211 results about "Curved beam" patented technology

The invention provides an ultra-short beam homogenization transmission line system and method based on a four-eight-pole composite magnet. The system comprises the four-eight-pole composite magnet, a system, a linear beam homogenization structure, a bent beam homogenization structure and secondary iron used for a beam homogenization transmission line. The system further comprises an ultra-short linear beam homogenization transport line, an ultra-short bent beam homogenization transport line, an ultra-short linear bent composite beam homogenization transport line and an ultra-short symmetrical bent beam homogenization transport line based on the homogenization structure and / or the dipolar iron. The method comprises an exciting current debugging method based on the four-pole and eight-pole composite iron and a linear type and bending type beam debugging method. According to the invention, the problem that the maximum enveloping part on the transmission line is occupied and the effect of octopole iron cannot be fully exerted is solved; the problems that the beam envelope of the position where the octopole iron is located is small, and the requirement for the field intensity of the octopole magnet is high are solved. The problem that the civil engineering shielded around the transmission line is more expensive because the transmission line is too long is solved.

A method for calculating an opening response of a shield tunnel with supports. A rectangular opening is formed in the shield tunnel, and the supports is arranged in the shield tunnel. Calculating a segment response of the tunnel after opening comprises: dividing segments into sections along the longitudinal seam to obtain transfer equations within and between sections, with internal forces at the opening being 0; simulating, by Timoshenko curved beam and straight beam theory, segments and supports; simulating, by radial, tangential and rotating three-directional springs, longitudinal joints, and simulating, by two-directional shear springs, circumferential joints between adjacent rings; simulating, by a Winkler soil spring, interaction between tunnel and stratum; deriving node equations of intersection of the supports and intersection of the support and segment according to principle of equal displacement and balanced internal force; and combining and solving the above equations to obtain the opening response of the shield tunnel.

The invention discloses a method for calculating stress and deformation of a roller carrier supporting thin-walled cylinder under the action of dead weight, which comprises the following specific steps of: S1, calculating the bending moment and deflection of a cylinder body in the longitudinal direction by adopting an overhanging beam model in the longitudinal direction, and determining the optimal position of the roller carrier in the longitudinal direction according to the maximum bending moment minimization and the maximum deflection minimization of a beam; s2, transversely utilizing symmetry to establish a semicircular curved beam model, and calculating bending moment and displacement in a transverse plane of the cylinder by adopting a Temosinke beam theory; s3, calculating the maximum stress in the cylindrical surface according to the in-surface bending moment, and determining the optimal half wrap angle required by the strength; and S4, calculating the ovality and root-mean-square roundness of the curved beam according to the displacement, and determining the optimal half wrap angle required by deformation. According to the method, the maximum stress and the deformation shape of the thin-walled cylinder are accurately predicted, and the optimal wrap angles of the roller carrier under the strength requirement and the deformation requirement can be determined to be 67.4 degrees and 90 degrees respectively, so that the optimal wrap angle is suggested to be between 67.4 degrees and 90 degrees in engineering.

The invention discloses a method for testing interlayer tensile strength of a ceramic matrix composite material. Comprising the following steps: acquiring the geometric dimension of a sample, performing surface treatment on a test surface of the sample, marking a test section of the sample, acquiring the geometric dimension of a four-point bending clamp, determining a placement mode of the sample and a camera, and capturing a displacement field of the test surface of the sample by using the camera while performing a curved beam four-point bending test. Obtaining the load value and stroke of the first load drop, extracting the in-situ strain of the sample by using a camera, deducing a formula for calculating the interlayer radial and tangential modulus ratio of the sample, carrying out calculation, and calculating the interlayer tensile strength of the sample by using the existing formula. According to the method disclosed by the invention, the modulus ratio of the interlayer radial direction to the interlayer tangential direction is obtained by using in-situ strain, the problem that the interlayer radial modulus is difficult to accurately determine directly through the test is solved, and the accuracy of the interlayer tensile strength of the ceramic matrix composite material measured through the curved beam four-point bending test is improved.

The utility model relates to a novel electro-tricycle bearing type frame structure, which belongs to the technical field of tricycle frames and comprises a right bent pipe, an upper-layer frame camber beam and a lower-layer frame camber beam which are oppositely arranged. An upper-layer frame front beam is connected between the two upper-layer frame camber beams and extends to the outer sides of the upper-layer frame camber beams, upper-layer frame vertical supports are connected between the upper-layer frame camber beams and the lower-layer frame camber beams, the bent positions of the upper-layer frame camber beams are connected with the upper surfaces of the lower-layer frame camber beams, a middle beam is connected between the front cross support and the connecting beam, and a lower cross support is connected between the middle beam and the lower-layer frame camber beams. And a front vertical beam is mounted on the middle beam. After the structure is adopted, the tricycle frame has the advantages that the upper-layer frame camber beam and the lower-layer frame camber beam are connected through the connecting beam, the front cross brace, the reinforcing cross brace and the upper-layer frame front beam according to a tricycle frame produced according to a novel tricycle type, the tricycle frame is formed in a welding mode, the strength is greatly improved, the surface is smooth after forming, and the weight is well borne.

The invention relates to the technical field of overhead line system cantilever installation, in particular to railway overhead line system cantilever installation equipment which comprises a hanging basket fixedly installed with an external climbing crane mechanical arm, an arc-shaped beam is slidably connected to the middle of the hanging basket in a clamped mode, and a first carrying plate and a second carrying plate are fixed to the two sides of the arc-shaped beam respectively. First motors used for driving the arc-shaped beam to rotate are fixed to the two sides of the hanging basket correspondingly, and two second motors are fixed to the top face of the first carrying plate. According to the invention, the motor II drives the poke rod to rotate, so that the inclined cantilever can be automatically inserted into the mounting hole of the lower insulator, and the motor I drives the arc-shaped beam to rotate upwards by taking the hinged position of the lower insulator and the supporting column as the circle center, so that the arc-shaped beam moves the flat cantilever to the position of the mounting hole of the upper insulator; and finally, the whole cantilever is pushed towards the supporting column through the poke rod again, the cantilever is automatically installed between the two insulators, and the cantilever installation efficiency can be improved.

The invention belongs to the technical field of vibration isolation, and particularly relates to a quasi-zero stiffness metamaterial sandwich structure, a vibration isolation device and a manufacturing method. The quasi-zero stiffness metamaterial sandwich structure is formed by periodically arranging unit cells in the horizontal direction, and each unit cell comprises an upper panel, a lower panel, a QZS resonator core body and a vertical supporting column; the QZS resonator core comprises a central mass block, QZS resonator units are arranged on the upper portion and the lower portion of the central mass block in a mirroring mode, each QZS resonator unit is composed of two quasi-zero-stiffness unit cells which are arranged in a crossed mode, and each quasi-zero-stiffness unit cell is composed of a negative-stiffness component comprising a horizontal curved beam and a positive-stiffness component comprising an oblique straight beam. According to the sandwich structure, the quasi-zero-stiffness resonator of a novel structure serves as a core body, wider application in the ultra-low frequency vibration reduction field can be achieved, the band gap is adjustable, and the problems that a traditional metal base material structure is high in band gap frequency and limited in application field can be solved.

The invention provides an arc-shaped beam bending device for steel structure machining, and belongs to the technical field of machining. According to the structure, a pressing roller is connected to a sliding block, a plurality of electric cylinders are arranged on a base table, the free ends of the electric cylinders are connected with pushing rollers, a plurality of first motors are arranged on the base table, guide wheels are connected to main shafts of the first motors, a base is fixedly connected to the side of the base table, and a sliding way and a rack are fixedly connected to the base; the rack is parallel to the sliding way, a sliding table is arranged on the sliding way, a gear is arranged on the sliding table, the gear and the rack are in matched transmission, a second motor is fixedly arranged on the sliding table, and the second motor is in transmission connection with the gear. Bending machining is carried out on the conveying channel of the steel beam through the push rollers and the guide wheels, and the steel beam bending machine is suitable for high-hardness and large-curvature machining scenes and has the high yield. Meanwhile, the cutting mechanism and the welding mechanism are additionally arranged, multi-procedure operation can be continuously completed, and the overall process efficiency is improved.

The invention relates to a variable-width volute spiral spring design method and a volute spiral spring, and belongs to the technical field of volute spiral springs.The variable-width volute spiral spring design method comprises the steps that S1, polar angles corresponding to plane spiral lines at different arc length positions are determined; s2, determining curvature radiuses corresponding to the planar spiral lines at different polar angle positions; s3, according to different curvature radius parts, the initial section width of the volute spiral spring is designed; and S4, the initial width of the volute spiral spring is adjusted according to the ratio of the radius to the half thickness of different parts, and uniform distribution of bending stress is achieved. The core of the method is that a corresponding width change rule is designed according to a change rule of bending stress along with curvature radius disclosed by a curved beam theory. By means of the method, the maximum bending stress of all the sections can be equal, and therefore the bearing capacity and stability of the volute spiral spring are improved.

A framing system for a construction set comprising a number of interchangeable elements which can be arranged to construct a variety of three-dimensional structures, as well as individual, stand-alone floors, which in turn are adapted to be stacked on one another. In some embodiments, the system comprises at least one central unit, a plurality of outer mid-columns, at least one tie beam corner unit, and / or at least one curved beam unit which cooperate to form a variety of stand-alone floors. The system comprises additional components which increase the stability of the construction set, including but not limited to internal corner brackets, cross pins, cross studs, square panels, and rectangular panels.

The invention belongs to the technical field of cement-based composite metamaterials, and particularly relates to a cement-based metal framework reinforced concrete metamaterial. According to the concrete metamaterial, negative stiffness layers and energy absorption layers are alternately arranged, each negative stiffness layer comprises two curve beams which are symmetrically arranged in the length direction, each curve beam is structurally composed of a repeating unit with the middle portion arched and the two ends pre-bent, each energy absorption layer comprises a framework and concrete, the framework is filled with the concrete, and the negative stiffness layers and the energy absorption layers are arranged in a staggered mode. The framework is formed by periodically arranging a plurality of inwards-concave hexagonal units in the length direction, and the horizontal side length of each inwards-concave hexagonal unit makes contact with the arch in the middle of the curve beam. The non-filled negative stiffness framework area and the negative Poisson's ratio framework area filled with concrete are constructed, function partition response of the structure in different impact stages is achieved, flexible regulation and control of performance can be achieved through topological structure adjustment, and therefore the crashworthiness and adaptability of the structure are improved.

The present invention discloses a support structure for underpasses with anti-pullout piles and a construction method thereof, which solves the problems of high difficulty and low safety factor in the prior art of removing anti-pullout piles during concealed excavation of existing tunnels and / or buildings. The support structure for underpasses with anti-pullout piles of the present invention comprises a connecting steel pipe that connects the existing building structure and the tunnel segment using a pipe curtain method, wherein a curved beam plate is provided on the side of the tunnel segment corresponding to the connecting steel pipe, and a reinforcing ring beam is provided on the side of the existing building structure corresponding to the connecting steel pipe, one end of the connecting steel pipe passes through the tunnel segment and is connected to the curved beam plate, and the other end passes through the existing building structure and is connected to the reinforcing ring beam and / or the existing building structure; after one side of the existing building structure is connected to the tunnel segment via the connecting steel pipe, the existing anti-pullout pile is removed, and then the other side of the existing building structure is connected to the tunnel segment via the connecting steel pipe. The present invention uses the pipe curtain method to construct connecting steel pipes, and uses the connecting steel pipes to connect the tunnel segments and the internal curved steel beams with the upper existing building structure to form a whole, so that the tunnel segments and the upper structure have a common anti-floating effect, and can safely and efficiently realize the safe construction of tunnels passing under existing buildings.

A framing system for a construction set comprising a number of interchangeable elements which can be arranged to construct a variety of three-dimensional structures, as well as individual, stand-alone floors, which in turn are adapted to be stacked on one another. In some embodiments, the system comprises at least one central unit, a plurality of outer mid-columns, at least one tie beam corner unit, and / or at least one curved beam unit which cooperate to form a variety of stand-alone floors. The system comprises additional components which increase the stability of the construction set, including but not limited to internal corner brackets, cross pins, cross studs, square panels, and rectangular panels.

The utility model discloses a tool for guaranteeing the assembling and welding precision of a curved beam of a monorail turnout beam, which relates to the technical field of manufacturing of transportation equipment and specifically structurally comprises a plurality of support components distributed at intervals; the transverse supports are installed between every two adjacent supporting assemblies respectively, and the transverse supports are combined to form an arc-shaped tool face; the supporting assembly comprises two ground platforms which are arranged in a spaced mode. The supporting plates are mounted on the ground platforms in a one-to-one correspondence manner; the two side baffles are installed at the two ends of the ground platform located on the outer side respectively, and the tops of the side baffles are located on the same horizontal plane. The utility model solves the technical problem that the existing monorail turnout curved beam lacks a tool for manufacturing precision.

Disclosed in the present invention are a magnetic-levitation spatial curved beam molding system and molding method. The magnetic-levitation spatial curved beam molding system comprises: a side mold assembly; and functional part mold plate assemblies, wherein two functional mold plate assemblies are correspondingly arranged on two side mold plates, respectively, each functional part mold plate assembly comprises functional part mold plates used for locating a magnetic levitation functional part and at least two vertical adjustment assemblies, and driving ends of vertical adjustment parts are movably fitted with the bottoms of the functional part mold plates, respectively so as to adjust the spatial locations and angles of the functional part mold plates. The functional mold plate assemblies are provided to locate and mount the magnetic levitation functional part, and the vertical adjustment assemblies and lateral adjustment parts are provided to implement any adjustment of the spatial angles and locations of the functional part mold plates, so as to satisfy the requirement of adjusting the spatial location of the magnetic levitation functional part on a spatial curved beam, such that the arrangement location of the magnetic levitation functional part can be better matched with the structure of the spatial curved beam, and the molding precision of the spatial curved beam is ensured.

The utility model relates to a straddle carrier frame which comprises a main frame, extending frames are symmetrically arranged at the left end and the right end of the main frame, each extending frame comprises a bearing beam and a supporting base connected with the main frame, and the supporting bases are arranged at the two ends of the bottom of the bearing beam. The supporting base comprises a transverse plate arranged at the lower end of the bearing beam and a bent beam used for supporting the transverse plate, and reinforcing ribs are welded to the connecting position of the bent beam and the main frame. The design of the extension frame allows the frame to adapt to a smaller plant space while keeping the strength, and is very useful for a warehouse or a factory environment with limited space. By using the camber beams and the supporting transverse plates, the length of the supporting transverse plates is shortened, so that the weight of the frame is reduced, and meanwhile, the required strength is maintained.

The utility model provides a bridge girder erection machine capable of satisfying double-layer cast-in-place beam height limit width limit beam erection construction, which comprises a machine arm, a first column, a second column, a hanging curved beam and a hanging beam crane, the first column is installed on a lower ear beam at the front end of the machine arm and fixedly connected with the machine arm through a gear rack, the second column is installed on an upper ear beam of the machine arm, and the hanging curved beam is fixedly connected with the machine arm through a gear rack. The second column is fixedly connected with a machine arm through a gear rack, an anchoring cross beam is arranged on one side of the machine arm, a front beam transporting vehicle and a rear beam transporting vehicle are arranged below the machine arm, and a hanging curved beam is installed on one side of an upper lug beam of the machine arm. The device is suitable for the width-limiting working condition of portal piers after construction of upper-layer cast-in-place beams of double-layer beams erected by a bridge girder erection machine and the height-limiting working condition of erecting lower-layer beams, low-clearance-height beam erection of the lower-layer beams under the double-layer beam working condition can be achieved, and narrow-width space beam erection of the lower-layer beams under the double-layer beam working condition can be achieved; the anchoring type hanging curved beam is adopted to replace a second column to hang the machine arm, and the hole passing and beam erecting requirements of the bridge girder erection machine are met.

The utility model relates to the technical field of curved beam construction, and provides a curved steel box beam pushing device which comprises a bottom frame. The plurality of transverse pushing devices are arranged on the bottom frame and are used for linearly pushing the steel box girder; the multiple steering pushing devices are arranged on one side of the transverse pushing devices, one transverse pushing device and one steering pushing device form a group, and the multiple groups jointly conduct pushing operation on the steel box girder. By means of the technical scheme, the problem that in the prior art, after relative rotation of the beam body occurs, an existing pushing device can only move transversely or longitudinally, rotation of the beam body can be achieved only through other methods by field operators, and consequently the construction efficiency of the curved beam is low is solved.

A constant force mechanism comprises a rack, a moving part, an output part, a positive stiffness structure and a negative stiffness structure, and the moving part is movably arranged on the rack; the output part is movably arranged on the rack, and the output part is movably connected with the moving part and drives the moving part to move, so that the output part and the moving part get close to each other or get away from each other; the positive stiffness structure comprises a first curved beam and a second curved beam which are connected between the rack and the moving part, and the first curved beam and the second curved beam are arranged in a crossed mode. The negative stiffness structure comprises a first permanent magnet and a second permanent magnet, the first permanent magnet is arranged on the rack, the second permanent magnet is arranged on the side, away from the positive stiffness structure, of the moving part, and the S pole of the second permanent magnet is opposite to the N pole of the first permanent magnet, or the N pole of the second permanent magnet is opposite to the S pole of the first permanent magnet. According to the constant force output device, the elastic deformation force of the positive stiffness structure and the magnetic force of the negative stiffness structure are overlapped, so that the resultant force is kept constant within a certain displacement range, and constant force output is achieved.

The invention relates to the technical field of metamaterials, in particular to a controllable buffering and energy-absorbing negative-stiffness metamaterial which is formed by periodically arranging a plurality of same unit cells. The unit cell includes: a frame; the curved beam is arranged in the frame; the push rod is movably arranged on the frame and is in transmission connection with the curved beam; the air bag is arranged between the frame and the curved beam, and the air bag and the push rod are located on the two sides of the curved beam respectively; adjacent unit cells on different layers are connected with the middle parts of the curved beams and the bottom of the frame through push rods; the adjacent unit cells located on the same layer are connected through a shared frame. The curved beam is of a bistable structure, and after the curved beam is subjected to geometric deformation under the action of an external load, the curved beam can be converted from an initial first stable state to a second stable state and keep a configuration. A curved beam with a buckling step property and an air bag with controllable gas pressure are used, and through combination of the curved beam with the buckling step property and the air bag with controllable gas pressure, the negative stiffness metamaterial with the curved beam capable of being controlled to reset and used for buffering and energy absorption is constructed.

The present invention discloses a design method for a high-speed maglev spatial curve beam, which includes: obtaining and determining the layout parameters of the spatial curve beam, including the beam span length, the minimum plane radius, the minimum vertical radius, and the minimum combined radius; obtaining the sectional boundary parameters of the spatial curve beam, including the boundary parameters of the beam top plate and the web; and designing the structural surface of the spatial curve beam according to the layout parameters and sectional boundary parameters of the spatial curve beam. With the layout parameters and sectional boundary parameters of the spatial curve beam as inputs, the structural surface of the spatial curve beam is designed through the above parameters, and different structural surface designs are adopted for different radius positions of the line. The beam is separated from the long-span bridge, and by reducing the length of the beam and lowering the beam height, it is convenient to adjust the beam line type; and in the large curve section, the design method of using folds instead of curves is adopted, reducing the required mold specifications and facilitating the millimeter-level adjustment requirements during the installation of the track beam, so that the spatial curve beam can meet the accuracy requirements of high-speed maglev track operation.

The invention discloses a knee joint assisting exoskeleton, and belongs to the field of exoskeletons. The first and second inertial measurement sensors are arranged on the thigh and shank clamp mechanisms; a shell of the power assisting mechanism is fixed to the thigh clamp mechanism. A first rack and a second rack are arranged on the two sides of the shell in a sliding mode. The motor is fixedly arranged on the shell and sleeved with the first gear, the second gear and the third gear are meshed with the first gear, the fourth gear and the third gear are meshed, and the second gear and the fourth gear are meshed with the first rack and the second rack on the corresponding side. Two ends of the first and second connecting rods are respectively fixed with the lower parts of the two first and second racks; the first ends of the first and second curved beams are respectively sleeved on the first and second connecting rods; two ends of the third connecting rod are fixed with the shank clamp mechanism; the second ends of the first curved beam and the second curved beam sleeve the third connecting rod; the plantar pressure sensor is arranged on the plantar; the first inertial measurement sensor, the second inertial measurement sensor, the motor and the plantar pressure sensor are electrically connected with the development board. Accurate matching of knee joint motion characteristics and rigidity requirements can be achieved.

The present invention discloses a deformation mechanism for the front middle section of a supersonic aircraft cabin. The driving mechanism includes a curved beam, which is the main load-bearing structure of the driving mechanism and is fixed to the front and rear ends of the front middle section of the aircraft cabin; four fan-shaped bottom plates of the same size are equally fixedly connected to the curved beam; a linear guide rail is connected to and fully fits the bottom of the curved beam, and a linear motor group is provided on the linear guide rail, which moves along the linear guide rail; the linear motor group is connected to a slider group through a push rod; a guide rail is provided on the fan-shaped bottom plate for the slider group to move up and down; a synchronous connecting rod passes through the holes on the slider group and the perforated plate to realize the synchronous movement of the slider group; the driving mechanism of the present invention is a synchronous motion device of three groups of slider mechanisms driven by a single motor module, which realizes the problem that the front middle section of a single aircraft cabin has a variable lift-to-drag ratio to meet different flight missions.

The application relates to the technical field of highway and railway bridge design, and discloses a corrugated steel web curved box girder torsional stress analysis method based on prestress effect, which comprises the following steps: S1, determining the mechanical characteristics of the corrugated steel web box girder bridge; S2, performing equivalent load processing on the prestress effect and performing reasonable simplification; S3, establishing a constraint torsion differential equation of the corrugated steel web combined curved box girder to obtain the constraint torsional normal stress and the constraint torsional shear stress of the required section; S4, combining the curved beam boundary conditions, the torsional double moment and the torsional stress formula of the box girder under various load conditions, adopting the initial parameter method to superimpose the boundary conditions into the general solution form of the constraint torsion differential equation of the corrugated steel web combined curved box girder, extracting the calculation data of the torsional stress of the corrugated steel web combined curved box girder, and analyzing to obtain the torsional stress result of the corrugated steel web combined curved box girder. The corrugated steel web curved box girder bridge torsional performance based on the prestress effect is researched by adopting the application.

The invention relates to a quasi-zero stiffness vibration isolation cell based on a flexible curved beam, a design method and a vibration isolator. Each cell comprises a first platform, a second platform, two first flexible curved beams and n second flexible curved beams, and n is a positive odd number. The first platform and the second platform are arranged in parallel in a spaced mode, the flexible curved beams are arranged between the two platforms, the n second flexible curved beams are arranged between the two first flexible curved beams arranged in the same direction, one end of each flexible curved beam is in rigid connection with the first platform through a support, and the other end of each flexible curved beam is in rigid connection with the second platform through a support. The mandrels of the flexible curved beams are cubic non-uniform B-spline curves defined by the same control point, the width of the cross section of the second flexible curved beam is twice that of the cross section of the first flexible curved beam, a gap is formed between every two adjacent flexible curved beams, and the flexible curved beams are arranged at an angle of 180 degrees. The cellular structure is simple and compact, most of harmful vibration can be effectively isolated, and yawing moment in the horizontal direction can be mutually offset.

A radiotherapy device (100, 320) and a magnetic resonance guided radiotherapy system (300, 400, 500, 600, 700). The radiotherapy device (100, 320) can include an electron gun (110) and a curved beam current deflection unit (120, 409, 509, 609, 709). The beam current deflection unit (120, 409, 509, 609, 709) is configured to accelerate an electron beam output by the electron gun (110) over a range of magnetic field strengths (B0). The magnetic resonance guided radiotherapy system (300, 400, 500, 600, 700) can include the radiotherapy device (100, 320) and a magnetic resonance imaging device (310).

The utility model discloses a special template for assembling and welding a roof framework of a passenger car, which belongs to the field of frame welding and comprises a template body, a first flat gasket is mounted at the upper top end of the template body through a cylindrical head socket head cap screw, a compression component is arranged on one side of the template body, and a second flat gasket is mounted at the other side of the template body. The pressing assembly comprises an edge beam pressing device and a pressing device screw combination, the edge beam pressing device is installed at the upper top end of the first flat gasket, the pressing device screw combination is installed on the outer wall of the edge beam pressing device, and through cooperative use of all the devices, in the machining process, the edge beam pressing device is used for pressing the edge, so that the machining efficiency is improved. The profile tolerance between the camber beam and the edge beam is guaranteed so as to achieve the effect of improving the flatness, meanwhile, the flatness between the longitudinal beam and the camber beam is guaranteed through the inner base plate and the outer base plate, the accuracy of the coach roof during machining and welding is further improved, the welding quality is improved, and the consistency between formworks can be improved through the arrangement of the multiple fixing plates.

An interposer configured for creating multiple connections between electrical components is described. Contacts of the interposer are configured to produce a nonlinear force when compressed. A high spring rate is achieved from zero force to an acceptable force for establishing sufficient electrical connection between the electrical components; and then a lower spring rate is achieved for the remainder of the deflection to minimize the maximum force at the maximum designed compression. The contact includes a curved beam, a tail, and a landing strip. It may also include a solder ball connected to the tail. When the contact is compressed, the curved beam traces an arc in one direction, while the part of the contact touching the landing strip slides along the landing strip in the other direction, thereby reducing the force produced by the contact.

The utility model discloses a pushing support structure for bridge construction, and belongs to the technical field of bridge construction. A pushing support structure for bridge construction comprises a horizontal support table and further comprises two sets of sliding bases which are arranged on the horizontal support table in a sliding mode, rotating bases are arranged on the two sets of sliding bases in a lifting mode respectively, adapter bases are rotationally arranged in the rotating bases, and bearing tables are fixedly arranged at the ends, away from the rotating bases, of the adapter bases; a driving part for driving the adapter to rotate is arranged on the rotating seat; the rotating seat is arranged on the top of the sliding seat in a lifting mode, the adapter seat is rotatably arranged on the top of the rotating seat, then the bearing table is fixedly arranged on the top of the adapter seat, the worm drives the worm gear to rotate, the adapter seat and the bearing table can be driven to rotate, a linear beam body can be supported, and the bearing table can be driven to rotate. And the curved beam body can be effectively supported, and the application range is widened.

The present invention discloses a landing gear, a design method thereof, and an aircraft, relating to the technical field of landing gear. The landing gear comprises at least two skids, at least two buffer beams, and at least two mounting brackets. The two skids are arranged opposite each other. The buffer beam connects the two skids and protrudes upward. The buffer beam comprises a transverse beam section and two curved beam sections, with the curved beam sections connected between the transverse beam section and the skids. The mounting brackets are used to connect to the aircraft body. The two mounting brackets are disposed at opposite ends of a transverse beam section, with a spacing d between the two mounting brackets. The width of the landing gear in the distribution direction of the mounting brackets is D, and 0.3≤d / D≤0.7 is achieved. The technical solution provided by the present invention can enhance the cushioning and energy absorption effect of the landing gear.