300 results about "Bending stiffness" patented technology

The present invention relates to an umbilical cable bending stiffness testing device and method. The device comprises a workbench; a measuring groove is formed in the top of the workbench; a fixing assembly is arranged in the measuring groove, and the fixing assembly is used for fixing two ends of an umbilical cable; a mounting plate is fixedly connected to the bottom of the workbench; a mounting frame is fixedly connected to the upper surface of the mounting plate; a threaded rod is rotatably connected between the lower surface of the mounting frame and the upper surface of the mounting plate; obtained data is transmitted to a dynamic data acquisition system by means of a displacement monitor body; the dynamic data acquisition system calculates obtained parameters to obtain bending stiffness curves of the umbilical cable under different curvatures. Moreover, because the device is in rigid connection with the umbilical cable by means of two sets of hoops, the problem of stress concentration caused by flexible connection of a steel strand rope is avoided, and the rigid connection ensures that tensile loads can be applied to two points of the umbilical cable in a balanced manner during an experiment, thereby improving the accuracy of bending stiffness testing results.

The invention provides a shield tunnel construction period segment longitudinal dynamic floating prediction method, and relates to the field of shield tunnel segment floating prediction.The method comprises the steps that the static upward floating force and the dynamic upward floating force of a shield tunnel are calculated by considering the timeliness of slurry, and the characteristic of nonlinear change of the rigidity of a circular seam connector is considered; the method comprises the following steps: dividing bending-resistant and shearing-resistant deformation modes of a circular seam joint, further deducing bending rigidity and shearing rigidity of a tenon-type joint in each deformation stage, deducing a shield tail segment longitudinal floating prediction model of the circular seam joint in the shield tunnel construction period, and constructing a nonlinear iterative algorithm of shield tunnel longitudinal deformation according to the theories; and acquiring parameter data of actual engineering, and inputting the parameter data into the duct piece floating prediction model to obtain a duct piece floating value. By means of the method, accurate prediction of floating deformation of the shield tail segment in large shield tunneling can be achieved, an effective scientific basis is provided for large-diameter shield tunneling construction, the problems that parameter decision of shield tunneling machine operators is difficult, and the segment floating control effect is poor are solved, and structural diseases caused by too large floating of the shield tail segment are eliminated.

The invention discloses a rigid rod frequency ratio method axial force identification method. The method comprises the following steps: (1) according to engineering data, obtaining whether a rigid rod is a pressure rod or a pull rod, and obtaining related parameters of the rigid rod: the linear density m of the rigid rod, the length L of the rigid rod and the flexural rigidity EI of the rigid rod; (2) vibration signals of the rigid rod are collected on site through a vibration sensor, and multi-order frequency of the rigid rod is obtained through analysis; (3) selecting a corresponding method to calculate the frequency ratio of the rigid rod according to whether the rigid rod is a compression rod or a pull rod and boundary conditions, and calculating the axial force of the rigid rod through a frequency ratio method; and (4) checking the relative flexural rigidity xi of the rigid rod, and evaluating the axial force identification precision of the rigid rod. According to the method, a unified calculation method for identifying the axial force of the rigid pull rod and the pressing rod is established through a frequency ratio method, the method is easy to use and has good precision, and a practical new method is provided for identifying the axial force of the rigid rod.

The invention provides a reinforcing beam reinforced by adopting an out-of-service wind power blade and a method for determining the bending rigidity. According to the reinforcing beam, a plurality of grooves are formed in at least one surface of a reinforced concrete beam; the reinforcing layer comprises reinforcing ribs and a cement-based composite matrix, a plurality of protrusions are arranged on the surface of the cement-based composite matrix, the protrusions are arranged at intervals in the length direction of the cement-based composite matrix, and the protrusions are correspondingly embedded into the grooves, so that the reinforcing layer is connected with the reinforced concrete beam to obtain a reinforced concrete reinforced beam; wherein the reinforcing ribs are obtained by disassembling and cutting a main beam of the retired wind power blade. According to the reinforcing beam, the combining capacity of the reinforced concrete beam and the reinforcing layer is high, mutual slippage is avoided, the retired wind power blade composite material resources are utilized, the environment is protected, and the cost is saved while high-performance reinforcing treatment can be conducted on the damaged reinforced concrete beam structure or the reinforced concrete beam structure with insufficient bearing capacity.

A shaft for a golf club includes a tip end configured to couple to a golf club head; a butt end opposite to the tip end; and a butt end portion that extends in a butt-to-tip direction from the butt end by at least 50 mm and has an average rate of change of bending stiffness in a tip-to-butt direction, wherein a greatest rate of change of bending stiffness of the shaft in the tip-to-butt direction is at least 2.7 times the average rate of change of bending stiffness of the butt end portion.

The invention discloses a silicon carbide wafer detection device and method.According to the silicon carbide wafer detection device, a detection table is detachably and fixedly connected with a silicon carbide wafer, and the detection table is provided with a hollow part for containing the silicon carbide wafer; the silicon carbide wafer can have a space for generating elastic deformation along the axial direction of the silicon carbide wafer under the condition of being fixed; load is provided for the silicon carbide wafer through the pneumatic part of the detection unit, so that the silicon carbide wafer deforms in the axial direction of the silicon carbide wafer, the deformation quantity generated by the silicon carbide wafer in the axial direction of the silicon carbide wafer is detected through the detection part, and therefore the bending rigidity of the silicon carbide wafer can be calculated, and quantification of the rigidity of the silicon carbide wafer is achieved. And a reference basis is provided for the quality of the silicon carbide wafer.

The invention discloses an acoustic black hole structure and a vibration damping device.The acoustic black hole structure comprises an acoustic black hole body and a damping layer, the acoustic black hole body is provided with a uniform thickness area and an acoustic black hole area, the acoustic black hole area is provided with a plurality of grooves, the grooves are distributed from the first end to the second end of the acoustic black hole area, and the damping layer is arranged between the first end and the second end of the acoustic black hole area. The depths of the grooves are gradually increased in the direction from the first end to the second end, and the damping layer is arranged in the acoustic black hole area. By machining the groove in the acoustic black hole area, the local bending rigidity of the acoustic black hole body is changed, the bending wave speed of the acoustic black hole body is reduced, the acoustic black hole effect is achieved, due to the arrangement of the groove, the local resonance effect can be utilized, and then structural vibration suppression in the low-frequency range is achieved; the problem that a traditional acoustic black hole structure is poor in low-frequency-band vibration reduction effect is solved, in addition, thickness cutting of an acoustic black hole area of an original structure is avoided, and the manufacturing difficulty and the requirement for the precision of machining equipment are lowered.

The invention provides a parameter determination method and device for an elastic flywheel, a storage medium and electronic equipment, and the method comprises the steps: constructing an optimization model, and carrying out the solving calculation of the optimization model according to an optimization variable, a constraint condition and an optimization target, and obtaining a calculation result; wherein the optimization variables are the number of the middle diaphragms, the thickness of a single middle diaphragm and the position relation between any two middle diaphragms, the constraint conditions are the total thickness of the diaphragms and the minimum strength range of the diaphragms, and the optimization target is to minimize the bending rigidity of the middle diaphragms; the target solution of the calculation result comprises the target diaphragm number of the middle diaphragms, the target thickness of each middle diaphragm and the target position relation between any two middle diaphragms. According to the method, under the condition that the torsional rigidity is not changed, the bending rigidity and strength are flexibly controlled by flexibly combining the number of diaphragms, the thickness of the diaphragms, the arrangement sequence of the diaphragms and the like, so that the effects of high reliability and shafting centering compensation capability are considered.

The invention discloses an aircraft panel impact test boundary stiffness equivalent simulation method and device, and belongs to the technical field of aircraft ground tests. According to the equivalent simulation device, a local wall plate test piece is adopted to replace an overall fuselage frame to carry out an impact test, a supporting rack is arranged on a base, and a vertical rigidity simulation spring assembly and a bending rigidity simulation device are borne on the basis of the supporting rack; a torsional rigidity simulation spring assembly and a longitudinal rigidity simulation spring assembly are arranged on the bending rigidity simulation device, and a local wallboard test piece is installed on the bending rigidity simulation device. According to the simulation device, the boundary rigidity of the aircraft panel when the aircraft panel is impacted is decomposed into torsional rigidity, vertical rigidity and longitudinal rigidity, so that the boundary rigidity is converted into three groups of linear springs in different directions for rigidity simulation, accurate simulation of the boundary rigidity is ensured, decoupling of boundary rigidity simulation is also realized, and the simulation accuracy is improved. And the design difficulty of the test device is reduced.

The embodiment of the invention discloses a method for determining the dynamic response characteristics of power equipment in a damaged state, and the method comprises the steps: obtaining the structural damping ratio and the jth flexural rigidity ratio of the power equipment, and the ground motion acceleration at the jth moment and the ground motion acceleration at the (j + 1) th moment, which are inputted from the outside, and then determining the natural vibration frequency according to the jth flexural rigidity ratio, determining an acceleration increment, a speed increment and a displacement increment according to the natural vibration frequency, the structural damping ratio, the seismic acceleration at the jth moment and the seismic acceleration at the (j + 1) th moment, and finally determining an acceleration response at the (j + 1) th moment, a speed response at the (j + 1) th moment and a displacement response at the (j + 1) th moment according to the acceleration increment, the speed increment and the displacement increment; and different devices can be finely reinforced, so that the structural layout and the material selection are optimized, the anti-seismic performance of the devices is improved, and the vibration amplitude and the damage degree of the devices in an earthquake are reduced.

The invention discloses a frame structure design method based on rigidity reduction. The method comprises the following steps that 1, rod end bending moments Mb and Mc and axial force Nc of frame beams and columns are obtained through calculation; step 2, obtaining actual reinforcement areas Asb0 and Asc0, section sizes and concrete strength of frame beams and columns; 3, the equivalent stiffness Kb1 of the frame beam is obtained through calculation according to the formula Kb1 = Mb0.75y / phi b0.75y; 4, the equivalent stiffness Kc1 of the frame column is obtained through calculation according to the formula Kc1 = Mc0.75y / phi c0.75y; 5, comparing the equivalent stiffness of the frame beam and the frame column with the initial flexural stiffness, and ending after the deviation is less than or equal to 15%; 6, calculating a shear force design value of the frame beam, calculating stirrups needing to be configured for the frame beam, and rechecking a shear-resistant section; and 7, calculating a shear force design value of the frame column, calculating stirrups needing to be configured for the frame column, and rechecking a shear-resistant section. Compared with the prior art, an overall calculation model of the frame structure is established, the real rigidity of a structural member is obtained through multiple iterations, section reinforcement is optimized, and the reinforcement amount is reduced; and the overall anti-seismic performance is improved.

The invention provides a method and a system for analyzing influence of local loading and unloading on deformation of an existing shield tunnel, and relates to the field of influence of foundation pit construction on the existing tunnel. The method comprises the steps that shield tunnel vertical additional stress caused by foundation pit excavation is calculated through a Mindlin stress solution; analyzing the influence of the longitudinal axial force on the flexural rigidity and shear rigidity of the circular seam joint, and dividing a joint deformation mode into three stages according to the relative magnitude of the axial force and the bending moment and the vertical displacement between rings; a tunnel displacement control equation is established based on a Winkler foundation model, loop iteration is conducted through a state space method, and the rigidity of a circular seam joint is dynamically adjusted to be matched with the final deformation mode of the circular seam joint; and finally, constructing a prediction system, and outputting a deformation value of the shield tunnel by inputting the number of iterations and parameters of a foundation pit, bolts, concrete and segments. By means of the method, deformation prediction of the existing shield tunnel can be achieved for foundation pit construction, an effective scientific basis is provided for foundation pit engineering construction, the problem that parameter decision of operators on a construction site is difficult is solved, and foundation pit engineering site construction is truly guided.

The invention discloses a damage quantitative evaluation method based on an intelligent agent model and knocking scanning, and aims to realize accurate recognition and quantitative evaluation of beam structure damage through the agent model. The evaluation method comprises the following steps: firstly, according to a theoretical relational expression of a beam structure, selecting a cross-sectional inertia moment, a structure length, a damage position and a detection vehicle equivalent acceleration as input random variables, and taking a bending stiffness ratio of a damage position as a damage quantitative index, constructing and optimizing an agent model; establishing a nonlinear mapping relation between input and output; secondly, applying excitation by utilizing an intelligent knocking scanning detection vehicle, acquiring an acceleration signal, processing the signal by adopting a time-frequency analysis technology, and extracting feature information related to structural damage; and finally, predicting a damage quantitative index according to the agent model in combination with the identified damage position and feature data, and verifying and outputting a result.

The present application provides a pre-stressed anti-vibration hammer and a pre-stress determination method and system, the pre-stressed anti-vibration hammer comprising a gapped steel strand, an assembly integrated hammer head and an anchoring clamp, wherein the gapped steel strand comprises a central layer round wire, a middle layer molded wire and an outer layer round wire from inside to outside; a gap is provided between the central layer round wire and the middle layer molded wire, and the gap is filled with a lubricating grease, such that the friction resistance between the central layer round wire and the middle layer molded wire is reduced, and pre-applying a stress to the central layer round wire is facilitated; the middle layer molded wire is of an arch structure, and the arch body structure increases the moment of inertia for a circle center, such that the bending rigidity of the steel strand is enhanced; and two ends of the central layer round wire are connected with the assembly integrated hammer head, the anchoring clamp is assembled in a hollow portion of one end of the assembly integrated hammer head away from the central layer round wire, and is configured to clamp the central layer round wire to which a target stress is pre-applied, a tensile stress generated by an impact load firstly counteracts the tensile stress generated between the outer layer round wire and a middle layer strand after the stress is pre-applied, and the bending rigidity of the steel strand can be increased.

The invention provides a calculation method and system for a herringbone micro anti-slide pile structure, the herringbone micro anti-slide pile structure is dispersed, and the interaction between a micro pile and a stratum is simplified into transverse and axial non-linear springs acting on nodes; determining nonlinear spring parameters; calculating the soil displacement and direction of each micro pile structure according to the landslide mass motion characteristics; establishing a structural overall stiffness matrix; establishing an overall increment balance equation set including the spring stiffness; the landslide mass displacement is divided into a plurality of displacement increments to be solved respectively, the spring stiffness and the pile bending stiffness are updated after each increment step, and the internal force and deformation of the herringbone micro pile structure under the corresponding landslide mass displacement effect are obtained through accumulation. According to the calculation method and system for the herringbone miniature anti-slide pile structure, material and geometric nonlinearity of the pile and interaction nonlinearity of the pile and the stratum can be considered at the same time, and calculation precision and efficiency are high.

The invention discloses an isogeometry-based composite material thin shell dynamics prediction method, and belongs to the field of composite material thin shell dynamics behavior prediction. The implementation method comprises the steps that geometric modeling is conducted on the composite thin shell based on an isogeometric analysis method, unification of geometric modeling and numerical analysis is achieved through a non-uniform B spline (NURBS), and a composite thin shell geometric model is obtained; calculating a tensile stiffness matrix, a tensile-bending coupling stiffness matrix and a bending stiffness matrix of the composite material thin shell through the composite material parameters; establishing a kinetic model of the composite material thin shell unit through continuous medium mechanics, assembling the kinetic model to obtain an overall kinetic model of the composite material thin shell, and establishing a kinetic equation of the composite material thin shell based on the overall kinetic model of the composite material thin shell and the stiffness matrix; a kinetic equation is solved based on a generalized alpha implicit time integration algorithm, the kinetic behavior of the composite thin shell under the action of an external force F is predicted, and the stability and precision of thin shell kinetic behavior prediction are improved.

The rear floor structure comprises a longitudinal beam section, a cross beam section and a plurality of reinforcing ribs, the longitudinal beam section, the cross beam section and the reinforcing ribs are integrally formed, and the longitudinal beam section comprises a first longitudinal beam and a second longitudinal beam which extend in the length direction of the vehicle and are distributed in the width direction of the vehicle at intervals; the cross beam section comprises a first cross beam and a second cross beam which are distributed between the first longitudinal beam and the second longitudinal beam at intervals, and the first longitudinal beam, the first cross beam, the second longitudinal beam and the second cross beam are sequentially connected end to end to form a hollow annular structure; the reinforcing ribs extend in the length direction of the longitudinal beam section and the transverse beam section and are longitudinally and transversely connected in the connecting area of the longitudinal beam section and the transverse beam section to form a first closed-loop structure and a second closed-loop structure, and the first closed-loop structure and the second closed-loop structure are distributed in an annular array mode relative to the hollow area of the annular structure. And the first closed-loop structures are distributed on the inner side of the second closed-loop structure at intervals. The torsion and bending rigidity of the rear structure of the vehicle can be effectively improved, and the requirement for light weight of the vehicle is met.

The invention relates to a construction method for reinforcing a landslide through prefabricated high-bending-resistance anti-slide piles, and belongs to the technical field of slope reinforcing engineering. In order to solve the problems that a traditional anti-slide pile is insufficient in flexural rigidity and difficult to reinforce after construction, the I-shaped anti-slide pile structure is adopted and is formed by connecting an upper wing plate pile, a lower wing plate pile and a web pile through a mortise and tenon joint structure, and the flexural rigidity is 3.69 times and 4.15 times that of a square pile and a round pile respectively. During construction, the upper wing plate piles are firstly driven to penetrate through the sliding surface, then the unit piles are formed through mortise and tenon connection of the web piles and the lower wing plate piles, and the continuous underground diaphragm wall is formed by repeatedly driving and utilizing the side mortise and tenon structures of the adjacent pile bodies. Water-absorbent resin (the water absorption rate is larger than or equal to 80 g / g) is smeared at the mortise and tenon joint, the functions of sealing and reducing the pore water pressure are achieved, and the slope stability is improved. The anti-slide pile is suitable for landslide reinforcement of soft soil and complex stratums, modular expansion construction can be achieved, adaptability is high, and the mechanical property and engineering applicability of the anti-slide pile are effectively improved.

The utility model belongs to the technical field of steel structures, and particularly relates to I-shaped steel for a bridge, which comprises an I-shaped steel body, a plurality of holes are uniformly distributed on a web of the I-shaped steel body, and foamed aluminum is filled in each hole. A plurality of reinforcing ribs are further arranged on a web of the I-shaped steel body, the reinforcing ribs and the holes are distributed in a staggered mode, every two adjacent I-shaped steel bodies are connected through a connecting mechanism, the holes are of a hexagonal structure and evenly divided into a plurality of groups, and the multiple groups of holes are evenly distributed in the length direction of the I-shaped steel body. The plurality of groups of holes and the plurality of reinforcing ribs are alternately distributed; according to the utility model, the plurality of holes are formed in the I-shaped steel body, and the foamed aluminum is filled in each hole to form a'metal framework + core material 'composite structure, so that compared with a solid web, the weight is reduced by 25%-30%, and the flexural rigidity is improved at the same time; the adjacent I-shaped steel is connected through the connecting mechanism, and detachable connection is achieved.

The present invention relates to an evaluation method for steel structure splicing nodes, comprising the following steps: (a) obtaining defect information of the steel structure splicing nodes after the steel structure splicing nodes are disassembled; (b) obtaining a correction factor of the rotational stiffness of the steel structure splicing nodes based on the defect information; (c) obtaining the theoretical shear stiffness and theoretical bending stiffness of the steel structure splicing nodes; (d) obtaining the actual rotational stiffness of the steel structure splicing nodes based on the correction factor, the theoretical shear stiffness and the theoretical bending stiffness; (e) obtaining the actual geometric shape of the steel structure splicing nodes after all steel structure splicing nodes are installed; (f) obtaining the actual bearing capacity of the steel structure splicing nodes based on the actual geometric shape and the actual rotational stiffness; (g) obtaining the design bearing capacity of the steel structure splicing nodes; and (h) evaluating the reusability of the steel structure splicing nodes based on the actual bearing capacity and the design bearing capacity of the steel structure splicing nodes.

The utility model provides a kind of electronic thoracoscope with universal bending insertion part, including operating part and insertion part extending along length direction, the insertion part includes front end portion, active bending section, passive bending section and rigid pipe section from distal end to proximal end in order, the front end portion is equipped with optical imaging module and illumination light source;Active bending section is set in the proximal end of the front end portion, by multiple jointed snake bone unit, actively bends in response to operating part control;Passive bending section is connected to the proximal end of active bending section, the passive bending section has universal bending characteristic and the bending stiffness of the passive bending section is less than active bending section;Rigid pipe section is connected to the proximal end of passive bending section.The utility model expands the observation range of thoracoscope by passive bending section, reduces observation blind area, avoids the direct confrontation of active bending section and the rigid structure of guide sleeve inlet, prolongs the service life of equipment, reduces the loss risk of equipment.

The present application relates to a kind of pre-tensioned steel wire rope lateral impact response calculation method considering geometric and friction nonlinear coupling.First, the linear tensile constitutive model of pre-tensioned steel wire rope is constructed, Von Kármán large deflection theory is introduced, and the geometric hardening relationship of the nonlinear growth of axial tension with lateral deflection is established;Subsequently, a bilinear bending stiffness model is constructed to calculate the critical anti-sliding torque that evolves dynamically with tension;Based on the principle of energy conservation and Rayleigh-Ritz method, the system total potential energy functional of axial tensile potential energy and nonlinear bending potential energy is constructed, and the maximum impact deflection and tension response of the steel wire rope are obtained by solving the energy residual equation, the maximum response is substituted back into the constitutive equation, and the maximum nominal stress of the midspan cross section, the maximum axial tension and the extension length of the internal slip zone are calculated.The present application has very high calculation efficiency compared with full-size finite element simulation, and is suitable for the rapid design and safety evaluation of steel wire rope protection system.

A tail assembly for a rotorcraft having a fuselage. The tail assembly includes a stabilizer having an aft spar and a forward spar. An aft joint couples the aft spar to the fuselage and defines a pitch axis such that the aft joint allows the stabilizer to pivot about the pitch axis. A forward joint couples the forward spar to the fuselage. The forward joint has an axial stiffness configured to tailor a chordwise pivot mode of the stabilizer and a bending stiffness configured to tailor a beamwise bending mode of the stabilizer. The chordwise pivot mode of the stabilizer is decoupled from the beamwise bending mode of the stabilizer.

The present invention discloses a load application method for a BIW bending stiffness simulation load application device, comprising a simulation rod for applying a load and a simulation plate fixedly connected to the bottom of the simulation rod through a one-dimensional connecting beam unit and used to transfer the load to the load application location of the BIW bending stiffness simulation test; at least one simulation plate is symmetrically connected to the left and right sides of the simulation rod. By utilizing the simulation loading device designed by the present invention, the BIW bending stiffness can be obtained simply, accurately and quickly, and the BIW bending stiffness performance can be accurately evaluated in the early stage of project development, thereby improving the BIW development efficiency, avoiding repeated modifications in the later physical stage due to inaccurate early performance evaluation, and saving development costs and time.

A payload carrier (10) includes a support subassembly (20) and an integrated tray device (12). The support subassembly (20) is secured to, extends from, and / or is suspended from the integrated tray device (12). The integrated tray device (12) forms part of the structural chassis of the payload carrier (10) and thus is designed to support the payload carrier (10) and to increase the flexural rigidity, torsional rigidity and impact strength of the payload carrier (10). Generally, an integrated tray device (12) includes a tray (14) and a support structure (18).

This invention discloses a method, system, equipment, and storage medium for calculating the deformation of a pipe-jacking structure considering the soil resistance between the pipe and culvert. The method includes the following steps: S1. Simplifying the pipe-jacking structure as an elastic thin plate, and further simplifying the problem to the deformation of an elastic thin plate with fixed opposite sides and simply supported opposite sides under a uniformly distributed load on a Winkler elastic foundation, obtaining the differential equation of the bending surface of the thin plate on the Winkler elastic foundation and the expression for the boundary conditions of the thin plate; S2. Determining the elastic modulus when the pipe-jacking structure is simplified to an elastic thin plate, and calculating the bending stiffness D of the pipe-jacking structure; S3. Solving the differential equation of the bending surface of the thin plate on the Winkler elastic foundation using a hybrid solution method combining trigonometric series and the force method, obtaining the deflection formula of the elastic thin plate placed on the elastic foundation under a uniformly distributed load. This invention can accurately predict the deformation of pipe-jacking structures.

The invention relates to the field of buildings, in particular to a reinforced concrete member manufacturing method and a post-cracking bending rigidity calculation method.The reinforced concrete member manufacturing method comprises the following steps that S1, a steel reinforcement framework is fixed to the set position of a concrete pouring mold, and a reinforced area of a concrete body is determined; s2, determining structural parameters of the reinforcing grooves and the reinforcing ribs; s3, the foam board is cut to enable the shape of the foam board to correspond to the shape of the reinforcing groove, and the foam board is fixed to the position, corresponding to the reinforcing area, in the concrete pouring mold; s4, concrete is poured into the concrete pouring mold, a concrete main body is formed after the concrete is cured and solidified, and after the concrete main body is demolded, the internal foam plate is emptied to form a reinforcing groove; and S5, reinforcing ribs are inserted into the reinforcing grooves, the reinforcing grooves are filled with UHPC, and machining of the concrete member is completed after maintenance. The bearing capacity and durability of the reinforcing system are improved, meanwhile, the glass fiber reinforced resin composite material in the retired wind power blade is applied to the reinforcing system, and the reinforcing cost is reduced.

The present disclosure provides a Timoshenko beam model equivalent method and system of a corrugated steel plate support structure, and relates to the technical field of stress analysis of a corrugated steel plate support structure, comprising: solving the stiffness coefficients of the corrugated steel plate in a local coordinate system, including tensile stiffness, bending stiffness and shear stiffness; solving the equivalent stiffness coefficients of the orthotropic corrugated steel plate in a global coordinate system, including equivalent tensile stiffness, equivalent bending stiffness and equivalent shear stiffness; solving the equivalent section bending stiffness of the corrugated steel support structure; solving the equivalent section shear stiffness of the corrugated steel support structure; and equivalent the corrugated steel support structure to a Timoshenko beam model. The present disclosure can realize the rapid equivalent of the corrugated steel plate support structure to a Timoshenko beam model.

The present invention discloses an annular cylindrical workpiece, a polishing platen, a polishing device, and a method for controlling a polishing surface profile. The method comprises: an expansion chamber disposed between a support plate and a polishing plate; one end of the expansion chamber is connected to a pressure control source; the pressure control source varies an output load based on the axial length of an outer wall of the expansion chamber, the bending stiffness of the outer wall, the wall thickness of the outer wall, the elastic modulus of the outer wall, and the Poisson's ratio, thereby varying the deflection of the outer wall; the outer wall of the expansion chamber is configured to transmit a torque to the polishing plate when the deflection increases, thereby deforming the polishing surface profile of the polishing plate. The present invention achieves the technical effect of reducing the difficulty of controlling the polishing surface profile while improving the accuracy of controlling the polishing surface profile.

The application provides a short cable force and stiffness meta-heuristic intelligent identification method considering bending stiffness, and belongs to the field of bridge structure health monitoring and parameter identification. First, based on the measured vibration frequency of the cable structure, the initial value range of the cable force and the bending stiffness is determined by using a simplified analytical model; then a parameter space is constructed within the range, and candidate parameter combinations are generated by random sampling or distribution sampling; the corresponding theoretical frequency is calculated based on the W-W algorithm; the data items of the loss function between the measured frequency and the theoretical frequency are constructed, and the physical loss items of the loss function are constructed by using the vibration differential equation; the parameter inversion is carried out by combining global search and local optimization, and the adaptive interval contraction strategy is introduced to improve the calculation efficiency and the identification accuracy; finally, the optimal cable force and bending stiffness parameters are obtained. The method does not need to rely on the initial accurate parameters, has high robustness and engineering applicability, and can significantly improve the identification accuracy of the cable force and the stiffness.