916 results about "Structural integrity" patented technology

The present subject matter discloses an improved wall structure for a modular plastic shed, designed for easy on-site assembly using pre-constructed modular panels. The enhanced wall structure features T-shaped connection accessories that securely install the wall to the floor panels. Additionally, support columns with integrated reinforcement ribs are incorporated to further strengthen the overall structure. These support columns also feature pre-formed sockets, allowing for quick and straightforward attachment of the wall panels, simplifying the assembly process and improving structural integrity.

The invention relates to the technical field of cable aging diagnosis, in particular to a cable aging diagnosis monitoring method and system. The method comprises the following steps: acquiring cable operation log data and cable internal structure design data, extracting a cable structure distribution condition in combination with an operation log, and evaluating cable operation state data; electric power sudden demand characteristics are identified, and then a non-uniform thermal coupling unbalance state is determined; based on the thermal coupling unbalance and the operation state data, detecting the coupling failure condition of the cable multilayer structure, and further judging the structural integrity damage condition; deducing a load stability disintegration situation according to a structure damage and insulation strength reduction trend; further detecting the decline of the quality of transmitted electric energy, analyzing the increase degree of abnormal voltage fluctuation, and identifying the fatigue trend of the metal material of the cable; through the above cable aging diagnosis, the cable aging diagnosis data is output. According to the cable aging diagnosis method and device, cable aging diagnosis is diagnosed, so that cable aging diagnosis is more accurate and efficient.

The invention relates to the technical field of pipeline detection, and particularly discloses a corrosion analysis method and device for gas pipeline integrity management and a medium. The method comprises the following steps: determining a key corrosion risk position; acquiring pipeline state data of the key corrosion risk position; analyzing the pipeline state data based on a preset corrosion prediction model to generate a corrosion degree; determining the residual strength of the key corrosion risk position based on the corrosion degree and the pipeline attribute data; and evaluating the structural integrity of the key corrosion risk position based on the residual strength, and generating a corrosion analysis result. Through corrosion degree analysis and structural integrity analysis of a key corrosion risk position, fundamental conversion from static general detection to dynamic fine detection is realized, a real high-risk position in a current state can be actively identified, the number of unnecessary excavation verification times is greatly reduced, and the construction efficiency is improved. And the maintenance cost is obviously saved, and secondary damage to the pipeline due to excessive detection is avoided.

The invention belongs to the technical field of mechanical property testing, and particularly discloses and provides a coal rock sample mechanical property intelligent testing system and method.The coal rock sample mechanical property intelligent testing system comprises a consistency verification module, a test piece dividing module, a density testing module, a triaxial testing module and a report generating module; standardized screening is carried out on the size, morphology and structural integrity of the test piece, physical characteristics are ensured to be unified, individual difference interference is avoided, then density and triaxial testing are integrated, density, triaxial compressive strength and shear strength parameters are synchronously obtained, a multi-dimensional data system is constructed, the problem that in the prior art, parameters are single is solved, and the test efficiency is improved. The method comprehensively supports comprehensive evaluation of coal rock mechanical properties, and meanwhile, by outputting a structured report containing a measured value, an adaptive threshold value, a judgment result and an unqualified item and clearly marking the unqualified item, the limitation that manual secondary processing is needed in the prior art is solved, seamless connection of testing, evaluation and engineering application is achieved, and the engineering application value is improved.

The invention discloses a vacuum brazing quality detection method for a heat dissipation structure and related equipment, and the method comprises the steps: obtaining heat flux density distribution data of the heat dissipation structure, and dividing the heat dissipation structure into different functional regions according to a thermal efficiency index; differential thermal pulses are applied to the heat dissipation structure in the vacuum brazing process, and thermal pulse response data and technological process monitoring data are obtained; calculating a thermal response characteristic parameter, comparing the thermal response characteristic parameter with a preset parameter range, identifying an abnormal state and generating a process adjustment instruction; performing time-space synchronization processing on the thermal response characteristic parameters and technological process monitoring data, and determining defect types, positions and severity; and performing a thermal load test to obtain heat conduction characteristic data, and quantitatively evaluating the structural integrity and the heat conduction performance of the brazed joint surface. According to the method, the defects of the internal joint surface can be detected in real time in the vacuum brazing process, the heat dissipation performance is accurately evaluated, and the limitation of a traditional detection method in coping with a complex geometric structure is solved.

The invention relates to a cable bridge fault detection method and system based on deep learning, and the method comprises the following steps: carrying out the multispectral image collection of a region of a cable bridge, and obtaining a multispectral image data set; performing background modeling and noise suppression on the multispectral image data set through a multiscale Gaussian mixture model to obtain a multispectral enhanced image data set; performing cable bridge edge-gradient double-constraint segmentation on the multispectral enhanced image data set to obtain a bridge structure contour feature map; performing anomaly detection on the bridge structure contour feature map to obtain a bridge structure integrity anomaly map; and performing deformation-corrosion joint identification analysis on the cable bridge based on the bridge structural integrity anomaly graph to obtain a bridge fault type marking graph, thereby solving the technical problems of low efficiency, high cost, large subjective judgment error and difficulty in discovering a hidden fault in a traditional mode depending on manual inspection.

The invention relates to the technical field of strength detection, in particular to a tunnel freezing pipe structure integrity detection method and system.The method comprises the following steps that stress values and strain values under the differential temperature gradient and pressure distribution condition are analyzed based on the diameter, wall thickness, length and elastic data of a tunnel freezing pipe, and mechanical parameters of key nodes and connecting parts are identified; and analyzing a local stress concentration area and crack propagation, and generating stress and strain distribution prediction values. According to the method, the detection precision is improved through multi-dimensional parameter analysis and refined prediction, mechanical parameters and crack propagation areas of key parts are accurately identified, local stress concentration and potential damage are defined, efficient path planning and equipment frequency distribution are achieved by combining damage path sorting and real-time data dynamic adjustment, continuous monitoring of the key areas is ensured, and the accuracy of the detection is improved. By optimizing the damage index and evaluating the structure risk in real time, the overall state and local risk of the freezing pipe are comprehensively controlled, and the detection scientificity and reliability are improved.

The invention discloses a ship body pipe fitting welding device for ship manufacturing, relates to the technical field of welding devices, and solves the problems that the contact area of a ship body pipe fitting welding point location is small, the bearing capacity of a welding position is weak, the later repair rate is high, and the service life is short. The ship body pipe fitting welding device for ship manufacturing comprises a device rack; the pipe fitting conveying assemblies are mounted on the two sides in the device rack; and the butt welding seam structure is mounted in the center of the interior of the device rack and located between the two pipe fitting conveying assemblies. According to the method, the mode that the weld joint is reserved and the groove is ground is adopted, the edge defects of the ship body pipe fitting can be eliminated, it is ensured that the root of the weld joint is completely penetrated, and the defect risks of incomplete penetration, slag inclusion and the like are reduced. Meanwhile, the concave part of the groove is polished, so that the effective welding seam area can be increased, the bearing capacity and structural integrity of the welding position of the ship body pipe fitting are improved, and the service life of the ship body pipe fitting can be effectively prolonged.

The invention aims to provide an aircraft blade detection probe and method based on flexible double-frequency differential eddy current, and relates to the technical field of nondestructive testing, when defect detection of an aircraft blade is carried out, a flexible substrate can be adaptively attached to a complex curved surface of the blade; the double-frequency excitation coil cooperatively works through high frequency and low frequency and respectively captures surface micro-cracks and subsurface corrosion defects, and when differential signal amplitude fluctuation occurs in the differential receiving coil, it can be judged that abnormal damage exists in a corresponding blade area; if the coil induction signal is kept stable and unchanged, the corresponding area is in a normal state, and the geometric characteristics of the damaged part can be quantitatively analyzed by observing the numerical range of the amplitude change; specifically, the intensity of signals output by the induction lines and the integrity of the blade structure are in positive correlation, and the larger the fluctuation value is, the more serious the damage degree is.

The invention discloses a construction method for prefabricating and assembling a seabed energy storage tank through prestress, and belongs to the technical field of structural engineering. The energy storage tank comprises a plurality of sub-spherical shell units and prestressed reinforcements. The construction method comprises factory prefabrication and field assembly processes of the plurality of sub-spherical shell units. The sub spherical shell units are made of common concrete or ultra-high performance concrete or ultra-high toughness concrete, PVC or metal corrugated pipes used for allowing prestressed steel bars to penetrate through are pre-buried in the shell framework, and anchorage device positioning grooves are reserved in the edges of the shell framework. A plurality of sub spherical shell units are sequentially spliced on site, high-strength prestressed steel bars are arranged in a pipeline in a penetrating mode and are tensioned in a segmented mode, anchorage devices are installed at the ends of the steel bars for fixing, and an overall spherical structure is formed. And sprayed concrete materials are applied to the joints and the positioning grooves for sealing, so that a closed energy storage spherical tank structure is formed. The method is suitable for an energy storage system in a deep sea high-pressure environment, and has the characteristics of simple and convenient construction process and good structural integrity and water tightness.

The invention discloses a novel telescopic pipe structure of a high-temperature and high-pressure well and an optimal configuration method of a pipe column of the novel telescopic pipe structure, belongs to the technical field of oil and gas exploitation, and aims to solve the problem of buckling failure of the pipe column caused by piston force load of an existing telescopic pipe under high-temperature and high-pressure working conditions. The novel telescopic pipe is composed of an inner cylinder mechanism, an outer cylinder mechanism and a balance chamber mechanism. The inner cylinder mechanism and the outer cylinder mechanism are connected through threads, and structural integrity and reliable connection are guaranteed. The balance chamber mechanism comprises inner and outer pressure cavities and a hydraulic hole which are respectively communicated with the inner and outer pressure of the oil pipe to dynamically balance the piston force. The optimized configuration of the pipe column comprises the following three steps: S1, analyzing the mechanical behavior of the telescopic pipe column to provide a mechanical basis for configuration optimization; s2, the position of the telescopic pipe is designed, the well depth range where the telescopic pipe works is determined, and the optimal position is locked through iterative calculation; and S3, designing the number of the telescopic pipes, and determining the optimal number of the telescopic pipes meeting the compensation requirement. The stability of the high-temperature and high-pressure well pipe column can be remarkably improved, and technical support is provided for safe and efficient development of ultra-deep oil and gas wells.

The invention discloses a microdefect-containing high-temperature structure damage regulation and control method based on a dual-scale modeling method and a related device, and relates to the technical field of structural integrity evaluation and optimization of high-temperature alloy materials, and the method comprises the following steps: obtaining a plurality of alloy experiment samples subjected to standard heat treatment; the method comprises the following steps: establishing a macroscopic-microscopic dual-scale model based on an alloy experimental sample; mapping the macroscopic displacement field to a microscopic model in the macroscopic-microscopic dual-scale model, calculating a local plastic slippage cumulant, and taking a cumulative plastic slippage critical value as a fatigue failure criterion; based on the local plastic slippage cumulant and the cumulative plastic slippage critical value, defect parameter sensitivity evaluation is conducted on the alloy experiment sample, and the influence of the defect shape, the defect size and the defect position on the fatigue life is obtained; and carrying out surface gradient microstructure strengthening on the high-sensitivity area, optimizing a defect form through plastic deformation and transferring a damage accumulation position. The service life of the high-temperature structural part is remarkably prolonged.

The invention relates to the technical field of engineering construction, and discloses a pipeline groove inserting plate type supporting structure and a mounting construction method.The pipeline groove inserting plate type supporting structure comprises stand columns arranged in parallel, and vertical guide sliding grooves are formed in the inner sides of the stand columns; the multiple layers of inserting plates are embedded between the two rows of stand columns through the guide sliding grooves; the supporting rods are connected with middle nodes of the two rows of stand columns, and adjustable connectors are arranged at the ends of the supporting rods; enclosing purlins are arranged on the outer sides of the tops of the stand columns and fixedly connected with the stand columns through bolts; a horizontal cross rod is arranged on the inner side of the bottom of the stand column. The guide sliding grooves of the stand columns are matched with the inserting plates, accurate positioning is achieved when the inserting plates are pressed in a layered mode, the adjacent inserting plates are arranged in a staggered joint mode, joint sealing treatment is combined, a continuous closed soil blocking barrier is formed, water and soil leakage is effectively blocked, cooperative stress of a soil body and the inserting plates is enhanced, and therefore a dynamic construction mechanism of supporting while digging is achieved; soil deformation is matched in real time, and the supporting efficiency and the structural integrity are remarkably improved.

Embodiments relate to an enhanced method for building walls by primarily reducing the time for assembly. The design is for a molded multi-segment plastic composite construction block that interlocks horizontally, vertically and orthogonally with a clearance-fit, does not require mortar for structural integrity and is self-aligning. The blocks are molded out of natural-fiber reinforced thermoplastic composites with thermal expansion coefficient less than 0.0002 per degree Celsius and compression strength greater than 60 MPa.

The invention belongs to the field of tunnel supporting, and particularly relates to a self-adaptive large-deformation 3D printing tunnel supporting structure and a dynamic adjusting method. In order to solve the problem that the damage risk of the supporting structure is increased due to large deformation in existing tunnel excavation, the supporting structure comprises a plurality of in-situ printed concrete units, grid nodes, a steel cable, a jack and a control system, and the tension of the steel cable can be adjusted through the jack according to data collected by a stress-strain sensor; the concrete arch frame deforms along with the deformation of the tunnel; according to the method, the tension of the steel cable is adjusted according to the real-time monitoring condition of the stress-strain sensor, so that the concrete arch frame is changed, self-adaptive adjustment of the concrete arch frame is achieved, stress balance of the concrete arch frame is achieved, the possibility that the concrete arch frame is damaged is reduced, and the structural integrity of the concrete arch frame is guaranteed.

The invention provides a self-adhesive pavement local disease repair blanket and a preparation process and application thereof, the repair blanket is of a rectangular sheet structure, and sequentially comprises an anti-wearing layer, a high-viscosity tough asphalt layer, a self-healing composite structure layer, an anti-crack reinforcing layer and a self-healing bonding layer from top to bottom. The self-healing composite structure layer is composed of a crack limiting induction film layer and a shape memory polyurethane strip. Through the collaborative design of introducing the anti-crack reinforcing layer and the high-viscosity and tough asphalt layer into the repairing blanket structure, the stress fluctuation transmitted by base cracks can be effectively buffered, and the stress concentration degree of the surface layer is reduced, so that the occurrence of reflection cracks is inhibited, and the structural integrity of a pavement repairing area is improved; a self-adhesive composite structure which can be used at normal temperature is adopted, traditional operation steps such as heating, mixing or sealing layer laying are not needed in the construction process, the construction process is simplified, and the maintenance time is shortened.

The utility model relates to the technical field of constructional engineering, and discloses a reinforced concrete structure impact-resistant protection device which comprises a main body, supporting columns are arranged on the two sides of the main body, a fixing plate is fixedly installed in the main body, a buffering plate is arranged on the outer wall of the main body, a bearing plate is fixedly installed at the bottom of the main body, and an adjusting frame is arranged on the inner wall of the main body. Limiting blocks are clamped in the adjusting frames, and inclined supporting rods are in threaded connection with the interiors of the limiting blocks. According to the impact-resistant protection device of the reinforced concrete structure, through cooperative arrangement of the main body, the supporting columns, the fixing plate, the buffer plate and the bearing plate, impact force and external force from different directions can be effectively resisted, it is ensured that the whole protection device is not prone to inclining or collapsing when being impacted, and the fixing plate is arranged in the main body; the shape and structural integrity of the main body can be better kept when the main body bears impact force, the main body is prevented from deforming due to external force, and therefore the reliability and durability of the whole protection device are improved.

The invention provides a phased array ultrasonic interface debonding detection method for a multilayer curved surface bonding structure, which comprises the following steps of: accurately calculating delay time of each array element in a phased array ultrasonic probe to a target focus by designing a delay block attached to a solid engine and aiming at a cylindrical special structure; therefore, in-phase superposition of sound waves at the target focus is achieved, focusing of sound beams is achieved, the problem of delay time calculation of sound waves emitted by all array elements of a phased array probe of a cylindrical structure is solved, and the problem of control over the deflection angle and the focusing depth of the sound beams synthesized after the sound waves pass through a plurality of curved surface interfaces is solved. Accurate positioning and visual representation of the debonding defect of the deep interface are realized. The technology provides a new technical means for accurately judging the interface debonding defect, and has important significance for guaranteeing the structural integrity and the use safety of the interface debonding defect.

The invention discloses a three-stand-column prestress hollow interlayer steel pipe concrete lattice type wind power tower system which comprises a three-stand-column lattice tower, a switching section, a steel tower section, a cabin, a hub and a wind wheel. The three-stand-column lattice tower is connected with the steel tower section through the switching section and used for achieving load transmission between the steel tower section and the three-stand-column lattice tower; the structural integrity and stress balance of the whole tower system are guaranteed, the cabin and the wind wheel are installed through a hub, and the cabin is located at the upper end of the steel tower section. A hydraulic-spring composite driving system (oil pushes a piston plate and springs rebound) is adopted, so that the bidirectional telescopic buckle achieves the automatic locking function, a traditional bolt connection mode is completely changed, the tower section splicing efficiency is improved by 300% or above through the standardized assembly process of staggered placement, buckle pre-fixing and hydraulic locking, and the tower section splicing quality is improved. The installation time of a single node is shortened to 5 minutes from traditional 15 minutes.

The invention belongs to the technical field of aircraft structure design, and discloses a fuselage frame preparation process and a fuselage frame. According to the fuselage frame preparation process, preparation of the first woven preformed body and the second woven preformed body is achieved through the weaving operation of the weaving machine, the preparation efficiency and the structural integrity of the first woven preformed body and the second woven preformed body are improved, and the influence of manual operation on the fuselage frame forming quality is avoided. The preparation of the first weaving body and the second weaving body is realized by cutting operation of cutting guide parts arranged on the first weaving auxiliary core mold and the second weaving auxiliary core mold in advance, so that the preparation precision is guaranteed, and the forming quality of the fuselage frame is improved. The invention further provides the machine body frame, the machine body frame is prepared through the machine body frame preparation technology, the manual operation participation degree is reduced in the machine body frame preparation process, the influence of manual operation errors on the forming quality of the machine body frame is avoided, the forming quality and forming efficiency of the machine body frame are improved, and the manual labor intensity is relieved.

The invention relates to the technical field of shield tunnel reinforcement, and particularly discloses a foundation correction unit and a monitoring correction device for shield tunnel segments. The basic correction unit is composed of a duct piece support and a sliding rail base and is fixed to the surface of a duct piece in a lossless mode through a vacuum suction cup. The monitoring and correcting device is formed by connecting a plurality of annular correcting units and / or longitudinal correcting units, and the annular / longitudinal correcting units are formed by connecting basic correcting units and bidirectional force application rods and are integrated with monitoring sensors. The monitoring and correcting device is also provided with an automatic control system which comprises a data acquisition module and a servo module, the data acquisition module acquires monitoring data of the displacement sensor, the angle sensor and the vacuum gauge in real time, the servo module resolves the monitoring data in real time and generates a control instruction, and the suction force of the suction cup and the tension and compression load of the hydraulic oil cylinder are dynamically adjusted. And active correction of duct piece deformation and structural stability control are achieved. The tunnel deformation development can be effectively inhibited while the structural integrity of the duct piece is guaranteed.

This invention discloses a laser welding clamping device, relating to the field of welding clamping technology. It includes a cover plate, a double-free intermediate fixing member, an elastic telescopic block, a push rod, a telescopic block, and a rack. The cover plate is slidably mounted on the top of the frame. The fixed end of the double-free intermediate fixing member is fixedly mounted on the top of the cover plate. The elastic telescopic block is fixedly mounted on the free end of the double-free intermediate fixing member. The push rod is rotatably mounted on the end of a rotating plate near the elastic telescopic block. The fixed end of the telescopic block is fixedly mounted on the top of the welding device. When the elastic telescopic plate moves, it squeezes the internal welding parts. When clamping thinner workpieces, the elastic telescopic plate can absorb part of the clamping force through its own elastic deformation, preventing deformation, indentation, or damage to the thin workpiece due to excessive driving force of the telescopic device, thus ensuring the structural integrity of the thin workpiece during clamping.

The invention discloses a shield disintegration section waterproof structure for a tunnel and a construction method. The shield disintegration section waterproof structure comprises a shield abandoned shell, a steel pipe piece and a supporting part, and the shield abandoned shell is fixedly connected with a rock-soil body of an external tunnel; the steel pipe piece is arranged in the shield abandoned shell in a sleeved mode, and the supporting part is arranged on one side of the shield disintegration section and used for reinforcing and protecting the shield disintegration section. The steel pipe piece is adopted as the last ring segment lining constructed before shield disassembly, the shield shell and the steel pipe piece are welded and connected into a whole through the connecting steel ring after the shield reaches the disassembly position, the waterproof structure is simple, the waterproof capacity is high, the structural integrity is good, the shield tail can be rapidly sealed, and the construction cost is reduced. A large amount of grouting plugging, component connection and other work can be effectively omitted, the operation process is greatly simplified, and the construction cost is greatly reduced while the long-term waterproof capacity is effectively guaranteed.

The invention provides a construction method for a viaduct in a narrow space. The construction method for the viaduct in the narrow space comprises the following steps that 1, a pile foundation platform is constructed; 2, constructing a cast-in-place bent cap; step 3, mounting a portal structure; step 4, component acceptance and transportation; 5, on-site assembling is conducted; step 6, mounting a temporary bracket; step 7, trial hoisting; 8, mounting the box girder; ninthly, the support is detached; the portal structure is slidably mounted on the rail distribution beam arranged on the non-motorized vehicle lane, the temporary support foundation is arranged on the traffic lane, so that the temporary support disperses load through the column bottom distribution beam, and the top is provided with the adjusting steel pipe to finely adjust the elevation of the box beam. The box girders are spliced in sections, the weight of the portal structure hoisted at a time can be reduced through sectional welding forming of the connecting cross beams, the portal structure adapts to small-space operation, and accumulative errors are reduced through sectional welding; a clearance is reserved during disassembly, collision between the box girder and the support is avoided, the disassembly process is controllable, and the integrity of a main body structure is protected.

The invention belongs to the field of aero-engines, relates to a wheel disc bearing capacity evaluation design technology, and provides a wheel disc bearing capacity evaluation method and system based on load characteristics, and the method comprises the steps: obtaining a first finite element result, a second finite element result and a third finite element result of a wheel disc under different conditions in a reference state; the test tensile strength of the wheel disc forge piece and the tensile strength value of each unit in the wheel disc meridian plane at the corresponding unit temperature are obtained; according to the first finite element result, the test tensile strength and the tensile strength value, the circumferential rupture rotation speed reserve of the wheel disc is obtained; obtaining the radial fracture rotation speed reserve of the wheel disc according to the second finite element result, the third finite element result and the test tensile strength; and determining the wheel disc fracture rotation speed according to the circumferential fracture rotation speed reserve and the radial fracture rotation speed reserve. The method is simple and high in operability, the rupture mode of the rotor can be accurately recognized, and a reasonable load is provided for verifying the structural integrity of the rotor.

A system to monitor integrity of structures and / or other structures by monitoring vibrations.

The utility model relates to the technical field of cold storage sandwich panels, and discloses a heat preservation and insulation cold storage sandwich panel which solves the problems that an existing cold storage sandwich panel is poor in buffering and anti-collision effect, the appearance and structural integrity of the cold storage sandwich panel are prone to being affected when the cold storage sandwich panel is impacted, and the heat preservation effect is prone to being affected. A heat preservation and insulation cold storage sandwich panel comprises a sandwich panel body, a base material layer, a heat preservation layer, a waterproof layer, a heat insulation layer, a fireproof layer, a protection layer and a buffering anti-collision layer, a buffering cushion provides a flexible protection structure, deformation is conveniently generated when the sandwich panel is impacted by external force, and therefore impact energy is absorbed and dispersed, impact force is reduced, and the service life of the sandwich panel is prolonged. The buffering effect can be further enhanced through the buffering cavities and the filler, more impact energy is absorbed through compression deformation of the filler, the direct effect of external force on the sandwich board body is reduced, meanwhile, air in the buffering cavities can be conveniently exhausted through the vent holes, pressure can be quickly released, and impact force can be relieved.

The invention discloses a thermal mechanical fatigue crack growth rate testing method based on rigidity and a crack tip strain field. The method comprises the following steps: firstly, establishing a relation function between normalized crack length and normalized rigidity through finite element calculation; secondly, performing DIC speckle preparation for observing crack propagation and analyzing a strain field; then carrying out a thermal mechanical fatigue test, calculating the crack length based on a rigidity change result of the test, drawing an a-N relation curve in combination with a DIC synchronous observation result, and carrying out comparative analysis; and finally, calculating the crack growth rate through a three-point moving average secant method, and analyzing and determining the size of a crack tip plastic zone according to a DIC strain field, so as to accurately test the crack growth rate. The fatigue crack growth behavior under the thermal-mechanical coupling effect can be effectively tested, the thermal mechanical fatigue crack growth rate is accurately obtained by combining a crack tip strain field measurement method, and test data support is provided for damage tolerance design and structural integrity evaluation of high-temperature pressure-bearing equipment.

The invention discloses a deformation control method for a sliding construction structure of a large-span space truss roof, and belongs to the technical field of constructional engineering. The method comprises the following steps that a roof truss is divided into a plurality of sliding units based on a segmented assembly technology; a synchronous control system is arranged on the sliding track, and accurate in-place of the truss units is achieved through alternate sliding of the multiple sets of sliding supports; a staged prestress tensioning technology is adopted, and dynamic feedback adjustment is conducted on displacement, stress and stability in combination with a real-time monitoring system; and through the segmented glue injection technology and the embedded steel bar joint connecting technology, the close attaching performance and the structural integrity of wood arched beam connectors are ensured. Through high-precision synchronous sliding, multi-stage prestress control and a real-time monitoring and early warning mechanism, the problem of structural deformation in large-span truss roof construction is effectively solved, and the construction efficiency and safety are remarkably improved.

In order to solve the problems existing in the prior art, the laser jig frame rack slag cutting cleaning device and method are provided, the laser jig frame rack slag cutting cleaning device comprises a fixed slag cutting wheel and a movable slag cutting wheel, the two sides of a rack are synchronously and symmetrically cleaned through the fixed slag cutting wheel and the movable slag cutting wheel, so that cutting force borne by the rack in the slag cutting process is balanced, and the service life of the rack is prolonged. And plastic deformation such as distortion and bending caused by single-side or single-point force application is effectively avoided, and the geometric shape precision and the structural integrity of the rack are ensured. Meanwhile, the bearing is pushed through the electric cylinder, so that the rotating piece and the connecting ring are synchronously pushed, the movable slag cutting wheel moves in the axial direction of the rack along the rotating shaft, when the movable slag cutting wheel abuts against the rack, pushing motion of the push rod is stopped, the push rod is locked, the position of the movable slag cutting wheel is maintained, and clamping of the rack is achieved; therefore, stable clamping and efficient cleaning of the racks of different thickness specifications are achieved.