833 results about "Shaped beam" patented technology

The invention discloses a device and method for measuring dust concentration distribution at an inlet of an aero-engine, and belongs to the field of aero-engine sand swallowing tests, the device comprises a pulse laser light source, a shaping module, an optical image acquisition module and a data post-processing module, the pulse laser light source is arranged at a preset position around the aero-engine and is used for emitting laser beams, and the shaping module is used for shaping the laser beams; the aero-engine is located in a sand dust environment to be detected; the shaping module is used for receiving the laser beam and outputting a sheet-shaped beam; the optical image acquisition module is used for receiving coherent scattered light emitted by the grit in the irradiation area of the flaky light beam to form a laser speckle image, and transmitting the obtained laser speckle image to the data post-processing module; and the data post-processing module processes the laser speckle image by adopting an inlet sand dust concentration measurement algorithm to obtain the concentration distribution of the inlet sand dust of the aero-engine. The device is simple in structure, and is suitable for measuring the sand dust concentration distribution at the inlet in the sand swallowing experiments of aero-engines with different sizes or stages.

The invention discloses a fabricated building module anti-seismic connection node structure, which relates to the field of fabricated buildings, is used for connecting beam columns and I-shaped beams, and comprises two connection plates symmetrically mounted at the end parts of the I-shaped beams; the fixing base is fixedly installed on the beam column, two symmetrically-arranged bearing parts are arranged on the fixing base, inserting grooves allowing the connecting plates to be inserted are formed in the bearing parts, and the connecting plates are connected with the bearing parts through bolts; the N first friction pieces are arranged between the two bearing parts; the first friction pieces and the second friction pieces are distributed in a staggered mode to form a friction contact face, during an earthquake, displacement of the beam column and the I-shaped beam forces the first friction pieces and the second friction pieces to slide relatively, kinetic energy is converted into heat energy to be dissipated, meanwhile, the N first friction pieces and the N + 1 second friction pieces are staggered to form multi-point friction, and the friction contact face is formed. The energy consumption efficiency is gradually increased along with the displacement magnitude, the anti-seismic energy consumption capacity of the structure is greatly improved, and damage of an earthquake to a building structure is effectively reduced.

The invention discloses a composite material T-shaped beam forming method in the technical field of aviation, a forming die, a laying die and a bottom face forming die which are arranged in a split mode and can be combined are adopted, forming is conducted through a secondary hot-pressing curing process, and the method comprises the following steps that S1, preforming and R corner prefabricating are conducted, the independently-prefabricated prepreg core material is positioned in a T-shaped beam R-angle area formed after the prepreg core material and the T-shaped beam R-angle area are oppositely combined; and S2, first-time mold closing and pre-curing are carried out, specifically, the laying mold and the forming mold are oppositely closed, lateral auxiliary positioning is carried out through the bottom face forming mold, locking and fixing are carried out through a positioning pin and a clamping piece, and first-time hot-pressing curing is carried out on a combined body obtained after mold closing. According to the method, the independently prefabricated core material which is subjected to heat-sealing, pressing and pre-curing is filled in the R-angle area, and a secondary hot-pressing process of pre-curing and final curing is matched, so that sufficient pressure transmission and tight laying of the R-angle area are ensured, the defects of layering, bridging and the like are effectively avoided, and the percent of pass of nondestructive testing of products is remarkably improved.

The invention relates to the technical field of beam feeding of special-shaped beams, in particular to an F-beam feeding method which comprises the following steps that S1, a heightening joint is additionally arranged below each reverse supporting assembly of a middle supporting leg, and a lengthened main truss is installed on a main beam; s2, a block C is conveyed forwards, and after the front end of the block C penetrates through a rear supporting leg, a front hoisting trolley is controlled to be aligned with the hoisting point position of the front end of the block C; s3, the front crane carriage lifts the front end of the C block, and the distance between the highest position of the shoe-shaped gold ingot cross beam and the bottom face of the C block is larger than or equal to 10 cm; s4, the front hoisting trolley and the rear beam transporting trolley move forwards together, and the height from the highest position of the shoe-shaped gold ingot cross beam to the bottom face of the block C is kept to be larger than or equal to 10 cm all the time; s5, the rear hoisting trolley hoists the rear end of the block C until the block C is horizontal; and S6, the front hoisting trolley and the rear hoisting trolley jointly hoist the beam to move forwards to complete beam feeding. According to the beam feeding method, the risk that the C block collides with the shoe-shaped gold ingot cross beam is reduced.

The invention discloses an I-shaped column-full dry type connection RC beam column joint and a connection method, and belongs to the technical field of building structure engineering. The joint comprises a prefabricated I-shaped column, a stepped beam, a shear connector and a U-shaped connecting steel plate. A long bracket and a short bracket are respectively arranged at the top and the bottom of the I-shaped column; the end part of the step-shaped beam is in an inverted step shape and is provided with an extending section; the shear connector is a long-strip-shaped steel member provided with a screw rod; and the U-shaped steel plate is provided with screw holes which are respectively matched with the shear connector and the beam end screw. During connection, rapid assembly is achieved in the mode that the brackets of the upper column and the lower column are in lap joint, shear key grooves are interlocked, the shear connectors penetrate into the square holes, the beam bodies are supported on the combined brackets, and finally the U-shaped steel plates are used for anchoring. According to the joint, complete dry type operation is achieved, cast-in-place concrete and steel bar welding are not needed, the construction efficiency is remarkably improved, wet operation is reduced, loads can be borne after installation, the overall performance is reliable, and the development requirement of fabricated buildings is met.

The invention discloses a tunnel segment joint quality high-precision detection method and system based on an image stabilization mechanical arm. The device comprises a circular track patrol platform, the self-adaptive image stabilization mechanical arm and a macro-micro fusion detection module. The circular rail cruising platform comprises a cruising platform pedestal and a guide rail, the guide rail is installed on an H-shaped beam at the tail of the shield tunneling machine through a cushioning connecting piece, the guide rail is of a circular structure and is located in the shield tunneling machine, and the cruising platform pedestal is arranged on the guide rail and can move in the circumferential direction of the guide rail; one end of the self-adaptive image stabilization mechanical arm is mounted on the cruising platform pedestal, and the macro-micro fusion detection module is mounted at the other end of the self-adaptive image stabilization mechanical arm, so that the macro-micro fusion detection module synchronously moves along with the cruising platform pedestal and is arranged facing a joint of a segment to be mounted and a mounted segment. The invention relates to the technical field of tunnel construction, and can solve the problems of low efficiency, high risk and lagging of manual detection and large interference, low precision and poor flexibility of fixed equipment detection in the prior art.

The invention relates to the application of the Internet of Things technology in the technical field of shield tunnel design, and discloses a shield tunnel segment circular seam full-scale loading test device and method based on the Internet of Things, and the device comprises a steel frame supporting assembly which is used for providing a supporting frame of the whole test device. Comprising a supporting bottom beam, stand columns, a counter-force top beam, a counter-force bottom beam, a cross beam and a tensile diagonal rod, the stand columns are located on the supporting bottom beam, the counter-force top beam is arranged between the stand columns, the counter-force bottom beam is a box-shaped beam and is provided with a plurality of holes along the axis, and rotating shafts and brake bolt pins are arranged in the holes. Through the synergistic effect of the positioning steel tank, the positioning jack, the angle sensor and other components, accurate horizontal positioning and bilateral symmetry adjustment of the test duct piece can be achieved, in the test process, the strip-shaped hole design of the positioning steel tank allows the transverse rib of the inverted-T-shaped steel beam to slide left and right along the strip-shaped hole, and the fine adjustment function of the positioning jack is matched; and the duct piece can be ensured to be positioned at an accurate horizontal position and be bilaterally symmetrical before being loaded.

The invention discloses a stirrup assembly type concrete beam column structure, which relates to the technical field of building structures and comprises a prefabricated lower column, a prefabricated upper column, a left superposed beam and a right superposed beam, the prefabricated lower column, the prefabricated upper column, the left superposed beam and the right superposed beam are distributed in a cross-shaped beam column structure; unique double-spiral stirrup configuration is applied to the column body, so that the torsion resistance and the bearing capacity are enhanced; the longitudinal bars and the stirrups are reasonably arranged on the superposed beam, so that the bending resistance and the shearing resistance are guaranteed. At the joint, the T-shaped channel steel plates, the fixing blocks and the hinged tension connecting rods form an energy dissipation system, and earthquake energy is effectively dissipated. The column body connection adopts the combination of a full-grouting nodular cast iron sleeve and a frame-shaped steel belt, and is matched with a post-pouring laminated layer to realize rigid connection. The limiting mechanism anchors a T-shaped channel steel plate through a double-end pull rod and a self-locking nut, a limiting clamping plate and a torsion spring form anti-pulling self-locking, the anti-seismic property of the joint is enhanced by combining a hinged tension connecting rod, and the structural reliability is improved.

The invention provides a pen-shaped beam model construction method and device in a particle treatment planning system, equipment, a medium and a program product, which can be applied to the technical field of radiotherapy. The pen beam model construction method in the particle therapy planning system comprises the following steps: obtaining integral depth dose measurement data, beam spot measurement data and absolute dose measurement data of particle therapy equipment in the particle therapy planning system; respectively constructing an integral depth dose model, a beam spot model and an absolute dose model based on the integral depth dose measurement data, the beam spot measurement data and the absolute dose measurement data, and forming a pen beam model of the particle therapy equipment; performing simulation verification on the pen-shaped beam model, and adjusting corresponding parameters in the pen-shaped beam model according to difference data between simulation data and actual measurement data; and generating at least one quality assurance plan of the adjusted pen-shaped beam model under the condition that the adjusted pen-shaped beam model meets a preset error condition.

The beam and slab prefabrication integrated production line comprises a steel bar machining unit, a movable mold table, a mold closing mechanism, a concrete pouring unit, a steam curing unit and a finished product transferring unit which are sequentially arranged along a ground rail. A T-shaped steel reinforcement framework is formed by the steel reinforcement machining units, a pouring area is defined by the strip-shaped mold table, the T-shaped mold plate and the side mold plate through the unique structural design of the movable mold table, and the side mold plate can move along the oblique sliding base. The mold closing mechanism realizes mold closing through a hydraulic rod; the finished product transfer unit transfers finished products through cooperation of a hydraulic supporting rod and a transfer trolley. The production line effectively solves the problems of large demolding friction, high energy consumption, low efficiency and the like of a traditional T-shaped beam plate prefabrication production line, can improve the prefabrication quality and production efficiency of the T-shaped beam plate, and is suitable for large-scale bridge engineering construction.

The invention discloses a superconducting magnetic levitation U-shaped track beam and a preparation method thereof, and belongs to the technical field of bridge engineering.The superconducting magnetic levitation U-shaped track beam is used for running of a magnetic levitation train with superconducting coils arranged on the two sides of a train body, and the track beam comprises a plurality of track beam sections which are sequentially spliced in the longitudinal direction; each track beam section comprises a main beam body and two side plates arranged on the two transverse sides of the main beam body respectively, the two side plates and the main beam body are integrally formed to form a U-shaped beam body structure, a maglev train can run in the U-shaped beam body, mounting grooves are formed in the inner side wall faces of the two side plates and used for mounting ground coils, and the invention further provides a preparation method of the superconducting maglev U-shaped track beam. The superconducting magnetic levitation U-shaped track beam is formed by splicing the multiple track beam sections, the main beam body and the two side plates in the track beam sections are integrally formed, the number of joints of the track beam is greatly reduced, the smooth performance of the track beam is guaranteed, and the overall stability of a magnetic levitation track system is improved.

The invention belongs to the technical field of pultrusion, and discloses a J-shaped beam forming method based on a pultrusion RTM process and a J-shaped beam. The invention discloses a J-shaped beam forming method based on a pultrusion RTM process. The J-shaped beam forming method comprises the steps that a laying layer structure of a J-shaped beam is set; drawing the fiber fabric according to the layering structure; drawing the fiber fabric into a preforming mold for preforming; and pulling the pre-formed fiber fabric into a forming mold for final forming. A traditional autoclave forming process of the J-shaped beam is changed into a pultrusion forming process, a laying layer structure of the J-shaped beam is designed according to the structural stress and thickness of the J-shaped beam and is converted into a yarn fiber fabric of a pultrusion RTM process, and the yarn fiber fabric is subjected to preforming and final forming through a preforming mold and a forming mold. And the repeated heating and cooling process in the curing process in the autoclave forming process is simplified, and the production efficiency of the J-shaped beam is improved. The J-shaped beam disclosed by the invention has the advantages of net profile boundary and no need of additional processing.

The invention relates to the technical field of sensors, and provides a six-dimensional force and torque force sensor and a preparation method thereof.The six-dimensional force sensor is of a disc-shaped structure and comprises an outer supporting ring, an inner mass block and eight elastic beams connected between the outer supporting ring and the inner mass block; wherein the eight elastic beams comprise a first elastic beam and a second elastic beam which are alternately arranged around the inner mass block, the first elastic beam is a straight beam, the second elastic beam is a special-shaped beam, and a strain gauge preset on the main surface of each elastic beam responds to the strain of the elastic beam to generate a measurement signal; and the force and / or the torque applied to the inner mass block or the outer support ring can be determined according to the measurement signal. Due to the fact that the different elastic beams are different in shape and structure, the strain gauges are preset on the elastic beams of different types and positions, and the bridging mode is set, the output of each Wheatstone bridge is only sensitive to the force or the moment of force in the changed direction and is not sensitive to the force or the moment of force applied in other directions, and the decoupling capacity of the sensor structure is improved to the maximum degree.

The invention provides a construction method for installing a large-span special-shaped beam curved template system, and belongs to the technical field of building construction. According to the construction method, accurate three-dimensional modeling is conducted on the shape of a special-shaped beam through a special-shaped curved surface parametric modeling algorithm, and material prefabrication is guided; eight oscillation excitation devices and twelve vibration monitoring devices are optimally arranged by using experimental design and a graph theory analysis method to form a dynamic monitoring network, vibration response data are analyzed in real time by using a wavelet transform monitoring algorithm, and the energy ratio of each frequency band is calculated as a quality evaluation index. A game optimization model is established, and according to different ranges of energy ratios, the support spacing is automatically adjusted, a back ridge fixing mode is combined or a supporting system is reinstalled, so that a comprehensive quality assurance system of accurate geometric modeling-dynamic state monitoring-intelligent parameter adjustment is constructed. The technical problem that the installation quality of a large-span special-shaped beam curved template system is difficult to guarantee is solved.

The U-shaped beam stacking system comprises a waste material selecting part, a conveying and overturning part, a discharging trolley and a servo crane, U-shaped beams can be moved to the conveying and overturning part after being screened on the waste material selecting part, an overturning mechanism on the conveying and overturning part can drive the U-shaped beams to overturn, and the discharging trolley is used for discharging the U-shaped beams. The servo crane can grab and move the U-shaped beams on the conveying and overturning part to the discharging trolley, whether the U-shaped beams are overturned or not and staggered stacking or positive and negative stacking stacking of the U-shaped beams are achieved according to the stacking requirement, an active overturning arm of the overturning mechanism can replace a pneumatic plate overturning mechanism and double robots, the cost of the whole equipment is greatly reduced, and the working efficiency is improved. And in addition, the U-shaped beams can be stacked on the discharging trolley according to the stacking requirement, the labor intensity of workers is reduced, and the overall stacking operation efficiency is effectively improved.

The invention discloses a jig frame structure and method for movable deck welding deformation control. The jig frame structure is characterized in that a transverse supporting truss comprises a plurality of transverse T-shaped beams distributed at intervals; the longitudinal supporting truss comprises a plurality of longitudinal T-shaped beams which are distributed at intervals, each longitudinal T-shaped beam is perpendicular to the transverse T-shaped beams, and each longitudinal T-shaped beam is fixedly connected with the transverse T-shaped beams; two adjacent longitudinal T-beams and two adjacent longitudinal T-beams define a rectangular unit, a reinforcing plate is arranged in each rectangular unit, the reinforcing plates are parallel to the longitudinal T-beams or the transverse T-beams, and when the reinforcing plates are parallel to the longitudinal T-beams, the reinforcing plates are fixedly connected with the transverse T-beams; when the reinforcing plates are parallel to the transverse T-beams, the reinforcing plates are fixedly connected with the longitudinal T-beams. According to the jig frame structure, the internal stress of the movable deck can be effectively reduced, the camber of the transverse T-shaped beam and the longitudinal T-shaped beam is pre-increased in advance, a large amount of hot work correction work after completion is reduced, and the jig frame structure belongs to the technical field of ship accessory outfitting equipment manufacturing.

The invention relates to a synchronous loading and self-adaptive compensation system for a fatigue test and a working method thereof.The synchronous loading and self-adaptive compensation system for the fatigue test is characterized in that the synchronous loading and self-adaptive compensation system comprises a T-shaped beam capable of being connected with a fatigue testing machine, the two lower side portions of the T-shaped beam are connected with pentagonal steel plates respectively, and the pentagonal steel plates are connected with the T-shaped beam. A plurality of groups of loading units are mounted between the two pentagonal steel plates, each loading unit comprises a hard shell and a rotating disc rotationally connected with the hard shell, a driving mechanism for driving the rotating disc to swing and rotate is arranged on the hard shell, a spherical hinge is fixedly mounted on the rotating disc, and the rotating disc is fixedly connected with the driving mechanism. The lower part of the spherical hinge is connected with an electric telescopic rod which can be electrically controlled to stretch out and draw back, and the lower end of the electric telescopic rod is provided with a loading block acting on the test piece; the problems of'void impact 'and'loading eccentricity' are fundamentally solved, and efficient, accurate and safe multi-test-piece synchronous fatigue test is realized.

The invention relates to the technical field of bridge jacking construction, in particular to a large-area special-shaped continuous beam asynchronous jacking system and a jacking construction method. According to the method, jacking force is pre-distributed based on a finite element model and a historical data training machine learning algorithm, and high-precision deformation coordination control is achieved through a hydraulic jack group and a multi-sensor cooperative monitoring network (including displacement, strain, inclination angle and deflection parameters) placed on a special-shaped beam in combination with an iteratively optimized graded jacking and dynamic compensation strategy. Comprising the steps that the total jacking height is constructed in a graded mode, and in each stage of jacking, output of all fulcrums is adjusted in real time through a PLC so that the displacement synchronization error can be kept to be smaller than or equal to 0.5 mm; when it is monitored that local stress exceeds the limit, a dynamic compensation mechanism is triggered, and secondary balance of the load is achieved by jacking and accelerating an overstress point and jacking adjacent fulcrums in a reinforcement mode. According to the method, the problems of stress concentration, local support disengaging and the like caused by uneven stress in the jacking process of the special-shaped continuous beam are solved.

The invention provides a petal-shaped homogeneous phase nonlinear rotating beam generation method based on phase regulation and control. By designing a phase distribution function with spiral symmetry and combining dynamic regulation and control of morphological parameters and transmission distance, petal-shaped light beams with different petal numbers, rotation angles and energy distribution can be generated. The light beam shows a homogeneous phase characteristic, high directivity and a stable vortex structure in propagation, is especially suitable for the field of optical tweezers, forms a high-intensity focusing area by adjusting spiral symmetrical phase distribution, and can stably capture micron-sized particles.

The invention relates to the technical field of preparation of silicon carbide ceramic special-shaped beams, in particular to a pressureless sintered silicon carbide ceramic special-shaped beam and a preparation method thereof.The pressureless sintered silicon carbide ceramic special-shaped beam comprises the following components and structures: material composition: a base material is silicon carbide powder, the particle size is in bimodal distribution, a main phase is 3-5 microns, and a nanophase is 0.5-1 micron; a composite sintering aid; through innovative design of material composition and structure, multi-scale synergistic reinforcement and surface gradient protection are realized, bimodal distributed silicon carbide powder is adopted as a matrix, and through the synergistic effect of a micron-sized particle skeleton and nano-particle filling pores, internal cracks caused by uneven shrinkage of a special-shaped section are remarkably reduced, so that the surface gradient protection performance is improved. And meanwhile, the composite sintering aid can inhibit abnormal growth of crystal grains, synergistically reduce the sintering temperature and reduce the deformation risk of the multi-cavity structure, the crack propagation resistance of the corner angle is greatly improved through the gradient reinforcement phase, and the problem that a hardened layer at the special-shaped corner angle is not uniform is solved through deep siliconizing reinforcement.

The invention discloses a method and a device for calculating the bearing capacity of a corrugated steel web U-shaped beam under the action of bending, shearing and twisting, a steel structure part of the corrugated steel web U-shaped beam is equivalent to a concrete structure for simplified calculation, according to the Vlasov theory, the relationship among the warping bending moment, the warping torque, the free torque and the limit torque is obtained, and the bearing capacity of the corrugated steel web U-shaped beam is calculated. And the warping bending moment is distributed on the loading side semi-U-shaped cross section, the bending moment borne by the semi-U-shaped cross section is superposed, and the ultimate bearing capacity of the component is calculated according to the balance relation of the semi-U-shaped cross section. According to the technical scheme, compared with an existing concrete U-shaped beam model, the concrete U-shaped beam model can be suitable for more complex working conditions.

An antenna system steerable in any direction and methods of use are provided. In an embodiment, the antenna system comprises a substantially ellipsoid-shaped shell body and a plurality of cells coupled to the body, wherein each cell comprises a conductive material. In an embodiment, the shell body comprises a metasurface. In an embodiment, the antenna system further includes a plurality of switches coupled to the plurality of cells, wherein each switch is configured to change its coupled cell between reflective, transmissive, and absorptive states. The antenna system further includes a feed radiator located at or around the center of the shell body; a radio coupled to the feed; and a processor coupled to the feed, radio, and the plurality of switches, wherein the processor is configured to produce a shaped beam by controlling a subset of the plurality of switches.

The cantilever type retaining wall comprises a plurality of waste L-shaped beams, the sides, with flanges, of the waste L-shaped beams face a mountain, the bottoms of the waste L-shaped beams are embedded into the position below a foundation by a set depth, and the space between the waste L-shaped beams and the mountain is filled and tamped through lateral filling soil; the adjacent ends of all the waste L-shaped beams are fixedly connected through connecting transverse partition plates to form a retaining wall, and settlement joints are arranged on the retaining wall at equal intervals. The invention further discloses a construction method of the cantilever retaining wall for recycling the waste T-shaped beams. According to the method, the T-beam of the abandoned bridge can be reused, pollution of construction waste to the environment is reduced, the retaining wall built by the abandoned T-beam serves as a structure for supporting a natural or artificial slope mountain body to be free of collapse so as to keep the stability of a soil body, and great economic benefits and ecological benefits are achieved.

Methods for reticle enhancement technology (RET) for use with variable shaped beam (VSB) lithography include inputting a substrate design, wherein a low-pass filter is applied to the substrate design to form a target wafer pattern. An initial mask pattern is determined from the target wafer pattern. An initial set of VSB shots is determined based on the initial mask pattern. A substrate pattern is calculated from a simulated mask pattern calculated with the initial set of VSB shots. The target wafer pattern is compared with the substrate pattern, and the initial set of VSB shots is adjusted until the substrate pattern and the target wafer pattern are within a predetermined tolerance. The adjusting of the initial set of VSB shots creates an adjusted set of VSB shots.

The invention discloses a holosymmetric four-mass MEMS gyroscope which comprises four sensitive mass block coupling structures which are arranged in a central symmetry manner, and four first U-shaped beams, four n-shaped beams and a cross-shaped coupling structure which are arranged in a central symmetry manner and are connected with the four sensitive mass block coupling structures, compared with the prior art, the four sensitive mass block coupling structures are designed compactly and symmetrically, so that the sensitivity can be effectively improved, and thermally induced drift can be effectively reduced. The driving mode and the working mode are separated through the specific coupling mechanism, so that frequency coupling is avoided, and environmental vibration interference is reduced. And meanwhile, the symmetry of the structure is beneficial to uniform distribution of thermal stress or mechanical stress, so that zero drift caused by temperature change is inhibited.

The invention provides a friction stir welding aluminum alloy I-shaped beam pressure limp bearing capacity design method which comprises the following steps: acquiring key parameters of a friction stir welding aluminum alloy I-shaped beam test piece, including section size information, structural design parameters, material mechanical property indexes, welding seam parameters and geometric initial defects; calculating dimensionless parameters based on the key parameters; calculating a pressure limp bearing capacity theoretical value of the transverse stiffening rib-free aluminum alloy I-shaped beam when the transverse stiffening rib-free aluminum alloy I-shaped beam is subjected to concentrated load in the midspan according to European specifications or an American aluminum coordination design manual; real pressure limp bearing capacity data of the stirring friction welding aluminum alloy I-shaped beam are obtained through experimental testing and finite element simulation, and a correction coefficient is obtained through regression analysis fitting based on the real pressure limp bearing capacity data and dimensionless parameters; and the correction coefficient is multiplied by a standard theoretical value, or an American standard formula based on least square method regression correction is adopted, and the pressure limp bearing capacity design value of the friction stir welding aluminum alloy I-shaped beam is obtained.

The invention relates to the technical field of MEMS (Micro Electro Mechanical System) gyroscopes, and discloses an in-plane rotating MEMS gyroscope, which comprises two driving frames distributed along a second direction; the driving connecting frame is located between the two driving frames; the two coupling frames are distributed in the first direction and are both located in the driving connection frame; each coupling frame is provided with four orthogonal correction electrodes which are symmetrically distributed relative to the first direction and are antisymmetrically distributed relative to the second direction; the two detection frames are located between the two coupling frames; each detection frame is provided with two detection electrodes which are distributed in an anti-symmetric manner relative to the first direction; and the first inclined U-shaped beam can drive the two detection frames to do reverse reciprocating motion along the second direction in the detection mode. According to the in-plane rotating MEMS gyroscope disclosed by the invention, the structure of the MEMS gyroscope is optimized to improve the consistency of motion in a driving mode and inhibit coupling errors, so that the detection performance of the gyroscope is improved, and the in-plane rotating MEMS gyroscope is suitable for application scenes with higher requirements.

The invention provides a construction method for load decomposition and transmission of a special-shaped beam curved template, and belongs to the technical field of building construction.The load change of each node of the curved template is monitored in real time by establishing a load jump identification matrix, and a supporting system abutting stability matrix is constructed to evaluate the bearing capacity of each abutting point; a graph theory shortest path algorithm is utilized to optimize a load transmission path and form a fluctuation evaluation vector, a prestressed reinforcement tension stability control matrix is constructed to realize symmetrical batch tension, and support system parameters and a tension program are adjusted in real time through a load transmission dynamic balance equation set. And a load transmission effect evaluation vector is established to perform continuity and controllability evaluation on an overall transmission path, and when the transmission efficiency is lower than a set value, the load distribution and path optimization program is executed again, so that the technical problem of instability of a support system caused by uncontrollability of the load transmission path in the construction process of the special-shaped beam curved template is solved.

The invention discloses a trough beam structure capable of separating pedestrians from vehicles, belongs to the field of bridge engineering, and solves the problems that the clearance below a bridge is difficult to meet the flood discharge requirement after the bridge is level-crossed with a dike, the noise and tail gas pollution of a motor vehicle lane is serious, and the pedestrian experience feeling is poor. A groove-shaped beam is of a groove-shaped structure formed by a bottom plate and web plates on the two sides of the bottom plate, cantilever plates are arranged on the two sides of the groove-shaped beam respectively, and bridge railings are arranged on the outer sides of the cantilever plates; the bottom plate is used for arranging a motorway, and the cantilever plate is used for arranging a sidewalk. By adopting the through channel beam structure and the cantilever slab overhanging structure, the height of the bridge building is effectively reduced, navigation and flood discharge clearance under the bridge are ensured, and roads on two banks do not need to be lifted; the webs on the two sides of the channel beam are used for conducting hard isolation on the sidewalk and the motorway, separation of people and vehicles is achieved, intersection possibly existing between a slow pedestrian space and the motorway is avoided, potential safety hazards are reduced, and noise and tail gas are isolated.

The utility model provides a device for correcting roundness deviation of a steel pipe, which comprises an inner frame, a plurality of supporting rods and a plurality of pipe expanding frames, the inner frame, the supporting rods and the pipe expanding frames are sequentially connected from inside to outside, each pipe expanding frame comprises an inner sleeve rod and an arc-shaped beam, one end of each inner sleeve rod is telescopically connected with the corresponding supporting rod, the other end of each inner sleeve rod is connected with the corresponding arc-shaped beam, and each arc-shaped beam is connected with the corresponding supporting rod. And the outer edges of the plurality of arc-shaped beams belong to the same circle. The steel pipe coiling device is reasonable in structural design form, and can adapt to coiled steel pipes with different diameters by selecting and matching the inner frames with different sizes and adjusting the stretching and retracting of the inner sleeve rods.