92 results about "Curved beam" patented technology

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.

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 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 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.

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.

The utility model belongs to the technical field of cantilever bridge fabrication machines, and particularly relates to an outer mold suspender suitable for a curved beam intelligent suspension grouting bridge fabrication machine, which comprises a suspender, a suspender connected to the bottom of the suspender and a conversion suspension frame connected to the bottom of the suspender, and an anti-falling rod group is connected between the bottom end of the suspender and the top end of the conversion suspension frame. The hanging belt is arranged on the anti-falling rod set in a sleeving mode, the anti-falling rod set comprises an upper rod body, a lower rod body, a lock hook, a lock groove and a locking spring, the top end of the upper rod body is connected with the bottom end of the hanging rod through a spherical hinge structure, the bottom end of the lower rod body is connected with the top end of the swivel hanging frame through a spherical hinge structure, and the bottom end of the upper rod body is inserted into the lower rod body from the top end of the lower rod body. The lock groove is formed in the side face of the lower rod body, the lock hook is arranged in the upper rod body in a penetrating mode, the top end of the lock hook extends out of the side face of the upper rod body, the bottom end of the lock hook abuts against the inner wall face of the lower rod body, and the locking spring is arranged between the upper rod body and the lock rod. The anti-falling device has the advantages of falling prevention, high safety and high stability.

The utility model discloses a kind of automobile front suspension beam structure, it is related to automobile parts technical field, to solve the problem of traditional beam and plate spring connection positioning difference, easy to loosen. It includes beam body, beam body contains straight beam part and two end bent beam part, and connecting cylinder is equipped at the two ends of bent beam part;The top surface of the two ends of straight beam part is equipped with connecting square plate, and connecting square plate and straight beam part are equipped with boss, and boss is equipped with connecting hole, and connecting square plate is equipped with positioning recess and positioning hole. Straight beam part and bent beam part are equipped with contour reinforcing rib, and diagonal reinforcing rib and weight-reducing hole are equipped between straight beam part contour reinforcing rib;Boss is equipped with step hole, and connecting reinforcing rib is equipped between boss, and bent beam part and connecting cylinder joint are equipped with reinforcing protrusion. The structure can improve the positioning accuracy and stability of plate spring connection, and consider strength and light weight, adapt to commercial vehicle demand.

The application discloses a compliant variable stiffness curved beam supporting ultra-low frequency vibration isolation device, which comprises a main frame, a main connecting rod movably arranged in the main frame, and a negative stiffness mechanism and a positive stiffness mechanism coupled in parallel to the main connecting rod, wherein the negative stiffness mechanism with nonlinear negative stiffness is sleeved on the main connecting rod, the positive stiffness mechanism with nonlinear positive stiffness is fixed at one end on the main frame and is fixedly connected at the other end with the main connecting rod, the nonlinear positive stiffness mechanism is used for modulating the nonlinear negative stiffness mechanism, and the high static stiffness and low dynamic stiffness characteristics are realized. The application adopts the arc-shaped beam with double-end clamping to provide the nonlinear negative stiffness, adopts the spiral-shaped beam to provide the nonlinear positive stiffness and the guiding function, and adopts the parallel arc-shaped beam and spiral-shaped beam to realize the high static stiffness and low dynamic stiffness characteristics. The stiffness of the vibration isolation device only needs to be modulated by adjusting the coupling connection relationship of the positive stiffness mechanism and the negative stiffness mechanism, the configuration parameters of the elastic elements do not need to be changed or the elements do not need to be replaced, the stiffness modulation is flexible, and the ultra-low dynamic stiffness can be easily realized. The vibration isolation device adopts the compliant design, is convenient to assemble, has no motion gap and contact friction limitation, and can realize the ultra-low frequency vibration isolation.

The invention relates to the technical field of pipeline vibration reduction, in particular to a low-frequency vibration reduction device suitable for pipelines of various specifications. The upper circular hoop and the lower circular hoop are oppositely arranged and are connected through a bolt; the plurality of softened rigidity annular pads are arranged on the inner sides of the upper circular hoop and the lower circular hoop at intervals; the side faces of the two softening rigidity annular pads are arranged on the two sides of the lower circular hoop in an attached mode respectively. The softening rigidity base and the softening rigidity annular pad are both made of elastic materials. The softening rigidity base is provided with a plurality of base vibration reduction holes, and the base vibration reduction holes are spaced through oblique and long base curved beams and vertical and short base center rods. The softened rigidity annular cushion is provided with an annular cushion center hole and a plurality of annular cushion side holes which are spaced through annular cushion curved beams. The vibration response of pipelines of different specifications under the low-frequency working condition can be remarkably reduced, and therefore effective control over low-frequency vibration is achieved; and the overall deformation and the equivalent stiffness of the pipeline system can also be regulated and controlled so as to meet the requirements of different working conditions.

The application relates to the technical field of landscape bridges, and discloses a circular-rib arch bridge and an arch bridge construction method, which comprises arch bridge units, each of which comprises an arch bridge main frame and an arch ring assembly arranged above the arch bridge main frame; the arch bridge main frame comprises a first base, curved beam parts symmetrically arranged at two ends of the first base and cross beam parts, one end of each curved beam part is fixedly connected with the first base, the other end is connected with a cross beam part, a bridge deck is arranged between the two cross beam parts, and each cross beam part is provided with a second base for supporting the cross beam part at an end away from the curved beam part along a second direction; and the first base comprises two bearing platforms, and a main arch ring is arranged between the two bearing platforms; the arch ring assembly is symmetrically arranged at two ends of the main arch ring along a first direction, the arch ring assembly comprises a main circular arch and secondary circular arches arranged at two ends of the main circular arch along the first direction, the bottom end of the main circular arch is fixedly connected with the bearing platform, and one end of each secondary circular arch is hingedly connected with the main circular arch.

1. Name of the product in this design: Tricycle windshield (curved beam No. 3). 2. Purpose of this design: For use as a windshield for electric tricycles. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a floating truss platform for a marine pond, comprising: a plurality of first floating buoys, which are connected at the head and tail to form a ring-shaped floating base, and vertical columns are distributed around the circumference of the ring-shaped floating base; curved beams, which are connected between two adjacent vertical columns in the circumferential direction, and the curved beams are arranged in the shape of a circular arc, and the curved beams and the vertical columns are connected to form a cylindrical wall frame, and a wall mounting area is defined by two adjacent vertical columns in the circumferential direction and two adjacent curved beams in the axial direction; a plurality of bottom beams, one end of each of which is connected to the lower end of a vertical column, and the other end of each of which extends to the center of the base circle of the ring-shaped floating base along the radial direction of the ring-shaped floating base, and the bottom beams are connected to form a bottom frame; second floating buoys, which are connected to the lower end of the bottom beams and are distributed along the length of the bottom beams; and a bearing platform, which is connected to the upper end of the vertical columns; and the first floating buoys, the vertical columns, the curved beams, the bottom beams, the second floating buoys and the bearing platform are all made of HDPE concrete.

The application relates to a variable-width spiral spring design method and a spiral spring, and belongs to the technical field of spiral springs, which comprises the following steps: S1, determining the polar angle corresponding to a planar spiral line at different arc length positions; S2, determining the curvature radius corresponding to the planar spiral line at different polar angle positions; S3, designing the preliminary section width of the spiral spring according to different curvature radius positions; and S4, adjusting the preliminary width of the spiral spring according to the size of the radius-to-half-thickness ratio of different positions, so that the uniform distribution of bending stress is realized. The core of the application lies in that the corresponding width change law is designed according to the bending stress change law with the curvature radius disclosed by the curved beam theory. Through the method, the maximum bending stress of all sections can be equal, so that the load capacity and stability of the spiral spring are improved.

This invention relates to the field of spinal correction device technology, specifically a dynamic pressure-relieving spinal correction bandage. The invention includes two fixed end plates and a deformation zone connecting them. The deformation zone is composed of multiple rows of staggered circular connection points connected to an S-shaped curved beam, with adjacent rows differing by one connection point, forming a deployable mesh structure. When the bandage is subjected to longitudinal tension, the S-shaped curved beam gradually unfolds from its bent configuration, causing lateral displacement of the connection points. This increases the effective contact width of the deformation zone with increasing tension, exhibiting two-stage variable stiffness mechanical characteristics. Under static conditions, it provides stable corrective restraint force, ensuring spinal correction effectiveness; during large-scale body movements, it automatically expands to distribute pressure, relieving local compression and breathing constriction, balancing corrective effect with wearing comfort, and effectively improving patient long-term compliance.

This invention provides a method for erecting curved beams, relating to the field of railway construction technology. The method includes: passing a bridge erecting machine through a span; shifting the front end of the bridge erecting machine's boom outward from the curve while simultaneously shifting the middle of the boom inward to determine the positions of the front and rear lifting points, and simultaneously bringing the rear end of the bridge erecting machine closer to the curve; rotating the bridge erecting machine's No. 3 column upward by 90°, and moving it below the bridge erecting machine via a front beam transport vehicle and a rear beam transport vehicle carrying the beam segments, so that the front lifting hole of the beam segment at the front beam transport vehicle is laterally aligned with the front lifting point; moving the beam-carrying trolley of the front beam transport vehicle forward relative to the main vehicle of the front beam transport vehicle, and the rear beam transport vehicle moving with the beam-carrying trolley of the front beam transport vehicle, to longitudinally align the front lifting hole of the beam segment with the front lifting point; and moving the beam-carrying trolley of the rear beam transport vehicle laterally relative to the main vehicle of the rear beam transport vehicle, to laterally and longitudinally align the rear lifting hole of the beam segment with the rear lifting point. This method improves the efficiency of curved beam erection.

The application discloses a three-dimensional curved surface beam plate unit and a mixed point array structure thereof. The unit comprises an outer frame and a BCC framework, the BCC framework is located in the unit and is connected with the outer frame through nodes; the outer frame comprises symmetrically arranged upper curved surface plates and lower curved surface plates, and one recessed curved beam rod is arranged between the four corners of the upper and lower curved surface plates, so that the outer frame forms a concave structure; the BCC framework is composed of eight inclined beam rods, the inner ends of the eight inclined beam rods are connected with each other and located at the center point of the unit, and the outer ends of the eight inclined beam rods are connected with the four corners of the upper and lower curved surface plates respectively. The point array structure is composed of a plurality of periodically arranged units. The application fuses various elements of curved surface, beam and plate and realizes multi-level design to obtain a controllable mixed point array structure with light weight, high strength, high heat dissipation efficiency, impact resistance, vibration reduction and noise reduction.

The invention discloses a vibration damping device with torsional rigidity and a tank artillery system, and the vibration damping device comprises a first mounting plate which is used as a first connecting part and is used for connecting a vibration-damped object; the camber beam structure comprises a plurality of camber beams, each camber beam is constructed by a polynomial function to form a thin-wall structure with an initial bending shape, and the thin-wall structure serves as a rigidity unit of the damping device; one end of each camber beam is connected with the first mounting plate, and the other end is connected with the second mounting plate; the damper serves as a damping energy consumption unit of the vibration reduction device, and the two ends of the damper are connected with the first mounting plate and the second mounting plate correspondingly; the dampers and the camber beams are arranged at intervals; and the second mounting plate serves as a second connecting part and is used for connecting a foundation. The problem of low torsional rigidity of a vibration reduction system of the rotating device is solved, and accurate control over the rotating angle is achieved while the vibration reduction performance is guaranteed.

The application belongs to the technical field of radio frequency MEMS, and particularly relates to an X-shaped upper electrode type MEMS single-knife six-pole switch, which comprises a substrate, a microwave transmission line, a switch assembly and an air bridge. The microwave transmission line is arranged on the substrate. The microwave transmission line comprises an input signal line, a power divider, an output signal line and a ground line. The input signal line is arranged in one piece. The output signal line is arranged in six pieces. The input signal line is connected with the power divider. The power divider is connected with the output signal line through the switch assembly. The switch upper electrode of the application adopts an X-shaped double-end fixed beam structure. The anchor point is connected with the straight plate structure through a right-angle curved beam. The length of the upper electrode is indirectly increased. The elastic coefficient of the beam is reduced. The driving voltage is further reduced. The lower electrode top end adopts a semicircular structure. A funnel-shaped gradient structure is adopted at the connection position of the signal line. The two structures can reduce the coupling capacitance between the upper electrode and the lower electrode and improve the isolation of the switch. In addition, the three circular contacts are connected in parallel. The contact resistance is small. The current density is more uniform. The purpose of improving the insertion loss and improving the switch power capacity is achieved.

The present application belongs to the field of local resonance beam vibration isolation, and particularly relates to a programmable vibration suppression method and structure based on a local resonance metamaterial beam; the method is electrically connected with a piezoelectric sheet of the local resonance metamaterial beam, the metamaterial beam contains a combination curved beam resonator with four steady state combinations, and the code is composed of the steady state combinations; an elastic wave vibration signal at an excitation end is collected and preprocessed, a dominant frequency is extracted through fast Fourier transform, a control instruction is issued after matching a target code, and the steady state combination of the combination curved beam resonator driven by the piezoelectric sheet is switched to make the metamaterial beam form a band gap matching the dominant frequency. The present application realizes real-time on-demand vibration suppression of elastic waves, solves the problem that a traditional passive vibration isolation system cannot dynamically adjust the vibration isolation characteristics, and is suitable for a dynamically changing external excitation environment, with fast vibration isolation response speed and strong adaptability.

The invention discloses a hoisting tool for a cylindrical equipment assembly, relates to the technical field of hoisting, and is used for solving the problems that in the prior art, the gravity center of the cylindrical equipment assembly is easy to shift and the cylindrical equipment assembly is easy to overturn in the hoisting process due to a traditional hoisting mode of two hoisting belts. The device comprises a cross beam unit, a hanging ring, a first fixing unit and a second fixing unit, the hanging ring, the first fixing unit and the second fixing unit are all arranged on the cross beam unit, the hanging ring is used for being connected with hoisting equipment, and the first fixing unit and the second fixing unit are arranged at the two ends of the cross beam unit. And the hoisting device is used for fixing the cabin section and realizing hoisting of the cabin section with a conical barrel-shaped structure. A plurality of positioning holes are formed in the camber beam, and bolts penetrate through the positioning holes and the mounting holes, so that the camber beam is connected with the cabin section body, axial sliding of the cabin section in the hoisting process is prevented, the overturning possibility is reduced, and the hoisting safety and stability are improved.

The utility model provides an external taper thread root fillet rolling device. The external taper thread root fillet rolling device comprises a positioning rod, a taper cylinder block fixedly arranged at the end of the positioning rod, a camber beam fixedly arranged on the taper cylinder block, a supporting cylinder obliquely installed at the end of the camber beam, a hydraulic cylinder fixedly arranged in the supporting cylinder, a rolling seat fixedly arranged at the end of a piston rod in the hydraulic cylinder, and a rotating roller arranged at the end of the rolling seat. And the high-precision, efficient, safe and reliable machining process is achieved. According to the utility model, not only are powerful driving force and accurate control provided, but also a good reset function and wide applicability are achieved, and the device is very suitable for the industry needing high-quality thread machining. The design not only improves the production efficiency and the product quality, but also reduces the maintenance cost and the technical difficulty, and has remarkable technical advantages and practical application value.

The present application relates to a tunnel lining external load inversion method and system based on a physical information neural network, obtaining monitoring data of the inner surface of the tunnel lining to be inverted; according to curved beam theory, establishing a control equation of external load and lining neutral axis deformation, and determining boundary conditions; according to the theory of material mechanics, establishing the corresponding relationship between the strain and displacement of the inner surface of the lining and the strain and displacement of the neutral axis position; constructing a physical information neural network, taking the spatial coordinates of the lining as the input of the physical information neural network, and taking the normal displacement, tangential displacement of the neutral axis at different coordinates and the external load of the lining as the output, and converting the neutral axis displacement into the strain and displacement of the inner surface of the lining; through training of the physical information neural network, the input-output relationship satisfies the control equation of the external load and the lining deformation, the boundary conditions and the monitoring data, and the normal displacement, tangential displacement of the neutral axis at the corresponding coordinates and the external load of the lining are obtained, which are the inversion results.

TITLE: METAL-TEXTILE TYPE BUILDING STRUCTURE One aspect of the invention relates to a metal building structure 1 comprising a mast 2 extending longitudinally along a principal vertical axis X and a framework 3 comprising: A first generally circular arch 4 coaxial with said mast 2; A plurality of framework elements 5 arranged around said mast 2, each framework element 5 extending radially between said mast 2 and said first arch 4, each framework element 5 comprising: A straight beam 6 perpendicular to said principal axis X and extending between said mast 2 and said first arch 4; A curved beam 7 arranged opposite said straight beam 6 and extending between said first arch 4 and an upper end 8 of said mast 2. Figure to be published with the abbreviation: Figure 2

The invention discloses an equipment compartment and a railway vehicle, and relates to the technical field of railway vehicles, the equipment compartment comprises a framework, the framework comprises an edge beam, a cross beam and a bent beam, the edge beam is of a step structure and is provided with a first step surface and a second step surface, the cross beam is connected with the first step surface, and the bent beam is connected with the second step surface. The boundary beam is arranged to be of the step structure, direct assembly between the boundary beam and the cross beam and between the boundary beam and the camber beam can be achieved, angle iron or a transition base structure is not needed, and therefore the structure is simplified, and the weight is reduced. By designing the structure of the edge beam, the edge beam has the function of being directly fixed to the cross beam and the bent beam, and therefore a transition base and related fixing parts are thoroughly omitted, the overall structure and the assembly process of the equipment compartment are remarkably simplified, the overall weight of the equipment compartment is effectively reduced, and the overall structure is more compact. The dual technical effects of structure optimization and light weight are achieved.

The chassis frame comprises a longitudinal beam assembly and a cross beam assembly, the longitudinal beam assembly comprises a first longitudinal beam and a second longitudinal beam, the first longitudinal beam and the second longitudinal beam are arranged in a spaced mode in the first direction, and the longitudinal beam assembly is provided with a narrowing section and a broadening section in the second direction. The narrowing sections and the broadening sections are in smooth transition through camber beams, and the distance between the first longitudinal beam and the second longitudinal beam in the narrowing sections is smaller than the distance between the broadening sections; the cross beam assembly comprises a front cross beam and a rear cross beam, the front cross beam is riveted between the first longitudinal beam and the second longitudinal beam and located at the narrowing section, the rear cross beam is riveted between the first longitudinal beam and the second longitudinal beam and located at the broadening section, and a closed frame is defined by the front cross beam, the rear cross beam, the first longitudinal beam and the second longitudinal beam; the longitudinal beam assemblies and the cross beam assemblies are groove-shaped beams. The chassis frame is basically free of a welding structure, is light in overall weight and low in cost, and can meet the steering requirement of the front wheels and the overall strength requirement of the chassis frame at the same time.

The invention discloses an anisotropic physical field simulation modeling method and system for a complex tube bundle structure of a boiler water-cooled wall based on heterogeneous geometric equivalence, and the method comprises the steps: geometrically mapping a hollow circular tube structure with a complex curvature into a regular rectangular entity unit, and carrying out the modeling of an anisotropic physical field of the complex tube bundle structure of the boiler water-cooled wall based on the principles of energy conservation, rigidity conservation and thermal resistance conservation. And a set of complete virtual anisotropic material constitutive model is deduced and established. The model is based on path extension and section correction theories in the tangential direction (X direction), introduces logarithmic thermal resistance equivalence and circular ring curved beam rigidity theories in the radial direction (Y direction), and adopts a bearing area scaling criterion in the axial direction (Z direction); therefore, the equivalent simplified model is highly consistent with an original physical structure in macroscopic thermal resistance, structural rigidity, thermal deformation and three-dimensional shearing behaviors. By means of the method, engineering personnel can reduce the calculation freedom degree by a plurality of orders of magnitude on the premise that the accuracy of key physical characteristics is not sacrificed, and the efficiency of thermal fatigue life evaluation and structure optimization design of the water cooling wall of the supercritical boiler is remarkably improved.

The present application relates to a kind of combination space arch rib structure and method of skew arch curved beam, belong to large-span skew arch curved beam technical field, by adopting the combination space arch rib structure of skew arch curved beam, effectively disperses and transmits load, reduce the pressure to ground, then using the way that steel structure arch rib body is combined with concrete filling unit, both can utilize the good toughness of steel structure, also can exert the high compressive strength of concrete, the positioning assembly set in the interior of steel structure arch rib body can effectively constrain the slippage of concrete filling unit, ensure the overall stability of structure, concrete filling unit adopts the combination of full filling, half filling, inside filling, outside filling and central filling etc., can be optimized according to different position and structure demand, both ensure the rigidity of structure, also avoid unnecessary material waste, solve the bridge stability and rigidity contradiction problem under soft terrain.

The application provides a variable cross-section titanium alloy curved beam differential temperature forming method and device, which comprises the following steps: preparing a titanium alloy plate blank, connecting a flexible electrode chuck with the titanium alloy plate blank, and placing the titanium alloy plate blank between a forming lower die and a forming upper die; the flexible electrode chuck is electrified, so that the temperature of the titanium alloy plate blank reaches a first target temperature; the temperature of a flange area reaches a second target temperature, and the temperature of a web area reaches a third target temperature; the forming lower die and the forming upper die move towards each other, and the titanium alloy plate blank is formed into a variable cross-section titanium alloy curved beam under the action of pressure. The heat loss of the titanium alloy plate blank after contacting with the die is reduced, so that the material fluidity of the flange area in the forming process is enhanced; the temperature of the area responsible for forming the web is reduced, and the temperature of the titanium alloy plate blank is taken away, so that the compression resistance of the web area in the forming process is enhanced, and the web wrinkling defect in the part forming process is inhibited.

The invention discloses a straddle type monorail single-crossover turnout beam static trial assembly method, and relates to the technical field of rail transit steel structure manufacturing, and the method comprises the following steps: S1, arranging a single-crossover turnout beam trial assembly ground platform assembly; s2, releasing longitudinal and transverse base lines of the ground platform assembly and a pivot mounting position base line; s3, a pivot assembly is hoisted, positioning is conducted according to the pivot installation position datum line, and after positioning, the pivot assembly and the ground platform assembly are fixed in a spot welding mode; s4, hoisting a turnout beam, and placing the turnout beam on the pivot assembly; s5, the steps S1 to S4 are repeated, and hoisting of the other three turnout beams is completed; s7, a stacking beam and a stacking beam positioning base are hoisted, and the stacking beam positioning base and the stacking beam are welded into a whole; s8, adjusting the distance between the straight beam and the curved beam of the two turnouts, and installing a connecting rod mechanism; and S9, the turnout beam is pushed to swing around the pivot on the ground platform assembly, and replacement of the straight beam and the curved beam is completed. The technical problem that in the prior art, a turnout beam main body steel structure lacks an appropriate trial assembly process is solved.