79 results about "Axial deformation" patented technology

The invention relates to the technical field of deformation detection, in particular to a method for measuring the deformation of a rotary body part, which comprises the following steps of: arranging measuring points on a target rotary body part, and performing dotting measurement by using a three-coordinate measuring instrument to obtain dotting data which are three-dimensional coordinates; based on the dotting data, calculation is carried out, and deformation information of the target rotary body part is obtained, the calculation comprises the steps of determining a data source, normalizing coordinates, converting a coordinate form, sequencing path measuring points, compensating a measuring head, calculating a position-error function, calculating all-directional axial deformation and radial deformation, speculating all-position deformation, and performing any combination calculation in multi-coordinate system data integration. According to the invention, the deformation of the rotary part can be measured conveniently, quickly and efficiently.

The invention discloses a concrete column axial deformation identification method and system based on a visual image, and relates to the technical field of building structure monitoring, and the method comprises the steps: collecting a continuous image sequence of a concrete column from different sides; edge detection and morphological processing are carried out on the continuous image sequence, the overall contour of the cylinder is extracted, the axial center line of the cylinder is fitted, and global axial length change features are generated; executing adjacent frame tracking identification of the local evaluation center point, and establishing a first local deformation feature; performing local deformation feature extraction of the convolutional neural network, and establishing a second local deformation feature; and hierarchical fusion is carried out, and an axial deformation identification result is established. According to the invention, the technical problems of one-sided deformation information, insufficient monitoring precision and poor reliability caused by single feature extraction of the axial deformation of the concrete column in the prior art are solved, and the technical effects of realizing multi-source feature fusion identification of the axial deformation of the concrete column and improving the precision and reliability of deformation monitoring are achieved.

The invention relates to the technical field of tool clamps, and discloses a flexible clamp suitable for large-diameter thin circular ring part machining and a using method.The flexible clamp comprises a flexible clamping jaw, the flexible clamping jaw comprises an assembly frame fixedly connected with a rotary table and provided with a guide rail, and the guide rail is movably connected with two supporting frames capable of moving in the radial direction; the two sets of supporting frames are each provided with a fan-shaped claw with a fan-shaped step, a clamping oil cylinder is arranged between the two sets of supporting frames, locking oil cylinders are arranged on the side walls of the supporting frames, and the locking oil cylinders stretch out to be tightly attached to the assembly frame to achieve locking of the positions of the supporting frames. According to the flexible clamp suitable for machining the large-diameter thin circular ring piece and the using method, nine sets of flexible clamping jaws are evenly distributed on a circular ring belt, clamping is conducted in the radial direction inside and outside, the stress area is increased, deformation is reduced, and the high-precision machining requirement is met; a passive automatic auxiliary supporting technology is adopted, supporting is achieved through opening and closing of the fan-shaped claws, the device adapts to high-precision machining of poor planeness or blank face positioning, and axial deformation and vibration are avoided.

The invention relates to the technical field of rock mechanics and underground engineering, in particular to an anchored jointed rock mass multi-field coupling creep characteristic analysis method which comprises the following steps: preparing anchored rock mass samples which are corroded by inorganic salt and contain different joint occurrences, and installing different pre-stressed anchor rods. And carrying out a graded loading creep compression experiment, and synchronously collecting axial deformation and acoustic emission signals. And drawing a creep time-history curve based on deformation data, and determining long-term strength and a creep stage by adopting a steady-state creep rate method. And calibrating the crack initiation and expansion process of the crack at each stage of creep deformation by using an acoustic emission signal. And analyzing response differences between crack development and anchoring failure under different inorganic salt components, concentrations, joint occurrence and prestressing forces, and determining the influence degree of each factor on the anchor rod support effect in each creep deformation stage. According to the method, synchronous quantitative analysis of macroscopic creep characteristics and microscopic damage evolution is realized by coupling chemical corrosion and prestress action, and the accuracy of long-term strength prediction and anchoring failure mechanism understanding is improved.

The invention belongs to the technical field of restrained braces, and particularly relates to a viscoelastic double-step all-steel buckling restrained brace which comprises an outer sleeve, two viscoelastic devices, a core plate and a limiting structure, the outer sleeve, the two viscoelastic devices and the core plate are arranged, and the two viscoelastic devices are embedded in the inner side and the outer side of the two ends of the outer sleeve respectively; the viscoelastic material can absorb and dissipate energy generated by earthquakes or wind loads through shear deformation, the vibration response of a structure body is effectively reduced, the anti-seismic performance of a building is improved, the core plate movably penetrates through the viscoelastic device and is arranged in the outer sleeve, the core plate is preliminarily restrained through the outer sleeve, and the anti-seismic performance of the building is improved. According to the limiting structure, the side plates and the multiple limiting plates are matched to limit the core plate, lateral displacement of the core plate can be limited, bending instability of the core plate in the stress process is prevented, it is ensured that the core plate is mainly subjected to axial deformation all the time, and the anti-seismic property of the viscoelastic device is fully exerted.

The invention discloses a soft clay cyclic reconsolidation characteristic test method and device, and the method mainly comprises the steps: applying an axial cyclic load, and dynamically adjusting the lateral boundary constraint condition of a sample according to an independent control logic to simulate an actual stress path; synchronously collecting axial deformation, a lateral strain field, pore water pressure and an acoustic emission signal of the sample; and then characteristic parameters are calculated in real time based on the multi-physics field data, and a test process is automatically decided according to a preset criterion. According to the soft clay cyclic reconsolidation characteristic test method and device provided by the invention, the field boundary condition can be simulated more truly, and multidimensional state monitoring and intelligent test control from macroscopic to microscopic can be realized.

The invention discloses a large-caliber reflector axial supporting structure with a temperature compensation function, and belongs to the field of optical element supporting, the large-caliber reflector axial supporting structure comprises a large-caliber reflector body, a heterogeneous material composite supporting column, a corrugated pipe compensation device and a supporting base, the heterogeneous material composite supporting column adopts an'inner-layer core column-outer-layer sleeve 'coaxial nesting structure, and the corrugated pipe compensation device is arranged on the inner-layer core column; the low-expansion core column and the high-expansion sleeve are fixed through interference fit and laser welding to form an integrated supporting unit, and complementation of the low-expansion core column and the high-expansion sleeve is achieved through material selection. Through the material combination of the low-expansion core column and the high-expansion sleeve, the overall axial deformation quantity of the supporting column is reduced, the mirror surface shape precision RMS of the reflector in a wide temperature range is smaller than or equal to lambda / 50 (lambda = 632.8 nm), and the thermal stress offset effect is remarkable; a thermal stress counteracting mechanism of the composite supporting column is combined with residual deformation compensation of the corrugated pipe, so that the supporting force fluctuation range is controlled within + / -3%, and mirror surface loosening or deformation caused by long-term use is avoided.

The application provides an anchor rod deformation monitoring structure based on cable sensing and a use method, and relates to the technical field of underground engineering monitoring.The anchor rod structure comprises an anchor rod body, a coaxial cable, a joint presser, a connector and a terminal load, the coaxial cable is provided with a distributed Fabry-Perot strain sensor, the coaxial cable and the anchor rod body are mutually bonded, one end of the coaxial cable is connected with the terminal load through an SMA joint connector, the other end of the coaxial cable is connected with a vector network analyzer through an SMA joint connector after being led out from an anchor rod tray, and the joint presser is arranged on the bonding section of the coaxial cable and the anchor rod and generates a characteristic impedance discontinuity.The anchor rod can be used for monitoring and analyzing the axial deformation, bending deformation and breakage of the anchor rod, realizes real-time monitoring of the axial deformation and bending deformation of the anchor rod without affecting the reinforcement effect of the anchor rod, and has the advantages of wide application range, resistance to high-temperature and high-pressure liquid environment, small transmission loss, high spatial resolution and the like.

The invention discloses a large-size rotary cylinder which comprises an outer wall and an inner wall of a cylindrical structure with a wing-shaped section, and two groups of corresponding ends of the outer wall and the inner wall are connected; the outer wall is defined by sequentially connecting a plurality of outer wall sections, the inner wall is defined by sequentially connecting a plurality of inner wall sections, and the outer wall sections and the inner wall sections are both of a sandwich structure formed by wrapping a foam core material with composite skin; and a first parting surface between the two outer wall sections and a second parting surface between the two inner wall sections are staggered from each other. The composite material barrel is applied to the field of composite material barrels, so that the barrel has higher structural strength and axial deformation resistance, other auxiliary supporting devices are not needed except that the bottom of the barrel needs to be supported by a fixed base, the occupied space is greatly saved, and the assembly difficulty is reduced.

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 application discloses a temple connecting structure and a head-mounted display device. The head-mounted display device comprises a frame and two temples arranged at two ends of the frame. The temple connecting structure comprises a mounting member, an elastic member and a connecting member. The mounting member is fixedly connected to the frame. The elastic member is mounted on the mounting member and is configured to be in an axial deformation state. The connecting member is fixedly connected to the temple and is rotatably connected to the mounting member. The rotation axis of the connecting member intersects with the axial direction of the elastic member. The elastic force of the elastic member can act on the connecting member, thereby providing a clamping force for the temple. When the connecting member is turned outward from an open position, the elastic deformation amount of the elastic member and the angle between the axial direction of the elastic member and the mounting member can be changed, so that the amplitude fluctuation of the clamping force is kept within a preset percentage. The technical scheme of the application aims to make the clamping force of the temple more stable in the wearing state, thereby improving the wearing comfort of the temple.

The invention relates to an electric iron member tension test device, which relates to the related technical field of material tension test, and comprises a base, an extrusion seat, a positioning mechanism, a hanging piece, a detection mechanism, a sliding plate, a sliding seat, a trigger mechanism, a clamping mechanism, a dynamometer and a hydraulic jack, the problem that eccentricity of the U-shaped hanging ring after being placed is not considered in the placing process in the prior art can be solved, eccentric loading can cause single-side stress concentration of the hanging ring, actually-measured fracture load is possibly lower than a true value, product quality is misjudged, the hanging ring can be accompanied by additional bending moment during eccentric stress, non-axial deformation is caused, calculation of parameters such as elasticity modulus is interfered, and the product quality is influenced. The problems that metal fragments tend to be sprayed to the stress concentration side during asymmetric fracture, the personnel injury probability is increased, the axial direction of the high-quality U-shaped hanging ring is in a symmetrical deformation state under pure pulling force, and if abnormal lateral bending occurs, the situation of inclusions in materials or uneven heat treatment can be possibly indicated are solved.

The application belongs to the field of rock mechanics test equipment, and particularly relates to a rock deformation direct measurement device under high temperature and high pressure environment, aiming to solve the technical problem that the prior art cannot directly and accurately measure the axial and radial deformation of rock under high temperature and high pressure. The device comprises a triaxial pressure chamber, an axial deformation direct measurement assembly and a radial deformation direct measurement assembly. The axial and radial deformation direct measurement assemblies are both arranged in the triaxial pressure chamber, and each comprises a sensor for directly measuring the axial and radial deformation of a rock sample, and an independent cooling structure for locally cooling the sensor. The built-in circulating cooling system is used to ensure the stable work of the sensor under high temperature and high pressure environment. The application realizes direct and high-precision measurement of rock deformation, effectively eliminates additional errors such as pad deformation, can accurately obtain key mechanical parameters such as elastic modulus and Poisson's ratio of rock, and meets the test requirements in the field of deep energy development.

The utility model provides a tensioning device of a spiral superconducting coil. The tensioning device of the spiral superconducting coil comprises a coil framework and a pressing assembly. The whole coil framework is columnar, the superconducting coil is wound on the coil framework in the axial direction of the coil framework, the compressing assembly sleeves the periphery of the superconducting coil in the axial direction of the coil framework, and the superconducting coil is clamped between the peripheral surface of the coil framework and the inner wall surface of the compressing assembly; in other words, the pressing assembly and the coil framework are located on the inner side and the outer side of the superconducting coil respectively, so that the superconducting coil is pressed and limited, and axial deformation or radial deformation of the superconducting coil can be prevented. The pressing assembly comprises a plurality of protection components which are sequentially arranged in the axial direction of the coil framework, the opposite ends of every two adjacent protection components are connected together in an inserted mode in the axial direction of the coil framework through a first insertion structure, the size of each single protection component is smaller, the single protection component is lighter, the assembling flexibility is improved, and the assembling efficiency is improved. And axial stress generated when the superconducting coil works can be dispersed through the plugging mode of the first plugging structure.

This invention relates to the field of gas pipeline design technology, specifically a mechanical model and design method for long-distance and urban gas pipelines. The former includes constructing a sub-model for the design wall thickness of straight pipe sections using design specifications and selected yield strength values; constructing a sub-model for the design wall thickness of bends by combining the comparison rules between pipeline design pressure and gas transmission pipeline pressure parameters; constructing a corresponding stability calculation and verification model based on the relationship between the load projected per unit length of the pipeline by external forces and the bearing capacity of the foundation; ignoring the variation in Poisson's ratio at the maximum internal pressure of the pipeline, constructing a sub-module for calculating and verifying the equivalent stress of straight pipe sections; and introducing the axial deformation stress caused by temperature changes on bends, constructing a sub-module for calculating and verifying the equivalent stress of bends. This invention avoids the problems existing in gas pipeline engineering design based solely on design specifications, and is more consistent with actual site conditions in stability calculation and verification, equivalent stress calculation and verification, etc., thus improving the rationality of long-distance and urban gas pipeline design.

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.

The invention provides an axial cone roller lagging feeding control method and system in radial-axial ring piece rolling. The method comprises the steps that a rolling process kinematics model is established; axial cone roller lagging feeding time sequence control is carried out in the rolling process kinematics model; and according to the size of the ring piece and a rolling process kinematics model, the speed of lag feeding time sequence control is modified. According to the method, the time sequence of radial deformation and axial deformation is coordinated, the elastic rebound fluctuation of the ring piece in the rolling process is reduced, the contact state of the ring piece and the conical roller is improved, equivalent plastic strain distribution is more uniform, and the structure refining degree is improved; the problem of mesh distortion in finite element simulation is avoided, a reliable process scheme is provided for near-net forming of the large ring piece, and the subsequent machining cost is reduced; the method is suitable for difficult-to-deform materials such as 2195 aluminum lithium alloy and titanium alloy, and the application range of the radial-axial ring rolling process is widened.

A novel bidirectional bearing honeycomb anti-creeper relates to the technical field of anti-creeper, and comprises a mounting base, a buffer assembly and anti-creeper teeth, the mounting base is connected with the buffer assembly, the buffer assembly is connected with the anti-creeper teeth, the buffer assembly comprises a thin-wall shell and a bidirectional bearing corrugated honeycomb structure, the bidirectional bearing corrugated honeycomb structure is arranged in the thin-wall shell, and the anti-creeper teeth are arranged in the thin-wall shell. The thin-wall shell comprises a side plate, an upper skin and a lower skin, the upper skin is combined with the upper surface of the side plate, and the lower skin is combined with the lower surface of the side plate. The variable amplitude sine wave is introduced in the axial direction on the basis of a traditional honeycomb cell element, the bending angle is added in the radial direction, the oneness of the bearing direction of a traditional honeycomb is broken through, the honeycomb can bear longitudinal loads, and the bearing capacity in the vertical direction is remarkably improved. Compared with a traditional honeycomb anti-creeper, the energy absorption capacity is higher, axial ordered deformation can be kept when the anti-creeper resists vertical force, and dependence on a traditional drawer guide mode is eliminated.

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.

The present application relates to the technical field of civil engineering energy dissipation and shock absorption, and particularly relates to a partially self-resetting frictional damping double-sleeve device and a device parameter calculation method. Through the mutual cooperation of the inner sleeve and the outer sleeve, basic structural support is provided for the entire device. The planar frictional damper and the recoverable slope frictional damper are innovatively combined and distributed in a cross shape around the sleeve, and can respond to the axial deformation of the inner sleeve in all directions. Under the action of an earthquake or accidental gravity load, the recoverable slope frictional damper and the planar frictional damper work cooperatively to consume the potential energy of the axial deformation of the inner sleeve, effectively solving the buckling problem of the tensile string truss structure. At the same time, the energy dissipation capacity compensates for the defect of insufficient energy dissipation of the structure, and the improved stiffness also makes the structure more stable. Moreover, they can also generate a reverse force to reset the inner sleeve, significantly enhancing the recoverable performance of the structure under special loads, and guaranteeing the safety and reusability of the tensile string truss structure under extreme conditions.

The application discloses a vibration suppression optimization method and system for a high-rigidity gantry machine tool spindle, and relates to the technical field of data processing. The method comprises the following steps: performing structural optimization preprocessing on the spindle of the gantry machine tool according to a spindle optimization mechanism to obtain a target spindle; activating a distributed temperature detector to perform dynamic and continuous temperature monitoring on the target spindle to obtain real-time temperature information; when the real-time temperature information reaches a predetermined intervention constraint, starting a circulating oil cooler to perform emergency cooling processing on the target spindle, synchronously generating an axial deformation correction decision, and calculating a real-time axial compensation amount to suppress vibration of the target spindle. The application solves the technical problem that the axial deformation and vibration of the spindle caused by temperature rise in the prior art during high-speed cutting, which leads to a decrease in machining precision and instability of the machine tool, and achieves the technical effect of effectively reducing deformation caused by temperature and suppressing vibration of the spindle, thereby improving the machining precision and stability of the machine tool.

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.

The invention relates to a while-drilling electrical connection device. The while-drilling electrical connection device comprises a telescopic assembly and a sealing assembly. The telescopic assembly comprises an outer cylinder used for connecting the first connector assembly and the limiting pipe, an inner cylinder and a corrugated pipe, and the first connector assembly, the limiting pipe and the corrugated pipe jointly define a first cavity between the outer cylinder and the inner cylinder. The sealing assembly comprises a first sealing piece used for fixing the upper end of the corrugated pipe to the outer wall of the inner cylinder in a sealed mode and a second sealing piece used for fixing the lower end of the corrugated pipe to the upper end of the limiting pipe in a sealed mode. The first sealing piece and the second sealing piece jointly define a second cavity between the inner cylinder and the corrugated pipe, and the second cavity communicates with the external space. When the first sealing piece and the second sealing piece move in the axial direction of the inner cylinder, the static sealing state can be kept all the time, the corrugated pipe deforms in the axial direction, and therefore the first cavity and the second cavity are separated. And compared with dynamic sealing, static sealing has better sealing stability, and the while-drilling electrical connection device can be better applied to underground high-temperature, high-pressure and vibration working conditions.

The present application provides a kind of coal rock characteristic load determination method, device, equipment and storage medium, comprising: the deformation parameter corresponding to each collection time obtained by collecting in the process of coal rock sample test is acquired;According to the deformation parameter corresponding to each collection time, the volume deformation and crack volume deformation corresponding to each collection time are calculated;Based on the corresponding relationship between the axial load, axial deformation, hoop deformation, volume deformation and crack volume deformation corresponding to each collection time, the characteristic value of the multiple characteristic loads corresponding to coal rock sample test is determined.The scheme of the present application improves the accuracy of coal rock characteristic load.

This invention provides a composite vibration damping column and its manufacturing method. It is composed of a sleeve-type composite spring and a vibration damping column body made of polymer material. A sleeve is externally disposed on the spring body to form a sleeve-type composite spring. The sleeve and the polymer material are fused together. In the composite vibration damping column, the spring body and the polymer material are not bonded together, allowing relative movement between the spring body and the vibration damping column body made of polymer material. This results in a parallel stiffness relationship between the outer polymer material and the spring body, improving the spring's stiffness and preventing torsional deformation during axial deformation. Furthermore, because the spring body is encased in polymer material, it is not easily corroded and has good durability, making it suitable for environments with severe acid and alkali corrosion.

The invention discloses an electric cylinder structure optimization design method based on a grey wolf optimization algorithm, and relates to the technical field of mechanical design. The method comprises the steps that firstly, the requirement is determined, an axial deformation static model of the electric cylinder is established, push rod axial deformation, ball screw contact deformation, lead screw tensile deformation and bearing axial deformation are regarded as the series relation, and the total deformation amount is calculated; then, selecting structural parameters such as the length of a push rod and the effective stroke of a lead screw as design variables, constructing coupling constraint conditions among the design variables, and establishing an optimization model by taking minimization of total axial deformation and reduction of material consumption as targets; a grey wolf optimization algorithm is used for simulating the processes of surrounding preys, hunting and position updating by grey wolves, and optimal design parameters are searched for iteratively; the axial deformation is reduced, the overall rigidity is improved, and the manufacturing cost is reduced. According to the method, an intelligent optimization algorithm is combined with mechanical structure design, the design efficiency of the electric cylinder is improved, the balance between performance and cost is optimized, and the method is suitable for high-precision linear driving equipment.

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.