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73 results about "Moving load" patented technology
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In structural dynamics this is the load that changes in time the place to which is applied. Examples: vehicles that pass bridges, trains on the track, guideways, etc. In computational models the load is usually applied as: a simple massless force, an oscillator, an inertial force (mass and a massless force). Numerous historical reviews concerning the moving load problem exist (for example,). Several publications deal with similar problems.
Roadbed pavement test and data acquisition system under action of moving load
The invention discloses a roadbed pavement test and data acquisition system under the action of moving load, which comprises the following steps of: acquiring high-precision pavement unevenness data, decomposing features through a space-time convolution variational self-encoding network and inhibiting noise; based on the normal stiffness and the morphological gradient, the density of the sensor is adjusted by adopting dynamic grid division, and multi-modal data is fused by utilizing Bayesian weight. And adaptively extracting signal details by applying multi-scale transformation, and designing a filter to enhance the damage signal and optimize the structure entropy. And constructing a multi-field coupling grid control equation to realize dynamic topological optimization reconstruction. And establishing a damage evolution state space, and training the prediction model through a multi-stage reinforcement learning framework in combination with experience playback. And constructing a digital twin mapping model, integrating Bayesian optimization and reinforcement learning, and establishing a virtual-real feedback channel to realize dynamic decision optimization. According to the invention, innovative improvement on a traditional test method and a data acquisition system is provided, and meanwhile, complex nonlinear dynamic behaviors can be accurately simulated and analyzed.
Owner:ZHONGYUAN ENGINEERING COLLEGE
Reconstruction and extension planning method and system for underpass channel of airport
The invention provides a reconstruction and extension planning method and system for an underpass channel of an airport, and relates to the technical field of airport engineering planning, and the method comprises the steps: generating at least one feasible reconstruction and extension planning scheme based on the geological conditions of a target underpass channel and the non-stop construction constraint conditions of a flight area; establishing a three-dimensional finite element model considering the aircraft moving load effect, performing structural safety verification on the scheme by using the three-dimensional finite element model, and when the scheme does not pass the verification, adjusting related parameters and performing structural safety verification again until the scheme passes the verification; and when the number of the schemes is at least two, constructing a simulation model, simulating the schemes by using the simulation model, calculating the comprehensive influence degree of the schemes on the airport operation efficiency according to a simulation result, and selecting the scheme with the minimum comprehensive influence degree as a first target feasible reconstruction and extension planning scheme. The method can improve the comprehensiveness of the planning result, reduce the whole life cycle cost and potential safety hazards of the project, and improve the airport operation efficiency.
Owner:CIVIL AVIATION AIRPORT PLANNING & DESIGN RES INST CO LTD
Stress analysis method and system based on steel-concrete composite structure of small-and-medium-span bridge
ActiveCN120745238AGeometric CADDesign optimisation/simulationStress distributionArchitectural engineering
The invention relates to a stress analysis method and system based on a small and medium span bridge steel-concrete composite structure, and belongs to the technical field of stress analysis, and the method comprises the following steps: S1, building a finite element parameterized model of a steel-concrete composite bridge; s2, constructing a slippage effect model of a steel-concrete interface based on the constitutive relationship of the steel-concrete composite bridge; s3, applying a moving load working condition, and dividing a load position of the steel-concrete composite bridge through a dynamic grid; s4, solving and correcting the structural stress of the steel-concrete composite bridge; s5, key section stress distribution of the steel-concrete composite bridge is output so as to identify the maximum tension and compression stress area; the method has the beneficial effects that the dynamic change of the load action can be accurately reflected in the model so as to reflect the stress state of the bridge under the actual traffic load; and an accurate structural stress solution is gradually approximated, and a reliable stress analysis result is obtained by comprehensively considering material characteristics, structural geometrical shapes and load distribution factors.
Owner:SICHUAN HIGHWAY ENG CONSULTING & SUPERVISION CO LTD
Dynamic determination method for early warning threshold value of bridge structure monitoring system
The invention discloses a method for dynamically determining an early warning threshold value of a bridge structure monitoring system, and belongs to the technical field of bridge structure monitoring. According to the method, the temperature and structural response data of a bridge are obtained, the structural response data are deflection data or strain data, and the obtained data are divided into the structural response data affected by moving loads and the structural response data only affected by the temperature and not affected by the moving loads; fitting the relationship between the temperature and the strain by using the data only influenced by the temperature, and determining a temperature response baseline according to the real-time temperature and the relationship; according to the data influenced by the moving load, an extreme event responded by the moving load is determined by using generalized Pareto distribution, a current dynamic early warning upper bound value and a current dynamic early warning lower bound value are determined in combination with a temperature response baseline, and early warning is carried out on the bridge state according to the dynamic early warning upper bound value and the dynamic early warning lower bound value. Through the design of multi-factor early warning and a dynamic early warning threshold value, the problem that an existing early warning system is inaccurate in early warning is solved.
Owner:XIAN HIGHWAY INST +1
Method for rapidly evaluating flexural rigidity of bridge under vehicle-induced excitation
The invention discloses a method for rapidly evaluating the flexural rigidity of a bridge under vehicle-induced excitation, and belongs to the technical field of flexural rigidity evaluation of variable cross-section beams. The method comprises the following steps of: firstly, acquiring a bridge time-history response by adopting vehicle movement loading, separating a power component by utilizing a VMD method, then identifying a main frequency of an IMF component through FFT, removing the power component higher than a bridge fundamental frequency, and reconstructing a bridge actual measurement quasi-static time-history response; then, an axle effect in bridge actual measurement quasi-static time history response is eliminated, an influence line recognition model is established, and Tikhonov regularization is introduced to further solve a deflection influence line; then deriving an analytic solution of a deflection influence line of the variable cross-section continuous beam based on a virtual work principle, establishing a mathematical relationship between the flexural rigidity and the deflection influence line, and identifying the flexural rigidity of the bridge through the deflection influence line based on the mathematical relationship to obtain flexural rigidity distribution of the full bridge; finally, multiple evaluation indexes are defined and calculated, the bending rigidity distribution of the full bridge is comprehensively evaluated, and the method has the advantages of being good in engineering applicability and high in safety evaluation innovativeness.
Owner:ANHUI UNIVERSITY OF ARCHITECTURE
Digital twinning implementation method based on mechanical properties of cantilever beam under moving load
PendingCN120145722ADesign optimisation/simulationConstraint-based CADCantilevered beamMechanical components
The invention provides a digital twinning implementation method for mechanical properties of a cantilever beam under a moving load, which is characterized in that mechanical influence distribution of different positions of the cantilever beam is calculated in real time under live load (vector) excitation by utilizing strong form weakening of a differential equation of a mathematical model, and comprises the following steps: S1, obtaining a mechanical component constraint model; obtaining a position function model according to boundary conditions; s2, separating the position equation under the weak formalization; s3, separating the load equation under the weak formalization; and S4, carrying out coupling operation on the position function and the load function which are obtained through order reduction. According to the method, the mechanical distribution condition of the cantilever beam under excitation of different loads can be observed in real time, the calculation speed is greatly increased through model order reduction, and high calculation precision is kept.
Owner:NORTH CHINA ELECTRIC POWER UNIV
Large steel structure installation control method based on dynamic load distribution
The invention relates to the technical field of steel structure construction, in particular to a large-scale steel structure installation control method based on dynamic load distribution, which comprises the following steps of: determining a positioning axis of a building, constructing a steel structure model by combining a plurality of steel structure parts, and arranging a weighing device at each bearing point; determining a gravity center position and constructing a static load model; generating a hoisting load change model by combining the moving load and the wind load; simulating a tension value change curve of each sling in combination with the hoisting load change model, and judging whether each sling reaches a tension critical value or not according to the tension value change curve; sorting the bearing points according to the pre-tension load to generate an installation sequence; recording the mounting sequence and the positions of the auxiliary lifting points corresponding to the bearing points to generate a mounting and fixing mode; according to the method, the influence of dynamic load change on installation in the steel structure installation process is effectively overcome, and meanwhile the stability and safety of large steel structure installation control based on dynamic load distribution are improved.
Owner:CHINA RAILWAY GUIZHOU ENG CORP LTD
Arch bridge damage identification method based on the curvature of the influence line of the thrust of a parabolic variable cross-section arch
ActiveCN115809573BSustainable transportationDesign optimisation/simulationInfluence lineForce method
The present invention discloses an arch bridge damage identification method based on the curvature of the influence line of the arch thrust with a parabolic variable cross-section, belonging to the technical field of arch bridge damage detection. Based on the force method and Ritter's formula, through the setting of the variable cross-section and the fitting of the arch axis shape, a new index - the thrust influence line difference curvature TILDC for reflecting the damage degree of the two-hinged arch structure is proposed. Through the TILDC index, the damage location of the parabolic variable cross-section two-hinged arch structure can be realized, which can be used as the design basis for the strength of the arch seat foundation under the action of moving loads and the theoretical reference for the rapid detection application of arch bridges, verifying the feasibility of using the influence line of the thrust as a damage identification method.
Owner:ANHUI UNIVERSITY OF ARCHITECTURE
Single-axis magnetic gradient detection method and system based on active attitude
PendingCN120405520AAngle measurementMagnetic field measurement using flux-gate principleMagnetic gradientComputational physics
The invention provides a single-axis magnetic gradient detection method and system based on an active attitude, and relates to the field of single-axis magnetic gradient detection.The method comprises the steps that the attitude of a carrier is adjusted according to the magnetic gradient detection requirement; acquiring magnetic gradient information, position information of a carrier and attitude information of the carrier; constructing an inversion equation of active attitude single-axis magnetic gradient detection data; and obtaining three-dimensional magnetic distribution of the detection space by combining the magnetic gradient information, the position information and the attitude information with an inversion equation. According to the technical scheme, a solution can be provided for single-axis magnetic gradient detection of the dynamic load platform, and the detection efficiency and the detection precision are effectively improved by actively utilizing the attitude change information.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Picking device
The present invention relates to a picking device (1) for picking at least one object (4), comprising a support structure, a movable load handling manipulator (2) arranged on the support structure, a handling element (3) arranged on the load handling manipulator (2) for handling the object (4), and a control unit (5) for controlling the load handling manipulator (2) and the handling element (3), wherein the handling element (3) has a vertically displaceable contact element (6) which can be applied to a front side (4-1) of an object (4) facing the handling element (3) and is configured to displace the front side (4-1) of the object (4) along a vertical object axis (8) in order to create a gap (9) below the front side (4-1) of the object (4), wherein the handling element (3) has two displaceable support elements (10, 10-1, 10-2).which are displaceable along a longitudinal axis (11) and along a transverse axis (12), wherein the displaceable support elements (10, 10-1, 10-2) can be attached to a bottom surface (4-2) of the object (4) through the gap (9) created below the front surface (4-1) of the object (4) in order to receive the object (4). The support elements (10, 10-1, 10-2) each have at least two spaced-apart fixing elements (13, 13-1, 13-2, 13-3, 13-4) that can be switched between a fixed state and a non-fixed state. The control (5) is configured to switch one fixing element (13, 13-1, 13-2, 13-3, 13-4) of the two support elements (10, 10-1, 10-2) into the fixed state during a rotation step and to cause a synchronous displacement of the two support elements (10, 10-1, 10-2) along the longitudinal axis (11) and transverse axis (12) in order to achieve a rotation of the object (4) about the vertical object axis (8).
Owner:LINDE MATERIAL HANDLING GMBH
Method and system for planning reconstruction and expansion of airport underpass
The application provides a method and system for planning reconstruction and expansion of an airport underpass, and relates to the technical field of airport engineering planning. The method comprises the following steps: generating at least one feasible reconstruction and expansion planning scheme based on the geological conditions of the target underpass and the non-stop construction constraint conditions of the flight area; establishing a three-dimensional finite element model considering the action of the airplane moving load, using the three-dimensional finite element model to verify the structural safety of the scheme, adjusting the relevant parameters and re-verifying the structural safety of the scheme when the scheme fails to pass the verification, and verifying the structural safety of the scheme until the scheme passes the verification; when the number of schemes is at least two, constructing a simulation model, simulating the schemes by using the simulation model, calculating the comprehensive influence degree of the schemes on the airport operation efficiency according to the simulation results, and selecting the scheme with the minimum comprehensive influence degree as the first target feasible reconstruction and expansion planning scheme. The application can improve the comprehensiveness of the planning results, reduce the whole life cycle cost and safety hidden danger of the project, and improve the airport operation efficiency.
Owner:CIVIL AVIATION AIRPORT PLANNING & DESIGN RES INST CO LTD
Method for forecasting stress and fatigue life of hinged joint of marine emergency bridge under moving load
The invention discloses a method for forecasting stress and fatigue life of an articulated joint of a marine emergency bridge under a moving load. A wave-bridge action numerical model is established in fluid software, and an external drainage basin and bridge motion numerical model is constructed according to computational fluid mechanics (fluid). Finite element calculation is carried out under the same model proportion, and the fluid and the finite element model have the same size and the same position in the coordinate system of the fluid and the finite element model. And constraining the finite element model, and further applying a moving load. And operating the fluid software, and mapping the pressure data of the fluid software to the finite element software. And feeding back the movement of the bridge and the deformation of the joint structure obtained in finite element analysis in the finite element software to the fluid solver through a grid mapping technology so as to update grid data in the fluid solver. By forecasting the deformation of the hinge joint of the marine emergency bridge in a multi-field coupling environment, more accurate reference data is provided for the design of the joint of the marine emergency bridge.
Owner:OCEAN UNIV OF CHINA
Moving load applying method for non-uniform discretization finite element model
The invention relates to a moving load applying method for a non-uniform discretization finite element model, which comprises the following steps: constructing the non-uniform discretization finite element model, determining the node number of each finite element node in the non-uniform discretization finite element model and the corresponding space coordinate of each finite element node, and enabling the unit length acted by the moving load to be in non-uniform distribution; calculating the spatial position of the jth moving load under the ith time step; judging the unit where the jth moving load is located under the ith time step, obtaining the node number of the left node of the unit where the moving load is located under the time step, defining the node number as a track matrix, calculating the distance between the moving load and the left node under the time step, and defining the distance matrix; repeating the steps to obtain a track matrix and a distance matrix of all moving loads in the total time step; and calculating the equivalent node force borne by the left node and the right node of the unit when the moving load acts on the unit. In a full-time-history analysis range, the moving load is dynamically tracked and accurately positioned so as to be accurately applied.
Owner:CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE CO LTD
A method, system, device and medium for simulating Rayleigh surface waves from high-speed railway earthquake sources
The present invention relates to a method, system, device and medium for simulating Rayleigh surface waves of a high-speed railway earthquake source, and belongs to the technical field of numerical simulation of earthquake waves. A high-speed train is a moving line source in a fixed direction. Based on the train moving load model, the loads applied by the four pairs of axles of each carriage to the sleepers under the track are taken as point sources, and the moving line source is decomposed into a superposition of a series of point sources. Considering the elastic effect of the track rails, a time function of the high-speed railway earthquake source is constructed based on the Euler-Bernoulli elastic beam theory. Considering the absorption and attenuation of seismic waves by the underground medium, the staggered grid finite difference method is used to solve the Kelvin viscoelastic wave equation, and at the same time, considering the free surface boundary, the wave field of the earthquake Rayleigh surface wave excited by the high-speed railway moving earthquake source is numerically simulated. It provides the basis and data for the subsequent waveform inversion based on the high-speed railway earthquake source and the inversion of the high-speed railway earthquake source surface wave dispersion curve.
Owner:CHANGAN UNIV
Modular system for reducing mechanical stress with actuation for handling various loads
This product pertains to the field of industry and mechanics, more particularly to means for lifting and moving loads in industrial environments. The present invention relates to a stress reduction module (MR) which is an innovation designed to substantially reduce the stress necessary for moving and lifting loads, adaptable to a wide range of industrial and mechanical environments. This invention comprises an initial actuation device (1) as the primary source of mechanical energy, which can be powered by various sources, such as hydraulic, wind and electric, highlighting its versatility. The initial actuation device (1) is connected to an actuator (2), transmitting energy to a stress reduction device (4), which incorporates multiple interaction points, such as a first point (5), a second point (15), a third point (10) on an L-shaped lever (A), and a fourth point (9). These points are strategically positioned to maximize the efficiency of the system. The third point (10) is coupled to an oscillating support device (12), which, in turn, is connected to an oscillator (8), intensifying the reduction of stress up to the fourth point (9). The stress reduction module (MR) also adapts to maintain constant frequency or initial rotation, optimizing the automatic adjustment of the stress necessary to lift and move loads, which represents a significant advantage over traditional methods, reducing energy consumption and equipment wear.
Owner:SOUSA JOSÉ APARECIDO DE
A modeling method of time-varying moving load in finite element method
The application provides a modeling method of time-varying moving load in finite element method, comprising the following steps: establishing an initial mechanical finite element model of a structure to be calculated, and performing initial finite element mesh division; calculating the radius R of a contact spot between a force application surface and a force receiving surface by using a finite element method; selecting contact points within a width R range along a load moving path, and sequentially renumbering the contact points according to a load action time sequence to obtain finite element mesh nodes; establishing independent unit time load base functions at the finite element mesh nodes; calculating a total load F(t) of the structure at a time t; obtaining a coefficient item in a base function weighting coefficient vector at the time t by using a linear interpolation method; and decomposing the moving load F(t) to a plurality of mesh nodes near the load contact points based on an equation L(t) = f t ·W(t) to obtain a time-varying moving load loading result within a time [0, t1]. The method solves the moving load problem in the finite element environment.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
A method for monitoring the health state of a subway train
The present application relates to the field of state monitoring, especially to a kind of monitoring method for the health state of subway train, by determining track regularity and track stress distribution characteristic value;Calculate the load bearing characteristic coefficient of the opposite track of subway train, determine the change coefficient in combination with the historical track load bearing characteristic coefficient, determine whether the track exists abnormal tendency, determine the processing method;If the track does not exist abnormal tendency, then keep the continuous monitoring state to the opposite track of subway train;If the track exists abnormal tendency, then determine the moving load of subway train, calculate the derailment risk coefficient in combination with the track regularity, determine the derailment early warning state of subway train;In response to the result of subway train derailment early warning state, locate the risk point, determine the risk point and the running distance of subway train, adjust the running speed of subway train;Or determine that subway train needs to be stopped.The present application determines the processing method by monitoring the track operable state of subway train, improves the running efficiency and safety factor.
Owner:BEIJING MASS TRANSIT RAILWAY OPERATION CORPORATION LIMITED
Vertical precast component positioning and installation system and installation method
PendingCN122129139AImprove installation accuracyImprove installation efficiencyBuilding material handlingArchitectural engineeringRebar
This application relates to the field of building construction technology and discloses a vertical precast component positioning and installation system and method. The system includes a moving load-bearing mechanism, a component clamping and flipping mechanism, and a rebar correction and positioning mechanism. The component clamping and flipping mechanism clamps the vertical precast component and drives it from a horizontal transport state to an upright installation state. The rebar correction and positioning mechanism is used to position and correct the upper end of the exposed section of the pre-embedded rebar at the installation location. The rebar correction and positioning mechanism includes a correction bracket and multiple correction claws. In the retracted state, the correction bracket can be inserted into the installation area through the gap between adjacent pre-embedded rebars from one side. In the open state, the multiple correction claws respectively clamp the upper end of the corresponding exposed section of the pre-embedded rebar. After correction is completed, the component clamping and flipping mechanism drives the vertical precast component to descend, aligning the bottom precast hole with the pre-embedded rebar and fitting it in place for installation. This application can improve the hole alignment accuracy and construction efficiency of precast component installation.
Owner:CHINA FIRST METALLURGICAL GROUP
A high-precision bridge moving load identification method
ActiveCN120101913BSustainable transportationWeighing apparatus testing/calibrationInfluence lineDiagonal matrix
The present invention relates to the technical field and discloses a high-precision bridge moving load identification method. The method comprises: calibrating the bridge to obtain the influence line distribution of the bridge; obtaining the load response generated by the monitoring vehicle when passing the bridge, and performing axle weight identification using the Moses algorithm to obtain the initial value of the axle weight; obtaining the contribution diagonal matrix of the load response based on the influence line distribution, the noise signal in the load response, and the axle weight, and obtaining the updated axle weight according to the contribution diagonal matrix combined with the load response and the influence line distribution; repeating the previous step until the difference between the axle weight obtained this time and the axle weight obtained previously is lower than a predetermined threshold, and using the axle weight obtained this time as the axle weight of the monitoring vehicle, thereby solving the problem of low axle weight identification accuracy of existing bridge moving load identification systems.
Owner:HUNAN UNIV OF SCI & TECH
Bridge real-time monitoring method based on double-input self-encoding neural network
The invention relates to a real-time bridge monitoring method based on a double-input self-encoding neural network. The method comprises the following steps: (1) deploying a small number of dynamic vibration sensors at any position of a bridge to collect vibration signals under the action of a moving load; (2) performing spectral analysis on the signal, extracting a fundamental frequency f1 of a bridge structure as a core parameter, and calculating an interception moving window length according to a criterion that a formula l is greater than or equal to 2fs / f1 on the basis of a dynamic relationship between a sampling frequency fs and the fundamental frequency f1; (3) inputting the windowed signal into a dual-channel auto-encoder neural network for training; and (4) realizing structural state judgment by utilizing the trained network, inputting response data to be tested, outputting a corresponding feature vector, calculating to obtain a feature sensitive factor, and judging whether the bridge structure is damaged or not according to a change trend of the feature sensitive factor, thereby realizing real-time structural damage identification under an unsupervised condition.
Owner:DONGGUAN UNIV OF TECH
A modular crossbeam structure for a gantry coordinate measuring machine
This invention discloses a modular crossbeam structure for a gantry coordinate measuring machine, relating to the technical field of coordinate measuring equipment. It includes a modular triangular crossbeam, with a triangular socket at one end and a triangular plug at the other. The triangular plug and socket are fitted together. An inner shaft groove is formed at the center of the triangular plug, and an inner insertion shaft is rotatably mounted at the center of the triangular socket, fitting into the inner shaft groove. This invention employs a three-layer coaxial and concentric connection of the outer triangular profile, a middle locking pin layer, and a central inner insertion shaft, resulting in high joint stiffness, far exceeding that of traditional flange connections. The central inner insertion shaft penetrates the center of both crossbeam sections, forming a composite force transmission system of external triangular bending resistance and internal circular shaft torsion resistance, significantly improving bending, shear, and torsional stiffness. This completely eliminates bending deformation and step errors caused by the self-weight and moving loads of large-span crossbeams, ensuring long-term stability of the guide rail installation reference.
Owner:ZHEJIANG XIONGYING KEFEIDI TECH CO LTD
Dynamic load bridge verification coefficient rapid correction method based on monitoring data
ActiveCN120373144AInternal combustion piston enginesDesign optimisation/simulationLow speedStructural health monitoring
The invention discloses a dynamic load bridge verification coefficient rapid correction method based on monitoring data, and belongs to the bridge structure health monitoring technology. The method comprises the following steps: firstly, extracting dynamic weighing data and bridge measuring point deflection data based on a dynamic weighing system and a deflection monitoring system deployed on a bridge, and analyzing bridge single-vehicle bridge crossing working condition information through the data; then, speed correction is carried out based on vehicle load information, and the speed is used as input of the model, so that a neural network regression model with vehicle weight-vehicle speed as input and single-vehicle bridge deflection variation response as output is constructed; and then, according to the regression model, predicting bridge deflection variation response caused by different vehicle weights when the speed is low, and calculating a dynamic load bridge verification coefficient by adopting a function fitting mode. According to the method, a set of calculation method for the bridge verification coefficient is constructed through monitoring data, the defects that a load test blocks a road and the cost is high are overcome, and rapid calculation of the bridge verification coefficient is achieved.
Owner:JSTI GRP CO LTD +1
Device and method for testing dumping and load of wheeled robot on slope
The invention belongs to the technical field of building robot detection, and particularly relates to a device and method for testing dumping and load of a wheeled robot on a slope, and the device comprises a counter-force beam support frame part which is disposed on a bottom platform and comprises a support oil cylinder used for preventing the robot from dumping left and right and being damaged; the counter-force beam moving load part is arranged at the top of the counter-force beam support frame part and is used for carrying out load test on the robot; the lane support frame part is arranged on the bottom platform and is used for carrying out a toppling test on the robot; and the wheel limiting liftable bottom plate part is arranged on the lane supporting frame part and is used for bearing a robot. According to the device and method for testing the toppling and load of the wheeled robot on the slope, the problem that existing detection equipment is difficult to adapt to wheeled engineering robots of different specifications to carry out slope range tests in which the wheeled engineering robots can safely pass under different load conditions can be solved.
Owner:WUHAN CONSTRUCTION ENGINEERING GROUP CO LTD
Gantry automatic coil unloading device
PendingCN121201987ALoad-engaging girdersBase supporting structuresStructural engineeringMechanical engineering
Owner:YANCHENG KINGWELL INTELLIGENT EQUIP CO LTD
Bridge damage identification method, system, device and medium of multi-scale gaussian filtering residual
This invention discloses a bridge damage identification method, system, electronic device, and storage medium based on multi-scale Gaussian filter residuals. The bridge damage identification method comprises the following steps: acquiring displacement response data of a simply supported beam of the bridge under test under moving load; performing principal component analysis (PCA) on the displacement response data and extracting key principal components using cumulative contribution rate (CCR); using a moving average filter (MAF) to filter out the high-frequency components in the dynamic components and obtaining low-frequency damage mode shapes; then using a Gaussian filter (GF) to simultaneously eliminate high-frequency dynamic components and most of the modal abrupt changes caused by damage, i.e., using a Gaussian function as a weighting kernel to reduce noise in the signal; and by analyzing the filtering residuals of the two filters, introducing an exponential function to amplify local peak values, effectively extracting damage features, thereby completing the structural damage identification and determining its specific location.
Owner:JINAN UNIVERSITY
Force impulse for measuring load stability
Owner:OCADO INNOVATION LTD
Transport system for moving loads on an underlying surface
The invention relates to a transport system (100, 200, 300, 400, 500) for moving loads on an underlying surface, comprising: at least one rail travel path; and at least one transport vehicle (50) which runs on wheels (12, 12A) on the rail travel path, characterised in that: the rail travel path comprises a single rail (10, 312, 314, 412, 414, 512, 514) for receiving the load of the transport vehicle (50); the transport vehicle (50) comprises at least one front wheel (12) and at least one rear wheel (12A) which each rest on the rail (10, 312, 314, 412, 414, 512, 514) one behind the other in the travel direction by means of a running surface (14) having a concave cross-section; and the transport vehicle (50) further comprises support rollers (52A, 52B) which are arranged on both sides of the front and rear wheels (12, 12A) and run on the underlying surface on both sides of the rail (10, 312, 314, 412, 414, 512, 514).
Owner:SIEMPELKAMP TRANSPORT SYSTEMS GMBH
Anti-rotation device and method for lifting, suspending and moving a load
Owner:RTE RESEAU DE TRANSPORT DELECTRICITE
Dynamic response analysis method of piezoelectric hybrid functionally graded sandwich hyperbolic plates
ActiveCN115394384BSustainable transportationDesign optimisation/simulationMechanical engineeringLinearization
The present invention discloses a dynamic response analysis method for a piezoelectric hybrid functionally graded sandwich hyperbolic plate. Taking into account the deformation compensation control effect of the piezoelectric material in the FGM layer, the relevant dynamic equilibrium equations are established based on the constitutive equations of the piezoelectric material regarding the force, electricity, and thermal coupling of stress, strain, electric displacement, and electric field, as well as the relationship between the electric field and potential. The Galerkin method and Newmark-β method are then used to linearize and discretize the motion differential control equations of the piezoelectric hybrid FGM sandwich hyperbolic plate with a wrinkling effect under the action of a moving load. In the numerical results, the relationships between the temperature rise pattern and action range of the nonlinear temperature field, the action form and movement speed of the moving load, the wrinkle morphology and deformation range, the material performance parameters, the structural geometric parameters, the applied voltage, and the active control on the nonlinear dynamic response of the FGM sandwich hyperbolic plate are discussed.
Owner:HUNAN UNIV
Portable and mobile construction crane under load
"Portable and mobile construction crane under load" Portable and mobile construction crane under load (1), referred to as crane (1), comprising a chassis (2, 3) on which are mounted four wheels (230, 240, 330, 340), of which at least two are swiveling, a mast (4) the base of which is mounted swiveling on said chassis, said mast being swiveling, in a median longitudinal plane of the crane, around a transverse axis, a jib (6) fixed on the head of said mast, said jib being swiveling, relative to said head of said mast, around a transverse axis, and sliding, on the head of said mast, along a sliding axis, included in the median longitudinal plane of the crane, adjustable by swiveling said jib. The boom is suitable for receiving a gripping means (7) for a load to be moved (16), or one or more force transmission means (8) intended to support, at least in part, a load to be moved and / or a lifting means (9) for said load to be moved.The crane includes a jack (10), arranged to pivot said mast so as to carry a distal end of said boom cantilevered from said chassis, the base of which is mounted pivotally about a transverse axis distinct from the transverse axis about which the mast pivots, on the chassis; a head is mounted pivotally about a transverse axis on an upper quarter of the mast located on the side of said head of said mast, said jack being pivotable, relative to the mast and the chassis, in the median longitudinal plane of the crane. Figure for the abbreviation: Figure 1.
Owner:BREDIE