19results about How to "Solve the stiffness problem" patented technology

The invention discloses a thermal error prediction method for a spindle system of a high-speed precision machine tool under an inclined working condition, and develops a comprehensive thermal error compensation method for the spindle system of the high-speed precision machine tool running under the inclined working condition by utilizing error mechanism analysis. The thermal error is modeled as an exponential function which depends on the steady-state thermal error, the time constant of the thermal error balance process and the working time, derivation of the exponential function is supported by error mechanism analysis, and the exponential function is used for accurately identifying the time constant of the steady-state thermal error and the time constant of the thermal error balance process through thermal-structural interaction. Influences of inclined working conditions are incorporated into a quasi-static mechanical model of the bearing, and the problems of bearing heating and changes of axial and radial rigidity are solved. The invention further discloses a thermal error compensation system.

The invention belongs to the technical field of continuum robots, and discloses a variable-rigidity and driving combined continuum robot and an optimization design method thereof.The variable-rigidity and driving combined continuum robot comprises a second section, a middle transition section, a first section, a first section rope and a second section rope, and the second section and the first section are connected through the middle transition section; each of the second section and the first section comprises a plurality of wire guiding discs and a plurality of check rings, every two adjacent wire guiding discs are connected through the corresponding check ring to form a cylindrical pair joint, and the four first section ropes and the four second section ropes are evenly distributed relative to the center line of the continuum robot; the four first section ropes are used for driving two mutually perpendicular degrees of freedom of the first section, the four second section ropes are used for driving two mutually perpendicular degrees of freedom of the second section, and the second section and the first section move independently. The continuum robot does not need to be assembled, is flexible in movement, controllable in rigidity and small in friction force, and improves the interaction and sensing ability with the environment during operation.

The invention provides an amorphous alloy material, an elastomer structure and a six-dimensional force sensor. Specifically, the amorphous alloy material comprises Zr, Ta, V, Nb and M, and M is Cr, Al, Ti or Hf. The invention further provides application of the amorphous alloy material in a six-dimensional force sensor. The amorphous alloy material has high yield strength, low Young modulus and high elastic limit. When the amorphous alloy material is used for preparing the six-dimensional force sensor, the six-dimensional force sensor has the advantages of high sensitivity, high precision, wide range, low crosstalk and the like.

The invention provides an amorphous alloy material and a preparation method and application thereof. Specifically, the invention relates to an amorphous alloy material, the amorphous alloy material comprises Ti, Zr, Be, Ni and Cu, and the atomic ratio of Ti to Zr to Be to Ni to Cu is (36-41): (22-25): (22-26): (7-8): (2-12). The invention further provides a method for preparing the amorphous alloy material. The invention further provides application of the amorphous alloy material in a tension and pressure sensor. Compared with a traditional material, the amorphous alloy not only has a unique isotropic structure, but also has remarkably improved yield strength and reduced Young modulus, so that synchronous optimization of the measuring range and the sensitivity is achieved.

The utility model provides a kind of collision energy-absorbing box and vehicle, it is related to vehicle parts technical field, collision energy-absorbing box includes shell and energy-absorbing component, shell is used to connect between car body longitudinal beam and crash beam;Energy-absorbing component includes flexible container and filled shear thickening fluid in it, flexible container is set in shell;Flexible container has a stress part, stress part extends to the outside of shell and is used to bear collision force;Shear thickening fluid can change its viscosity in response to different collision speed transmitted by stress part, and change by the deformation resistance of flexible container, so that energy-absorbing box presents different rigidity.The utility model integrates energy-absorbing component in shell, and makes energy-absorbing component consist of flexible container and filled shear thickening fluid in it, realizes the self-adapting adjustment of energy-absorbing box rigidity by the self-adapting change of shear thickening fluid viscosity, solves the contradiction that traditional energy-absorbing box cannot consider low speed and high speed crash performance.

A rigidity-constrained sine compression-torsion metamaterial band gap design method comprises the following steps: S100, aiming at a sine compression-torsion metamaterial unit, establishing an analytical model among geometric parameters, equivalent rigidity and band gap boundary frequency of the sine compression-torsion metamaterial unit, so as to obtain a constraint equation describing the geometric parameters and the equivalent rigidity and the band gap boundary frequency; s200, fusing the constraint equation generated in the step S100, and constructing and training a physical information neural network for realizing high-precision and high-efficiency forward mapping from unit geometric parameters to rigidity and band gap frequency; s300, constructing and training a neural network for realizing reverse mapping from target stiffness and band gap frequency to unit geometric parameters, and providing an initial scheme for rapid customized design; and S400, setting target rigidity and band gap conditions, and adopting an intelligent optimization algorithm to call the trained physical information neural network model as a performance evaluator to perform iterative optimization. The method aims at solving the problems that in the prior art, rigidity constraint and band gap performance cannot be effectively balanced, and design and calculation efficiency is low.

The invention provides a Zr-based amorphous alloy material, a vibrating wire and a vibrating wire strain gauge. Specifically, the invention provides a Zr-based amorphous alloy material, the Zr-based amorphous alloy material comprises Zr, Co, Fe and Ni, and the atomic ratio of Zr to Co to Fe to Ni is (32-57): (12-26): (6-18): (6-13). The invention further provides application of the Zr-based amorphous alloy material in a vibrating wire strain gauge. The vibrating wire strain gauge provided by the invention has the characteristics of high sensitivity and high precision, and also has high range and high stability. Compared with other vibrating wire strain gauge optimization technologies, the vibrating wire strain gauge has higher dynamic and static precision, the structure of the strain gauge is simpler, and the production cost is lower.

The present disclosure provides a kind of blade section bending stiffness optimization method and device, electronic equipment and storage medium, it is related to blade structure design technical field, by establishing the design architecture of basic reinforcement layer, main reinforcement layer and auxiliary reinforcement layer cooperation, first in first preset position setting main reinforcement layer and iteration adjustment its geometric parameter, after main reinforcement layer reaches process limit, again in second preset position, add auxiliary reinforcement layer, and fixed main reinforcement layer parameter iteration optimization auxiliary reinforcement layer geometric parameter, formed the systematic design system of multiple reinforcement layer, multiple preset position, geometric parameter iteration adjustment, therefore, it can solve the problem that the stiffness direction imbalance caused by lacking multidimensional parameter collaborative adjustment system in prior art, only using single reinforcement strategy and not setting reinforcement layer position reasonably, difficult to meet preset tolerance, material redundancy and high risk of structural failure.

The invention discloses an amorphous alloy elastomer and a torque sensor for robot joints, the chemical formula of amorphous alloy is ZraTibFecNbdMe, M is one element of Cr, Al, B or S, and a, b, c, d and e meet the following conditions: 40 < = a < = 55, 12 < = b < = 27, 6 < = c < = 20, 3 < = d < = 20, and 0 < = e < = 6. The torque sensor comprises an amorphous alloy elastic body and a strain gauge, the amorphous alloy elastic body is a circular sheet-shaped elastic body, the sheet-shaped elastic body comprises a fixed mounting surface, strain grooves with side walls and bottom walls are formed in the upper side and the lower side of the fixed mounting surface, the strain grooves are in through connection through through grooves, and the through grooves comprise a first groove and a second groove; the width of the through groove is 0.8-1.0 mm. The strain gauge is arranged on the bottom wall of the strain groove. The amorphous alloy elastomer can have high yield strength, low Young modulus and high elastic limit at the same time, and the problem that rigidity and sensitivity of a sensor are difficult to harmonize is solved.

The present invention relates to a bridge-lining combined structure with a tunnel spanning function and a construction method thereof, and belongs to the field of bridge-tunnel structures. It includes a bridge deck, and supporting longitudinal beams are fixed on both sides of the width direction below the bridge deck, and a plurality of transversely arranged supporting crossbeams are fixed on the lower end surface of the bridge deck. The supporting crossbeams are evenly spaced, and the two ends of the supporting crossbeams are respectively passed through the supporting longitudinal beams and fixedly connected with the tunnel primary support steel frame in the tunnel as a whole. The inner side of the tunnel primary support steel frame is the tunnel secondary lining, and the transverse steel bars of the tunnel secondary lining are anchored in the supporting longitudinal beams. The end supporting crossbeams are located at the two ends of the space to be spanned in the tunnel, and the end supporting crossbeams are fixedly connected with the supporting longitudinal beams as a whole. The supporting longitudinal beams are extended to a certain length to the non-bridge span sections in the tunnels at both ends and placed on the surrounding rock, and the tunnel pile foundation in the tunnel is arranged at the intersection of the end supporting crossbeams and the supporting longitudinal beams. The structure has greater rigidity and stability than the traditional tunnel bridge structure.

The utility model provides a lateral flexible wall consolidometer, which comprises a rigid sleeve, a flexible film, an inner sleeve and a displacement monitoring device, and is characterized in that the inner sleeve comprises an upper annular cylinder, a lower annular cylinder and a screw rod; the rigid sleeve comprises a connector and a through hole. The flexible film is positioned in the middle of the rigid sleeve and sleeves the outer wall surfaces of the upper and lower annular cylinders; and the screw rod is fixed in the middle of the upper-lower annular cylinder. A displacement monitoring device is installed in the middle of the rigid sleeve, and a telescopic head of the displacement monitoring device makes contact with the flexible film and is used for measuring horizontal deformation of the flexible film. The device disclosed by the utility model can measure the lateral pressure of a soil sample while consolidating, can solve the problem of errors caused by rigidity difference in a traditional measurement method, improves the accuracy of a test result, and has an irreplaceable effect on analyzing the mechanical property of a soil material and predicting consolidation parameters. Through actual measurement and comparison, the device can improve the precision of the lateral force measurement result of the soil sample in the consolidation process by about 45%, and has very important practical significance and application value.

This invention discloses a rear frame structure for a vehicle cargo box and its assembly method, belonging to the field of automotive manufacturing technology. The structure connects the cargo box crossbeam assembly and the rear outer panel assembly to form a composite beam, with three-dimensional limiting socket interfaces at both ends. The left and right rear pillar assemblies of the cargo box are equipped with matching sockets, which can be inserted vertically into the interfaces to achieve automatic guidance and horizontal limiting, greatly simplifying assembly. After socketing, a combination of internal welding and external bolts ensures strength and utilizes bolt preload to actively level surface differences. The cargo box crossbeam assembly adopts a U-shaped cross-section design, with built-in support plates and pre-set suspension mounting points, improving overall rigidity and assembly accuracy. This invention effectively solves the problems of poor welding quality, low assembly accuracy, and poor appearance matching in traditional cargo box rear structures.

The utility model provides a core column reinforced wall, and belongs to the technical field of wall reinforcement. The core column reinforced wall body comprises a wall body to be reinforced, a rib material and filler. The rib material is embedded in the groove in the wall body to be reinforced, meanwhile, the two ends of the rib material are embedded in the upper ring beam and the lower ring beam respectively, meanwhile, the groove is filled with the filler, the rib material and the wall body to be reinforced are connected through the filler, and the rib material plays a riveting role, so that the wall body to be reinforced is connected with the upper ring beam and the lower ring beam into a whole through the rib material. The bearing capacity and rigidity of the to-be-reinforced wall body are improved, and the technical problem that in the prior art, the bearing capacity or rigidity of the to-be-reinforced wall body and a brick wall are insufficient due to aging of the wall body is solved.

The invention provides an amorphous alloy rotating shaft, which comprises a cylindrical elastic body, an amorphous alloy rotating shaft, an amorphous alloy rotating shaft, an amorphous alloy rotating shaft, an amorphous alloy rotating shaft and an amorphous alloy rotating shaft, and is characterized in that the elastic body is twisted and deformed under the acting force of transmission equipment; a strain area is arranged in the middle of the elastic body, and the strain area twists and deforms under the acting force of transmission equipment; the connecting end is used for connecting the rotating shaft with transmission equipment; the shaft sleeve is used for fixing the rotating shaft; wherein the elastic body, the connecting end and the shaft sleeve are all made of amorphous alloy materials, the amorphous alloy materials comprise Zr, Co, Cu, Nb, Al or Ti or Fe, and when Al or Ti is adopted, the atomic component percentage of the amorphous alloy materials is 0%-8%; when Fe is adopted, the atomic component percentage is 0-5%. Based on the scheme of the invention, the response performance of the prepared rotating shaft is improved on the basis of maintaining high strength, the sensitivity can be obviously improved, the total volume is greatly reduced, and the dual purposes of structure compactness and performance enhancement are realized.

The application relates to the technical field of building engineering construction, and provides a shearing jack synchronous telescopic deformation joint profiling aluminum mold structure and a construction method, which comprises two pieces of oppositely arranged aluminum alloy wallboards; the two pieces of aluminum alloy wallboards are arranged in a back-to-back vertical parallel mode, and the gap between the two pieces of aluminum alloy wallboards constitutes a deformation joint cavity; a shearing jack array arranged in multiple rows and multiple columns is arranged between the two pieces of aluminum alloy wallboards, the two ends of the shearing jack are fixedly connected with the opposite inner sides of the aluminum alloy wallboards on the two sides, and the two pieces of aluminum alloy wallboards are connected into an integrated structure capable of being integrally hoisted. When the application is used, the multiple-row and multiple-column shearing jack array arranged between the two pieces of aluminum alloy wallboards solves the industry common problem that personnel cannot enter the construction due to the narrow space in the deformation joint cavity, greatly improves the construction efficiency, and reduces the operation difficulty and safety risk.

The application provides a tuned mass damper, a structural assembly of a wind turbine generator and a wind turbine generator. The tuned mass damper comprises a base, an elastic body and a main mass module arranged on the base, and a sub-mass module connected with the main mass module. The main mass module comprises a first mass body, the elastic body comprises a first elastic body arranged between the first mass body and the base, and a first connecting member connects the first mass body, the first elastic body and the base (100). The sub-mass module is detachably connected with the main mass module on the side opposite to the base, so as to adjust the mass of the tuned mass damper, thereby being capable of adapting to different platform requirements.

The utility model relates to the technical field of earthquake resistance of building structures, in particular to a modular composite damping wallboard and a wall body with a built-in steel-concrete combined framework, which comprise an upper composite wallboard, a lower composite wallboard and an energy consumption element, the lower composite wallboard is arranged right below the upper composite wallboard, and the energy consumption element is arranged right below the lower composite wallboard. The upper end of the energy consumption element is fixedly connected with the lower end of the upper composite wallboard, and the lower end of the energy consumption element is fixedly connected with the upper end of the lower composite wallboard; the modularized composite damping wallboard is divided into the upper composite wallboard body and the lower composite wallboard body, the upper composite wallboard body and the lower composite wallboard body are fixedly connected through the energy dissipation element, the composite wallboard is divided into the upper unit and the lower unit, and deformable energy dissipation in the plane is achieved.

The invention discloses a motor mounting rack of an electric loader, which solves the problem of reasonably mounting motors of different models on the loader, so that the motors can flexibly adapt to different mounting requirements, the problem that a bracket body is easy to deform is solved, and the structural stability and the bearing capacity are ensured. According to the technical scheme, the bracket comprises a bracket body, a fixed mounting seat and a movable mounting seat, two groups of fixed mounting seats are arranged at the upper part of the bracket body and are respectively arranged at two ends of the bracket body; lug plates are arranged at the ends of the support body and used for connecting the support body and a main beam frame of the loading machine. The movable mounting seat is slidably mounted on the support body, and a fastener is arranged below the movable mounting seat and used for controlling movement and fixation of the movable mounting seat.

The application discloses an underground structure parameterized intelligent design and automatic reinforcement optimization method and system, relates to the field of computer-aided design, and comprises the following steps: obtaining segmented data, segment boundary data, load working condition data and initial internal force data, and generating a reinforcement scheme set; obtaining segment demand parameters of each segment based on internal force envelopes and geometric normalization; performing segment internal checking and cost evaluation on the reinforcement scheme, determining a reference reinforcement scheme and a segment internal surplus value; combining adjacent segment relationships, the reference reinforcement scheme, the segment demand parameters and segment boundary allowed deformation threshold values, obtaining segment boundary risk weights; constructing a joint objective function and combining solving on the basis, obtaining a current reinforcement scheme combination; and then obtaining segment boundary feedback parameters through reanalysis, iteratively updating the segment boundary risk weights, and outputting segmented reinforcement schemes meeting convergence conditions until the segmented reinforcement schemes are output. The application can improve the overall coordination, engineering applicability and economy of underground structure reinforcement design.