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Load test method for beam bridge based on time history curve
The application belongs to the technical field of bridge construction, and is a beam bridge load test method based on time history curve. The method firstly carries out static load test, and then arranges test vehicles at key parts of the test bridge surface by using a step loading mode, and measures deflection points and strain points. Then, the static load test efficiency is calculated through the bridge static load test. According to the step loading mode and the static load test efficiency, a multi-working-condition bridge model is established by using a finite element method to collect time history curves. Finally, dynamic load test is carried out, control sections of each span of the bridge are selected as test sections, and strain fluctuation amplitude, impact coefficient and the like are measured through the dynamic load test. According to the test data, the stress state of the structure under dynamic load is analyzed. The application combines static load test and dynamic load test, can reflect the working performance of the bridge structure under design load, and has high reliability.
Owner:GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD +1
Numerical simulation method for corrosion rate of high-strength steel under marine stress environment
PendingCN122333897AAccurate deductionaccurate predictionElectrochemical responseEngineering structures
This invention discloses a numerical simulation method for the corrosion rate of high-strength steel under marine stress environments, belonging to the field of corrosion and protection technology. The method includes the following steps: establishing a geometric model for simulation and meshing the model; setting material properties, including corrosion kinetic parameters and basic mechanical property parameters; applying boundary conditions to the geometric model to simulate the actual stress state of the high-strength steel plate; formulating a kinetic expression formula for the electrochemical reaction to describe the electrochemical behavior during corrosion; and performing a corrosion kinetic-mechanical coupling analysis to calculate the distribution of corrosion current, corrosion potential, and local corrosion rate. This invention, by constructing a multiphysics model, can accurately extrapolate and predict the dynamic corrosion rate of high-strength steel under different stresses and environmental parameters. It provides crucial theoretical basis and data support for the design, life assessment, and maintenance decisions of marine engineering structures.
Owner:NANJING IRON & STEEL CO LTD
A weldment strength testing apparatus
ActiveCN224327996UMaterial strength using tensile/compressive forcesStressed stateUltimate tensile strength
The utility model relates to welding piece strength test technical field, concretely is a kind of welding piece strength test device, the fixed subassembly includes four connecting pieces, four the connecting pieces are fixedly connected in the top of fixed frame respectively, the inside of four the connecting pieces is fixedly connected with fixed bottom plate jointly, recess is set up in the inside of fixed bottom plate, four sliding grooves one are set up in the inside of fixed bottom plate. This welding piece strength test device, can guarantee that welding piece is in correct stress state in testing process, avoid the uneven partial stress, sliding or rotation etc. caused by clamping instability, to make the test result real reflection welding piece's strength performance, reduce test error, improve the reliability and repeatability of data, need not frequent adjustment clamp or reinstallation welding piece, can reduce test preparation time and the test interruption frequency caused by clamping problem, make testing process more smooth, to improve overall test efficiency.
Owner:SUZHOU AUHYNE ELECTRONICS CO LTD
Sheet metal inner corner fatigue test device and sheet metal inner corner fatigue test method
PendingCN122171360AMaterial strength using repeated/pulsating forcesStressed stateMechanical engineering
This invention belongs to the field of sheet metal testing technology, and discloses a sheet metal internal angle fatigue testing device and method. The sheet metal internal angle fatigue testing device includes a testing platform, a fixing component, and a pressure applying component. The fixing component includes two blocks and corresponding sliders. The two blocks are adjustablely mounted on the testing platform along a first direction, and the two sliders are slidably mounted on the testing platform along the first direction and located between the two blocks. Both sides of the sheet metal part along the first direction are fixedly connected to the sliders. The pressure applying component is connected to the testing platform and includes a pressure head. The pressure head is used to apply pressure along a second direction to the outer side of the bending angle of the sheet metal part. This accurately simulates the movement characteristics of the sheet metal parts' sides during actual working conditions and the true stress state of the internal angle, ensuring the accuracy of the test results. It is adaptable to the testing needs of different models and specifications of sheet metal parts, and has a wide range of applications and strong versatility.
Owner:SHANGHAI AIRCRAFT MFG
Construction process of precast and erection of double-track widened simply supported box girder at single and double parallel sections
This invention discloses a prefabrication and erection construction process for a double-track variable-width simply supported box girder at a single / double-track junction, relating to the field of construction technology. The process includes obtaining the geometric parameters and spatial constraints of the double-track variable-width simply supported box girder at the single / double-track junction; adaptively modifying the prefabrication beam formwork system and supporting fixtures based on the geometric parameters; calculating the stress state of the box girder structure and implementing prefabrication parameter control during the prefabrication stage; completing the prefabrication, tensioning, and curing of the box girder based on the calculation results; and controlling the stress state under the action of the bridge erecting machine and completing the erection of the box girder during the erection stage. This invention achieves precise prefabrication and safe erection of the double-track variable-width simply supported box girder by parametrically obtaining the box girder's geometry and track conditions, combined with adaptive formwork modification and stress calculation threshold control. It also effectively diverts asymmetrical loads during the erection stage, reducing construction risks, shortening the construction period, and improving project quality and construction safety.
Owner:CHINA RAILWAY FIFTH BUREAU GRP SOUTH CHINA ENG CO LTD +1
Inlay and method for inlaying a decorative component
One aspect of the invention relates to a setting (1) comprising an upper body (15) and a lower body (16) aligned along an axis (A) for driving the setting into a seat (8) of a piece of jewelry or timepiece (9), the upper body (15) comprising a first surface (2) to receive a component (10) to be set, the upper body (15) comprising a setting element (4) to ensure retention of said component (10), the lower body (16) comprising a second surface (6) facing forward, a deformable zone (7) being plastically deformable between the bodies (15; 16) under the effect of an axial driving force greater than a predetermined driving force, to bring the setting (1) into a stressed state in which the deformable zone (7) irreversibly deforms and / or breaks in the form of a rim of the peripheral surface (3) of the setting (1) pushed back radially towards a side wall of the seat (8), or / and a fault of the upper body (15) pushed back radially towards this side wall.
Owner:DECORATE THE CO FOR YOU
A method for predicting the bending resistance of a large-span multi-rib concrete composite slab
The application relates to a method for predicting the bending performance of a large-span multi-rib concrete composite slab, which comprises the following steps: S1: constructing a space rectangular coordinate system of the large-span multi-rib concrete composite slab, and restraining the physical properties of the large-span multi-rib concrete composite slab; S2: constructing a shear lag effect displacement function of the large-span multi-rib concrete composite slab according to a shear lag control equation derived based on the minimum potential energy principle; S3: deriving a bending balance equation based on the shear lag effect displacement function and the minimum potential energy principle, and constructing a bending performance prediction model of the large-span multi-rib concrete composite slab considering the shear lag effect based on the bending balance equation. The bending moment of the large-span multi-rib concrete composite slab can be predicted through the bending performance prediction model, so that the deflection and stress state of the composite slab under the service load can be more accurately evaluated.
Owner:HUNAN UNIV OF SCI & TECH
Method for installing rubber flashing at intersection of deformation joint and construction joint
This invention discloses an installation method for a rubber waterstop at the intersection of an expansion joint and a construction joint, belonging to the field of building construction technology. It aims to solve the technical problem in existing technologies where, during installation at the intersection of an expansion joint and a construction joint, it is difficult to accurately control the initial stress state of the rubber waterstop in the direction of the expansion joint, leading to tearing or loosening and failure of the waterstop when the expansion joint expands or contracts. Key technical points include: determining the pre-tension amount δ based on the maximum possible expansion displacement Δ of the expansion joint, where δ = k·Δ, and k is a relaxation coefficient of 0.2 to 0.5; during installation, first fixing the bottom end of the waterstop, then applying tension to its top end using a tensioning device to achieve the pre-tension amount δ; then, for the waterstop, setting positioning bars to connect its flanges to the structural steel reinforcement; and finally, pouring concrete. This invention is mainly used for the installation of waterstops at the intersection of building expansion joints and horizontal construction joints, ensuring that the waterstop maintains a moderate tension within the joint.
Owner:BISHUIYUAN CONSTRUCTION GROUP CO LTD
Method for calculating depth of ice body bearing working area under vertical concentrated load
PendingCN122154304ADesign optimisation/simulationComputational materials scienceClassical mechanicsStrain energy
The application discloses a kind of ice body bearing working area depth calculation method under vertical concentrated load action, it is related to ice body bearing capacity analysis technical field. Including steps: S1, establishing ice body damage evolution model, the ice body damage evolution model in the S1 is established, specifically includes: S11, introducing the damage variable D related to ice body stress state and loading rate, the value range of the damage variable D is 0 to 1, wherein 0 indicates that the ice body material is not damaged, 1 indicates that the ice body material completely loses bearing capacity.The application establishes the damage evolution model related to ice body stress state, loading rate, introduces damage variable and determines its evolution rate, quantitatively describes the microcrack initiation and propagation of microcosmic progressive crushing behavior, makes up the defect that traditional method ignores this behavior;Again, the correlation model of energy dissipation and bearing working area depth is reconstructed, the bearing working area is defined, and the balance relationship of total input energy, elastic strain energy and damage dissipation energy is established.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT +2
Construction method for long-distance and large longitudinal slope steel trough beam bidirectional incremental launching closure
The application discloses a long-distance large longitudinal slope steel trough beam bidirectional incremental launching closure construction method, and is used to solve the problems of high incremental launching support pier and large closure additional stress in the prior art. The incremental launching assembling platform is erected on the middle pier of the bridge, the first and second main beams are formed by bidirectional incremental launching to the two sides respectively, and the closure section space is reserved. When the closure is performed, the closure section steel beam is welded and fixed with one side main beam, and the temporary hinged bracket is installed on the other side to form a temporary hinged structure; then the temporary support is removed, the main beam is deformed freely under the action of the dead weight to release the residual stress; finally, the other side ring opening welding is completed, and the hinged bracket is removed. The application avoids the risk of high support pier through bidirectional incremental launching, effectively eliminates the additional stress after closure through the closure process of 'hinged + stress release', makes the stress state of the completed bridge consistent with the design, has high linear control precision, is safe and reliable in construction, and is especially suitable for the construction of large longitudinal slope long-distance steel trough beam bridges.
Owner:CCCC SECOND HARBOR ENGINEERING CO LTD
A test sliding hinge support and test apparatus
The utility model belongs to test equipment technical field, specifically discloses a kind of test sliding hinge support and test equipment.The utility model's test sliding hinge support, its application in test equipment, long-distance sliding function is realized by sliding block sliding cooperation linear slide rail, rotating shift realizes rotating function by rotating platform relative to rotating support frame rotation shift, effectively reduce the frictional resistance of sliding, rotating process, can better simulate structure boundary real stress state, improve test accuracy;During test process, by clamping block and linear slide rail abut, lock between sliding block and linear slide rail, to realize the flexible switching of "sliding+rotating" boundary condition and "rotating" boundary condition, can be widely applied to structure model test, loading test, bridge teaching test scene.
Owner:WUMI TECH (QINGDAO) CO LTD
Rapid early warning and estimation method for structural state of continuous rigid frame bridge based on long-term deflection change
PendingCN122366045AAccurately predict deflection development trendsAbnormally rapid structural deformationStructural deformationStructural health monitoring
This invention discloses a rapid early warning and estimation method for the structural state of prestressed concrete continuous rigid frame bridges based on long-term deflection changes, belonging to the field of bridge structural health monitoring and assessment technology. This method involves setting up permanent observation points during the operation of the continuous rigid frame bridge to collect long-term deflection data and establish a deflection characteristic equation. Combined with the prestress-deflection and main beam stress-deflection regression relationships, it achieves dynamic calculation of the structure's prestress and stress state. Simultaneously, it sets early warning thresholds based on deflection development trends to provide rapid early warning of abnormal structural deformation and completes the serviceability limit state and ultimate limit state assessments according to current standards. This invention solves the problems of reliance on short-term data, delayed early warning, and inaccurate state estimation in traditional bridge assessments. It achieves long-term dynamic tracking and accurate prediction of structural state, providing a scientific basis for bridge maintenance decisions and is applicable to the health monitoring and performance assessment of continuous rigid frame bridges during the operation period.
Owner:YUNNAN HIGHWAY SCI & TECH RES INST
A method for predicting failure of composite materials based on mohr theory
PendingCN122245568AMaterial strength using tensile/compressive forcesMaterial strength using steady shearing forcesCompressive strengthStressed state
This invention discloses a composite material failure prediction method based on Mohr's theory. The method includes: obtaining three basic strength values of the composite material: transverse tensile strength, transverse compressive strength, and longitudinal shear strength; constructing a matrix failure function based on Mohr's theory, assuming that matrix failure is determined by stress components on its potential fracture surface; deriving coefficient relationships through a transverse isoaxial loading assumption, and determining undetermined coefficients through longitudinal shear, transverse compression, and transverse tensile loading; distinguishing between brittle and semi-brittle materials based on the ratio of transverse compressive strength to transverse tensile strength; for a given stress state, calculating the maximum value of the failure function and its corresponding angle, determining whether matrix failure has occurred, and predicting the fracture surface angle. This invention requires only three basic strength values, eliminates the need for empirical parameters, has a unified expression, and is applicable to both brittle thermosetting and semi-brittle thermoplastic composites, exhibiting high prediction accuracy.
Owner:CHINA AIRPLANT STRENGTH RES INST
A bearing clearance control method, device, equipment and readable storage medium
The application relates to the technical field of rolling equipment, and discloses a bearing gap elimination control method, device, equipment and readable storage medium, which comprises the following steps: obtaining working condition data reflecting the stress state of a working shaft of a rolling equipment during operation; constructing a mechanics balance model by using the working condition data, and calculating the supporting reaction force data of a main bearing according to the mechanics balance model; determining the minimum gap elimination control force required for realizing gap elimination according to the supporting reaction force data and a preset gap elimination determination condition; generating a control instruction based on the minimum gap elimination control force, and sending the control instruction to an executing mechanism to adjust the gap elimination control force applied to the working shaft. The application can automatically match appropriate gap elimination control forces under different working conditions, avoids the situations of insufficient gap elimination and excessive gap elimination, realizes more stable and controllable bearing gaps, reduces abnormal wear and impact, and improves the operation stability and service life of the rolling equipment as a whole.
Owner:QINGYAN NACO INTELLIGENT EQUIP TECH (SHENZHEN) CO LTD
Method and system for determining yield surface of an automotive deep drawing steel
PendingCN122259334APreparing sample for investigationMaterial strength using tensile/compressive forcesAnisotropic deformationYield surface
The application provides a kind of automobile deep drawing steel yield surface determination method and system, it is related to the technical field of mechanics test yield surface determination, it aims at solving the defects that traditional uniaxial tensile test cannot reflect the anisotropic yield behavior of deep drawing steel.The method adopts the technical scheme of uniaxial tensile test combined with cross-shaped biaxial tensile test: prepare uniaxial tensile test sample in rolling direction and perpendicular to rolling direction and cross-shaped biaxial tensile test sample; obtain real stress-real plastic strain curve and plastic work under different plastic strain by uniaxial tensile test; load different proportion of biaxial tensile test on cross-shaped test sample, obtain biaxial stress-strain data; based on the principle of equivalent plastic work per unit volume, back-calculate the stress value corresponding to each loading proportion, draw yield locus curve.Precisely characterize the yield surface evolution law and anisotropic deformation behavior of deep drawing steel under complex stress state.The automobile deep drawing steel yield surface determination system is applied to the automobile deep drawing steel yield surface determination method.
Owner:INNER MONGOLIA BAOTOU STEEL UNION
A strength testing device for steel-wood composite joints
This utility model relates to the field of strength testing technology for steel-wood structures, and discloses a strength testing device for steel-wood composite joints. The device includes a frame, with a first displacement module at the lower end of the frame, and a sliding displacement frame mounted on the outer surface of the frame. This strength testing device for steel-wood composite joints uses an angle motor to drive a switching disk to rotate, enabling rapid switching between contact seats of different shapes and equidistant distributions on its lower surface. This allows for adaptation to the contact requirements of different structures, such as glued laminated timber (GLLT) splice joints, GLLT support joints, and GLLT-steel truss web member connection joints. For example, for rebar connection joints, contact seats adapted to the rebar distribution area are selected to simulate the collaborative stress of the rebar and the wood holes. For bolt-steel insert plate connection joints, contact seats adapted to the steel insert plate plane or bolt countersunk holes are selected to ensure a tight fit at the contact interface, avoid stress transmission distortion, and improve the simulation accuracy of the actual stress state of the joint.
Owner:CHINA RAILWAY NORTHEAST INVESTMENT DEV CO LTD +1
A cubic press with back bending and a method for dynamically adjusting the position pressure of a top hammer
The application discloses a back-bending type cubic press and a top hammer position pressure dynamic adjusting method, relates to the technical field of superhard material synthesis equipment, and comprises the following parts: two groups of end face racks; four groups of side face racks, which are matched with the two groups of end face racks and jointly form the overall rack structure of the back-bending type cubic press; a displacement sensor, which is arranged at the middle part of the outer side of the end face rack and the side face rack and is used for collecting displacement data of the end face rack, the side face rack and a hydraulic cylinder; the hydraulic cylinder, which is arranged at the middle part of the inner side of the end face rack and the side face rack and provides hydraulic power output for the pressing operation of the back-bending type cubic press; and a hinge beam shape correcting mechanism, which is arranged at the outer side of the side face rack and is used for correcting the deformation of the side hinge beam of the side face rack. The beam body in the application adopts a unique back-bending type structure design, and a method for real-time and collaborative dynamic adjustment of the top hammer position and the applied pressure during the pressing process is provided, so that the beam body is always in the optimal stress state.
Owner:YANSHAN UNIV
A deformation coordination structure adapting to misplacement of upper and lower structure deformation joints and a construction method thereof
This invention discloses a deformation coordination structure and its construction method for adapting to misalignment of expansion joints in upper and lower structures. It relates to the field of airport construction technology and includes a lower concrete structure, a large-span steel grid and metal roof, vertical keel, curtain wall glass, upper expansion joint, lower expansion joint, upper steel beam, steel grid ball joint, upper cantilevered steel beam of the curtain wall, steel corbel, first deformation zone, and second deformation zone. The beneficial effects of this invention are: by setting up the cantilevered steel beam as an active deformation coordination component, it fundamentally solves the problem of systemic deformation incoordination in the enclosure system caused by misalignment of expansion joints in the upper and lower structures of large-span public buildings. Its structure is clear and its force transmission is well-defined; through precise design, the cantilevered steel beam completes deformation coordination within the elastic range, and the stress state of the component is known and controllable, significantly improving the structural safety and reliability.
Owner:CHINA CONSTR THIRD ENG BUREAU GRP CO LTD +1
Steel frame-composite lateral force resisting structural system and method of assembly
The present application relates to steel frame assembly technical field, and disclose a kind of steel frame-combination lateral force resisting system and assembly method, a kind of steel frame-combination lateral force resisting system assembly method, comprising: step S1, foundation positioning and support installation;Step S2, main frame hoisting;Step S3, transverse beam installation and node splicing fixed;Step S4, repeat installation and expand to full-span structure;Step S5, final fastening and acceptance detection.The present application follows the logic of "first welding flaw detection, then load test, finally glue sealing", to prevent hidden works "sealing with disease";Modified epoxy resin is injected under equivalent static load stress state, fill micro gap, form prestressed occlusion after unloading, realize excellent "reinforcement under load" and fatigue resistance, last glue emptying air before acceptance, maximum limit reduce water vapor residue, achieve real air-tight long-term corrosion protection.
Owner:CHINA RAILWAY URBAN CONSTR GRP THE 1ST ENG CORP LTD +1
A high-strength channel steel structure
Owner:SHANGHAI KALZ CONSTR TECH CO LTD
A kind of disc spring device and disc spring compression performance prediction method
The application provides a disc spring device and a disc spring pressure performance prediction method, and relates to the technical field of disc springs. The conical surface of the disc spring body is provided with a stress release groove extending in the radial direction. The upper surface of the disc spring body is provided with an annular groove, and a flexible strain sensor is embedded in the annular groove. The flexible strain sensor is electrically connected with the data acquisition and processing unit and is used for collecting and processing strain signals. The application sets a radial stress release groove on the conical surface of the disc spring body, and a circular arc structure is used for the groove bottom to eliminate sharp corner stress concentration. From the structural design level, the early fatigue crack problem caused by stress concentration on the inner edge upper surface of the traditional disc spring is solved. At the same time, the stress state is monitored in real time through the flexible strain sensor, real-time data support is provided for performance evaluation, and the service life and operation reliability of the spring are significantly improved.
Owner:DONGTAI JINZHIZE METAL PROD CO LTD
A ct150 grade steel for sour service coiled tubing and method of manufacture
The application discloses a CT150-grade acid-service continuous tubing steel and a manufacturing method thereof. By precisely controlling the content of C (0.19-0.21%) as a main strengthening element, the use amount of valuable alloy elements such as Ni, Nb, Mo and V can be appropriately reduced, and a refined collaborative manufacturing process including a'slag-remaining + double-slag' deep dephosphorization, low-temperature superheating continuous casting and dynamic soft reduction, four-stage slab heating, controlled rolling and controlled cooling and quenching and tempering is combined. The yield strength is 1050-1150 MPa, the tensile strength is 1250-1350 MPa, the yield strength ratio is less than or equal to 0.85, the elongation A after fracture is greater than or equal to 14%, the Charpy V-type notch impact energy KV2 at -40 DEG C is greater than or equal to 150 J, and the Rockwell hardness is less than or equal to 38 HRC. The steel has very high strength, good plasticity, deformation capacity and low-temperature toughness, can be safely used under a complex stress state in a deep well and brittle fracture can be avoided.
Owner:武汉钢铁有限公司
A drilling rig drawworks test stand
The present application relates to the technical field of drilling winch testing, in particular to a drilling winch test bed, comprising: a guide mechanism arranged on the upper side of the bottom plate and located at the rear side of the winch body, a load mechanism and an impact mechanism arranged on the guide mechanism; the present application can simulate the complex dynamic load generated by the mine resistance, the drill bit itself shaking and the superposition of the two in the process of simulating the drill bit lifting, more truly reproduce the sudden impact and composite stress state of the winch in actual operation; can implement the continuous and effective safety protection of the weight during the static load test of the winch, avoid the risk of high falling of the weight caused by the fracture of the steel cable or the brake failure; at the same time, the winch can also be applied to the continuous linear change of the load, so as to obtain the performance curve of the winch in the process of load change, and provide reliable basis for accurate evaluation of power output characteristics and overload allowance.
Owner:SHANXI PROVINCE TENGFEI PETROLEUM ELECTROMECHANICAL NEW TECHNO
A prestressed concrete bridge rapid evaluation method based on elastic modulus
The application discloses a prestressed concrete bridge rapid evaluation method based on elastic modulus, and belongs to the technical field of bridge engineering nondestructive testing and health monitoring. The method first selects a key test area and a load working condition according to bridge stress characteristics; subsequently, adopts an impact elastic wave technology to test a tangent elastic modulus of concrete on site; further, inverses actual stress levels of the structure through elastic modulus changes based on a concrete constitutive model, and identifies damage states in combination with wave speed analysis; finally, compares measured stress levels with design values, and comprehensively considers damage conditions, so that rapid grading evaluation of bridge bearing capacity and safety conditions is realized. The application realizes rapid, nondestructive and quantitative evaluation of the prestressed concrete bridge, overcomes the limitations of high cost, long cycle or difficulty in reflecting overall stress states of traditional methods, and is suitable for conventional screening, emergency evaluation and on-site calibration of a health monitoring system of the bridge.
Owner:Qinghai Vocational and Technical University +2
A method for quickly determining fixture factors of gearbox shell bearing hole roundness out-of-tolerance
This application discloses a rapid method for determining fixture factors causing out-of-tolerance roundness of bearing holes in gearbox housings, relating to the field of machining error diagnosis technology. The method includes: positioning and clamping the gearbox housing blank to be machined and performing machining; maintaining the workpiece in a closed clamping state to obtain hole diameter data at a specified cross-section and calculating a first roundness parameter; releasing the constraint and allowing it to stand still, obtaining hole diameter data at the same cross-section and calculating a second roundness parameter; comparing the two roundness parameters with the design roundness tolerance threshold; and, based on the compliance status of the first and second roundness parameters, and the comparison result of their difference with the deformation threshold, determining and outputting diagnostic results for single fixture-related causes, single machine tool faults, or coupled faults between the machine tool and fixture. This invention utilizes physical measurement comparison of the same workpiece under different stress states to decouple inherent errors from fixture clamping deformation errors, avoiding blind trial cutting for troubleshooting and improving the accuracy and efficiency of fault cause localization.
Owner:FAW QI NEW POWER (CHANGCHUN) TECHNOLOGY CO LTD
Crane welded structure stress distribution simulation and evaluation method
This invention relates to the field of crane welded structure analysis technology, specifically a method for simulating and evaluating stress distribution in crane welded structures. The method includes: collecting design parameters and service load data such as weld geometry, material properties, and working load spectrum; constructing a parametric finite element model containing a refined mesh of the weld region based on this data; performing nonlinear stress analysis on the model using a stress distribution solver to obtain stress distribution characteristics including stress concentration factors, stress gradients in the heat-affected zone, and overall stress cloud diagrams; performing multi-criteria strength evaluation on the stress distribution characteristics to generate a strength safety factor and identify potential failure areas; and automatically generating a set of structural optimization suggestions, including weld shape optimization and stiffener layout adjustment schemes, based on the evaluation results. This invention achieves accurate quantification and evaluation optimization of the stress state of welded structures in a closed loop, improving the reliability and efficiency of crane structural design.
Owner:HENGHE (YANTAI) DIGITAL TECH CO LTD +1
A kind of impact testing device for mining high-strength chain
The utility model discloses a kind of impact test devices for mining high-strength chain, it is related to chain testing technical field, it includes test box, both side walls of the test box are equipped with suspension plate, and the opposite surface of two suspension plates is equipped with multiple hooks, and the side of two suspension plates and test box side wall corresponds is connected with three butt columns, the both side walls of the test box are equipped with several butt holes, and suspension plate is fixed in the side wall of test box by the connection of butt column and butt hole. Through the combination design of annular distribution butt hole and center butt hole, suspension plate can be quickly adjusted to be installed horizontally, vertically or obliquely, simulate the stress state of chain under different working conditions in pit flexibly, improve the accuracy and engineering applicability of test result, the modular design of hook and suspension plate supports the installation of different specifications chain, adapts diversified test scene, while impact hammer is equipped with weight block that can be increased or decreased, can adjust impact energy according to test requirement.
Owner:SHAANXI YANGXIN COAL MINING MASCH MFG CO LTD
A prestressed steel support axial force loss intelligent compensation and real-time monitoring system
The application provides a prestressed steel support axial force loss intelligent compensation and real-time monitoring system, which is provided with a collection module, a preprocessing module, an analysis module, an intelligent compensation module, a real-time monitoring display module, an alarm module and a storage module; the system collects axial force data, temperature data and stress and strain data of the prestressed steel support in real time through the installed collection module, processes the data through the preprocessing module, then performs filtering processing and outlier elimination through the preprocessing module, and the analysis module performs deep analysis processing and calculates the actual stress state of the steel support; when the prestressed support axial force needs to be adjusted, the intelligent compensation module automatically adjusts the prestress of the prestressed steel support to realize intelligent compensation of the axial force loss; the real-time monitoring display module intuitively displays the preprocessed data and the working state of the intelligent compensation module to the user; the alarm module timely sends an alarm signal when the axial force loss exceeds a preset threshold or the system appears abnormal.
Owner:SHANGHAI BAOYE GRP CORP