induce the riser to generate vortex-induced vibration, the equivalent mode is established to convert the platform motion into the oscillatory flow, and the fluid-solid coupling effect between the riser and the flow field is considered, so that the calculation is easy to realize and the precision is high; the perfection degree and reliability of the vortex-induced fatigue analysis result of the deep-sea steel catenary riser can be improved, and the fatigue damage degree of the deep-sea steel catenary riser can be accurately mastered.
Owner:SANYA SCI & EDUCATION INNOVATION PARK WUHAN UNIV OF TECH

Continuous uphill and downhill construction sag determination method and system considering strain string influence

The invention relates to the technical field of power transmission line construction, in particular to a continuous uphill and downhill construction sag determination method and system considering the influence of a strain string, and the method comprises the steps: obtaining basic parameters of a continuous uphill and downhill line; the method comprises the following steps: establishing a mechanical model containing a strain string, regarding the strain string as a catenary unit with distributed weight, forming a continuous span combined stress system with a lead, and constructing a mechanical equilibrium equation set of the system; based on the mechanical equilibrium equation set, adopting an iterative algorithm to solve the tension value of the continuous-gear wire gear by gear, taking the initial tension of the first gear as a starting point, and sequentially iterating to determine the final tension; calculating a construction sag value according to the final tension in combination with each span parameter and a tension string deflection angle; and outputting the sag value of each gear and the corresponding wire clamp installation position adjustment parameter. According to the method, the sag calculation precision of the continuous uphill and downhill terrains is improved, and the design and construction accuracy is guaranteed.
Owner:CONSTR BRANCH OF STATE GRID XINJIANG ELECTRIC POWER CO LTD +2

Submarine cable laying grounding tension control system and method

The invention discloses a submarine cable laying grounding tension control system and method, and belongs to the field of ocean submarine cable construction. The submarine cable laying grounding tension control system comprises a cable laying machine, a water entering bridge and a processor which are arranged on a cable laying ship, and a plurality of horizontal rollers arranged between the cable laying machine and the water entering bridge. The submarine cable forms a first catenary after being separated from the cable laying machine, and forms a second catenary after being separated from the water inlet bridge. A preset formula in the processor can calculate the difference value # imgabs0 # between the corrected submarine cable tension at the seabed grounding point and the minimum allowable submarine cable tension, and according to the difference value # imgabs0 #, the cable laying speed of the cable laying machine is adjusted, so that the # imgabs1 # tends to 0, and the # imgabs2 # is matched with TR, fine control over the submarine cable grounding tension is achieved, and the cable laying speed of the cable laying machine can be accurately controlled.
Owner:SHANGHAI CONSTRUCTION GROUP CO LTD +1

System for simulating condition of contact between pantograph and overhead line system after earthquake

The invention discloses a system for simulating the contact condition of a pantograph and a contact net after an earthquake. Relates to the field of railway bridge contact net anti-seismic tests. The system comprises a contact network simulation assembly, a train simulation assembly and a vibration table assembly. The contact network simulation assembly comprises a winch, a contact rope and two supporting columns. The two supporting columns are fixedly arranged at intervals, the winch is arranged at the top ends of the supporting columns and used for driving the contact rope to slide between the two supporting columns, the train simulation assembly comprises a train body, wheel parts arranged below the train body and a pantograph arranged on the train body, and the pantograph is in contact with the contact rope; the vibration table assembly comprises a table body and a vibrator used for vibrating the table body. The table body comprises a plurality of table tops which are independently arranged; the wheel part is placed on the table body; the vibration table assembly is adopted, each wheel below the train head is placed on the corresponding vibration table, and compared with the situation that a large vibration table top is placed below each wheel of a front bogie and a rear bogie, the real situation that the vibration states of all the wheels are different when a train runs on an unsmooth track after an earthquake is better met, the requirement for laboratory equipment conditions is lower, and the working efficiency is improved. Theoretically, test simulation is easier to realize, and the test result is more real, accurate and comprehensive.
Owner:NAT ENG LAB FOR HIGH SPEED RAILWAY CONSTR +1

Subsea risers

A subsea catenary riser comprises a rigid riser pipe that is suspended from a floating support on the surface and extends through a sagbend to the seabed. A hang-off interface allows rotation or pivoting of the riser pipe relative to the support about mutually orthogonal horizontal axes. A subsea buoy is positioned on the riser pipe above the sagbend. The buoy applies buoyant upthrust force to the riser pipe via an attachment interface that allows rotation or pivoting of the riser pipe relative to the buoy about mutually orthogonal horizontal axes. In response to movement of the support, the riser pipe deflects with S-shaped curvature to vary the inclination, relative to the buoy, of the portion of the riser pipe to which the buoy is attached. The curvature comprises mutually opposed curves respectively above and below the buoy, joined by a region of inflection that coincides with the buoy.
Owner:SUBSEA 7 DO BRASIL SERVICOS LTDA

Spring pantograph adjusting force system

The invention discloses a spring pantograph force adjusting system which comprises a bottom frame, a spring system, a force adjusting mechanism and an electric drive system. The bottom frame is of a frame welding structure, located at the bottom of the pantograph and used for supporting connecting components, the spring system is used for driving the lower arm to enable the pantograph to rise, and the force adjusting mechanism and the electric drive system are used for adjusting force. According to the spring pantograph force adjusting system, a force adjusting mechanism, an electric drive system and a spring drive system are integrally designed at the position of a pantograph underframe, the purpose that the spring force is adjustable in the pantograph running process is achieved, and the problems that the spring force of a high-speed spring pantograph cannot be adjusted, and the pantograph net following performance under high-speed running cannot be guaranteed are solved. And the high-speed operation current collection performance of the spring pantograph is ensured.
Owner:BEIJING CED RAILWAY ELECTRIC TECH

Method for constructing accelerated life test load spectrum of integral dropper

The invention discloses a method for constructing an accelerated life test load spectrum of an integral dropper, which comprises the following steps of: respectively constructing a vibration fatigue load spectrum and a pulse alternating current load spectrum according to simulated fatigue load and current data of the integral dropper, and constructing an accelerated life test load spectrum of the integral dropper after the vibration fatigue load spectrum and the pulse alternating current load spectrum are completed. Performing superposition loading by combining the two, deducing a test loading spectrum of the integral dropper according to a Miner damage principle and an electroplastic effect mechanism, and constructing a fatigue-alternating current impact superposition test loading spectrum; according to the construction method, the action mechanisms of current and mechanical stress are effectively combined on the basis of real working conditions, the working state of the dropper can be reflected more accurately, the actual failure mode of the dropper is better met, the constructed fatigue-alternating current impact superimposed loading spectrum can reflect the stress superimposed effect of the dropper in a complex environment, and the application range of the dropper is widened. By more comprehensively simulating the multi-working-condition environment of the dropper, the reliability of the test result is further improved.
Owner:SOUTHWEST JIAOTONG UNIV +1

Modeling method, device and equipment for sling net blocking system and storage medium

The invention discloses a modeling method, device and equipment for a sling lifting net blocking system and a storage medium. The method comprises the following steps: acquiring working state parameters of a bearing cable under the overhead line crossing construction working condition, and determining an initial bearing cable curve based on a catenary formula, boundary conditions of suspension points on two sides of the bearing cable and the working state parameters of the bearing cable; constructing a finite element analysis model based on the initial bearing cable curve, and determining stress distribution data and deformation data of the bearing cable based on the finite element model; and under the condition that the stress distribution data and the deformation data meet preset engineering requirements, determining the finite element analysis model as a target mechanical analysis model. The technical effects of accurately simulating the stress and deformation of the bearing cable and guaranteeing the construction safety are achieved.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO XUZHOU POWER SUPPLY CO +1

Steel structure progressive collapse-resistant beam column connecting joint

ActiveCN222632512UImprove tensile capacityImproving the structure's ability to resist progressive collapseBuilding constructionsSteel columnsRebar
The utility model discloses an anti-progressive-collapse beam-column connecting joint of a steel structure, and belongs to the field of steel structures. The device comprises an H-shaped steel beam and an H-shaped steel column, the H-shaped steel beam is connected to the two sides of the H-shaped steel column, box-shaped plates are arranged on the two sides of the H-shaped steel column respectively, the box-shaped plates are welded to a web of the H-shaped steel beam and the inner side of a flange of the H-shaped steel beam, reinforcing steel bars penetrate through the two sides of the two box-shaped plates and the flange of the H-shaped steel column, and the two ends of the reinforcing steel bars are connected with nuts in a fastened mode through threads. The box-shaped plates are utilized, the steel bars are connected between the H-shaped steel beams and the H-shaped steel columns, and the box-shaped plates and the steel bars can greatly improve the tension bearing capacity of the beam-column joint, so that a catenary mechanism of the structure can be fully exerted, and the progressive collapse resistance of the structure is improved. The device is simple in structure and convenient to construct.
Owner:中国市政工程西北设计研究院有限公司

Design method and system for stay cable system of cable-stayed bridge and storage medium

The invention discloses a cable-stayed bridge inhaul cable system design method and system and a storage medium. Inhaul cable force and inhaul cable anchoring point coordinates are obtained, and cable-stayed lock and matched component model selection is conducted according to the inhaul cable force and the inhaul cable anchoring point coordinates; according to the model selection result, the section size of the inhaul cable is updated, so that the model selection size meets the design safety coefficient requirement; according to the selected specifications of the inhaul cable and the accessories, the updated cable force is combined, the horizontal distance L0 from the bottom point of a part of the catenary to the lowest point of the full catenary is corrected, and the corrected length s of the inhaul cable is calculated according to the corrected L0. The method is suitable for design of a cable-stayed bridge cable system, programmed automation is achieved, the method is reliable in theory and convenient to operate, and the design efficiency and precision of a cable-stayed bridge can be greatly improved.
Owner:POWERCHINA ZHONGNAN ENG

Tension-leg-like mooring system suitable for shallow-water-depth floating structure

The invention discloses a tension-leg-like mooring system suitable for a shallow-water-depth floating structure. The tension-leg-like mooring system comprises an anchor foundation, a mooring cable, a limiting spring and a suspension weight. The anchor foundation is fixed to the seabed and used for resisting horizontal and vertical mooring force. Three stand columns are arranged on the periphery of the floating body, balance weight cabins are arranged in the stand columns, overhanging weights are arranged in the balance weight cabins in the vertical direction in a sliding mode, limiting springs are installed at the top ends and the bottom ends in the balance weight cabins, one end of a mooring rope is connected with the anchor foundation, and the other end of the mooring rope is connected with the overhanging weights. The phenomenon that the mooring tension is sharply increased due to wave frequency motion of the floating body is avoided, and the problem that the catenary mooring platform with the low pretension design deviates too large is solved.
Owner:HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)