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9 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.
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 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
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
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
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
Water conservancy project deformation monitoring method and system based on deep learning
PendingCN122262597Aimprove accuracyImprove stabilityMeasurement devicesBiological modelsResidual deformationControl engineering
This invention discloses a deep learning-based method and system for monitoring deformation in hydraulic engineering projects, belonging to the field of hydraulic engineering deformation monitoring technology. The method specifically includes: collecting a hydraulic engineering deformation monitoring dataset, organizing the monitoring data into a benchmark format to obtain a sequence of total deformation at monitoring points, a sequence of structural attribution of monitoring points, a sequence of operating condition characteristics, and a sequence of operating condition stages; constructing a back-loop closed-loop separation network based on the sequence of total deformation at monitoring points, the sequence of operating condition characteristics, and the sequence of operating condition stages to obtain a sequence of recoverable operating condition response deformation at monitoring points and a sequence of initial and residual deformation at monitoring points; and constructing a partition boundary-preserving graph neural inference network based on the sequence of total deformation at monitoring points, the sequence of recoverable operating condition response deformation at monitoring points, the sequence of initial and residual deformation at monitoring points, and the sequence of structural attribution of monitoring points to obtain the hydraulic engineering deformation monitoring results. This application improves the accuracy and stability of hydraulic engineering deformation monitoring results.
Owner:JIANGSU WATER CONSERVANCY SCI RES INST
Non-contact measurement method and device for caster bearing compression springback deformation
The present application relates to the technical field of caster measuring, in particular to a non-contact measurement method and device for the compression and rebound deformation of a caster, which comprises the following steps: a light projector projects light stripes on the caster in an unloaded state and a loaded compression state to generate first reference data and second reference data, and performs point-by-point difference and extracts deformation to generate a compression deformation index; a sequence of stripe images of the caster in a rebound process after unloading is collected to generate third reference data, which is subjected to point-by-point difference with the first reference data to extract deformation and generate a rebound comprehensive index; a lag ratio calculation is performed on the compression deformation index and the rebound comprehensive index to generate a residual deformation signal, and a difference ratio calculation is performed on the residual deformation signal and the compression deformation index to obtain a measurement result. The present application realizes non-contact and real-time measurement of the micro deformation of the caster in the whole process of heavy load compression and unloading rebound, and solves the technical problems of poor repeatability, easy interference and inability to quantify long-term performance in the prior art.
Owner:ZHONG SHAN SHI FEI DA JIAO LUN YOU XIAN GONG SI
Self-resetting beam-column connection for weak-axis direction of column
PendingCN122129088ABuilding constructionsProtective buildings/sheltersFloor slabResidual deformation
This invention proposes a self-resetting beam-column connection node for the weak axis direction of a column, belonging to the field of seismic resistance technology for building structures. The node includes a column, a beam, a cover plate, and a shape memory alloy Ω-shaped damper. The upper flange of the beam is seamlessly connected to the upper stiffening rib of the column via the cover plate, allowing the beam to rotate around the upper flange end, preventing separation of the upper flange and effectively protecting the floor slab. A gap is reserved between the lower flange of the beam and the lower stiffening rib of the column, providing deformation space for the Ω-shaped damper placed within the gap. Furthermore, the thickness of the U-shaped section of the Ω-shaped damper is designed to be less than the thickness of the straight connection section, ensuring that deformation is concentrated in the U-shaped section of the damper, while the main beam and column remain elastic, achieving damage control. The hyperelastic properties of the shape memory alloy enable the damper to automatically reset while dissipating energy, significantly reducing residual deformation after an earthquake. This invention has the advantages of being easily assemblable and maintainable.
Owner:SOUTHEAST UNIV