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49 results about "Residual deformation" patented technology
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English English. patents-wipo. The residual deformation of the two plates is the same and, due to the relative arrangement of the plates to form the flow field plate assembly, the deformation of one plate is compensated for by the residual deformation of the other plate.
Self-resetting energy dissipation damping device for anti-seismic support of bridge
InactiveCN120867191AClimate change adaptationBridge structural detailsResidual deformationEnergy control
The invention relates to the technical field of bridge damping devices, in particular to a self-resetting energy dissipation damping device for a bridge anti-seismic support. Comprising a damping assembly and a steel member, and the damping assembly comprises a cover plate, a locking screw rod, an elastic piece and a core body; the two cover plates are oppositely arranged and connected through a plurality of locking screws, the two ends of each locking screw make contact with the cover plates through elastic pieces, a containing space is formed between the two cover plates, the core bodies are arranged in the containing space in pairs and are in sliding connection with the locking screws, and one end of each core body is fixedly connected with a steel member; through a graded energy dissipation mechanism and a self-resetting function, energy input by an earthquake can be effectively dissipated, structural response can be controlled, damage can be reduced, residual deformation can be inhibited, the anti-seismic adaptability and post-earthquake recovery capability of a bridge structure can be remarkably enhanced, and the bridge safety requirements under multiple earthquake magnitudes and multiple working conditions can be met.
Owner:QINHUANGDAO ROAD&BRIDGE CONSTRUCT DEV CO LTD +2
Multi-angle self-adaptive collision assembly type energy dissipation stop block
ActiveCN223853153UClimate change adaptationBridge structural detailsResidual deformationClassical mechanics
The utility model relates to the technical field of bridge anti-seismic check blocks, in particular to a multi-angle self-adaptive collision assembly type energy dissipation check block which comprises a U-shaped plate, a front plate, an outer back plate, an inner back plate, springs, cushion blocks, energy dissipation soft steel, stiffening ribs and bolts. The front plate and the inner back plate are connected through a plurality of springs, the springs are installed between the cushion blocks, the cushion blocks are welded to the inner faces of the front plate and the inner back plate, the U-shaped plate is connected to a cover beam in an assembled mode, and the outer back plate is installed on the side, away from the cover beam, of the top of the U-shaped plate. The outer back plate and the inner back plate are connected through a plurality of pieces of energy dissipation soft steel. The whole energy consumption stop block is connected to the bent cap through the bolts, and later maintenance and replacement are facilitated. After the earthquake action is finished, the restoring force of the spring can push the main beam to reset, the post-earthquake residual deformation of the main beam is reduced, the bridge repairing difficulty is reduced, and the device has the advantages of being clear in structure, clear in stress, comprehensive in performance, economical in cost, capable of being assembled, easy to repair and the like.
Owner:NANCHANG UNIV
Method for optimizing forming and performance of friction stir welding joint through pre-welding rolling
A method for optimizing forming and performance of a friction stir welding head through pre-welding rolling belongs to the technical field of metal material welding processing, and comprises the following steps: before friction stir welding, a friction stir rolling welding tool is used for carrying out rolling treatment along a to-be-welded welding line path, so that a to-be-welded position is subjected to plastic deformation in advance; residual compressive stress and high-density lattice defects are introduced into the welded joint, so that residual tensile stress generated in formal welding can be effectively counteracted, residual deformation of the welded joint and the structure is reduced, and the mechanical property of the joint can be improved by promoting grain refinement of the weld joint and re-precipitation of a strengthening phase; therefore, synchronous optimization of forming and performance of the friction stir welding joint is realized. Compared with an existing welding method, the method is simple in process, high in repeatability, capable of achieving shape property common control of the large thin-wall welding structure and suitable for high-quality welding manufacturing in the fields of aerospace, rail transit, automobiles, ships and the like.
Owner:NORTHEASTERN UNIV AT QINHUANGDAO
Displacement amplification self-centering friction damper
PendingUS20260146445A1SpringsSprings/dampers design characteristicsRelative displacementVibration control
This invention relates to a kind of displacement amplification self-centering friction damper. The device uses gears to convert the axial deformation into the rotation of the friction-disc, and the friction device engages in friction at the edge of the friction-disc, then the displacement can be amplified and therefore it can reduce the frictional force and prolong the service life of friction components. At the same time, through gear transmission, the friction force provided by the friction device can increase with the increase of relative displacement, then it can provide suitable energy dissipation capability under different working conditions. Additionally, the device can automatically return to its initial state by disc-spring, and also provides self-centering capability for the structure simultaneously, advantageous in reducing residual deformation of the structure under severe earthquake. Compared with existing technologies, this invention has a better energy dissipation effect and is suitable for vibration control in engineering structures.
Owner:TONGJI UNIV
A replaceable coupling beam shearing wall structure design method
The application discloses a replaceable coupling beam shear wall structure design method, comprising the following steps: S1, determining an overall structure performance target; S2, determining a yield section replaceable coupling beam arrangement scheme; S3, yield section replaceable coupling beam stiffness calculation; S4, non-yield section connecting beam and pre-embedded steel strength checking; checking yield section replaceable coupling beam bending resistance or shear resistance; S5, checking yield section replaceable coupling beam stability; S6, designing a connecting mode between the yield section replaceable coupling beam and the non-yield section connecting beam; S7, setting a yield section replaceable coupling beam restoring force model and a yield displacement; S8, performing structure elastic-plastic analysis; and S9, checking structure performance. The replaceable coupling beam can deform plastically and dissipate energy under large seismic action, and the residual deformation can be controlled; the inter-story drift angle is smaller than that of a traditional structure; and the replaceable coupling beam can be replaced quickly after an earthquake by adopting detachable connection, so that the structure function can be recovered quickly and completely.
Owner:HAINAN UNIV
Super high-rise building steel structure outer frame welding sequence analysis optimization method and system
ActiveCN120951717BWelding/cutting auxillary devicesAuxillary welding devicesResidual deformationElement analysis
The application provides a super-high building steel structure outer frame welding sequence analysis optimization method and system, which comprises the following steps: taking H-shaped steel as a welding object, adopting an equivalent indirect action method to perform finite element analysis, equivalently taking the shrinkage of each weld as the deformation of a component in a preset geometric range caused by temperature drop, obtaining the deformation amount by a local thermal elastic-plastic method and calculating the equivalent temperature amount of each component, and applying the equivalent temperature amount to the whole structure to predict the welding shrinkage deformation; welding analysis is performed on a single-layer single-span steel frame, the influence of the sequence of two welding sections on the transverse residual deformation is analyzed, a single-sided frame is constructed, the strain around the weld is monitored in real time, and the predicted value is corrected; welding sequence analysis of the whole frame is performed, the deformation amount of each scheme is analyzed according to the welding scheme of different welding sequences, and the optimal scheme is selected. The cumulative deformation caused by the traditional sequence is avoided, and the overall stability of the structure is improved.
Owner:CSCEC INT CONSTR +2
Residual deformation acquisition method and device for isolation structure and storage medium
ActiveCN120764160BImprove estimation accuracyGeometric CADDesign optimisation/simulationResidual deformationClassical mechanics
This application relates to the field of seismic isolation bearing design technology. Specifically, an embodiment discloses a method, device, and storage medium for obtaining the residual deformation of a seismic isolation structure. The method includes: obtaining the equivalent yield displacement of the seismic isolation layer: where is the minimum yield displacement of all seismic isolation bearings; obtaining the equivalent yield-to-weight ratio of the seismic isolation structure: , where is the pre-yield stiffness of the i-th seismic isolation bearing, is the equivalent yield force, and G is the total weight of the upper structure of the seismic isolation layer; obtaining the equivalent post-yield stiffness ratio of the seismic isolation layer: , where is the post-yield stiffness of the i-th seismic isolation bearing; obtaining the equivalent ductility coefficient of the seismic isolation layer: , where D is the maximum horizontal displacement of the seismic isolation layer; obtaining the residual deformation calculation formula of the seismic isolation structure: , , and using the residual deformation calculation formula of the seismic isolation structure to obtain the residual deformation d of the seismic isolation structure. α , where is the guarantee rate, is the exponential parameter, is the stiffness ratio after yielding of the isolation layer, is the yield displacement of the isolation layer, is the yield-weight ratio of the isolation structure, and is the ductility coefficient of the isolation layer.
Owner:KUNMING UNIVERSITY
Solution method of residual deformation of low-damping flexible beam under blast loading
The present application relates to a kind of solving method of low damping flexible beam component residual deformation under explosion load, belong to the technical field of blast-resistant design, specifically including low damping flexible beam component refers to under the action of explosion, flexible beam component damping parameter x 2 Less than plastic hardening coefficient α ;And when the length of explosion load action t i Range, flexible beam component vibration does not reach the maximum value of positive elastic vibration, after explosion load unloading, rely on inertia force reaches the maximum value of positive elastic displacement t e Time y e , after explosion load unloading, flexible beam component continues to vibrate to a certain time t m , reached the maximum value of flexible beam component total elastic-plastic displacement y m , and according to the whole process of explosion, the process is divided into elastic stage forced vibration, elastic stage free vibration and plastic stage free vibration, elastic rebound stage, plastic rebound stage, elastic vibration six stages, and then determine the residual deformation of low damping flexible beam component under explosion load.
Owner:ZHONGBEI UNIV
Shockproof toughness design method for energy dissipation structure rotating around bottom centroid of structure
The invention discloses a shockproof toughness design method of an energy dissipation structure rotating around the centroid of the bottom of the structure, and relates to the technical field of structural engineering.The structure comprises an upper structure, vertical tension and compression limiting supports symmetrically arranged between the upper structure and a foundation, and energy dissipation dampers arranged in the supports or at the bottoms of the supports. According to the method, after a traditional fixed foundation structure is designed, rotation and energy consumption mechanisms are introduced step by step, specifically, the rigid body displacement proportion is preset to control swing response, the rigidity of a support system is distributed in proportion, parameters of the damper are designed according to the type difference of the damper, and finally it is ensured that the performance reaches the standard through finite element analysis and time-history verification. According to the method, the combination of overall structural swing deformation and concentrated energy consumption is achieved, residual deformation is remarkably reduced, the recoverability after an earthquake is improved, and the method has the advantages of being clear in design process, wide in applicability and high in anti-seismic toughness.
Owner:HAINAN UNIV
AI prediction control system and method for seal welding deformation of boiler heating surface
PendingCN121859731ABiological modelsDesign optimisation/simulationResidual deformationControl system
The invention relates to an AI prediction control system and method for seal welding deformation of a boiler heating surface, and relates to the technical field of seal welding deformation control of the boiler heating surface, and the AI prediction control system comprises a multi-source real-time data acquisition subsystem, a central intelligent prediction and decision subsystem and an active guide execution subsystem. According to the AI predictive control system and method for seal welding deformation of the boiler heating surface, qualitative change from passive correction to active pre-control is achieved, the consistency of deformation control precision and construction quality is remarkably improved, through an AI deep learning model, the future deformation trend can be predicted in advance based on the current heat-force state within millisecond-level time, and the prediction accuracy of the seal welding deformation of the boiler heating surface is improved. And when deformation does not appear or just begins to accumulate, a subsequent welding strategy is dynamically adjusted, for example, a reverse stress field is generated by changing the welding position, active counteracting is carried out, the final residual deformation is controlled at an extremely low level through the pre-control mechanism, and the pre-control mechanism is remarkably superior to a traditional static process rule.
Owner:CHINA CONSTRUCTION THIRD BUREAU FIRST ENGINEERING & MEP CO LTD
Terminal tray structure capable of preventing terminal deformation
ActiveCN224198950UPrevent each other from being squeezed and twistedAvoid deformation internal stressResidual deformationMechanical engineering
The utility model discloses a terminal tray structure capable of preventing terminal deformation. The terminal tray structure comprises a leaf disc, a first disc hub, an inner ring piece and a tendon bar, the first disc hub is coaxially arranged on one side of the blade disc; the inner ring piece is arranged on the blade disc and located on the periphery of the first disc hub, and the outer side of the inner ring piece and the blade disc jointly define a containing space. The tendon latch is mounted on the first disk hub to enter or leave the slot. An inner ring piece is arranged on a blade disc and located on the periphery of a first disc hub, the inner ring piece is provided with an empty groove, the inner ring piece is matched with a tendon bar to be installed on the first disc hub in the mode that the tendon bar can enter or leave the empty groove, the tendon bar extends into the empty groove during material receiving, and the tendon bar leaves the empty groove after material receiving is completed; the existence of the empty groove can provide a stretching space for slight deformation caused by thermal expansion and cold contraction of the terminals, so that mutual extrusion and distortion between the terminals are effectively prevented, a large amount of deformation internal stress left on the terminals is avoided, and permanent deformation caused by mutual extrusion of the terminals is effectively prevented.
Owner:GUANGDONG HUAZHAN ELECTRONICS CO LTD
A method for precisely rotary cutting a mouth of a metal shell
The application discloses a metal shell mouth precision rotary cutting processing method, and relates to the technical fields of lithium ion battery manufacturing process and numerical control precision machining, wherein, according to the local height deviation, the material cutting mechanics mechanism and the system inherent stiffness model are combined, a dynamic feeding compensation algorithm is run, the tensile residual deformation is eliminated, the design elevation is taken as a constraint target, the axial preset cutting depth and the feeding rate at different angle positions in the circumferential direction are calculated in real time, the customized numerical control processing instruction is generated, and the supply parameters of the lubricating medium with the preset flow are synchronously outputted. The application discards the traditional punching and laser cutting, and innovatively adopts the continuous micro rotary cutting process, the material is separated by experiencing stable shearing slip through the progressive stripping of the cutter, the processing process is stable, the tearing burrs caused by the instantaneous huge impact stress of the punching are avoided, and meanwhile, as a cold processing mode, the micro lubrication is matched.
Owner:ZHEJIANG TIANTAI JIUCHUAN NEW MATERIALS CO LTD
Method and system for analyzing and optimizing welding sequence of outer frame of steel structure of super high-rise building
ActiveCN120951717AWelding/cutting auxillary devicesAuxillary welding devicesResidual deformationElement analysis
The invention provides a super high-rise building steel structure outer frame welding sequence analysis optimization method and system, and the method comprises the steps: taking H-shaped steel as a welding object, carrying out finite element analysis through an equivalent indirect action method, enabling the contraction amount of each welding seam to be equivalent to the deformation of a component caused by cooling in a preset geometric range, and obtaining a welding sequence of the H-shaped steel; obtaining deformation through a local thermoelastic-plastic method, calculating equivalent temperature of each component, and applying the equivalent temperature to the overall structure to predict welding shrinkage deformation; a single-layer single-span steel frame is adopted for welding analysis, and the influence of the sequence of two welding sections on transverse residual deformation is analyzed; constructing a single-sided frame, monitoring the strain around the welding seam in real time, and correcting a predicted value; and welding sequence analysis is conducted on the whole frame, the deformation amount of each scheme is analyzed according to preset welding schemes of different welding sequences, and the optimal scheme is selected. Accumulated deformation caused by a traditional sequence is avoided, and the overall stability of the structure is improved.
Owner:CSCEC INT CONSTR +2
Solution method of residual deformation of high-damping flexible beam under blast loading
The present application relates to a kind of solving method of high damping flexible beam component residual deformation under explosion load, belong to the technical field of blast-resistant design, specifically including high damping flexible beam component refers to under the action of explosion, flexible beam component damping parameter x 2 Greater than plastic hardening coefficient α ; And when the length of explosion load action t i Range, flexible beam component vibration does not reach the maximum value of positive elastic vibration, after explosion load unloading, rely on inertia force reaches the maximum value of positive elastic displacement t e Time y e , after explosion load unloading, flexible beam component continues to vibrate to a certain time t m , reached the maximum value of flexible beam component total elastic-plastic displacement y m , and according to the whole process of explosion, the process is divided into elastic stage forced vibration, elastic stage free vibration and plastic stage free vibration, elastic rebound stage, plastic rebound stage, elastic vibration six stages, and then determine the residual deformation of high damping flexible beam component under explosion load.
Owner:ZHONGBEI UNIV
Ballastless track steel truss girder bridge deck manufacturing process
The invention relates to the technical field of steel truss bridge deck manufacturing, in particular to a ballastless track steel truss bridge deck manufacturing process. A railway bridge deck is formed by continuously matching and splicing multiple sections and is manufactured by adopting a reverse manufacturing method in a matching manner. According to the method, the raw material plates entering a factory are leveled in the manufacturing process, the flatness per square meter is not larger than 1 mm, therefore, residual deformation of the steel plates is eliminated, rolling internal stress is reduced, deformation in the manufacturing process can be reduced, and the unstressed length of the steel plates is guaranteed. Pre-camber offset is set for the standard node cross beam and the fulcrum cross beam, so that the steel beam can smoothly reach a designed line shape in a stressed mounting state; a reverse manufacturing method is adopted for matched manufacturing, and a multi-section continuous matching and splicing method is adopted for installation, so that stress and deformation in the installation process are reduced, and it is guaranteed that actual installation is conducted smoothly.
Owner:JIANGSU JINGHU HEAVY IND
Building structure design method considering residual deformation of goaf
PendingCN122020772AGeometric CADDesign optimisation/simulationStructural deformationResidual deformation
The invention belongs to the field of building structure design, and particularly relates to a building structure design method considering residual deformation of a goaf. In the upper building structure model, inputting goaf residual deformation prediction data; setting parameters of a goaf building model, including deformation design of an upper structural member and deformation design of a building foundation; judging whether the upper structure deformation design meets design requirements or not, and if yes, entering the next step; if not, adjusting the rigidity of the structural system and the component until the requirements are met; judging whether the building foundation deformation design meets design requirements or not, and if yes, entering the next step; if not, foundation reinforcement and deformation resistance measures are adopted until the requirements are met; designing internal force of an upper building structure; reinforcement design is carried out; and generating a final upper building model.
Owner:SHANDONG TONGYUAN DESIGN GRP
Staged composite energy dissipation and shock absorption device capable of effectively reducing harmful deformation
The invention discloses a staged composite energy dissipation and shock absorption device capable of effectively reducing harmful deformation. The high-strength friction plate is composed of I-shaped steel, a rectangular friction plate, a sawtooth-shaped metal strip, a small gear, a large gear, a follow-up gear, a metal disc, a metal ball, a high-strength metal spring, T-shaped steel, a limiting baffle, a U-shaped high-strength metal plate, a low-yield-point metal cylinder, a high-strength metal cylinder, an arc-shaped friction plate, a round friction plate and the like. Under the action of an earthquake, the rectangular friction plates, the circular friction plates and the arc-shaped friction plates can dissipate energy through friction, the low-yield-point metal cylinders can dissipate energy through buckling, meanwhile, through the amplification effect of the gears, small translational motion of the structure can be converted into large rotation of the follow-up gears, and metal balls in the metal discs are driven to exert collision energy dissipation; therefore, harmful deformation of the structure is effectively reduced. Earthquake energy is dissipated through collision and buckling. In addition, the purpose of self-resetting can be achieved through the high-strength metal springs, and therefore post-earthquake residual deformation of the structure is reduced.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
A simulation method for thermal straightening of composite rotary body based on deformation energy theory
The application discloses a simulation method for thermal straightening of a composite material rotary body based on deformation energy theory, belongs to the field of structural composite materials and process technology, and is suitable for manufacturing of a composite material rotary body component. The application adopts a mesoscopic mechanics model to predict viscoelastic properties of the composite material as model material performance input conditions, performs straightening load design based on a functional principle through energy conservation of three energy increments, i.e., a deformation energy increment caused by the straightening load, a deformation energy increment caused by springback deformation after unloading of the straightening load, and a deformation energy increment between a final straightening state and an initial deformation state, simulates straightening springback and straightening residual deformation conditions, and guides deformation control of the composite material process.
Owner:AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
An evaluation method for the influence of residual deformation of goaf on the structural stability of simply supported beam bridge
ActiveCN117972830BGeometric CADSpecial data processing applicationsEngineering researchSensitive analysis
The present application belongs to the technical field of geotechnical engineering research, and particularly relates to a method for evaluating the influence of residual deformation of a goaf on the structural stability of a simply supported beam bridge, which comprises the following steps: constructing a numerical model in a virtual environment in combination with the goaf and the stratum structure of the target simply supported beam bridge; obtaining the mechanical parameters of the broken rock mass and performing sensitivity analysis to generate a sensitivity sequence; equivalent the residual deformation of the goaf to the mechanical parameters of the broken rock mass in the caving zone, determining the equivalent parameters of the residual deformation based on the sensitivity sequence, importing the equivalent parameters into the numerical model to simulate the residual deformation, and outputting the simulation results; establishing a stability evaluation system based on the influence index of the structural stability of the simply supported beam bridge and the residual subsidence, introducing the residual subsidence of the pile foundation of the simply supported beam bridge and the tangential resultant force on the rock-soil contact surface of the pile foundation to evaluate the stability of the target simply supported beam bridge; the evaluation method proposed by the present application can effectively evaluate the influence of the residual deformation of the goaf on the structural stability of the simply supported beam bridge and improve the research efficiency.
Owner:ANHUI UNIV OF SCI & TECH
A design method of pile-column integrated short pile based on deformation and bearing capacity control
The application discloses a design method of pile-column integrated short pile based on deformation and bearing capacity control, determines various working load conditions; judges whether to adopt a pile cap according to site soil layer conditions and pile top deformation control requirements, considers whether to reduce additional load coefficient; determines pile diameter according to engineering actual conditions; calculates foundation part deformation limit value according to pile diameter, load under normal working conditions and column top deformation control requirements; initially determines pile length, respectively calculates pile body internal force and horizontal deformation under normal working conditions and limit load conditions; checks foundation horizontal deformation under normal working conditions, checks foundation horizontal residual deformation under limit load conditions, foundation horizontal bearing capacity under limit load conditions, foundation torsional deformation under normal working conditions and foundation torsional bearing capacity under limit load conditions; determines pile type according to pile bending moment and pile crack resistance bending moment, and the crack resistance bending moment should consider the influence coefficient of horizontal-torsional load coupling effect. The calculation result of the application is reliable and meets design requirements.
Owner:NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GRP
Compression strut for improving the collapse resistance of a spatial steel structure
The application discloses a compression rod for improving the anti-collapse performance of a space steel structure, which comprises an inner tube, an upper outer half tube and a lower outer half tube fixedly sleeved outside the inner tube, an upper half clamp fixedly sleeved outside the upper outer half tube, a lower half clamp fixedly sleeved outside the lower outer half tube, a first annular push plate and a second annular push plate fixedly sleeved outside the upper outer half tube and the lower outer half tube, and a spring arranged between the first annular push plate and the second annular push plate, wherein the upper half clamp is provided with upper half clamp ear plates on both sides, the lower half clamp is provided with lower half clamp ear plates on both sides, the upper half clamp ear plates are connected with the lower half clamp ear plates through bolts, and the relative sliding direction is arranged in the axial direction of the inner tube. The compression rod can effectively improve the compression load bearing capacity of a rod piece, control the residual deformation of the rod piece, improve the energy consumption capacity of the rod piece, and achieve the purpose of enhancing the anti-collapse performance of the space steel structure.
Owner:SOUTHEAST UNIV
A process for fabricating the deck of a ballastless track steel truss bridge
This invention relates to the field of steel truss bridge deck fabrication technology, and particularly to a fabrication process for ballastless track steel truss bridge decks. The railway bridge deck is assembled using a multi-segment continuous matching method and manufactured using a reverse-engineering method. In this invention, the raw material plates are leveled before preparation to achieve a flatness of no more than 1mm per square meter, thereby eliminating residual deformation and reducing rolling internal stress, thus minimizing deformation during manufacturing and ensuring stress-free length. Furthermore, a pre-camber offset is set for the standard node crossbeams and support crossbeams to ensure that the steel beams can smoothly achieve the designed alignment under stress during installation. The reverse-engineering method and multi-segment continuous matching assembly method are used for manufacturing to reduce stress and deformation during installation, ensuring smooth actual installation.
Owner:JIANGSU JINGHU HEAVY IND
Shape correcting punching die of power battery box cover
The invention relates to the field of automobile part manufacturing, and discloses a power battery box cover shape correcting stamping die which comprises a bottom frame, a lower shape correcting die, a lifting frame, an upper shape correcting die and an upper water gap stamping knife. The lower shape correcting die comprises a lower plate, a lower shape correcting sub-block and a lower gasket; the upper shape correcting die comprises an upper plate, an upper shape correcting sub-block and an upper gasket. According to the shape correcting stamping die, the water gap punching process and the shape correcting process are integrated in the same die and are synchronously completed through one-time die closing operation, the upper shape correcting die and the lower shape correcting die are both designed in a partitioned modular mode through combination of the shape correcting sub-blocks and the gaskets, and each shape correcting sub-block independently corresponds to an easy-to-deform area of a workpiece. By adjusting the thickness of the upper gasket or the lower gasket in the corresponding area, the material springback amount of the area can be compensated in a targeted mode, the problem of residual deformation caused by the fact that springback is not considered in a traditional integrated mold is solved, the size precision of the box cover is remarkably improved, and the requirement for manual secondary adjustment is reduced.
Owner:GUANGDONG WENCAN DIE CASTING TECH CO LTD
A multi-roll continuous straightening device for aluminum material
Owner:TIANJIN YUYA METAL TECHNOLOGY CO LTD
Intrinsic strain field calibration method and system based on stress inversion and numerical optimization
PendingCN122347001AImprove forecast accuracyAchieve independent calibrationElement modelStress measurement
The present application proposes a stress inversion and numerical optimization based intrinsic strain field calibration method and system, belonging to the technical field of metal additive manufacturing numerical simulation. The present application solves the problems in the existing strain field calibration method, such as the lack of feedback calibration mechanism based on measured stress, the focus on residual deformation only, the inability to verify the material constitutive model, the poor generalization of intrinsic strain parameters, and the significant deviation between the prediction results of complex components and the actual measurement. The method comprises the following steps: S1: preparing a calibration sample according to the target material; S2: obtaining the measured value of residual stress at the measurement point of the calibration sample; S3: establishing a finite element model of the calibration sample; S4: establishing a target function and performing automatic iterative solution to obtain the optimal solution of the design variable. The system comprises a calibration sample preparation module, a stress measurement module, a modeling module and a design variable solving module.
Owner:HARBIN INST OF TECH
Solution method of residual deformation of high-damping rigid beam under blast loading
The present application relates to a kind of solving method of high damping rigid beam component residual deformation under explosion load, belong to the technical field of blast-resistant design, specifically including high damping rigid beam component refers to under the action of explosion, rigid beam component damping parameter x 2 Greater than plastic hardening coefficient α ;And when the length of explosion load action t i Range, rigid beam component vibration does not reach the maximum value of positive elastic vibration, after explosion load unloading, rely on inertia force reaches the maximum value of positive elastic displacement t e Time y e , after explosion load unloading, rigid beam component continues to vibrate to a certain time t m , reached the maximum value of rigid beam component total elastic-plastic displacement y m , and according to the whole process of explosion, the process is divided into elastic stage forced vibration, elastic stage free vibration and plastic stage free vibration, elastic rebound stage, plastic rebound stage, elastic vibration six stages, and then determine the residual deformation of high damping rigid component under explosion load.
Owner:ZHONGBEI UNIV
High-speed railway track-bridge seismic coordination shock absorption and isolation system and design method
This invention discloses a seismic isolation and damping system and design method for high-speed railway track-bridge seismic coordination. The system comprises a functionally separated seismic isolation and damping system including sliding bearings, limiting components, and self-resetting energy dissipation devices. The design method establishes graded performance objectives based on frequent earthquakes, design earthquakes, and rare earthquakes, forming graded solution constraints for bearing friction parameters, limiting trigger parameters, self-resetting parameters, and energy dissipation parameters. Through an "input-solution-verification-iteration" process, it determines the target parameter combination that satisfies pier elastic control, system transformation control, post-earthquake beam end residual deformation control, and track smoothness control. This invention achieves coordinated design of both structural safety and traffic safety objectives for high-speed railway track-bridge systems. By decoupling the bridge's load-bearing function from its energy dissipation function, it reduces the coupling degree between different functional components, improving the replaceability of damaged components after an earthquake and the overall repairability of the system.
Owner:CENT SOUTH UNIV
Long-span bridge line-bridge service evaluation method and system under long-term load effect
The invention provides a long-span bridge line-bridge service evaluation method and system under the long-term load effect, and belongs to the technical field of railway engineering research. According to the data information, establishing a large-span bridge-line space coupling finite element model considering the performance degradation of the track structure; different load effects are applied to the bridge and the track according to the obtained time history curve, and the steel rail longitudinal force, the beam-track relative displacement and the track transverse and vertical displacement under the long-term load effect are determined; the residual force and residual deformation of the steel rail are calculated according to the longitudinal force of the steel rail and the beam-rail relative displacement in different time courses, and the longitudinal service performance of the rail is evaluated; and aiming at the transverse and vertical displacement of the track in different time courses, evaluating the transverse and vertical service performance of the track by adopting a chord measurement method to obtain a track smoothness evolution rule. According to the method, the service performance is comprehensively evaluated in the longitudinal direction, the transverse direction and the vertical direction, and scientific guidance and a theoretical basis are provided for line-bridge operation and maintenance.
Owner:BEIJING JIAOTONG UNIV +3
Quantitative evaluation method for seismic performance index of ecc jacketed composite column
ActiveCN120763456BClimate change adaptationComplex mathematical operationsResidual deformationSeismic resistance
The application relates to the technical field of seismic performance evaluation of ECC jacketed composite columns, and particularly provides a seismic performance index quantification evaluation method of an ECC jacketed composite column, which calculates key seismic performance indexes such as bearing capacity, cumulative energy dissipation, ductility coefficient and limit value of the repairability interval, combines weight analysis and importance coefficient adjustment, establishes a scientific and comprehensive seismic performance evaluation system, proposes a determination method of the damage point of the ECC jacketed composite column, accurately determines the damage state, especially introduces the repairability interval evaluation, divides the repair grades based on residual deformation and Park-Ang damage indexes, provides a basis for post-earthquake maintenance decision, comprehensively considers different loading conditions through the proposed seismic performance index evaluation index, sets clear engineering application threshold values, and is convenient for engineers to quickly evaluate and optimize design; the method has important significance for promoting the engineering application of the ECC jacketed composite column.
Owner:CEEC HUNAN ELECTRIC POWER DESIGN INST