184 results about "Catenary" patented technology

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.

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.

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.

The invention discloses a linear variation stiffness matrix method for suspension bridge space cable forming form finding, relates to the technical field of bridge numerical simulation, and solves the defects of a stiffness matrix in the process of solving the suspension bridge forming form finding through a segmented catenary method. The method comprises the steps that a suspension bridge is simplified into a space cable system composed of a main span, a side span and an anchor span, and the main span, the side span and the anchor span are sequentially subjected to a bridge forming and shape finding process; the linear change stiffness matrix solved in the bridge forming and shape finding process of the main span is used for representing the linear relation between the displacement change of the control point and the initial force change of the main cable; according to the method, an analytical expression of a linear change stiffness matrix is deduced, and an efficient iterative algorithm is established. According to the algorithm, the initial force correction is directly calculated according to the displacement error of the control point in each iteration.

The invention discloses a method for calculating and visualizing the bearing capacity of a power transmission line under extreme meteorological conditions based on GIM and WebGIS. The method comprises the whole process from data analysis to real-time stress monitoring. A three-dimensional model of a power assembly is constructed by analyzing a GIM file of a power transmission line, and the three-dimensional model is exported into a standard format for verification. Meteorological data are collected and processed, meteorological parameter influence coefficients are configured, ultimate bearing capacity is calculated, and stress analysis and safety evaluation are carried out. The space coordinates of the sag conductor are calculated based on the three-dimensional model of the power transmission line, and a real-time conductor model is generated in combination with meteorological data and physical parameters of the catenary. And dynamically updating the state of the power transmission line through a three-dimensional visualization technology in combination with the tower model, the stress data, the lead model and the lead deformation degree, so as to find potential risks in time and take countermeasures. According to the scheme, accurate decision support can be provided for safety monitoring and maintenance of the power transmission line.

The invention provides a power transmission tower and wire safety assessment method and system under the action of avalanche-blast, and belongs to the technical field of power transmission engineering. A power transmission tower is equivalent to a multi-degree-of-freedom cantilever beam structure, a wire is equivalent to a catenary structure, and two working conditions of direct disaster of the power transmission tower and disaster of the wire are divided according to a spatial relationship between an avalanche core and an impact blast and a power transmission system; on the basis of power parameters obtained through avalanche-blast motion simulation, under the working condition that the power transmission tower is directly affected, the power parameters serve as loads to be applied to the power transmission tower model for power response analysis so as to evaluate safety; and under the working condition that the lead is affected, applying the lead as excitation to a lead model to solve lead response and tension, and transmitting the tension to the tower body to evaluate the overall safety of the tower line. According to the invention, comprehensive evaluation of the safety state of the power transmission system under the action of avalanche-blast is realized, and technical support is provided for planning, design and protection of a power transmission line in an avalanche-prone area.

The application discloses a high-speed railway pantograph-catenary arc electromagnetic radiation interference modeling analysis method, constructs a pantograph-catenary arc-pantograph power supply system integrated model containing a traction substation model, a traction network model, a train traction transmission system model, a train-track return current grounding system model and a pantograph-catenary arc model; under a pantograph-off arc transient condition, arc current is obtained through simulation calculation; and based on the arc current, a relationship between arc radiation power and spatial equivalent electric field intensity is established to represent the influence of time-varying characteristics of traction network electrical parameters on pantograph-catenary arc electromagnetic radiation interference. Under the pantograph-off arc transient condition, the real-time changes of impedance and capacitive reactance parameters of the traction network are involved in the unified solution of arc current formation, radiation power evolution and spatial electric field intensity calculation, and meanwhile, key coupling factors of the train high-voltage system and the train-track grounding system are mainly considered, so that the accuracy and engineering applicability of pantograph-catenary arc electromagnetic radiation interference analysis are improved.

This invention discloses a constant tension overhead line guiding device for electrified railway catenary, relating to the field of railway catenary technology. It includes: a high-position mounting frame fixedly connected to a constant tension overhead line vehicle; a mounting plate fixed to the top of the high-position mounting frame; and multiple opposing guide components mounted on the mounting plate. It also includes: a support cylinder rotatably connected to the guide components; an adjusting arm slidably sleeved inside the support cylinder; and a monitoring unit connected to the support cylinder for detecting tilting of cables passing through the guide components. Through the monitoring unit, this invention can detect in real time whether the cables passing through the guide components are tilting. When the cable tilts, it generates a lateral force on the support cylinder, causing the adjusting arm to slide within the support cylinder. Furthermore, by controlling the action of the adjusting unit, the position of the adjusting arm, support cylinder, and guide components is adjusted, achieving real-time correction of the cable's direction.

The application discloses a rigid contact net self-adaptive polishing control method and system, belongs to the technical field of track traffic power supply equipment maintenance, obtains the pantograph-catenary action historical data of each position along the busbar direction of the contact net, and constructs a contact wire damage index distribution curve; based on the damage index, a high damage interval is identified, roughness, corrugation amplitude and oxidation thickness parameters are extracted, a damage intensity vector is constructed, and a fuzzy comprehensive evaluation method is used to calculate the damage level score of each position; according to the scoring results, a preset polishing strategy library is matched, corresponding polishing wheel combinations, rotating speeds and contact pressures are determined, and a control parameter set is generated; the polishing device dynamically adjusts the working state according to the control parameters in the running process, and the method realizes the whole-process self-adaptive closed-loop control of state recognition, strategy decision, execution control and quality feedback of the contact wire polishing operation.

The invention discloses a dynamic correction method, device and equipment for a contact network conductor height measurement error and a medium, and is applied to the field of precision measurement of geometric parameters of a contact network. According to the method, the three-dimensional distortion degree corresponding to the original pull-out value sequence is analyzed, the three-dimensional distortion degree, the vertical acceleration and the pitch angle rate jointly construct a height guide error-distortion degree time sequence correlation model related to the height guide error, then the original height guide sequence is compensated and corrected, and the correction effect is verified. The guide height error-distortion degree time sequence correlation model effectively utilizes the internal stability of a pull-out value, and accurate traceability and measurement of the guide height error are realized; the dynamic adaptive capacity of the model is enhanced through the three-dimensional distortion degree, so that the model can intelligently adapt to changes of complex working conditions, and the robustness and reliability under different line conditions are remarkably improved; according to the method provided by the invention, an acquisition-correction-correction verification closed loop is formed, and the credibility and the accuracy of the contact network detection system are improved.

This invention discloses a method for detecting abnormal states of railway contact wire bolts, comprising: S1, acquiring contact wire bolt state monitoring images and performing cropping preprocessing to obtain image blocks; S2, detecting the preprocessed image blocks to obtain bolt targets; S3, classifying the bolt targets in the image blocks output in step S2 using a classification network to obtain the bolt target state; This invention can quickly and accurately detect abnormal states of bolts, improve the average detection rate of bolt positioning and the average identification accuracy of bolt defects, and reduce manual labor intensity.

The utility model provides an overhead line system composite material cantilever device insulation connector comprising a first insulation double-lug assembly, a second insulation double-lug assembly detachably connected with the first insulation double-lug assembly, and a first locking assembly for locking the first insulation double-lug assembly and the second insulation double-lug assembly. A gap for insertion of a cantilever is formed between the first insulating double-lug assembly and the second insulating double-lug assembly, the second insulating double-lug assembly is provided with a matching through groove, and the inner wall of the matching through groove is provided with a matching through hole; the second locking assembly and the third locking assembly are arranged on the cantilever connecting pin shaft. By adopting the structure, the cantilever connecting pin shaft is fixed by adopting a double-locking structure. Connection is simpler, the angle is freer, and the weight is lighter. The risk of partial discharge of the composite material cantilever device of the overhead line system can be avoided, and the power supply safety and reliability of the overhead line system of the electrified railway are improved.

The invention relates to the field of ship navigation, in particular to a safety analysis method and device for ships connected with elevated cables in waves, electronic equipment and a computer readable storage medium. The method comprises the steps that a ship coupling motion equation set is constructed, and the ship coupling motion equation set comprises force and torque, acting on a first ship and a second ship, of an elevated cable; solving a ship coupling motion equation set based on the set wave data, and obtaining first ship coupling motion data, second ship coupling motion data and elevated cable mechanical data under the set wave data; and determining the safety of the first ship and the second ship based on the first ship coupling motion data, the second ship coupling motion data and the elevated cable mechanical data. According to the safety analysis method and device for the ship connected with the elevated cable in the wave, the electronic equipment and the computer readable storage medium, the technical effect of improving the navigation safety of the ship connected with the elevated cable in the wave can be achieved.

1. Name of the designed product: card holder (arc shape). 2. Use of the designed product: a placing device for mobile phone cards. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention relates to the field of railway construction, and provides a railway contact network bearing wire replacement construction method which comprises the following steps: S1, preparing construction before wire replacement; s11, breaking and dismantling the existing crimping type electric connecting wire clamp, and replacing the existing crimping type electric connecting wire clamp with a bolt type electric connecting wire clamp; s12, the old elastic crane is temporarily dismantled; s13, parameters of the existing anchor section and elastic hoisting tension are comprehensively measured; s14, the anchor section parameters are divided into 30 sections of anchor section supporting column parameters, and the 30 sections of anchor section supporting columns are anchor section supporting columns from the first anchor section supporting column to the third anchor section supporting column; s15, operation vehicle marshalling: marshalling constant tension vehicles according to construction requirements; s16, making a working vehicle operation plan, and moving the working vehicle to a specified anchor section support column according to a No.30 anchor section support column; s2, line changing construction is carried out; S21, a carrier cable is replaced; s22, replacing a contact line; s3, fine adjustment construction; s31, the catenary is finely adjusted; and S4, performing dynamic inspection to recover the normal speed. The method has the effects of formulating the path of the anchor section strut and the operation vehicle and ensuring the operation stability.

The application discloses a test system for simulating seabed disturbance of a steel catenary riser touchdown point fault, which comprises a concrete tank, a riser, a seabed fault simulation device and a riser loading device. The concrete tank is internally formed with a test space. The riser is defined in the test space. The seabed fault simulation device comprises a seabed fault disc, a vertical moving assembly and a horizontal moving assembly. The seabed fault disc comprises a first disc body and a second disc body. The vertical moving assembly enables the first disc body and the second disc body to relatively move along a Z-axis direction, so that a first fault is generated in a seabed soil body. The horizontal moving assembly enables the second disc body and the first disc body to relatively move in an XY plane, so that a second fault is generated in the soil body. The riser loading device adjusts a position of the riser and forms a gully on the soil body. The application can enable the seabed soil body to generate different forms of faults, and further study influences of the seabed fault on gully formation of a riser touchdown point and fatigue life of the riser, so as to ensure accuracy and reliability of the test, and provide a reliable basis for design of the steel catenary riser.

The application discloses a cable system and installation method for sliding installation of a marine photovoltaic module, the cable system comprising load-bearing cables, end beams and a plurality of middle beams arranged in the middle of the end beams, the load-bearing cables being anchored and tensioned on the end beams, the middle beams and the end beams being provided with guide rail type embedding structures capable of enabling the photovoltaic module to continuously slide, the guide rail type embedding structures comprising a bottom plate, a guide rail, a U-shaped buckle and a bolt, the bottom plate being fixed on the middle beam or the end beam, the guide rail being fixed on the bottom plate, the guide rail being arc-shaped, the arc-shaped surface of the guide rail being provided with a semicircular guide groove with the same diameter as the load-bearing cable, the two side surfaces of the guide rail being provided with clamping grooves, the load-bearing cable being embedded in the guide groove and fixed with the bottom plate through the U-shaped buckle and the bolt at the clamping groove position, and the upper part of the U-shaped buckle not being exposed at the clamping groove position. The guide rail type embedding structure is adopted, so that the sliding skid of the photovoltaic module can smoothly slide through the guide rail of the middle beam and the end beam, the photovoltaic module is realized to continuously slide in multiple spans, and the construction efficiency and the construction convenience are greatly improved.

The application discloses a kind of based on three-dimensional point cloud suspension bridge main cable force and sling force fast determination method, system, equipment and medium, comprising the following steps: the main cable and sling of the suspension bridge to be measured are scanned to obtain original point cloud data, after being preprocessed, the main cable section point cloud data and sling point cloud data between adjacent slings are obtained;Cross-section fitting is carried out on the main cable section point cloud data, and the main cable section linear coordinate is extracted;According to the x-axis coordinate of the intersection point of each sling and main cable in the global cartesian coordinate system, the geometric shape parameters of each main cable section are obtained by overall fitting based on the segmented catenary theory according to the main cable section linear coordinate and the x-axis coordinate of the intersection point of sling and main cable;The actual main cable horizontal force is calculated using the unstressed state catenary theory;According to the actual main cable horizontal force and the tangent angle of the main cable at the end point of each main cable section, the corresponding sling force is calculated.The application can accurately determine the main cable force and sling force of suspension bridge.

The invention provides an intelligent operation and maintenance system for a high-speed railway overhead line system based on multi-source data fusion, belongs to the technical field of intelligent operation and maintenance of high-speed railways, and is suitable for scenes such as dropper arrangement optimization, tension detection, model-free robust control and low-noise structure design of the high-speed railway overhead line system. Accurate sensing, intelligent decision making and efficient operation and maintenance of the whole life cycle of the overhead line system can be achieved, technical positioning in the new-generation information technology field is met, locking state testing and self-adaptive adjustment are adopted, the tension measurement error is controlled within + / -1%, and the slippage problem is solved. The disturbance adaptive capacity is enhanced, the contact force standard deviation is reduced by 25% through model-free robust control, stable current collection is still kept under disturbance of the wind speed of 15 m / s, aerodynamic noise is reduced, and the A-weighted sound pressure level drop amplitude reaches 8.59 dB (A) when the wave-shaped cavity structure is 350 km / h.

The application discloses a reverse positioning type arm structure for a catenary, which comprises a horizontal arm and an inclined arm on an arm support, one end of the inclined arm is connected to the horizontal arm through an arm connector, a first support connector in the middle of the inclined arm is connected to a second support connector of the horizontal arm through an arm support, a lower end of the first support connector is connected to a horizontal positioning tube, the other side of the positioning tube is connected to the lower part of the arm connector through a positioning tube support, and positioners on both sides of the lower part of the positioning tube are connected to the lower part of a third support connector in the middle of the positioning tube.

The invention discloses a sag calculation method fusing a single / double-node thermal model and a wind-induced bidirectional effect, and belongs to the technical field of power transmission lines of power systems. The method comprises the steps that firstly, a wire heat-force-wind coupling basic model is built, a wire temperature field is calculated through a single-node or double-node heat model, and equivalent mechanical parameters are calculated based on the layering characteristics of the composite wire; further quantifying the bidirectional coupling relationship of the wind-induced effect, including wind-induced load and convective heat transfer; then establishing a length compatible residual equation, and iteratively solving the horizontal tension and the steady-state temperature by adopting a Newton-Raphson method; and finally, calculating a midspan composite sag and a component thereof based on a catenary theory. According to the method, unified coupling modeling of the temperature effect and the wind-induced effect is achieved, the problems of thermal-force separation and inaccurate parameter description of a traditional method are solved, the sag calculation precision and efficiency are remarkably improved, and an accurate basis can be provided for line safety evaluation under dynamic capacity increasing.

This application relates to the field of processing technology for electrified railway catenary components, specifically disclosing a processing method for a guy wire shell. The method includes six steps: material preparation, initial water expansion, sawing, cutting, final forming, and annealing. The initial forming uses a water expansion mold and a multi-directional hydraulic press to process an intermediate blank. A forming mold and a multi-directional hydraulic press are then used to process the intermediate blank to form the guy wire shell. This technical solution uses a water expansion mold and a forming mold to quickly process a flat tube into a guy wire shell. The hot-press forming technology avoids process defects such as porosity, shrinkage, and stress concentration in the guy wire shell, improving the product's safety performance and quality, and reducing potential safety hazards.

The invention relates to the technical field of rail transit, discloses a pantograph-catenary time history prediction method, device and system and a storage medium, and is used for solving the problem that a pantograph-catenary system state prediction model established in the prior art cannot be compatible with prediction of pantograph-catenary systems under different catenaries. The method comprises the following steps: acquiring current state data and structure parameters of the pantograph-catenary system; inputting the structure parameters into a condition encoder of a pre-trained target GDPINN model for encoding to obtain physical constraint conditions; inputting the current state data into an AttnFNO layer of the target GDPINN model to perform multi-stage Fourier neural operator iteration to extract frequency domain features, and obtaining target frequency domain features; and inputting the target frequency domain feature and the physical constraint condition into a QKV de-noising network layer of the target GDPINN model for de-noising processing to obtain a target pantograph-catenary time history set.

The application discloses a reverse positioning type double-ear type contact net cantilever structure, which comprises a horizontal cantilever and an inclined cantilever connected with a cantilever support, the end of the inclined cantilever is connected to the horizontal cantilever through a cantilever connector, the first connecting seat in the middle of the inclined cantilever is connected to the second connecting seat of the horizontal cantilever through a cantilever support, a positioning pipe is arranged below the first connecting seat, the third connecting seat on the outer side of the positioning pipe is connected to the lower side of the cantilever connector through the positioning pipe support, and the end of the positioner below the positioning support in the middle of the positioning pipe is connected to the lower side of the third connecting seat through a windproof wire. The reverse positioning type double-ear type contact net cantilever structure is adopted, so that the whole structure can be quickly installed, the stability of the structure is improved, and high-frequency vibration is effectively buffered.

The invention relates to a portable deicing device for a high-speed railway catenary, which comprises a cavity, a motor, a coupler, a worm and two turbines are arranged in the cavity, and two gear discs are arranged at the outer bottom of the cavity; the worm is horizontally arranged and is connected to the motor through a coupling; the two turbines are horizontally arranged and engaged to the two transverse sides of the worm; a vertical gear rod is arranged in the center of the turbine, penetrates through a through hole formed in the bottom of the cavity and is inserted into the center of the gear disc. The two gear discs are horizontally arranged and located on the same plane, and a gap is formed between the two gear discs and serves as a wire insertion channel. An ice breaking system with gear cutting as the core is designed, ice covering the wire is cut through the pair of gear discs, layered stripping of an ice layer is achieved, and the purpose of deicing is achieved. Meanwhile, the device is high in integration degree, small in size, convenient to carry, capable of greatly reducing manual operation intensity, thorough in deicing, low in energy consumption and high in efficiency, and has wide economic significance and social significance.

A kind of compensation swing arm moves contact network and operating method, the mobile contact network includes several support structures (3) and force body (1), the force body (1) is driven to be able to move relative to the support structure (3), one or more support structures (3) are directly or indirectly driven to rotate in the process of the force body (1) movement.The mobile contact network can eliminate construction error and the influence of thermal expansion and contraction, prevent support structure rotation not in place.

The invention relates to a kind of multi-wheel chain suspension system suspension function calculation method, and belongs to the technical field of engineering machinery design.The calculation method of the invention is suitable for chain transmission trajectory movement in the same plane;the polygon effect of chain wheel and chain is not obvious, and can be calculated by using the index circle;the chain system presents rigid property and does not occur obvious deformation;the number of chain wheel is greater than or equal to 2;by establishing accurate geometric, mechanical and total length constraint equation set, a closed nonlinear system is formed.After reasonable initial prediction of the lowest point tension of catenary and the direction angle of chain wheel meshing point, the accurate value is obtained by iterative solution.The accurate equation of catenary of each section of chain in the system, the tension distribution along the chain and the sag at any position can be further calculated.The method has high precision and strong universality, can process chain wheel system with any number and arrangement, and provides an effective theoretical calculation tool for the design, tension optimization and state analysis of chain transmission.

The invention discloses a high-altitude wind energy capturing method of a multi-rotor mooring unmanned aerial vehicle, and relates to the technical field of unmanned aerial vehicle control. The high-altitude wind energy capturing method for the multi-rotor mooring unmanned aerial vehicle comprises the following steps that S1, structural environment data and historical operation and maintenance data are preprocessed; s2, performing cable regulation and control and tension wind coupling catenary curve optimization according to a structural turbulent flow risk analysis result, and entering an operation window hierarchical scheduling process; s3, adjusting an included angle between a cable and a main wind direction according to a space coupling effect analysis result, and entering a working window hierarchical scheduling process; s4, executing a job window hierarchical scheduling process according to a risk amplification health suppression evaluation result; and S5, constructing a risk attribution and autonomous evolution optimization mechanism based on the multi-source risk quantitative index. According to the method, multi-stage real-time discrimination of the turbulence risk, the spatial effect and the operation window risk is realized through structural turbulence risk analysis and distributed operation risk analysis in combination with risk amplification health suppression evaluation.

A mooring line (200) comprising a first section (210) for being in an inverse catenary shape under the seabed (20) when installed is disclosed. The mooring line (200) comprises one or more plates (300) connected to the first section (210) of the mooring line (200), the one or more plates (300) comprise a surface area (310) configured for providing a resisting force in a direction perpendicular to the mooring line (200) for keeping the first section (210) in the inverse catenary shape when axial pulling force is applied to the mooring line. A mooring system for an offshore structure (10) is disclosed. The system comprises an anchor member (100) at least partly embedded in the seabed (20) and the mooring line (200). The mooring line (200) further comprises a second section (220) for being subsea, the mooring line (200) extending from the offshore structure (10) to a part of the anchor member (100) embedded in the seabed (20), wherein the one or more plates (300) are connected under the seabed to the first section (210) of the mooring line (200) and are configured to keep the mooring line (200) in an inverse catenary shape.

The application discloses a catenary guide height measurement error dynamic correction method, device, equipment and medium, which is applied to the field of catenary geometric parameter precision measurement. The method constructs a guide height error-distortion degree time sequence correlation model related to the guide height error by analyzing the three-dimensional distortion degree corresponding to the original pull-out value sequence, the vertical acceleration and the pitch angle rate, and then compensates and corrects the original guide height sequence, and the correction effect is also verified. The guide height error-distortion degree time sequence correlation model effectively utilizes the internal stability of the pull-out value, realizes accurate tracing and measurement of the guide height error, and the three-dimensional distortion degree strengthens the dynamic adaptability of the model, so that the model can intelligently adapt to the change of complex working conditions, and the robustness and reliability under different line conditions are significantly improved. The method provided by the application forms a closed loop of acquisition-correction-correction verification, and the reliability and accuracy of the catenary detection system are improved.