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32 results about "Longitudinal deformation" patented technology
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Paper box folding mechanism, lid folding device, and box sealing machine
To provide a paper box folding mechanism, a lid folding device, and a box sealing machine which effectively prevent the occurrence of misalignment and deformation of a box, have little effect on deformation of the box and the box body in the longitudinal direction, and have a space-saving effect. [Solution] The carton folding mechanism replaces the two guide rods 2 and 3 arranged in a figure-eight shape with a symmetrically arranged spiral guide rod. The spiral guide rod is connected to a rotating shaft 4 via spokes. A drive assembly 5 rotates the rotating shaft, which in turn rotates the spiral guide rod, folding the carton on both sides of the length in the transport direction of the packaging box to seal the lid. In addition to reducing the length of the guide rod, this invention also generates two rotation vectors when the spiral guide rod rotates: one vector in the transport direction of the packaging box, and the other vector for folding the length inward on the length. Compared to the way conventional guide rods apply resistance, the spiral rotatable guide rod applies a gentle force to the length of the carton.
Owner:MATSUKAWA GIKEN KOGYO CO LTD
Large-scale ti2alnab alloy sheet and method of making
The application relates to the alloy processing technical field, in particular to a large-specification Ti2AlNb alloy sheet and a preparation method thereof. The preparation method comprises the following steps: (a) carrying out one-pass rolling on a Ti2AlNb alloy slab along the width and length directions respectively at 1050-1100 DEG C to obtain an intermediate slab; and carrying out annealing treatment on the intermediate slab at 1000-1045 DEG C; (b) carrying out one-pass rolling on the annealed intermediate slab along the width and length directions respectively at 850-980 DEG C, carrying out cladding rolling along the length direction, and then carrying out annealing treatment at 800-950 DEG C. The application sequentially carries out high-temperature reversing rolling, intermediate annealing, low-temperature reversing rolling and post-rolling annealing, controls the transverse and longitudinal deformation amounts of the high-temperature reversing rolling and the low-temperature reversing rolling, guarantees the mechanical properties of the sheet and reduces the transverse and longitudinal performance difference of the sheet.
Owner:GAONA AERO MATERIAL CO LTD
Multi-degree-of-freedom miniature piezoelectric actuator with plate-beam combined structure
PendingCN121333125APiezoelectric/electrostriction/magnetostriction machinesPiezoelectric actuatorsElectrical drive
The invention relates to a plate-beam combined structure multi-degree-of-freedom micro piezoelectric actuator, which belongs to the technical field of piezoelectric driving and comprises a driving component, and a driven sliding block is in frictional contact with the driving tail end of the driving component; the driving part comprises a base body formed by combining plate beams, piezoelectric elements are arranged on the base body, and the sliding block is driven to achieve multi-degree-of-freedom movement. The driving part comprises a combined plate-beam base body and a plurality of piezoelectric elements for promoting the combined plate-beam base body to generate vibration, and the piezoelectric elements are arranged at the beam structure end to promote the driving end of the combined plate-beam base body to bend and deform or vibrate in a first direction and a second direction which are perpendicular to each other on a horizontal plane; the end of the plate structure is provided with a piezoelectric element which promotes longitudinal deformation or vibration in a third direction perpendicular to the first direction and the second direction. The multi-degree-of-freedom micro piezoelectric actuator can solve the technical problems that an existing multi-degree-of-freedom micro piezoelectric actuator is complex in structure, tedious in excitation scheme, high in driving difficulty and limited in driving efficiency and precision.
Owner:NORTHEASTERN UNIV CHINA
Immersed tunnel joint numerical simulation method considering foundation differential settlement effect
PendingCN121936013Aaccurate assessmentEffectively predict the risk of crackingGeometric CADDesign optimisation/simulationElastic plasticImmersed tube
The invention discloses an immersed tunnel joint numerical simulation method considering a foundation differential settlement effect, and belongs to the technical field of settlement simulation, the method comprises the following steps: constructing a joint rigidity weakening equivalent PD shell model based on a near field dynamics plate shell basic theory, and obtaining a motion equation under a global coordinate system through coordinate transformation; an ideal elastic-plastic soil spring is used for representing soil-tunnel interaction, and a flexible joint is simulated through a local weakening method; dispersing the immersed tunnel by a meshless method, applying a soil spring by volume force and applying differential settlement in a quasi-static state; and solving the equation by adopting a self-adaptive dynamic relaxation format, and outputting pipe joint longitudinal deformation, joint opening amount and cracking risk results. According to the method, the pipe joint and joint deformation of the immersed tunnel under continuous and discontinuous working conditions can be evaluated more accurately, and the possible cracking risk can be effectively predicted.
Owner:CHINA RAILWAY TUNNEL GROUP CO LTD +3
Bridge floor deformation prediction method under temperature influence of highway-railway dual-purpose multi-tower cable-stayed bridge
PendingCN121959902AEnsure safety reservesImprove versatilityGeometric CADDesign optimisation/simulationArchitectural engineeringBridge deck
The invention discloses a bridge floor deformation prediction method under temperature influence of a highway-railway dual-purpose multi-tower cable-stayed bridge, which comprises the following steps of: based on a temperature gradient model of a bridge tower, establishing a longitudinal deformation model of the bridge tower at the most unfavorable temperature, and establishing a main beam deformation prediction model caused by deformation of the bridge tower; based on the temperature gradient model of the main beam, establishing a main beam deformation prediction model of the main beam at the most unfavorable temperature; establishing a main beam deformation prediction model of the stay cable at the most unfavorable temperature based on the most unfavorable temperature difference model among the stay cable, the tower and the beam; performing weighted combination on the three girder deformation prediction models according to the combination coefficient to obtain a bridge floor overall deformation prediction model; according to the scheme, the method for establishing the deformation of the bridge floor through the deformation of the main beam caused by the bridge tower, the deformation of the main beam and the deformation of the main beam caused by the stay cable is systematically provided, and reference is provided for simplifying and calculating the temperature effect borne by the same type of bridge structures.
Owner:SOUTHWEST JIAOTONG UNIV +2
A deformation detection device and method for a bridge guardrail
The present application relates to the technical field of bridge monitoring, in particular to a deformation detection device and method for bridge guardrails. The deformation detection device for bridge guardrails comprises a transverse detection assembly and a longitudinal detection assembly. The transverse detection assembly comprises a laser emitting part, a laser receiving part and a moving mechanism. The laser emitting part and the laser receiving part are driven by the moving mechanism to move along the extension direction of the guardrail, so as to realize segmented transverse deformation detection of the full length range of the guardrail and avoid missing hidden deformation in the middle area. The longitudinal detection assembly is used for detecting the longitudinal deformation of the guardrail, and forms a transverse-longitudinal bidirectional detection system with the transverse detection assembly, so as to accurately locate the deformation position and degree, significantly improve the integrity and accuracy of the deformation detection of the guardrail, and provide reliable data support for the maintenance of the guardrail.
Owner:HUNAN LINXI CONSTRUCTION ENGINEERING CO LTD
A device for widening superstructure of new and old bridges
The application discloses a new and old bridge superstructure splicing device, belongs to the technical field of highway bridge splicing, and aims to solve at least one problem that old bridge support is damaged, a bridge deck is cracked or deformed, and bridge deck continuity is damaged due to inconsistent longitudinal deformation of the same transverse section of a new and old bridge in the prior art. The splicing device is used for connecting the old bridge and the new bridge, and comprises a first truss connected with the old bridge, a first steel structural member arranged on the first truss and connected with the first truss, a second truss connected with the new bridge, a second steel structural member arranged on the second truss and connected with the second truss, and a concrete block located in a gap between the new bridge and the old bridge. One end of the concrete block is connected with the first steel structural member, and the other end of the concrete block is connected with the second steel structural member. The application can adapt to differential settlement and shrinkage creep deformation between the new and old bridges, and relieve damage of the old bridge support caused by longitudinal shear deformation.
Owner:HEBEI PROVINCIAL COMM PLANNING & DESIGN INST
Method for determining optimal initial support timing of underground works
The application discloses a method for determining an optimal primary support time of underground engineering, proposes a concept of plastic volume rate, determines the optimal primary support time through a sudden change point of a plastic volume rate change curve with a surrounding rock release rate, takes a displacement release rate as a link, combines a surrounding rock longitudinal deformation convergence curve, determines a supporting structure following a working face distance index as a support time criterion, quantitatively and explicitly determines the optimal primary support time of the surrounding rock, and establishes a method for determining the primary support time of the underground engineering layered excavation based on the plastic volume rate, thereby breaking through a problem that a displacement evolution critical state is difficult to find in a method for determining the primary support time based on the displacement release rate and the method cannot be applied to the determination of the primary support time of different layers in the layered excavation of the underground powerhouse, and providing a reference for the layered and stepped excavation design and construction of large underground engineering.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES +3
A compression-shear and tension-shear structural system simulation device
ActiveCN117831391BSolve problems that cannot be simulatedEducational modelsClassical mechanicsPetroleum oil
This invention discloses a simulation device for compression-torsion and tension-torsion tectonic systems, relating to the field of petroleum and natural gas geology. The invention includes a support platform and several plexiglass rods arranged side-by-side on the support platform. Longitudinal constraint components are arranged on the front and rear sides of each plexiglass rod, and transverse constraint components are arranged on the front and rear sides of each plexiglass rod. The longitudinal and transverse constraint components form a deformable parallelogram constraint component. A longitudinal drive mechanism is provided on the support platform to drive the parallelogram constraint component and induce longitudinal deformation of the plexiglass rods. A transverse compression mechanism is also provided on the support platform to laterally compress the plexiglass rods. This invention has the advantages of simple structure, reasonable design, and the ability to accurately simulate compression-torsion and tension-torsion tectonic systems within a craton through the longitudinal drive mechanism and transverse compression mechanism, thus solving the problem of the inability to simulate strike-slip fracture systems within a craton.
Owner:PETROCHINA CO LTD
Real-time automated monitoring method for vertical and longitudinal deformation of main beams of ultra-long span railway cable-stayed bridges
This invention discloses a real-time automated monitoring method for the vertical and longitudinal deformation of the main girder of an ultra-long span railway cable-stayed bridge. Specifically, it involves: first, establishing an independent coordinate system for the bridge axis; then, constructing an automated monitoring system using a high-precision intelligent total station; employing a relative elevation difference method with a trigonometric leveling network to monitor the vertical deformation of the main girder in real time; and correcting the elevation of adjacent CPIII points on the same cross-section in real time based on the elevation changes at each monitoring point; finally, achieving real-time automated monitoring of the main girder's vertical deformation based on the vertical deformation monitoring results and the total station's observation of the slant distance at each monitoring point; and integrating longitudinal displacement sensor data for cross-validation to achieve quality control and system self-checking of the monitoring results. This invention demonstrates significant advantages in measurement accuracy, response speed, and resource investment, achieving high-precision, high-efficiency, and low-cost automated monitoring.
Owner:NINGBO SHIYU RAILWAY INVESTMENT DEV CO LTD
Construction method for shield ground-to-ground butt joint in strong water-permeable sand stratum
ActiveCN116220703BPrecise dockingreduce distortionUnderground chambersHydro energy generationButt jointFrost heaving
The present application belongs to the technical field of shield tunnel engineering, and particularly relates to a construction method for shield ground-to-ground butt joint in strong water-permeable sand stratum, comprising the following steps: first, stop the shield machine, keep pressure and grout the surrounding stratum for reinforcement, then, the trailing shield machine is grouted in advance for reinforcement, the posture of the trailing shield machine is adjusted, the butt joint position of the two shield machines is frozen and reinforced in the grouted and reinforced stratum, and the like. The construction method solves the problems that single method for stratum reinforcement in strong water-permeable sand stratum cannot meet the requirements of shield ground-to-ground butt joint and shield posture adjustment in strong water-permeable sand stratum, shortens the stratum reinforcement time, reduces the stratum frost heaving and thawing settlement effect, improves the shield butt joint construction efficiency, and reduces the longitudinal deformation of the formed tunnel.
Owner:CCCC TUNNEL ENG CO LTD
Transverse widening connection structure and construction method for longitudinally sliding continuous beam bridge
ActiveCN117403569BBridge erection/assemblyBridge strengtheningArchitectural engineeringContinuous beam
This invention discloses a longitudinally sliding continuous beam bridge transverse widening connection structure and construction method, including a groove formed within the flange of the new bridge with its opening facing the flange of the old bridge; a circular channel steel located within the groove with its opening facing the flange of the old bridge; an arc-shaped sliding plate located on the inner side of the circular channel steel to reduce friction; a solid circular steel pipe located on the inner side of the arc-shaped sliding plate; transverse connecting steel bars wound around the outer surface of the solid circular steel pipe with one end embedded in the flange of the old bridge; a vertical sliding plate vertically attached to the end face of the new bridge flange to reduce friction; and a steel plate vertically attached to the end face of the old bridge flange, wherein the vertical sliding plate and the steel plate are in close contact with each other. In this invention, the solid circular steel pipe can slide longitudinally within the circular channel steel, and the arc-shaped sliding plate reduces friction, providing better longitudinal bridge sliding deformation. This fundamentally solves the problem of excessive transverse bending deformation caused by the difference in longitudinal deformation between the new and old bridges, leading to cracking and damage of the widening structure.
Owner:SOUTHEAST UNIV
Non-contact dynamic torque measuring device and torque testing method
The invention provides a non-contact dynamic torque measuring device and a torque testing method. The non-contact dynamic torque measuring device comprises a sensor body, an amplifying shaft and a non-contact displacement sensor, the sensor body is coaxially sleeved outside the amplification shaft, two ends of the sensor body are fixedly connected with the amplification shaft, and the sensor body axially comprises sleeve bodies at two ends, a gridding sleeve in the middle and a central disc located in the middle of the gridding sleeve; the gridding sleeve comprises a plurality of gridding ribs which are arranged in parallel in the circumferential direction and twisted in the same rotating direction, due to the fact that the coupling effect exists in the anisotropy, longitudinal deformation and torsional deformation of the gridding sleeve, torsion angles at the two ends can be converted into axial displacement of the center disc under the condition that rigid body rotation of the rotating shaft is eliminated, and the rotation direction of the rotating shaft is changed. Torsional deformation is converted into axial displacement of the center disc, non-contact dynamic torque measurement is achieved through the non-contact displacement sensor under the condition that an external sliding ring is not needed, and measurement precision, reliability and non-interference performance are guaranteed.
Owner:SHANGHAI JIAOTONG UNIV
Expansion joint device for large-cantilever pedestrian steel bridge end and existing structure and construction method
PendingCN121345025AClimate change adaptationBridge structural detailsBridge engineeringArchitectural engineering
The invention provides an expansion joint device for a large-cantilever pedestrian steel bridge end and an existing structure and a construction method. The expansion joint device comprises an assembly on the side of the existing structure, an assembly on the end side of the large-cantilever pedestrian steel bridge, a water stop belt and a double-side-hung hinge center cover plate. The components on the side of the existing structure are mounted on the existing structure, and the components on the end side of the large-cantilever pedestrian steel bridge are mounted at the end of the large-cantilever pedestrian steel bridge; the double-side-hung hinge center cover plate is connected with an assembly on the side of an existing structure and an assembly on the end side of the large-cantilever pedestrian steel bridge, and the end of the large-cantilever pedestrian steel bridge deforms vertically and / or longitudinally through the double-side-hung hinge center cover plate. The water stop belt is connected with the existing structure through an assembly on the side of the existing structure, and the water stop belt is connected with the large cantilever pedestrian steel bridge through an assembly on the end side of the large cantilever pedestrian steel bridge. The invention relates to the technical field of bridge engineering, and can solve the problem that an expansion joint device in the prior art cannot meet the large vertical deformation requirement of a large-cantilever pedestrian steel bridge end.
Owner:SHANGHAI CONSTRUCTION GROUP CO LTD
A device and method for determining the elastic modulus and poisson's ratio of ultra-high performance concrete
This invention belongs to the field of mechanical property testing technology for building materials, and particularly relates to a device and method for determining the elastic modulus and Poisson's ratio of ultra-high performance concrete. The device includes: an upper and lower collar vertically connected by sliding rods, and a middle clamping ring connected to the lower collar by a short sliding rod. All three rings are made of high-strength stainless steel and are fixed to the specimen by circumferentially distributed fastening screws. A first and second displacement sensor, symmetrically arranged on the upper and lower collars, are used to measure longitudinal deformation, while a third displacement sensor held by the middle clamping ring is used to measure lateral deformation. All sensors are adjustablely fixed by anchoring screws in anchoring holes. The method of use includes: installing the sensors and ensuring they are in a pre-compressed state; simultaneously collecting longitudinal and lateral displacement data during the pressure test; and finally, simultaneously calculating the elastic modulus and Poisson's ratio through strain calculation.
Owner:HARBIN ENG UNIV
Wear-resistant flux-cored wire for welding high-manganese steel lining plate and surfacing method
PendingCN121848016AWelding wire manufacturing costs reducedreduce manufacturing costPlasma welding apparatusWelding/cutting media/materialsFerrosiliconGraphite
The invention discloses a wear-resistant flux-cored wire for welding a high-manganese steel lining plate and a surfacing method, and belongs to the technical field of surface strengthening of mining machinery. A flux core of the welding wire is composed of high-carbon ferrochrome powder, graphite powder and a small amount of ferrosilicon, ferromanganese, ferrotitanium, ferroboron and nickel powder, an outer skin is a low-carbon cold-rolled steel strip, the diameter of the outer skin ranges from 2.4 mm to 3.2 mm, and the filling rate of the outer skin ranges from 38% to 50%. According to the surfacing method, plasma arc automatic surfacing is adopted during welding, paraxial wire feeding is conducted, and argon protection is conducted; controlling the surface temperature of the high-manganese steel lining plate; the thickness of a single-layer surfacing layer is about 3 mm, the hardness is 58-65 HRC, the single-layer surfacing layer is metallurgically bonded with high manganese steel without cracks, the longitudinal deformation of the lining plate is smaller than or equal to 1.9 mm, and the wear resistance is improved to 2.0-3.3 times that of a base material. The high-carbon ferro-chrome serves as a main raw material, the raw material particle size range is wide, the welding wire cost is low, the process is stable, and the method is suitable for on-site rapid repairing and new piece strengthening of the ball mill end cover high-manganese steel lining plate.
Owner:ANSTEEL GROUP MINING CO LTD
A type of split-type buried tunnel entrance expansion joint
ActiveCN117027846Bavoid crackingHydro energy generationTunnelsExpansion jointLongitudinal deformation
This application relates to a separated, buried tunnel entrance expansion joint, comprising: an open tunnel section and a buried tunnel section. The open tunnel section is located on one side of the buried tunnel section, and a circumferential expansion joint is provided between them. The buried tunnel section includes a left tunnel, a right tunnel, and an entrance end wall. The left and right tunnels are located on opposite sides of the entrance end wall along the tunnel width direction, thus separating the left and right tunnels. A longitudinal expansion joint is provided in the middle of the entrance end wall along the tunnel length direction. In this invention, the longitudinal expansion joint separates the left and right tunnels, preventing them from affecting each other when the settlement of the left and right tunnels in the buried tunnel section is uneven, thus avoiding cracking of the left and right tunnels at the entrance. The circumferential expansion joint between the open tunnel section and the buried tunnel section separates the open tunnel section, the buried tunnel section, and the entrance end wall, preventing mutual interference during deformation and settlement of the open tunnel section and the buried tunnel section.
Owner:CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE CO LTD
Pile foundation structure for V-shaped pier rigid frame bridge and construction method of pile foundation structure
The invention provides a pile foundation structure for a V-shaped pier rigid frame bridge and a construction method thereof.The pile foundation structure comprises a bearing platform and a plurality of pile foundations arranged at the bottom of the bearing platform, each pile foundation comprises a vertical section embedded and fixed into a bearing stratum, the top of each vertical section is provided with a hole shrinkage connecting section, and the top of each hole shrinkage connecting section is anchored into the bearing platform; and a high-damping elastic coating sleeve is arranged outside the high-damping elastic coating sleeve, and forms a local flexible area at the joint of the pile foundation and the bearing platform. The flexible tuning area made of the high-damping elastomer material is arranged on the upper section of the pile body, so that the equivalent bending rigidity of the area is effectively reduced, the pile foundation can actively adapt to longitudinal deformation caused by temperature change, shrinkage creep and the like while bearing vertical load and horizontal thrust transmitted by the V-shaped pier, and the stability of the pile foundation is improved. Secondary internal force in the bearing platform and the pile body is obviously reduced, concrete cracking is avoided, and the structural durability is improved.
Owner:CRCC CHONGQING INVESTMENT GRP CO LTD +1
Detection windows, polishing pads, and chemical mechanical polishing apparatus
The application provides a detection window, a grinding gasket and a chemical mechanical grinding device. Two ends of an inner frame of the detection window are arc-shaped, and a top opening of the inner frame is larger than a bottom opening of the inner frame, so that the side wall of the inner frame gradually converges inward at a preset inclined angle to form a slope structure. The detection window, the grinding gasket and the chemical mechanical grinding device provided by the application can disperse the stress on the two ends of the inner frame by setting the two ends of the inner frame as arc-shaped, so as to weaken the bulging deformation of the detection window caused by the pressure difference and the lateral friction force. The side wall of the inner frame gradually converges inward at a preset inclined angle to form a slope structure by setting the top opening of the inner frame as larger than the bottom opening of the inner frame, so that a certain lateral deformation space is provided to relieve the longitudinal deformation when the detection window is subjected to the lateral friction force, so as to weaken the degree of bulging, and further to reduce the risk of the detection window being broken.
Owner:SHANGHAI HUALI MICROELECTRONICS CORP
Lining structure enabling compressed air energy storage artificial chamber to adapt to temperature deformation
ActiveCN224282662Uincrease local thicknessEnhance the ability to withstand air internal pressureUnderground chambersTunnel liningReinforced concreteRebar
The utility model relates to the field of compressed air energy storage, in particular to a lining structure enabling a compressed air energy storage artificial chamber to adapt to temperature deformation, which comprises a steel plate lining arranged on the inner wall of the chamber, an annular bulge is arranged on the inner wall of the chamber along the normal direction of the chamber, and an annular structural joint is arranged in the annular bulge. According to the utility model, special structural design is carried out on the steel plate lining and the reinforced concrete lining at the structural joint, so that the steel plate lining can maintain structural stability at the structural joint when bearing temperature load and larger air internal pressure, and the overall sealing effect of the gas storage is ensured. The steel plate lining is prepared into an n shape, the local thickness of the steel plate lining within the influence range of the structural joint is increased, and the air internal pressure bearing capacity of the steel plate lining at the structural joint is greatly enhanced; the structure shaped like the Chinese character'ji 'enables the steel plate lining to have a certain capability of longitudinal deformation after bearing temperature load. In this way, the overall sealing effect and the structural stability of the artificial chamber in the operation cycle are guaranteed.
Owner:CENT SOUTHERN CHINA ELECTRIC POWER DESIGN INST CHINA POWER ENG CONSULTING GROUP CORP
Blow molding device for PE film processing and blow molding process thereof
The invention relates to the technical field of blow molding devices, and discloses a blow molding device for PE film processing and a blow molding process thereof.The blow molding device comprises a supporting frame and a first fixing plate arranged on the right side of the supporting frame, the blow molding device is arranged on the supporting frame, and the blow molding device further comprises an adjusting part installed on the supporting frame; the number of the traction parts is two, and the two traction parts are both arranged on the first fixing plate; the guide part is mounted on the fixed plate I; the adjusting part comprises a transmission assembly, and the transmission assembly is arranged on the supporting frame; and a plurality of extrusion assemblies are arranged. By arranging the adjusting part, the problems that in the using process of an existing blow molding device, fine adaptation is difficult to conduct according to the material hardness and the thickness specification of a PE film, excessive adjustment is likely to occur, the extrusion force is too large, and the film is excessively stretched, longitudinally deformed, thinned and even torn in the traction process are solved.
Owner:CHONGQING RUITING PLASTIC
A strike-slip fault system simulation device
This invention discloses a strike-slip fault system simulation device, relating to the field of petroleum and natural gas geology. The invention includes a support platform and several plexiglass rods arranged side-by-side on the support platform. Longitudinal constraint components are arranged on the front and rear sides of each plexiglass rod, and transverse constraint components are arranged on the front and rear sides of each plexiglass rod. The longitudinal and transverse constraint components form a deformable parallelogram constraint component. A longitudinal drive mechanism is provided on the support platform to drive the parallelogram constraint component and induce longitudinal deformation of the plexiglass rods. This invention features a simple structure and reasonable design, and through the longitudinal drive mechanism, it can accurately simulate the strike-slip fault system within a craton, thus solving the problem of the inability to simulate the structure of strike-slip fault systems within a craton.
Owner:PETROCHINA CO LTD
Cushioning springback shoe adopting nitrogen technology
PendingCN121943010AGuaranteed support effectNo complete restrictions on activitiesSolesStructural engineeringStrenuous exercise
A cushioning rebound shoe adopting nitrogen technology belongs to the field of air cushion shoes and structurally comprises a cushioning rebound sole, a vamp and a nitrogen insole positioning layer. The vamp is arranged at the upper end of the cushioning springback sole; the nitrogen insole positioning layer is horizontally arranged in the bottom of the vamp; a cushioning plate, a cushioning air cushion and an arch directional cushioning device are sequentially arranged in the cushioning rebound sole interlayer from top to bottom, an arch positioning portion at the top of the cushioning air cushion is connected with the nitrogen insole positioning layer in an embedded mode, a rigid-flex sandwich type arch supporting structure is formed under connection positioning of the cushioning plate, arch supporting performance is guaranteed, and meanwhile, the arch supporting effect is improved. And during strenuous exercise, the lower-layer cushioning air cushion guides longitudinal deformation through the deformation positioning groove to be matched with the upper-layer cushioning plate, and the cushioning resilience performance is effectively improved through cooperative work of the lower-layer cushioning air cushion and the upper-layer cushioning plate.
Owner:FUJIAN GOOD BROTHER SPORTS GOODS CO LTD
Correlation modeling method for in-situ measurement of deformation of rivet under load and failure point location of rivet
PendingCN121598592ADesign optimisation/simulationSpecial data processing applicationsUltimate tensile strengthMechanics
The invention discloses a rivet under-load deformation amount in-situ measurement and failure point location correlation modeling method, which comprises the following steps: after riveting deformation of a structural member, carrying out in-situ measurement on the deformation amount under the condition that a rivet section area is under load to obtain an axial deformation amount curve of a feature point set along an outer contour line of the rivet in the rivet section area; decomposing the axial deformation amount of the feature point into a transverse expansion amount and a longitudinal deformation amount, and constructing a correlation degree measurement model for quantifying the correlation between the deformation amount and the failure point location in combination with the coordinates of the failure point location; in the modeling process, based on Hooke's law and Poisson's ratio definition, establishing a relationship between the transverse expansion amount and the transverse stress of the feature points; based on the Hooke's law and the yield strength plastic deformation rule, the relation between the longitudinal deformation amount and the longitudinal force of the feature points is established; and combining the influence of the axial deformation of the feature point and the weighting and section shape of the distance measurement of the failure point location on the failure point location so as to obtain the correlation degree measurement model.
Owner:SHENYANG AIRCRAFT CORP
Methods, systems, equipment and media for construction safety assessment of shield tunnels
ActiveCN121031028BGeometric CADDesign optimisation/simulationNonlinear deformationArchitectural engineering
This invention relates to the field of underground engineering technology and discloses a method, system, equipment, and medium for construction safety assessment of shield tunnels. The method quantifies the construction load and foundation coefficient in the current construction step and inputs them into a nonlinear mechanical solution framework composed of a longitudinal multi-ring model and a single-ring variable model. This process obtains the longitudinal deformation of each beam element. If the deformation does not meet preset requirements, the quantification process is repeated until the preset requirements are met. The bending and shear modes of each beam element are determined based on the single-ring variable model to assess the safety status of the current construction step. The current construction step is updated, and the assessment process for the safety status of the updated step is iteratively executed until all construction steps are completed, resulting in a safety assessment of the shield tunnel under construction loads. The method accurately solves for the nonlinear deformation response in the longitudinal direction of the shield tunnel and achieves a comprehensive and accurate safety assessment of the shield tunnel.
Owner:SUN YAT SEN UNIVERSITY SHENZHEN +1
A method for preventing cracks in thick-walled stainless steel clad steel plate welding
ActiveCN117020460BAbrasive machine appurtenancesAbrasive blasting machinesSand blastingStructural engineering
This invention provides a method for preventing cracking during welding of thick-walled stainless steel composite plates, specifically including: controlling deformation of the composite plate caused by rust removal, correcting deformation of the composite plate, controlling crack prevention during welding, and controlling welding quality. Compared to shot blasting, sandblasting can control the longitudinal deformation of the composite plate within 20mm. After leveling the steel plate with a multi-roller leveling machine, a counterweight pressure method is used to correct the deformation at warped positions to a flatness of 5mm / m. A method of cooling, inspecting, and confirming no cracks in each weld pass before proceeding to the next weld pass is adopted, using a transition layer and cladding layer, to detect welding defects early and improve the welding pass rate. Analysis and summary suggest that a suitable construction scheme for large composite plate storage tanks, strengthening rust removal and deformation prevention stress during on-site composite plate construction, improving welding management, and increasing post-weld inspection and control are effective means to improve the welding pass rate, accelerate construction progress, and reduce construction costs.
Owner:CHINA NAT CHEM ENG NO 14 CONSTR
Tire capable of improving wet grip performance and operation stability
The utility model discloses a tire capable of improving wet grip performance and operation stability, which relates to the technical field of tire patterns and comprises a central area, transition areas are symmetrically arranged on two sides of the central area, a tire shoulder area is arranged on one side of each transition area, and pattern main grooves are arranged between the central area and the transition areas. According to the automobile tire, the inclined angles of 10 degrees are arranged at the bottoms of the pattern main grooves and the bottoms of the pattern side grooves, and the reinforcing bosses are arranged in the pattern side grooves, so that the thickness of rubber materials at the bottoms of the ribs in the transition area is increased, and the thickness of the rubber materials at the bottoms of the ribs in the transition area is increased; and meanwhile, the distance between the transverse cutter grooves in the center area is smaller than that between the transverse cutter grooves in the transition area, so that the rigidity of pattern ribs in the transition area is reduced on the premise that sufficient longitudinal deformation is guaranteed, and the risk of shimmy is reduced.
Owner:SHANDONG LINGLONG TIRE CO LTD
Fabricated civil air defense sheltering house
PendingCN121953413ALighting and heating apparatusSpace heating and ventilation detailsStructural engineeringMechanical engineering
Owner:SICHUAN ZHUDUN CIVIL AIR DEFENSE ENG EQUIP CO
Deformation detection device and method for bridge guardrail
The invention relates to the technical field of bridge monitoring, in particular to a deformation detection device and method for a bridge guardrail. The deformation detection device of the bridge guardrail comprises a transverse detection assembly and a longitudinal detection assembly. The transverse detection assembly comprises a laser emitting part, a laser receiving part and a moving mechanism, the laser emitting part and the laser receiving part are driven by the moving mechanism to move in the extending direction of the guardrail, segmented transverse deformation detection in the full length range of the guardrail is achieved, and hidden deformation caused by omission of a middle area is avoided; the longitudinal detection assembly is used for detecting the longitudinal deformation of the guardrail, the longitudinal detection assembly and the transverse detection assembly form a transverse and longitudinal two-way detection system, the deformation position and degree are accurately positioned, the integrity and accuracy of guardrail deformation detection are remarkably improved, and reliable data support is provided for guardrail maintenance.
Owner:HUNAN LINXI CONSTRUCTION ENGINEERING CO LTD