14 results about "Axial deformation" patented technology

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.

This invention belongs to the field of drive shaft turning technology, specifically a drive shaft step turning machine tool and turning process. Addressing the issue that drive shafts generate heat and undergo axial deformation during turning, making it difficult for the tailstock to effectively handle this deformation, potentially leading to drive shaft bending and failure, the invention proposes the following solution: a turning frame with two guide rails on it, on which the same tailstock is slidably mounted; and two linear lead screws symmetrically positioned on both sides of the turning frame. This drive shaft step turning machine tool improves the turning effect. During turning, after the tailstock clamps the drive shaft, it provides a certain amount of axial movement to the tailstock, preventing bending and failure due to insufficient axial space when the drive shaft undergoes thermal axial deformation during turning, thus improving the overall performance of the device.

This utility model discloses an auxiliary tooling for measuring the axial deformation of tapered roller bearings, relating to the field of bearing testing technology. It includes a pressure sleeve, a bearing ring, a support base, and a dial indicator. An annular boss is provided in the middle of the outer wall of the pressure sleeve. The bearing ring is interference-fitted to the bottom of the pressure sleeve. A groove for placing the bearing to be tested is provided on the upper surface of the support base. The lower end face of the bearing ring abuts against the upper end face of the bearing to be tested. A bracket is provided on the support base, and the dial indicator is fixedly mounted on the bracket with its probe abutting against the upper end face of the annular boss on the pressure sleeve. This utility model transmits the pressure applied by a press to the bearing to be tested, causing axial deformation. The dial indicator then accurately measures the displacement of the pressure sleeve, thereby indirectly obtaining the axial deformation measurement of the bearing. This facilitates specific statistical analysis of the axial displacement. The required materials are readily available, processing is convenient, costs are saved, and work efficiency is improved.

The present application relates to the technical field of rock slope engineering, and provides a rock slope anchoring system and a construction method, the system comprising a plurality of adaptive deformation connecting structures and a plurality of anchoring structures corresponding one by one, the plurality of adaptive deformation connecting structures being arranged at intervals on the slope surface; two adjacent adaptive deformation connecting structures being connected through a connecting beam, the anchoring structure being arranged in an anchoring hole; one end of the anchoring structure being anchored at the bottom of the anchoring hole, and the other end being exposed and connected with the corresponding adaptive deformation connecting structure; the part of the anchoring structure in the anchoring hole having a pressure-relief section, which can absorb rock mass displacement through axial deformation, so as to avoid the anchoring structure from being broken due to tensile stress exceeding the limit; the adaptive deformation connecting structure and the connecting beam being connected in sliding fit, so that the adaptive deformation connecting structure can displace along the slope surface relative to the connecting beam, and the local pressure-relief capacity in a single anchoring hole is transmitted to the entire slope surface, thereby improving the long-term stability of the rock slope in complex environments such as heat and humidity.

This application provides a method for calculating the equivalent thickness of a high-curvature panel, belonging to the field of aerospace structural strength calculation technology. The method includes: Step S1, constructing a curved bar model of the high-curvature panel under axial tension and determining the parameters of the curved bar model; Step S2, obtaining the axial deformation of the curved bar based on the curved bar model and its parameters; Step S3, constructing a straight bar model corresponding to the high-curvature panel and obtaining the axial deformation of the straight bar based on the straight bar model; Step S4, constructing a relationship expression between the equivalent height-to-thickness ratio and the overall height-to-thickness ratio based on the equality of the axial deformation of the curved bar and the axial deformation of the straight bar under the same axial force, obtaining the equivalent height-to-thickness ratio by fitting the curve of the equivalent height-to-thickness ratio changing with the overall height-to-thickness ratio under different bending angles α, and finally obtaining the equivalent thickness based on the equivalent height-to-thickness ratio. This application can improve accuracy while ensuring computational efficiency, and improves the efficiency of scheme iteration and parameter optimization.

This invention discloses a method and system for controlling settlement deformation of gravity-type wharves based on axial deformation coordination, belonging to the technical field of port and waterway engineering structures. The method includes: determining soil mechanical parameters based on an empirical database; performing elastoplastic finite element calculations combined with the wharf load distribution to obtain the independent settlement deformation results of each structural segment over time; weighted summing of the independent settlement deformation results of a predetermined number of adjacent structural segments arranged continuously along the wharf axis to obtain the axial coordinated settlement deformation result; comparing the axial coordinated settlement deformation result with deformation control standards; if there is excessive deformation, a polling mechanism is used to identify the specific structural segment with the largest contribution, applying a preset reinforcement scheme to its foundation area to update the mechanical parameters, and iteratively calculating until the deformation control standard is met, outputting the final foundation reinforcement design scheme. This method can effectively improve the accuracy of long-term settlement assessment and the economic efficiency of reinforcement schemes for gravity-type wharves on soft soil foundations.

This application provides a method for calculating the axial tensile deformation of a large-curvature panel, belonging to the field of aerospace structural strength calculation technology. The method includes: Step S1, constructing an axial tensile model of the large-curvature panel and determining the parameters of the axial tensile model; Step S2, constructing an expression for the axial deformation of any half of the large-curvature panel based on the axial tensile model and its parameters; Step S3, obtaining the expression for the axial deformation of the large-curvature panel based on the two axial deformations of any half of the large-curvature panel, and performing axial tensile deformation calculation based on the expression for the axial deformation of the large-curvature panel. The method of this application can improve accuracy while ensuring computational efficiency, compensate for the shortcomings of conventional methods, and improve the efficiency of scheme iteration and parameter optimization.

This invention relates to a seismic prediction method for fractures and fissures in folded belt formations, belonging to the field of oil and gas exploration and development technology. The seismic prediction method for fractures and fissures in folded belt formations of this invention, by dividing the boundary points of the axial and limb regions, performing planar phase-controlled seismic adjacent channel gradient scanning, calculating the seismic trend volume of the formation, and then predicting the development of fractures and fissures in the formation, determines the distribution of fractures and fissures throughout the folded belt. This seismic prediction method for fractures and fissures in folded belt formations of this invention can reduce the impact of seismic axial deformation and large phase differences on the calculated fractures in the axial and limb regions, improve the influence of small phase changes and frequency decay, and mitigate the impact of discontinuities in the seismic phase axis caused by non-fracture factors due to the large slope of the limb slope, thus presenting the development information of fractures and fissures in the axial and limb regions of the folded belt formations.

This invention discloses a method, apparatus, equipment, and storage medium for testing the stress direction of a cylindrical surface with zero axial deformation, relating to the field of oil and gas field development engineering technology. The method includes the following steps: S1, taking a cylindrical core sample and obtaining its radius; S2, attaching strain gauges to both ends of the core sample, selecting a radius passing through the center of the end face as the starting point, and recording the angle between the strain gauge and this radius; S3, after attaching the strain gauges, covering the end face of the core sample with a uniform coating to create a proportionally enlarged cylindrical sample for testing, electrically connecting the strain gauges to a sensor; S4, applying hydrostatic pressure to the cylindrical sample in the radial direction and recording the data changes on the stress sensor; S5, based on the strain test results in S4, obtaining the two principal strain directions of the cylindrical sample. This method uses a small number of strain gauges to obtain the stress direction of the core sample on the horizontal plane, and the results are reliable, convenient, and low-cost.

The application discloses a fin effect clamp jaw force-deformation theoretical modeling method based on a co-rotation model, decomposes a fin effect clamp jaw structure into a plurality of beam units, decouples local deformation and rigid body motion of each beam unit through co-rotation theoretical modeling, respectively establishes an axial deformation model and a rotational deformation model, and introduces an effective length correction coefficient to consider the influence of physical hinge connection; a tangent stiffness matrix of the beam unit is constructed and assembled into a global tangent stiffness matrix; a Newton-Raphson iteration method is used to realize force balance solving of a load increment step, and a global force-displacement relationship is constructed; and through adjustment of a global node force vector, various planar load scenarios such as single-point, multi-point and distributed load are adapted. The application breaks through the limitation of small deformation assumption, accurately represents large deformation behavior, improves the calculation efficiency by hundreds of times compared with finite elements, controls the average error within 6%, can quantize the influence of structural parameters such as connection type, beam quantity, beam inclination angle and top angle, and provides a theoretical basis for fin effect clamp jaw engineering design.

The application discloses a truss bridge member internal force non-contact identification method and equipment based on three-dimensional laser point cloud shape change, which comprises the following steps: extracting the point cloud axial deformation variable of each member of the truss bridge, calculating the initial member internal force value of each member and the directional cosine of each direction at the node; distinguishing reliable nodes and unreliable nodes; converting the node external load value of the reliable node; taking the initial member internal force value of the member connected with the reliable node as the prior value, combining the node external load information and the node balance condition, and correcting the reliable node member internal force value through iterative optimization to obtain the corrected reliable node member internal force value; taking the remaining initial member internal force value as the prior value, the reliable node member internal force value as the determined value, combining the node balance condition, and performing the propagation type correction on the internal force value of each member of the unreliable node through iterative optimization to obtain the corrected internal force value of each member of the unreliable node. The application effectively improves the health monitoring efficiency and reliability.

This invention provides a method for correcting the measured values ​​of a cylindrical concrete stress gauge. It measures the axial deformation of concrete using a monitoring device with a built-in magnetic displacement gauge, then calculates the stress value of the measured concrete. Finally, considering the influence of the measuring device, concrete temperature changes, and its own volume deformation on the measurement results, the calculated concrete stress value is corrected to make the calculated result closer to the actual concrete stress value. Finite element simulation analysis verifies that the concrete stress value monitored using the method disclosed in this invention has a very small error compared to the actual value.

The utility model relates to a technical field of chemical equipment, concretely relates to a fiber winding glass steel equipment with rigidity reinforcing structure, including jar body main part, the middle part outside of jar body main part is equipped with first support ring and second support ring, first support ring is located the top of second support ring, it is equipped with a plurality of reinforcing plate with jar body main part is at the circumference equidistance between first support ring and second support ring, be equipped with corrugated board between every two reinforcing plate, corrugated board is located between reinforcing plate, and the plane stress is converted into three -dimensional bending stiffness with corrugated structure, and the radial stress of jar body is dispersed through self structure, and the rigid reinforcing band that surrounds jar body middle part is formed with reinforcing plate cooperation, makes up the defect that the fibre layer is thin in jar body middle part, and axial rigidity is insufficient, solves the problem that the rigidity of insufficient in the middle of existing equipment, significantly improves the bending -resistant, anti -axial deformation ability of jar body middle part, reduces the deformation such as bulging, bending due to long -term use, reduces the risk of leakage or burst.

This invention discloses a self-anchoring and self-compensating reinforcement device and method for multi-layer composite SMA; the device includes at least two sets of transition steel plates, multi-layer composite SMA plates, and connecting components; the transition steel plates are located on both sides of the potential propagation path of cracks in the steel structure; the multi-layer composite SMA plates include a self-locking and self-compensating SMA plate, a reinforcing SMA plate, and an installation component; the self-locking and self-compensating SMA plate needs to undergo pre-stretching and preheating excitation shaping treatment before assembly, and it has pre-stored shape memory recovery deformation capability; one end of the self-locking and self-compensating SMA plate is fixed to the reinforcing SMA plate, and the other end is fixed to the transition steel plate; the reinforcing SMA plate is then subjected to thermal excitation after assembly to generate active prestress for closing cracks in the crack tip region of the steel structure; when the reinforcing SMA plate experiences prestress loss during long-term service, the self-locking and self-compensating SMA plate compensates for the axial deformation loss of the reinforcing SMA plate, achieving prestress self-compensation without secondary thermal excitation.