192 results about "Pressure load" patented technology

The invention provides a shield excavation face deformation monitoring method and system for undercrossing an airport runway, and the method comprises the steps: generating a pressure load response characteristic based on the pressure fluctuation time sequence data of a cutter head hydraulic cylinder in a shield tunneling machine in combination with dynamic load distribution data and static load distribution data; the deformation track of the shield excavation face and the displacement change of a bottom soil body undercrossing the airport runway are obtained, point cloud registration processing is carried out, registered data are obtained, and two-dimensional deformation monitoring data of the shield excavation face and the bottom soil body in the horizontal direction and the vertical direction are extracted; based on the pressure load response characteristics, the two-dimensional deformation monitoring data and the surface settlement monitoring data of the undercrossing airport runway, obtaining a deformation trend prediction result of the shield excavation face; according to the method, high-precision real-time monitoring and trend prediction of collaborative deformation of the shield excavation face and the runway structure in the underpass airport runway scene are achieved, and runway operation safety and shield construction accurate control are guaranteed.

The invention provides a wallboard impact test device and test method for simulating a dampening load, and belongs to the field of bearing performance tests. Comprising a dampening wave impact load simulation loading module, a test wall plate is fixed through a test clamp tool module, and in the test impact process, obtained real-time monitoring data are sent to a controller of the dampening wave impact load simulation loading module through a test measurement module so as to complete closed-loop control of dynamic loads when dampening wave impact is simulated; the dampening wave impact load simulation loading module comprises a controller, a hydraulic power unit and a loading unit, and the controller compares experimental data of a dampening wave impact load real experiment with real-time simulation data obtained by the test measurement module, converts an obtained difference value into an electric signal and sends the electric signal to the hydraulic power unit; electric signals are converted into pressure loads through the hydraulic power unit, and actions are executed by the loading unit. According to the invention, the simulation effect of a real dampening wave-colliding service scene can be achieved.

The invention discloses a concrete depth performance detection method, and relates to the technical field of concrete performance detection.The device comprises a shell, a top cover, a combined pressurizing mechanism, a combined supporting mechanism, a water inlet pipe, a camera, a controller and a high-pressure water supply device; the method comprises a compressive strength test mode, a permeability resistance test mode and a test piece permeability detection mode after different pressure loads. Through the design, observation and research on permeability change of the test piece after loading can be realized, and data reference is provided for actual engineering. Meanwhile, the device disclosed by the invention can be used for carrying out compressive strength test and permeability resistance test, so that the applicability of the device is effectively improved, the application range is widened, and convenience is provided for in-depth research of concrete performance.

The invention discloses a high-pressure hydrogen storage cavern lining structure three-dimensional model test and monitoring system and method, and the system comprises a test loading system, a dynamic monitoring system, and a control system. The three-dimensional model test loading system comprises an annular frame type counter-force supporting structure used for providing external surrounding rock constraint counter-force support, a central cylinder pressure-bearing counter-force device coaxially nested in an annular frame and used for applying an internal high-pressure load, and a distributed servo loading unit array. The dynamic monitoring system comprises a contact type load monitoring module, an internal deformation monitoring module and a fluid pressure closed-loop monitoring module used for feeding back internal water pressure in real time. The control system can preset a stiffness coefficient or a surrounding rock displacement-counter-force change curve according to surrounding rock characteristics and test requirements, and monitors data to adjust the pressure value of the actuator in real time, so as to realize dynamic force-displacement tracking control; through integration of loading, monitoring and control functions, the cooperative deformation response characteristics of the surrounding rock and the structure of the energy storage artificial cavern are truly simulated, and the consistency of the test and the actual working condition is improved.

The invention provides a method and a device for testing the wear resistance of a self-lubricating gasket and a method for optimizing the assembly stress of a self-lubricating knuckle bearing. The method for testing the wear resistance of the self-lubricating gasket comprises the following steps: attaching the self-lubricating gasket to the surface of a substrate; a pressure load is applied to the surface of the base body attached with the self-lubricating gasket, the pressure load is determined based on preset pressure stress and the area of the surface of the base body attached with the self-lubricating gasket, and the preset pressure stress is set according to the assembly stress of the self-lubricating knuckle bearing installed on the bearing seat; and carrying out friction test on the self-lubricating gasket after the pressure load is applied, and evaluating the wear resistance of the self-lubricating gasket. According to the method, the stress condition of the self-lubricating gasket in the actual service process after the self-lubricating joint bearing is mounted on the bearing race in an interference manner can be simulated without using a finished bearing, and the influence of the assembly stress of the self-lubricating joint bearing on the wear resistance of the self-lubricating gasket can be accurately evaluated; and guidance is provided for optimization of installation and fixing process parameters and service parameters of the self-lubricating bearing.

The invention discloses blasting depressurization experimental equipment and method for an oil and gas conveying composite pipe. The blasting depressurization experimental equipment comprises composite pipe adapters, experimental medium injection systems, dual-mode blasting devices, discharge pipes and controllers, wherein the two ends of the composite pipe are each provided with a composite pipe adapter; the damage condition of the composite pipe under rapid pressure reduction in the pipe can be analyzed, the bursting pressure load of the pipe is converted into the bursting load of the bursting disc, rapid and instant leakage of a medium in the pipe can be simulated on the premise that the composite pipe is not damaged, the device is closer to engineering practice, and the device is simple in structural process and convenient to operate. And the collapse critical pressure of the lining layer of the composite pipe under different discharge apertures can be directly obtained.

The invention relates to a door and window safety performance detection device for constructional engineering, and belongs to the technical field of constructional engineering detection. The uniformly distributed load force application assembly can apply uniform or gradient change pressure to the whole surface of the door and window to simulate wind pressure; the concentrated load force application assembly can perform fixed-point impact on specific parts of doors and windows and simulate hard object impact or violent forcible entry; the wind pressure loading assembly applies uniform and gradient-adjustable wind pressure loads to the surfaces of doors and windows, simulates stress states under different wind levels and detects the air tightness of the doors and windows, and the rainfall simulation assembly simulates rainfall environments with different strengths to detect the water tightness of the doors and windows; the deformation of doors and windows, the stress of key parts of the doors and windows, the water leakage condition and the air leakage condition can be monitored, and the comprehensiveness and the real-time performance of detection data are ensured. The system can achieve the detection of multiple safety performance dimensions of the doors and windows of the constructional engineering, effectively improves the detection efficiency and precision, reduces the manual operation intervention, and provides a comprehensive and reliable data support for the safety performance evaluation of the doors and windows.

The invention discloses a pressure sensing test self-adaptive method and system based on reinforcement learning, relates to the technical field of pressure sensing test, and supports dynamic adjustment of each impact strategy by introducing a reinforcement learning module and a state sensing mechanism, so that pressure loading better conforms to an actual stress field evolution process, and the test precision is improved. Therefore, the fatigue simulation authenticity and the test pertinence are improved. The pressure response high-frequency analysis module deeply digs micro characteristics such as local wave troughs, response slope offset and micro-cycle asymmetry of returned waveforms, early recognition of potential aging, nonlinear drift or structural defects of the sensor is achieved, and the method is remarkably superior to a traditional low-frequency mean value statistical method for the problem of missing detection of abnormal responses. Historical fatigue response and temperature change trend are introduced through a state space construction module, so that a state vector has a complete time sequence background and environment dimension, and the problem of strategy misjudgment or local optimum caused by test transient distortion is avoided.

The present application relates to the technical field of construction drilling, in particular to a device and method for drilling in hard rock strata, comprising a rotating rod and a drill cylinder fixedly installed at the bottom end of the rotating rod, the top end of the rotating rod is connected to the output end of a rotary drilling machine through a hydraulic coupler, an impact mechanism and a lifting and releasing assembly are arranged above the drill cylinder, the impact mechanism comprises a first cylinder fixedly installed at the top of the rotating rod. The present application can automatically impact the hard rock strata during the drilling process of the rotary drilling machine, and can also exert a downward impact force during the rotation of the drill cylinder, effectively increasing the damage effect on the hard rock strata and increasing the instantaneous pressure load. When the hard rock strata are distributed unevenly at the front end of the drill hole, the present application can also detect the specific position of the hard rock strata below the drill cylinder, realize cyclic and directional impact, and further increase the construction speed.

The invention belongs to the technical field of aircraft structure tests, and particularly relates to an axial compression test fixture. The device comprises a supporting clamp, a rolling contact piece and a loading clamp, one end of the loading clamp is connected with an axial compression load applying device, the other end of the loading clamp is provided with a semi-cylindrical mounting groove, the supporting clamp is of a semi-cylindrical structure and is mounted in the semi-cylindrical mounting groove of the loading clamp, and an arc-shaped space is formed between the supporting clamp and the bottom of the semi-cylindrical mounting groove; the device is installed in an arc-shaped space between a supporting clamp and a loading clamp, the center of a semi-cylinder plane of the supporting clamp is connected with one end of a test piece, and the other end of the test piece is connected with the other supporting clamp and the other loading clamp which are of the same structure. And the center of the end surface of the test piece, the center of the middle section of the support clamp and the center of the middle section of the loading clamp coincide. An ideal simple support boundary is provided through rolling contact design, load centering is ensured, additional bending moment is avoided, the structure is compact, and the test precision and practicability are remarkably improved.

The utility model relates to a liquid rocket engine turbopump bearing axial clearance measuring device, which comprises a cylindrical shell, a gland, a pressure loading device, a pressure loading piece and a dynamometer, a step ring groove matched with a bearing to be measured is arranged at the upper part of the inner wall of the shell, a bearing outer ring of the bearing to be measured is embedded and supported at the groove bottom of the step ring groove, and the pressure loading device is arranged on the shell. The gland is detachably installed at the upper end of the shell, the dynamometer is arranged at the bottom in the shell, the pressure loading piece penetrates through an inner ring of a bearing to be tested, the bottom of the pressure loading piece makes contact with the dynamometer, the upper end of the pressure loading piece is provided with a force loading part attached to the upper end of the inner ring of the bearing to be tested, and the pressure loading device is installed on the gland and connected with the upper end of the pressure loading piece. And the gland is used for applying downward pressure to the pressure loading piece and is provided with a vertically through measuring hole. The device has the advantages of being simple and reasonable in structural design, reliable in work, low in operation labor intensity and capable of enabling the measurement of the axial clearance of the bearing to be more accurate and convenient.

A system for mechanical surface treating a component includes a tool and a manipulator. The tool includes a roller support, a spherical roller and a biasing device. The roller support includes an endwall, a port and an internal cavity. The roller support extends longitudinally along a longitudinal axis to the endwall. The port extends from the internal cavity through the endwall. The spherical roller is nested in the port with an exposed portion of the spherical roller projecting out of the roller support from the port. The exposed portion of the spherical roller is configured to contact a surface of the component. The biasing device is disposed in the internal cavity and biases the spherical roller against the endwall. The manipulator may move the tool along the surface of the component. The manipulator may apply a static pressure load against the surface of the component through the spherical roller.

The invention belongs to the technical field of underground space development and energy and gas storage, and particularly relates to a gas storage adaptive to high-pressure load and a construction method thereof. The gas storage comprises a chamber built in a rock stratum, an anchor rod and an inner pulling rope, wherein the anchor rod is constructed to extend into the chamber from a surrounding rock on the outer side of the chamber to form anchor rod support. And the inner pulling rope extends inwards from the free end of the inner side of the anchor rod and is connected to one point in an intersecting manner, so that radial pulling force is provided for the chamber when the pressure in the chamber is larger than the pressure of surrounding rock. Through the arrangement of the inner pulling rope, upheaval and deformation of the upper terrain cannot occur when the pressure in the chamber is larger than the pressure of the surrounding rock, so that the energy storage upper limit of the chamber is improved, the requirement for geological conditions of building of the gas storage is lowered, and good application prospects are achieved.

The invention discloses a pressure loss analysis method for a total heat exchanger core, and belongs to the technical field of total heat exchangers. The pressure loss analysis method comprises the steps that under the preset air volume, flow field solving is conducted on a flow channel of a total heat exchanger core, and pressure loads on the two sides of a diaphragm are obtained; according to the mapping of the pressure loads on the two sides of the diaphragm to the boundary of the diaphragm structure, the deformation of the diaphragm is obtained; according to the mapping of the deformation amount of the diaphragm to the boundary of the flow channel, the flow field of the flow channel of the total heat exchanger core is solved again, and the pressure loads on the two sides of the diaphragm are updated; and repeating the steps until calculation is converged, and outputting a flow field result to obtain the pressure loss of the total heat exchanger core. According to the invention, the pressure loss in the core body can be accurately calculated.

The invention relates to equipment for evaluating the bearing capacity of a pipeline through a wheel pressure method load test. The equipment comprises a datum beam, a counter-force frame and a plurality of wheel set pairs, the wheel set pair comprises two wheel sets which are symmetrically arranged relative to the axis of the reaction frame; the wheel set pair is mounted on the outer side of the counter-force frame through pressurizing equipment; the reference beam is provided with an independent support; and a plurality of displacement monitoring sensors are arranged between the inner wall of the test pipeline and the datum line beam. According to the equipment for evaluating the bearing capacity of the pipeline through the wheel pressure method load test, different mechanical properties of the pipe wall can be tested through asynchronous loads of a plurality of wheel sets, and the internal and external pressure bearing capacity resistance of the pipeline can be better reflected. The equipment has the characteristics of wheel sets, can be loaded and can move quickly, and a quicker method is provided for tests. Advance measurement can be carried out under a fixed pressure load condition; and after a plurality of load cycles, a certain step length can be carried out for measurement.

The present invention relates to the field of geotechnical experiments, and particularly to a device for vibrating and crushing tests on completely weathered granite soil masses. The device includes a bottom foundation box, and the bottom foundation box is square; an oscillation load providing spring is arranged on the power shaft of the oscillation load providing device, and above the oscillation load providing spring is an oscillation load providing plate; by pulling and pushing the slider in and out, the position of the oscillation load providing device can be adjusted; it also includes a vertical load applying device that can provide a pressure load to the material bearing box, the vertical load applying device is arranged downward and extends with a load bearing plate, and the load bearing plate can extrude the materials in the material bearing box; by using this patent, two types of loads can be achieved simultaneously, there is a spring during oscillation, and it can be fixed during extrusion, solving the problems of the current technology.

This application belongs to the technical field of aircraft wing rib strut cross-sectional parameter design, specifically relating to a method for designing aircraft wing rib strut cross-sectional parameters, including: determining the thickness δ of the bottom edge of the wing rib strut based on the thickness δ of the wing rib web. u ; Calculate the minimum moment of inertia I of the ribbed strut. umin ; Calculate the minimum area A of the ribbed strut cross section. umin ; Calculate the top pressure load R of the ribbed strut. 0 ; Calculate the thermal stress load R of the rib support. t ; Calculate the working stress σ of the ribbed strut section; Calculate the critical instability stress σ of the ribbed strut section cr ; Calculate the safety margin MS of the ribbed strut; The minimum moment of inertia I of the ribbed strut umin Minimum area A of the cross-section of the ribbed strut umin Under the constraint that the safety margin MS of the ribbed strut is greater than 0, find the area A of the ribbed strut cross section. u The minimum width b of the bottom edge of the wing-rib support 2 The height b of the web of the wing-rib support 1 The thickness t of the web of the wing-rib support 1 .

The invention discloses a cylindrical explosion container design method based on liquid medium enhancement. A radial dynamic balance equation for describing the dynamic response of a cylindrical explosion container is established. A pressure load model without packaging liquid is obtained based on a simplified finite element model, a time domain distribution model of a radial displacement field is constructed according to a similarity principle, a diffraction shielding effect and a momentum extraction effect are introduced to correct the pressure load model, and a pressure load model containing packaging liquid is obtained. A linear strengthening rigid-plastic model of a shell material is provided, and a theoretical model capable of quantitatively predicting the deformation rule of a traditional cylindrical explosion container in a time domain and a space domain is established in combination with displacement and bending moment boundary conditions. And finally, the dimensionless protection efficiency of the liquid medium enhanced cylindrical explosion container is defined, and the optimal design method of the packaging liquid size under the constraint condition is provided based on the ratio of the deformation reduction quantity to the quality of the protection structure. According to the method, the structure of the cylindrical explosion container can be quickly optimized.

The present invention relates to a device having a steam generator (10), wherein the steam generator (10) has a first side (11) and a second side (12), wherein the second side (12) is designed to generate steam, wherein the device has a first bypass line (20), wherein the first bypass line (20) is arranged to bypass the first side (11) of the steam generator (10), wherein the first bypass line (20) has a first bypass valve (22), wherein the second side (12) is connected to a steam discharge line (30), wherein the steam discharge line (30) has a steam shut-off valve (32), wherein the second side (12) has a pressure measuring device (40), wherein the device has a control device (50), wherein the control device (50) is connected to the pressure measuring device (40) and the first bypass valve (22), wherein the control device is designed to control the first bypass valve (22) depending on the pressure recorded by the pressure measuring device (40).

Plug connection unit (1), comprising at least one first electrical contact element (10) designed as a projection (11) and at least one second electrical contact element (20) designed as a receptacle (21) for the projection (11), which are designed to realize an electrically conductive connection and a mechanical fastening of the projection (11) in the receptacle (21) at least along a first translational degree of freedom (40) of the projection along its insertion direction (41) into the receptacle (21) when the projection (11) is arranged in the receptacle (21), and wherein at least one of the two contact elements (10, 20) comprises a compensation device (50) for enabling relative movements (70) of sections of this contact element (10, 20) along the first translational degree of freedom (40),which has a lower tensile stiffness than the connection stiffness of the realized mechanical fastening of the projection (11) in the receptacle (21), wherein the compensation device (50) has at least one section of reduced flexural stiffness (51) which imparts the reduced tensile stiffness to the compensation device (50), and the section of reduced flexural stiffness (51) comprises a meandering bending element (52), characterized in that a pressure element (54) is arranged on at least one of two side edges (53) of the meandering bending element (52) opposite one another along the first translational degree of freedom (40), for bearing against the respective opposite side edge (53) in the event of a pressure load on the bending element (52) in the direction of the respective other contact element (10, 20), wherein the second electrical contact element (20),the at least one section of reduced flexural rigidity (51) and the pressure element (54) lie in one plane.,

To provide a rotary compressor that ensures sufficient compressor capacity and resistance to high-pressure loads on the medium to be compressed. [Solution] In a rotary compressor (100) housed in a sealed container (C) and having a compression section (30) for compressing a medium to be compressed and a drive section (40) for driving the compression section (34), the sealed container (C) comprises a hollow first shell (10) having an opening that is open on at least one axial side, and a second shell (22) that closes the opening, wherein the diameter of the first shell (10) on one axial side that houses at least a part of the compression section (30) is larger than the diameter of the other axial side that houses at least a part of the drive section (40), and the axial side portion of the first shell (22) that houses at least a part of the compression section (30) is covered by the second shell (22) from the radially outside, and the first shell (10) and the second shell (22) are in contact with each other with a radial overlap to form a cover section (50).

The utility model provides an exhaust part with small holes, a shoe sleeve tensioning hydraulic cylinder and a shoe pressure loading hydraulic cylinder. An exhaust part with small holes comprises an exhaust part body, a through hole is formed in the exhaust part body, and at least one section of the through hole is the small hole with the diameter not larger than 0.3 mm. The shoe pressure loading hydraulic cylinder comprises a piston and a cylinder barrel; the piston is provided with an exhaust channel; an exhaust part body is detachably arranged on the piston; one end of the through hole of the exhaust piece body is communicated with the highest position of the cavity, and the other end is communicated with the exhaust channel. The shoe sleeve tensioning hydraulic cylinder comprises a fixed plate fixedly arranged below the shoe core; a gas channel is arranged on the fixing plate, one end of the gas channel is arranged at the mounting end of the exhaust part body, and a gas pipe is arranged at the other end of the gas channel and connected with a cavity of the shoe sleeve tensioning hydraulic cylinder. According to the utility model, the small holes below 0.3 mm are used for exhausting air; the problem of loading force fluctuation caused by residual air in a hydraulic cylinder and a hydraulic pipeline is solved.

The invention provides a packaging structure of a differential pressure sensitive element. The packaging structure comprises a packaging base, a pressure conduit and a column array structure, the central axes of the column array structure, the first pipeline of the pressure conduit and the differential pressure sensitive element coincide and are parallel to the central axis of the packaging base; the column array structure comprises a plurality of column units surrounding the periphery of the first pipeline; and the differential pressure sensitive element is fixed on the first pipeline opening of the pressure conduit and the second array surface of the column array structure. By arranging the column array structure, including setting the length, position height and form of the column unit, setting the size relationship among the column array structure, the differential pressure sensitive element and the pressure conduit, isolating the stress of a static pressure load on the differential pressure sensitive element, reducing the influence of high static pressure on the differential pressure sensitive element, and inhibiting the static pressure deviation; and the measurement accuracy and repeatability of the differential pressure sensitive element are improved.

The invention provides an intelligent simulation method and device for wheel impact and a server, and relates to the technical field of intelligent simulation, and the method comprises the steps: determining a three-dimensional geometric model of a target wheel according to material attributes and orientation information of the wheel; determining a loading position and an impact direction of the punch hammer based on the impact interaction point, updating the punch hammer model to obtain a target punch hammer model, and determining a rack constraint condition and a buffer boundary condition according to the fixed surface; based on a preset gas state equation, establishing a bidirectional coupling relationship between tire deformation and air pressure change in the simulated air cavity so as to determine a pressure load of gas in the tire; and executing wheel impact process simulation processing in the target wheel three-dimensional geometric model through an explicit dynamics solver by utilizing the target impact hammer model, the rack constraint condition, the buffer boundary condition and the gas pressure load so as to generate simulation results of the wheel impact process and the structure rebound process after the removal of the simulation impact hammer. According to the invention, the simulation accuracy can be obviously improved.

The present application belongs to the technical field of friction parameter identification system and method, and discloses an identification device and method for studying thermal friction model related parameters. The device is composed of a fixed support structure, a vibration control system, a test piece fixing clamp, a load applying device, a temperature control device, an exciting device and a vibration measuring device. The vibration control system is fixed on one side of the fixed support structure. The exciting device is located on one side of the vibration control system and used for generating exciting force. The test piece fixing clamp includes a movable clamp and a fixed clamp. The fixed clamp is fixed on the fixed support structure. The top end of the movable clamp contacts the load applying device for loading, and the side surface of the movable clamp is connected with the exciting device so as to vibrate. The load applying device can give relatively stable normal pressure load according to the required load, and will not be disturbed due to external vibration, thereby ensuring the accuracy of experimental results. The variable mass vibration structure can change the overall mass of the vibration structure, meeting the needs of the same frequency vibration structure.

The utility model provides a damping device and elevator equipment, the damping device comprises a first shell, a second shell and an elastic energy absorption part, the elastic energy absorption part is stacked between the inner wall of the first shell and the inner wall of the second shell, the damping device further comprises at least one limiting assembly, the limiting assembly comprises a limiting mounting piece and at least one fixed connecting piece, and the limiting mounting piece is fixedly connected with the fixed connecting piece. At least one strip-shaped hole is formed in the limiting installation part, the second shell is provided with a connecting structure, and the fixed connecting part penetrates through the strip-shaped hole and is fixedly connected with the connecting structure on the second shell so that the limiting installation part can be fixed to the second shell. The limiting installation piece and the first shell are arranged at intervals in the stacking direction of the first shell, the second shell and the elastic energy absorption part, and a preset included angle is formed between the extending direction of the strip-shaped hole and the stacking direction. According to the elevator damping device, the first shell and the limiting installation piece make contact with each other when the pressure load borne by the damping device is too large, the rollover risk is avoided, and the operation safety of elevator equipment is guaranteed.

The invention provides a packer rubber cylinder optimization design method, device and equipment and a storage medium, and belongs to the technical field of oil and gas well engineering oil testing and well completion. The method comprises the following steps: acquiring measured mechanical property data of a rubber cylinder rubber material at an expected service temperature of a research well; rubber constitutive model fitting is carried out, and a target rubber constitutive model is determined according to a fitting result; rubber sleeve structure parameters and metal framework structure parameters of the research well are obtained; constructing a rubber sleeve combination finite element parameterized model; obtaining the temperature and the pressure load of the rubber sleeve under the specific well completion and oil testing working condition of the research well, and carrying out simulation analysis on the rubber sleeve combination finite element parameterized model under the temperature and the pressure load to obtain a rubber sleeve simulation analysis result; the sealing effect of the packer is evaluated according to the rubber sleeve simulation analysis result; and determining an optimal design scheme of the rubber sleeve according to an evaluation result. By means of the method, optimal design of the high-temperature-resistant and high-pressure-resistant packer rubber barrel is achieved, and the application requirements of ultra-deep and extra-deep wells are met.

The application discloses a kind of bridge crane stress history acquisition method and system, the method includes obtaining the characteristic data of crane actual working state under preset time;The hoisting load data of preset time is expanded by Latin hypercube sampling technique, obtain the hoisting load data of crane inspection cycle, the hoisting load data of inspection cycle is input into the pre-trained tentacle-least squares support vector machine prediction model, and the predicted working cycle number is obtained;The hoisting load data of inspection cycle and the predicted working cycle number are converted into the trolley wheel pressure of equal sample size;The finite element model of crane girder is established, and the trolley is simulated with random load at rated speed from the side span of girder to the other side span, after traversing all trolley wheel pressure load, the stress history of crane girder at any position in inspection cycle is obtained.The application provides high-precision stress characteristic data for crane structure fatigue life assessment.

The invention discloses a simulation test device for a dam body of a coal mine underground reservoir, and belongs to the technical field of coal mine underground reservoirs. The test device comprises a simulation reservoir body, the simulation reservoir body comprises a bottom plate and at least three dam bodies extending in the longitudinal direction, a water storage space is defined by the bottom plate and the dam bodies, and a simulation coal seam is arranged on the outer side face of the dam body on one side; the confining pressure loading device acts on the outer side face of the dam body on at least one side and is used for outputting pressure to the dam body; the osmotic pressure loading device is used for draining water into the simulated reservoir body so as to form osmotic pressure loading on the dam body; the mining loading device acts on the surface of the simulated coal seam and comprises a cutting device and a first driving part for controlling the cutting device, and the cutting device cuts the simulated coal seam under the action of the first driving part; and the monitoring device comprises a detection unit and a control unit, and the control unit controls the confining pressure loading device, the osmotic pressure loading device and the mining loading device and obtains detection data of the detection unit. The method is used for carrying out stability analysis on the dam body of the coal mine underground reservoir.

The application relates to a pipe bending strength simulation analysis method based on interference assembly, which comprises the following steps: S1, establishing a finite element model of a pipe to be processed; S2, giving material properties and section attributes, and establishing a displacement constraint application point; S3, setting all contact relations except an overlapping area between an elastic block and an outer pipe, applying a pressure load on the upper surface of the elastic block, making the overlapping area between the elastic block and the outer pipe less than a preset overlapping area threshold, applying a fixed constraint at one end of the outer pipe, and applying a displacement constraint at the displacement constraint application point; S4, setting the contact relation between the elastic block and the outer pipe, performing pre-compression calculation, and eliminating the pressure load on the elastic block; and S5, controlling the displacement constraint at one end of an inner pipe, and obtaining the pipe bending strength. The application can avoid finite element calculation non-convergence in the simulation calculation process of the pipe bending strength of the elastic block large deformation interference assembly, and improves the calculation convergence and calculation efficiency of the pipe bending strength simulation analysis.