142results about How to "Small structural deformation" patented technology

The invention discloses a hybrid welding method and hybrid welding equipment for laser electromagnetic pulse. The method can be used for laser seam welding and laser spot welding technology, a pulsed high magnetic field is applied to a welding region during the process of laser welding on a workpiece with the effect of laser beams so as to mutually react with an induced plasma, a welding pool and a stress strain field through welding and complete welding task. The equipment comprises a laser device, an electromagnetic pulse generator, a numerical control system, an optical transmission system and a laser electromagnetic pulse combined machining head. The combined machining head is used for integrating the laser beams with the pulsed high magnetic field and adjusting the distance between an electromagnetic conversion device and the workpiece; the combined machining head is arranged on a machine tool. The structural deformation can be reduced, the welding quality and machining efficiency are improved, and insurmountable technical problems when a metallic material structure is manufactured through existing single welding technology are solved.

The invention discloses a method for molding a phenolic panel honeycomb sandwich structural member and belongs to the technical field of composite material molding. The phenolic panel honeycomb sandwich structural member comprises inner covering skin, outer covering skin, a frame, a honeycomb, a reinforcing fiber prepreg tape reinforcing layer, an inner glue film layer and an outer glue film layer. The method comprises preparing a phenolic resin prepreg cloth, preparing a mold having the honeycomb sandwich structure shape, pre-curing the inner covering skin and the frame, paving a reinforcing fiber prepreg tape through bonding the reinforcing fiber prepreg tape to the surface of the pre-molded inner covering skin to obtain the reinforcing fiber prepreg tape reinforcing layer, carrying out honeycomb installation and pre-curing, pre-curing the outer covering skin, assembling a product through paving the outer covering skin layer, integrally curing the assembled product and carrying out demolding. The method can mold a large-size honeycomb sandwich structure. The molded honeycomb sandwich structure does not deform, lose viscidity and produce bulge, has the size, weight and shape satisfying design requirements and has good ablation resistance.

The invention provides a capacitance micro-machining ultrasonic sensor for measuring density and a production method thereof. The capacitance micro-machining ultrasonic sensor comprises a monocrystalline silicon substrate, a cavity formed by corrosion arranged on the monocrystalline silicon substrate, a first silica thin layer arranged on the upper end surface of the monocrystalline silicon substrate and sealing the cavity, a metal electrode layer formed by sputtering on the silica thin layer, and a silicon nitride thin layer and a second silica thin layer formed by successively etching on the metal electrode layer. The sensor disclosed herein has the characteristics of insulation, corrosion resistance and high temperature resistance, and can guarantee the reliability of CMUT in different measurement environments and the measurement precision.

The invention discloses a manufacture method of a Z-shaped steel sheet pile through continuous cold roll forming by continuously rolling and forming with a cold bending unit and distributing preliminary shafts at both sides of a central shaft. Web plates are continuous so as to greatly improve the modulus and the flexible rigidity of a cross section and fully exert the mechanical characteristic of the cross section. The manufacture process takes great effects in aspects, such as controlling the quality of the cold-bent Z-shaped steel sheet pile, improving the matched accuracy and the connection strength of the preliminary shafts of the steel sheet pile, and the like. The invention controls the product size and overcomes the defects generated in the processing process by performing the preliminary shafts of the cold-bent Z-shaped steel sheet pile and wholly forming the Z-shaped steel sheet pile.

The invention provides railway structure concrete protecting coating and a preparation method and a using method thereof. The protecting coating comprises a sealing primer layer, a polyurethane middlepaint layer and a fluorocarbon finish paint layer. The protecting coating has excellent adhesion; when the protecting coating is used for protecting a railway concrete bridge, the protecting coatingcan avoid occurrence of a situation that the railway concrete bridge cracks first and then is repaired in a special environmental region, significantly improves the durability of the railway concretebridge, prolongs the service life the railway concrete bridge, can achieve an excellent concrete protecting effect in the case of relatively thin concrete bridge coating thickness, and is convenient and fast to use; the protecting coating can also be used for protecting the surface of a ballastless track structure, and when the protecting coating is applied to the surface of a concrete track plateunder a steel rail or the surface of a ballast bed plate, the temperature difference between day and night due to sunlight irradiation can be reduced, the warpage amount of the track plate can be reduced, the open joints of plate corners or upwarp of the ballast bed plate or other damages can be reduced or even eliminated, and the effect of improving the durability of a ballastless track high-speed railway with a strict requirement on the smoothness is relatively good.

The invention discloses a gravity balance device and a method of a flexible coordinate measuring machine based on magnetic rheologic fluid. An outer case of a magnetic rheologic fluid variable damping clutch mechanism is connected with an outer case installing shaft of the magnetic rheologic fluid variable damping clutch mechanism, an inner case is fixedly connected with the end surface of a lower shaft sleeve, a permanent magnet and a damping disc are arranged in the inner case, the outer cylindrical surface of the permanent magnet is provided with an electromagnet, the output current of an electromagnetic coil is calculated and changed according to the pose dynamic state of the measuring machine for changing the size of an output electromagnetic filed, the iron and the permanent magnet are in combined use, the damping moment is dynamically changed, and the self-adapting dynamic regulation of the balance moment of the operation pose can be realized, so the mechanism has the advantages of reliable work and energy source saving. Through the tooth-shaped design on the friction surface of the damping disc in the magnetic rheologic fluid variable damping clutch mechanism, the invention improves the friction force between the magnetic rheologic fluid and the damping disc, and effectively prevents the slippage. The mechanism reduces the structural deformation caused by self gravity of the measuring machine, reduces the measuring intensity of measurers, and has the advantages of convenient loading and unloading, simple structure and beautiful appearance.

The invention provides a viscoelastic friction type energy dissipation self-resetting buckling-restrained brace. The viscoelastic friction type energy dissipation self-resetting buckling-restrained brace comprises an upper fixing cylinder, a lower fixing cylinder, fixing guide plates, a piston rod, a fixing end plate, springs, a first viscoelastic energy dissipation assembly, a second viscoelasticenergy dissipation assembly, first friction structures and second friction structures. Both ends of the fixing guide plates are separately inserted and fixed into the upper fixing cylinder and the lower fixing cylinder. The piston rod is arranged between the interior of the upper fixing cylinder and the interior of the lower fixing cylinder. The first viscoelastic energy dissipation assembly andthe second viscoelastic energy dissipation assembly separately sleeve both ends of the piston rod. The springs are arranged between the first viscoelastic energy dissipation assembly and the second viscoelastic energy dissipation assembly. The first end of the piston rod limits the first viscoelastic energy dissipation assembly, and the fixing end plate limits the second viscoelastic energy dissipation assembly. The viscoelastic friction type energy dissipation self-resetting buckling-restrained brace has self-resetting capability, can be automatically adjusted according to the brace force deformation characteristics to prevent damage to the internal components of the brace, and has stable and efficient energy dissipation capability.

The invention relates to an insertion combination type recyclable expanding body anchor rod of a high-bearing inner cabin and a construction method and belongs to the technical field of civil engineering. An unbonded steel strand is rewound through a smooth arc-shaped top bearing anchor end to form a double number of steel strands, and after forming through a specially-made steel strand locking device, the steel strands, a locking body and a binding lacing strip are commonly locked to form an insertion locking assembly, and the assembly is connected with a cabin type assembly composed of a bottom fixed pedestal and the like and is fastened through a locking screw and a nut. After the insertion combination type recyclable expanding body anchor rod of the high-bearing inner cabin is sent into a stratum, the high-pressure grouting cabin is unfolded in an expanded mode, a large-diameter high-strength anchor body is formed, and after a supporting function with high anchoring safety is finished, the unbonded steel strand can be recycled efficiently and rapidly and is simple to construct and simple in structure.

The invention discloses a design and construction method for adjacent new construction or simultaneous construction of a bridge and a subway tunnel. When the clear distance between the line positionsof the left subway tunnel and the right subway tunnel is 8.6-13.5 m, a bidirectional framing type section bridge or a bidirectional whole-width type section bridge is adopted as the bridge. One one-way single-width bridge or the two-way whole-width section bridge in the two-way framing type section bridge spans one subway tunnel through a transverse single-span frame beam. The structural center line of the one-way single-width bridge or the two-way whole-width type section bridge is aligned with the structural center line of the crossed subway tunnel, the other subway tunnel crosses underground from the side of the bridge, and the minimum horizontal safe clear distance between the crossed subway tunnel and the adjacent bridge pile foundation is controlled to be 2-4 m. The bridge and the subway tunnel span each other (cross) in the space, it is guaranteed that the spatial distance between the bridge and the subway tunnel reaches the minimum when the bridge and the subway tunnel span each other or cross each other, and mutual safety of structural bodies of the bridge and the subway tunnel is guaranteed through various comprehensive measure methods.

The invention relates to a climbing frame adopting a rotary wheel centrifugal triggering type falling protector. The climbing frame adopting the rotary wheel centrifugal triggering type falling protector comprises scaffold floors, a connection plate, an overturning plate, a stand rod, a protective net frame, a connection component, a power system, a guide rail and a plurality of guide seats, wherein the guide rail and the guide seats are connected in sliding and sleeving manners. The guide rail is a T-shaped guide rail. Each guide seat comprises a rotating wheel and an anti-falling swinging pin, wherein the rotating wheel is connected with the anti-falling swinging pin through a centrifugal triggering structure, when the guide rail rapidly falls, the rotating wheel drives the anti-fallingswinging pin to abut against the guide rail and brake the guide rail through the centrifugal triggering structure. By arranging the T-shaped guide rail, the locating interval is small, machining is easy, structure deformation is little, and the T-shaped guide rail is in closer fit with the guide seats. The top of each guide seat is provided with the rotating wheel, the anti-falling swinging pin and the centrifugal triggering structure, when the guide rail falls out of power control, the rotating wheel drives the anti-falling swinging pin to conduct linkage to clamp the guide rail through the centrifugal triggering structure, and the guide rail is prevented from falling; and in this way, automatic braking is conducted, and safety accidents are avoided.

This invention relates to a matrix type pushing installation method of big span, big depth space steel structure. Its feature is that flat pack moulding bed and stand pack moulding bed are set on one span end at space steel structure installation position; slideway is set at column position of space steel structure. Chief frame is tinetoyed on flat pack noulding bed, chief frame and column is installed by the chief frame is hooked to stand pack moulding bed, then the chief frame and column is pushed translating one column distant along the slideway by pushing equipment. Next frame and column is tinetoyed at span end position, and then secong frame and purlin between two pins are installed. The two pins chief frame and column is pushed translating one column distant along the slideway by pushing equipment. Then above process is repeated until tinetoy is over, finally the whole steel structure is pushed in place along slideway and corrected and fixed. The advantage of this invention is that when construction site and equipment is restricted, structure vibration and deformation can be avoided, cumulative translation matrix form pushing method is used to install big span big depth space steel structure.

The invention discloses a passenger plane with a joined-wing configuration. The passenger plane comprises a fuselage, a first front wing, a second front wing, a first rear wing, a second rear wing, a first end plate, a second end plate, a vertical fin and at least one engine, wherein the roots of the first front wing and the second front wing are respectively and fixedly connected with the two sides of the fuselage; the root of the vertical fin is fixedly connected with the rear section of the fuselage; the roots of the first rear wing and the second rear wing are respectively and fixedly connected with the vertical fin; the upper end of the first end plate is connected with the tail of the first rear wing, and the lower end of the first end plate is connected with the tail of the first front wing; the upper end of the second end plate is connected with the tail of the second rear wing, and the lower end of the second end plate is connected with the tail of the second front wing; the engine is arranged at the rear section of the fuselage. The aerodynamic characteristics of the passenger plane are superior to those of the passenger plane with the traditional layout, the passenger plane has higher longitudinal static stability, the structural deformation of the passenger plane is smaller than that of a plane with a single wing, and the structural natural frequency of the passenger plane is higher than that of the plane with the single wing.

The invention provides a concrete shear wall with a lead core energy-consuming device and a built-in steel plate and a manufacturing method, and belongs to the field of earthquake resistance and disaster prevention and reduction of engineering structures. Connection plates with bolt holes are welded to the middle of the inner side of a structural steel frame, and studs are welded to the two sides of the steel plate with round holes distributed in a diagonal mode. The steel plate is connected with the connection plates with the bolt holes in a splicing and fastening mode through high-strength bolts, cake-shaped lead blocks with round holes are embedded in the round holes distributed in the diagonal mode, tie bars penetrate through the cake-shaped lead blocks with the round holes to be bound with reinforcing mats, and concrete is poured in the two sides of the steel plate with the round holes distributed in the diagonal mode to form the concrete shear wall. Under the action of earthquakes with common intensity, the steel plate shear wall provides sufficient rigidity for a structure; the tie bars and the lead blocks extrude to dissipate part of earthquake energy, and house structures can be normally used; under the action of earthquakes with rare earthquake intensity, the tie bars and the studs are effectively bound with a reinforced concrete wall, the steel plate is prevented from buckling outside a plane, and the structural earthquake resistance is enhanced.

The invention discloses a construction method for an opening of a contact channel of an existing shield tunnel, which comprises the following steps of: firstly, supporting and reinforcing duct pieces which do not occupy a road in an opening area and an influence range by adopting a duct piece supporting and reinforcing device; then a three-pilot-hole three-step construction method is adopted for duct piece opening construction, specifically, a middle pilot hole is excavated firstly, and a middle pilot hole connector ring beam, a stand column and a temporary steel support are constructed; a left pilot tunnel is constructed, and the left side ring beam is closed; finally, a right pilot tunnel is constructed, the right side ring beam is closed, and at the moment, totally-closed construction of the opening area ring beam is completed; and dismantling the temporary support after the ring beam is closed and reaches the design strength. According to the method, construction treatment of the existing shield tunnel evacuation channel and the entrance and exit duct piece opening can be safely and rapidly completed, the construction progress is fast, structural deformation is small, the safety quality is guaranteed, the treatment period is effectively shortened, it is ensured that a set target of a construction unit is smoothly achieved, and social benefits and economic benefits are remarkable.

The invention discloses a cable net structure-based expandable conical spiral array antenna. The cable net structure-based expandable conical spiral array antenna comprises conical spiral antennas, an upper net surface, a lower net surface and expandable peripheral trusses, wherein the conical spiral antennas are distributed in an array way, the upper net surface and the lower net surface are connected with the conical spiral antennas, the expandable peripheral trusses are connected with the upper net surface and the lower net surface, the conical spiral antennas are connected onto the upper net surface and the lower net surface by longitudinal cable segments, and the expandable peripheral trusses are arranged at the peripheries of the conical spiral antennas distributed in the array way. By the antenna, the total mass of the array conical spiral antenna is greatly reduced, and the antenna is small in processing difficulty, and is simple to assemble and is more convenient to transport; the tension force of a cable of the array conical spiral antenna is uniform, the antenna array structure is more stable, and the shaping accuracy of the array conical spiral antenna is greatly improved; and the antenna can be folded and expanded, the storage space is greatly saved, the structural deformation caused by transportation vibration is reduced, and the accuracy is improved.

The invention discloses a novel deck type arch bridge. The novel deck type arch bridge is mainly composed of an arch rib, a main girder, rigid oblique rods, upright columns and bridge piers, wherein the upright columns are arranged between the arch rib and the main girder; a plurality of V-shaped structural parts are also arranged between the arch rib and the main girder, and the V-shaped structural parts are continuously and symmetrically arranged from the midspan position to two sides; and each V-shaped structural part is mainly composed of two rigid oblique rods, and the value of a bottom included angle theta ranges from 40 degrees to 120 degrees. The V-shaped structural parts and the main girder or the arch rib form a triangular structure, and the main girder and the arch rib are constrained by the angular points of the triangular structure to ensure that constrained points fall at the maximum displacement position and the midspan position of the displacement envelope diagram of the arch rib or the main girder of the original structure, thereby enhancing the weak positions of the arch rib and the main girder and also improving the linear rigidity; and furthermore, bending and shear deformation of the structure can also be reduced by continuous arrangement of the V-shaped structural parts. The novel deck type arch bridge can also reduce the rise-to-span ratio and eliminate the 'seesaw' effect of the arch bridge when subjected to the half-span load and is especially suitable for high-speed railway bridges.

The invention relates to a high-speed heavy-duty large-span gantry manipulator truss guiding drive device and its application, including a guiding drive base, a motor driving mechanism, a transmission mechanism, a bearing mechanism and an elastic guiding mechanism. The bearing mechanism and the elastic guiding mechanism are arranged on The two opposite sides in the guide drive base, the motor drive mechanism is arranged on the outer side of the guide drive base and transmits motion through the transmission mechanism. Utilizing the gantry manipulator truss guiding drive device of the present invention can reduce the deformation of the overall structure during the movement of the gantry manipulator truss, improve the stability of the gantry manipulator truss when it moves at high speed and with a large load, and also improve the stability of the gantry manipulator truss during operation. Safety improves work efficiency and reduces labor costs, and the gantry manipulator truss guide drive device of the present invention has reasonable structural design, low cost, convenient installation and use, and has good economic benefits and market value.