855 results about "Vertical load" patented technology

To ensure the rigidity of a floor panel against a load in a vertical direction in an electric vehicle having a step in the floor panel.SOLUTION: A rear floor panel 10 of an electric vehicle has an inclined part 16 that extends while inclining upward as it heads for backward from a rear end of a plane part 12. A floor cross member 20 is disposed in a front part of the inclined part 16 on the side of an upper surface of the rear floor panel 10. An under-floor reinforcement 30 is disposed in the front part of the inclined part 16 on the side of a lower surface of the rear floor panel 10. A front end of the under-floor reinforcement 30 is disposed ahead of the front end of the inclined part 16, and a rear end of the under-floor reinforcement 30 is disposed on the inclined part 16. The under-floor reinforcement 30 and the floor cross member 20 are joined with the rear floor panel 10 therebetween.SELECTED DRAWING: Figure 6

A borehole wall spin-shearing device includes a load applying assembly, a soil shearing assembly, and a data acquisition assembly, where the load applying assembly is configured to apply a vertical load and an axial rotational load to the soil shearing assembly; the soil shearing assembly includes a plurality of shear plates; the plurality of shear plates are configured to penetrate into undisturbed soil after being ejected due to the vertical load and then shear the undisturbed soil due to the axial rotational load; and the data acquisition assembly is configured to acquire torque values of the plurality of shear plates during a process of shearing the undisturbed soil. The borehole wall spin-shearing device can directly conduct an in-situ borehole shear test in an exploration borehole with a conventional diameter in China, reducing the cost of drilling. The borehole wall spin-shearing device achieves a high degree of automation throughout the test.

The invention discloses a mechanical property testing method for an inflatable wing, and belongs to the technical field of aerospace testing. The method comprises the following steps: S1, wing installation: clamping an inflatable wing on a test board, and enabling a chord plane of the inflatable wing to be perpendicular to a loading direction; s2, applying a load: driving a loading mechanism to apply a vertical load to the inflatable wing through an external universal tester; s3, data acquisition: synchronously acquiring a deflection curve and stress distribution data by using a displacement measurement unit and a strain detection unit; and S4, failure judgment: when monitoring that the shape of the deflection curve suddenly changes or the strain data exceeds a threshold value, judging that the inflatable wing is subjected to buckling failure, stopping loading and recording the maximum load. The test bench serves as an expansion platform of a universal tester, can be adapted to a large-size inflatable wing, does not need special equipment, reduces the cost, realizes cooperative monitoring of displacement and strain data, realizes closed-loop control of inflation air pressure-deformation-load, and remarkably improves the test precision and the data reliability.

Disclosed herein are an adhesion coefficient determination method and apparatus, and a vehicle, a medium and a program product. The method comprises: acquiring sensor data collected by at least one sensor of a vehicle; on the basis of the sensor data, determining travelling information of the vehicle, wherein the travelling information comprises at least one of the following: a slip rate, longitudinal stiffness, a tire longitudinal force, a tire lateral force, a tire vertical load, a front-axle lateral force and a rack force; on the basis of the travelling information, or the sensor data and the travelling information, determining at least one reference adhesion coefficient and a confidence level of each reference adhesion coefficient, wherein the at least one reference adhesion coefficient comprises at least one of the following: a steady-state adhesion coefficient, a dynamic adhesion coefficient, a longitudinal adhesion coefficient and a lateral adhesion coefficient; and on the basis of the at least one reference adhesion coefficient and the confidence level of each reference adhesion coefficient, determining a target adhesion coefficient of the vehicle and a confidence level of the target adhesion coefficient. The method in the embodiments of the present application improves the accuracy of adhesion coefficient determination.

The invention discloses a pressure relief and shock absorption method for a deep high-stress key pillar. (a) a top plate is arranged at the top of the ore pillar, four inclined kerfs are alternately arranged in a top plate area around the ore pillar, and the kerfs are symmetrically arranged in a cross shape; (b) eight anchor rod drill holes perpendicular to the top plate are formed in the interval area between the adjacent kerfs and the periphery of the ore pillar, perpendicular anchor rods are arranged in the anchor rod drill holes, and an orthogonal supporting network formed by the perpendicular anchor rods is formed; and (c) preferentially releasing the bending energy of the roof through the kerf, reducing the vertical load of the ore pillar, and meanwhile, forming a pressure arch effect by applying the prestress of the vertical anchor rod, thereby realizing space-time coupling support of the kerf and the anchor rod, and inhibiting roof separation and dynamic disturbance. The invention has the characteristics of excellent stress transfer, strong vibration suppression and excellent overall column stability.

The invention relates to the technical field of building structure reinforcement, and discloses a calculation method for increasing photovoltaic reinforcement on the roof of an existing building, which comprises the following steps of: constructing a load distribution model containing a vertical load layer (self weight of a photovoltaic module and accumulated snow load) and a horizontal load layer (wind load and earthquake load), and cooperatively transmitting the load through a node support system and an anchoring connecting piece; generating a roof reinforcement analysis model containing a supporting node model and a connecting component model; generating a reinforcement assembly sequence according to the photovoltaic system installation position distribution information and the reinforcement analysis model; generating a load distribution scheme based on the component sequence; and the distribution scheme and the reinforcement analysis model are combined, and the supporting node arrangement density and the connecting component material specification are determined through multi-objective optimization. According to the method, multi-load and structure aging are comprehensively considered, multi-target optimization is achieved, the safety and economical efficiency of the reinforcement scheme are improved, and the method is suitable for photovoltaic reinforcement calculation of the existing building roof.

The invention discloses a drive-by-wire four-wheel independent steering system and a roll risk assessment method thereof, and the method comprises the steps: building a vertical load distribution model, so as to monitor and feed back the time-varying property and nonlinear change of a vertical load in real time; establishing a real-time roll risk assessment model, designing a dynamic compensation algorithm to correct the model, and generating a roll risk prediction value sequence of a future working condition through a time sequence analysis and prediction algorithm; and establishing a roll risk early warning model, and generating different levels of safety early warning signals based on a risk level judgment mechanism. According to the invention, accurate measurement of the vertical load can be realized under the limit working condition, and real-time roll risk early warning is provided in combination with the dynamic behavior of the vehicle, so that the safety and reliability of the intelligent driving system are improved.

A utility wall is provided for a multi-story building having load bearing walls that are able to withstand vertical loads and lateral loads. The building may be a low-rise building or a mid-rise building. The utility wall, as well as the load bearing walls, floor-ceiling panels, corridor panels, and other parts of the building, are pre-manufactured off-site and then installed on-site at the site of the building. The utility walls are hung from the load bearing walls and provide utilities to the various stories of the building.

The invention discloses an eccentric quasi-static loading device for the structural rigidity of an existing brick masonry and a testing method, and relates to the technical field of quasi-static loading testing of the brick masonry, the eccentric quasi-static loading device comprises a loading pedestal, a loading assembly is arranged above the loading pedestal, a load distribution assembly is arranged above the loading assembly, and the loading assembly is connected with the loading pedestal. The reaction walls are arranged at the two ends of the load distribution assembly and the two ends of the loading assembly, the loading assembly is connected with the reaction wall on one side, the portal is arranged between the reaction walls on the two sides, and the portal is connected with the load distribution assembly. By the adoption of the existing brick masonry structure rigidity eccentric pseudo-static loading device and the testing method, the authenticity of the load condition in the simulated wall pseudo-static test process in the test is guaranteed, the vertical load loading position is adjusted and refined, the load applying mode is optimized, the loading device is adjusted, and the test efficiency is improved. The influence of a vertical load on a horizontal dynamic load is reduced, and the overall precision of the test is improved.

The utility model relates to the technical field of fabricated buildings, and discloses a beam-column connection node structure for a fabricated building, which comprises a main beam support, a main beam embedded part is fixedly welded at the bottom of the main beam support, and a lower baffle and an upper baffle are fixedly welded on the outer surface of the main beam support. Through the arrangement of the positioning assembly, after the fixing plate and the side plate are assembled together through a bolt, the side plate abuts against the abutting plate, the abutting plate can be driven to slide, the interior of the sealing groove is pressurized, the surface of the positioning block penetrates through the penetrating hole to be inserted into the positioning hole, and an extra force transmission path is added; when a building structure bears a vertical load, force can be effectively transmitted and dispersed through the positioning assembly, stress is prevented from being excessively concentrated on a bolt connecting part, the whole beam-column connecting joint can be stressed cooperatively, the deformation and damage resistance of the whole structure is improved, and a structural system of a fabricated building is more stable and reliable.

The present invention relates to a liquefied gas storage facility comprising: a load support structure having a bottom wall and a vertical load support wall, the vertical load support wall being composed of N vertical load support panels; and a can comprising a bottom wall and a vertical wall, the bottom wall comprising a plurality of angular sectors, the corrugated sealing membrane of each angular sector having a first corrugation, the corrugated sealing membrane of each angular sector comprising a plurality of metal plates arranged to form a loop portion, the loop portion comprises a set of complete metal sheets in which the total number of first corrugations present on the loop portion increases in the direction of the vertical wall, said total number increasing only per M consecutive loop portions, where M is a natural integer greater than or equal to 2.

The invention discloses a high-bearing-capacity offshore wind power pile foundation structure and a construction method thereof. The high-bearing-capacity offshore wind power pile foundation structure comprises a suction bucket, a vertical rod installed in an inner cavity of the suction bucket and coaxially fixed to the suction bucket, a stabilizing assembly dividing the inner space of the suction bucket into a plurality of independent cavities and a leveling assembly. By arranging the stabilizing assembly and the leveling assembly, the suction bucket is divided into a plurality of independent cavities through the stabilizing assembly, differential pressure leveling is conducted in a multi-cavity independent water pumping mode in the stage of preliminary contact with the seabed, the perpendicularity of the suction bucket in contact with the seabed is guaranteed, and in the stage of downward insertion of the bucket body part, a high-pressure nozzle is started again to conduct secondary posture fine adjustment; according to the dynamic deviation correcting device, the dynamic deviation correcting capacity is achieved in different time periods in the penetration process, the dynamic deviation correcting device can adapt to uneven local hardness of a seabed or slight drifting of the posture of a barrel body in the downward insertion process, inclined insertion and penetration failure caused by posture unbalance of the suction barrel are avoided, and the vertical bearing performance and the anti-overturning stability of a pile foundation are further enhanced.

The invention provides a method for determining advanced controllable roof cutting parameters of a thick and hard roof of a coal mine stope face, which comprises the steps of engineering general situation field investigation and survey, in-situ geomechanical test, goaf roof thickness / thin plate theoretical analysis, coal pillar or filling body vertical load theoretical analysis, numerical simulation calculation and engineering test verification. Analyzing the mechanical behavior of the working face roof based on a plate theory, verifying the correctness of a theoretical model through measured data, and changing boundary conditions to predict the mechanical behavior of the roof after roof cutting; the method comprises the following steps: analyzing the vertical load of a coal pillar or a roadside support body after roof cutting and the influence rule of roof cutting height and angle on the roadside support body through a mechanical model, and preliminarily obtaining better roof cutting parameters; by establishing a numerical model of different topping parameter combinations, different performance parameters are used for comparing and evaluating different topping parameters, so that the optimal topping parameter is determined; according to the method, advanced controllable roof cutting of the hard roof of the coal seam is achieved, and the mine pressure treatment effect in mining is predicted.

The invention relates to an MVMFormer-based prefabricated bridge rubber support deformation detection method and system, which are used for carrying out compression and shear performance tests on prefabricated bridge rubber supports made of different materials. Obtaining different deformation diagrams under a vertical load in the testing process, a vertical load limit diagram when deformation and damage occur, a deformation diagram in the simulation process, a limit diagram under single-side stress when deformation and damage occur, a deformation diagram in the simulation process and a transverse force limit diagram when deformation and damage occur; forming a classification data set by using the deformation graph, the corresponding experiment working condition and the non-deformation original graph, and training a classifier by using the classification data set; and identifying the experimental working condition of the image to be detected by using the classifier, and then performing segmentation. Corresponding limit diagrams and deformation diagrams under different experiment working conditions are obtained according to compression and shear performance tests, semantic segmentation is carried out on the basis, and detection and timely early warning of the phase rubber support deformation are achieved.

The invention provides a separated anti-seismic bridge abutment structure in a high-intensity earthquake area. The anti-seismic bridge abutment structure comprises a pile foundation; the platform body is mounted above the pile foundation and is connected to the lower part of the main beam through a seismic mitigation and isolation support; the box-type back wall is mounted at the rear upper part of the platform body and is not connected with the platform body; one end of the limiting pull rod is mounted on the transverse partition plate of the main beam, and the other end is mounted on the box-type back wall; the anti-lateral pile is mounted below the box type back wall; the rear portion of the box type back wall and the peripheral sides of the pile tops of the anti-lateral piles are filled with energy dissipation materials. Collision buffering materials are filled between the main beam and the box type back wall. From the perspective of'function separation to improve system reliability ', the vertical bearing function and the horizontal bearing function of a traditional seat-type bridge abutment are separated, and the horizontal bearing structure is specially designed, so that the problems of girder falling and the like caused by insufficient limiting capability of the traditional seat-type bridge abutment on a girder in the longitudinal bridge direction in an earthquake are solved, and the safety of the system is improved. And the anti-seismic requirement is fully met.

The utility model belongs to the technical field of bridge engineering, and particularly relates to a structure for widening a new bridge and an old bridge flexibly by adopting telescopic steel bars, which comprises a bridge web, a mounting groove, a fixing plate unit, the steel bars, pipe bodies and a tensile combination block unit, so that 1, a combined sleeving structure of a plurality of steel bars and a plurality of pipe bodies has enough flexible deformation capability, and the tensile combination block unit can be used for widening the new bridge and the old bridge; the new and old bridges are allowed to generate proper relative displacement in the vertical direction and the longitudinal direction; 2, the combined sleeving structure is still an integrated connecting structure, so that the vertical load can be fully transmitted, and the old bridge is further protected; 3, the new bridge and the old bridge are difficult to be far away from each other greatly in the transverse bridge direction, so that the basic function of widening connection is realized; and 4, when the fixing plate unit is installed, the new and old bridge structures do not need to be greatly changed, and the structural strength of the new and old bridges cannot be greatly damaged.

The invention belongs to the technical field of gravity energy storage, and particularly relates to a high-channel-utilization-rate gravity energy storage system based on vertical circulation operation, which comprises at least one energy conversion shaft, at least one empty return shaft, a top shaft transfer section and a bottom shaft transfer section, the top hoistway transfer section is communicated with the upper part of the energy conversion hoistway or the empty return hoistway through reciprocating translational motion, and the bottom hoistway transfer section is communicated with the lower part of the energy conversion hoistway or the empty return hoistway through reciprocating translational motion; racks are arranged on the inner walls of the hoistways, gears are arranged on the elevator, and the racks and the gears are meshed to achieve movement of the elevator in the circulating hoistways. Compared with an existing steel wire rope or chain annular conveying chain scheme, the conveying load is transferred to different heights of the vertical channel well wall in a distributed mode, the bottom and top horizontal transverse moving mechanism and the vertical load are transferred to a horizontal wheel rail, the conveying capacity is higher, the service life is longer and more reliable compared with a traditional circulating conveying chain cable, and the later operation and maintenance cost is reduced.

The invention belongs to the technical field of automobile transverse stabilizer bars, and relates to a static and fatigue performance research method of a transverse stabilizer bar, a finite element model of the transverse stabilizer bar is established, and the accuracy of stress and roll stiffness calculation of a numerical model under a vertical load working condition is verified through mechanical theoretical calculation and a stiffness bench test. Static strength analysis is carried out on the transverse stabilizer bar assembly under the combined load working condition; on the basis, a road load spectrum is combined with a part rack fatigue test and a virtual simulation technology, and the fatigue life of the transverse stabilizer bar is researched.

The invention relates to the technical field of experiments, in particular to an experimental method and system for testing the torsional rigidity of an aircraft tire, and is used for testing the yaw torsional rigidity of the aircraft tire under various conditions. The aircraft tire is accelerated to the target rotating speed, and then the vertical load is applied to the aircraft tire through the first oil cylinder. And finally, controlling the second oil cylinder to perform yaw torsion control on the aircraft tire according to the yaw torsion angle curve. And yaw torsion moment is collected in the yaw torsion control process. And finally, the torsional rigidity of the aircraft tire can be calculated through the torsional moment and the yaw torsional angle. According to the invention, different deflection angles can be tested under the conditions of different rotating speeds and loads, so that the corresponding torsional rigidity is obtained. In addition, a dynamic real-time stiffness model calculation method is adopted to apply the load, so that the load control is more accurate, and the safety of the aircraft tire is ensured at the same time.

The invention belongs to the field of analog simulation, and particularly relates to a runway dynamic friction coefficient real-time simulation method, system and equipment based on multi-source data. The problem that taxiing simulation is insufficient in authenticity is solved. The method comprises the following steps: acquiring runway surface temperature data, accumulated water depth and / or accumulated snow depth; judging a runway type based on the runway texture features, matching a basic friction coefficient according to the runway type, and dynamically correcting the basic friction coefficient in combination with the accumulated water depth and / or accumulated snow depth and runway surface temperature data to obtain a corrected friction coefficient; acquiring a tire vertical load, an initial sideslip angle and tire pressure data of the aircraft, calculating a tire lateral force, and calculating a final friction coefficient in combination with the updated sideslip angle, the corrected friction coefficient and the sideslip attenuation coefficient; and inputting the data into a ground taxiing model of the flight simulator to realize real-time simulation. Through the attenuation effect of the dynamic process on the friction coefficient, the simulation result better fits the real runway state.

The invention discloses a true triaxial dynamic and static combined loading and multi-field coupling test device and method. The test device comprises a test cavity; the loading system comprises an axial loading device, a Hopkinson pressure bar, a longitudinal loading device and a vertical loading device; the axial loading device is configured to apply an axial load to the test coal sample; the Hopkinson pressure bar is configured to apply an impact load to the test coal sample; the longitudinal loading device is configured to apply a longitudinal load to the test coal sample; the vertical loading device is configured to apply a vertical load to the test coal sample; the gas supply system comprises a gas bottle and is configured to inject gas into the test cavity; the fiber bragg grating monitoring system comprises a fiber bragg grating sensor and a fiber bragg grating demodulator, and the fiber bragg grating demodulator is configured to be used for sensing a change signal of a strain field of the test coal sample under the loading action of the loading system; and the ultrasonic phased array monitoring system comprises an ultrasonic transducer and is used for sensing an ultrasonic signal of the test coal sample under the loading action of the loading system.

The invention relates to the technical field of building structure monitoring, in particular to an intelligent monitoring system for a light steel structure, which comprises an environmental data acquisition module used for acquiring environmental data in a monitoring period, a structural data acquisition module used for acquiring parameters of the light steel structure and structural deformation data in the monitoring period, and a stress analysis module used for analyzing the parameters of the light steel structure and the structural deformation data in the monitoring period. The system comprises an overall wind pressure analysis module for analyzing the overall wind pressure state of the light steel building, a lateral load analysis module for constructing a wind force vector and analyzing the stress state of a ground beam column, a transverse deformation monitoring module for analyzing the transverse deformation state of the light steel building, and a vertical load analysis module for analyzing the overall wind pressure state of the light steel building. The analysis module is used for analyzing the vertical load state of the light steel building in the monitoring period, and the stability analysis module is used for analyzing the stability of the light steel building in the monitoring period. The monitoring efficiency of the light steel structure is effectively improved.

The invention provides an intelligent storage roadway stacking machine, and relates to the technical field of roadway stacking machines, the intelligent storage roadway stacking machine comprises a vertical sliding rod and a taking and placing assembly, the taking and placing assembly comprises a supporting frame slidably connected to the vertical sliding rod, one end of the supporting frame is fixedly connected with a transverse rod, and the two ends of the interior of the transverse rod are slidably connected with limiting sliding rods; a concave block is fixedly connected to the inner side of the limiting sliding rod, a straight rack is fixedly connected to the outer side of the concave block, a first supporting plate is fixedly connected to the interior of the straight rack, a torsion shaft is fixedly connected to the interior of the first supporting plate, auxiliary clamping blocks are rotationally connected to the two ends of the torsion shaft, and a supporting assembly is fixedly connected to the outer side of the taking and placing assembly. According to the triangular supporting structure, the geometric stability principle is utilized, loads in the vertical direction are evenly dispersed to all supporting points, deformation or shaking caused by single-point stress is reduced, transverse deviation of the supporting frame in the moving process is limited, and the strict vertical movement track of the supporting frame along the vertical sliding rod is ensured.

The invention relates to a multifunctional test loading device for simulating bending shear torsion performance of a wind power tower, which comprises a counter-force column, a counter-force longitudinal beam, a counter-force cross beam and four actuators, and is characterized in that the counter-force cross beam is fixed at the top of the counter-force longitudinal beam through a bolt and is connected with a first actuator for axially applying pressure; the bottom of the tower drum is connected and fixed through a loading support with a kidney-shaped hole, and the end of the tower drum is connected with a loading beam through a conversion piece and abuts against a first actuator for axial pressure applying and loading. A fourth actuator on one side of the reaction wall is used for applying horizontal shearing force and torque; second and third actuators on the upper and lower sides of the counter-force longitudinal beam are used for applying bending moment; according to the device, loading of multiple load types can be achieved on the tower drum, the complex stress condition possibly borne by the tower drum in the actual use process can be simulated, and loading of any change of a single load of the tower drum can also be simulated; the device is suitable for loading and fixing tower barrels of different types and sizes; and the influence of torsional deformation and horizontal displacement on vertical load loading can be reduced through structural measures.

The invention relates to the technical field of bridge testing, and discloses a bridge beam plate load testing device for road and bridge construction, which comprises an underframe frame and a testing frame, the underframe frame and the testing frame are connected through at least four shock absorbers, the testing frame is internally provided with a bearing assembly for bearing a to-be-tested bridge beam plate, and the bearing assembly is connected with the shock absorbers. A main sensor is arranged above the bearing assembly, and a main testing mechanism used for carrying out load testing on the bridge beam plate during bearing is arranged at the top of the bottom frame. According to the bridge beam plate load testing device for road and bridge construction, the two testing pieces are driven by the driving piece, the two testing pieces can be matched with the load piece to carry out vertical load testing work on a bridge beam plate, and the two testing pieces can be matched with the auxiliary testing mechanism to carry out lateral load testing work on the bridge beam plate; load testing work in multiple aspects is achieved, and the functionality and practicability of the load testing device are further improved.

Embodiments of the present disclosure provide a physical test system of large-scale three-dimensional multi-functional landslide-prevention and control structure. The system comprises a model test tank, a bidirectional servo loading system, a multi-scale model transformation system, a sliding surface evolution visualization system, a positive pressure monitoring system, an artificial rainfall system, and a control system. The bidirectional servo loading system applies a horizontal load and a vertical load, and the multi-scale model transformation system includes a plurality of retractable counterforce brackets, configured to change a width of the model test tank; and the sliding surface evolution visualization system includes a plurality of filming devices, configured to record a whole evolution process of a landslide sliding surface evolution.

The invention discloses a support design method of a strong support steel frame based on layer critical stiffness, and relates to the technical field of building reinforcement. Comprising the steps of calculating the critical support stiffness of a frame column and drawing a nomogram of the critical support stiffness of the frame column, calculating the critical support stiffness of a shear type support steel frame layer of each floor, calculating the critical support cross-sectional area of the shear type support steel frame of each floor under the action of no horizontal load, and calculating the equivalent support area required for resisting the horizontal load. Calculating the critical support area of each floor frame under the action of a vertical load and a horizontal load; calculating the cross section area of a tension critical support single diagonal rod; and selecting the cross section model of a shear type support. The invention discloses a support design method of a strong support steel frame based on layer critical stiffness, provides design steps of a shear type strong support for the steel frame, and in the method, discloses a calculation formula of the structural layer critical support stiffness of the shear type support steel frame and provides a nomogram convenient for engineering application.

The invention discloses a load distribution method and system for multi-pier coordination of a scouring damaged beam bridge and a storage medium. The method comprises the steps that horizontal and vertical loads acting on a bridge superstructure are obtained; calculating a load distribution result of a vertical load acting on the upper structure of the bridge on the pier according to the counter-force influence line; calculating the horizontal load which acts on the upper structure of the bridge and is distributed to the pier by adopting an iterative method, namely calculating the pier top displacement according to the latest calculated horizontal load of the pier, calculating the equivalent stiffness according to the latest calculated pier top displacement, recalculating the horizontal load distributed to the pier according to the latest calculated equivalent stiffness, and calculating the horizontal load of the upper structure of the bridge according to the calculated equivalent stiffness. The pier top displacement is the pier top displacement of the pier-pile foundation under the conditions of scouring damage, flood load and vehicle load. According to the method, the influence of scouring damage, flood and vehicle load on load distribution is considered, and the accuracy of full-bridge bearing characteristic analysis is improved.

The utility model discloses a universal test bench for axle fatigue test, which belongs to the field of axle test equipment and comprises an upper support assembly, a lower support assembly and an axle mounting seat. The upper support assembly comprises an upper support main body, and a vertical loading hydraulic cylinder for applying a vertical load to the axle is arranged on the upper support main body; the lower support assembly is fixedly connected with the upper support assembly, and the lower support assembly comprises a gantry bridge frame; the axle mounting seat is used for being mounted below a gantry bridge frame, the axle mounting seat comprises a rigid bridge mounting seat for mounting a test rigid bridge and a swing bridge mounting seat for mounting a test swing bridge, and the rigid bridge mounting seat and the swing bridge mounting seat have the same connecting port with the gantry bridge frame. According to the invention, a real stress condition can be simulated relatively truly, and different types of axle tests can be carried out.

The utility model relates to a door type flat plate net rack closed workshop under a steel plant area limited space, which comprises a vertical bearing and a roof net rack, the vertical bearing is divided into an upper section and a lower section, the lower section is a steel column, the upper section is a net rack structure consisting of a connecting rod piece and a bolt ball, the net rack structure is arranged on the steel column through a connecting support, and the roof net rack is arranged on the steel column. The roof net rack is formed by connecting a connecting rod piece and a bolt ball, and the net rack structure is connected with the roof net rack through the bolt ball and the connecting rod piece. The problem that double steel stand columns cannot be arranged in a limited space is solved, the steel structure factory building is more compact in structure, the bearing capacity of the steel columns is reduced, the size and depth of a buried foundation are correspondingly reduced, interference between surrounding buildings and structures is avoided, the construction cost is reduced, and the steel structure factory building is suitable for being built in a space-limited site.