318 results about "Static loading" patented technology

The invention relates to the technical field of mechanical engineering, in particular to a three-dimensional simulation design method and system based on an elevator structure. The method comprises the following steps that an elevator structure drawing is obtained; a three-dimensional elevator assembly is constructed according to the elevator structure drawing; lift car static load simulation is conducted according to the three-dimensional elevator assembly, and lift car static load data are obtained; detecting the structural strength of the lift car based on the lift car static load data; evaluating welding defects based on the structural strength of the lift car, and generating welding defect data; identifying a weld weak area according to the welding defect data; determining the abrasion loss of the car structure based on the weld weak area; according to the lift car structure abrasion loss, the lift car bottom plate fracture risk is predicted; carrying out welding optimization design based on the fracture risk of the bottom plate of the lift car to obtain welding optimization design data; and traction and traction simulation is conducted according to the three-dimensional elevator assembly, and traction and traction data are obtained. Based on the mechanical engineering technology, the safety and stability of the elevator structure are improved, and the design precision and efficiency are remarkably improved.

The present invention belongs to the technical field of impact tests, and particularly relates to a catapult take-off and arrested impact test apparatus, comprising a supporting frame, an auxiliary supporting and guiding apparatus above the supporting frame, a mounting base below the supporting frame, a servo actuator, an oil circuit system, and a control and measurement system. The oil circuit system comprises an oil source, a low-pressure accumulator group, a high-pressure accumulator group, an oil inlet valve block, an oil return valve block, a servo valve block, an oil source low-pressure oil return pipe, an oil source high-pressure oil outlet pipe, and necessary tubes among components. The control and measurement system comprises a vibration and impact loading upper computer, a vibration impact controller, a static loading upper computer, a hydraulic servo controller, a servo valve, and an accelerometer. The servo actuator is internally provided with a displacement sensor. The present invention can be widely applied to conventional vibration and impact tests of various suspension launch apparatuses in a suspension-mounted state, as well as arrested impact tests under composite waveforms.

A true triaxial time-dependent dynamic disturbance test device for a deep-buried hard rock includes a rigid static load loading assembly and a rigid dynamic load loading assembly. The rigid static load loading assembly applies a static load to a rock test sample, and the rigid dynamic load loading assembly applies a disturbance stress to the rock test sample. Coupled application and control of a long time-dependent static force and a disturbance stress of the rock in a true triaxial disturbance stress state are achieved. The rigid dynamic load is provided with a disturbance rod in a loading direction, and a “point” disturbance mode is converted into a “face” disturbance mode through the disturbance rod, a disturbance hole and a test sample clamp, so that a disturbance mode more suitable for an actual working condition on site is provided while power consumption is reduced and time-dependent dynamic disturbance is achieved.

The invention discloses a mining section coal pillar goaf side concrete wall reinforcing method, and relates to the field of coal mining, and the method comprises the following steps: collecting section coal pillar geological parameters; calculating a boundary position of a plastic zone according to geological parameters of the coal pillar, and dividing the coal pillar into a broken zone, a fractured zone and an original structure zone; basic roof strata are determined according to geological parameters of the coal pillar, the bearing capacity of the basic roof strata is calculated, the basic roof strata with the minimum bearing capacity serves as a roof cutting target layer, and the hydrofracture roof cutting drilling depth needed for penetrating through the target layer is determined; the broken area range serves as the influence range of surrounding rock pressure calculation, the static load q applied to the concrete wall by the surrounding rock pressure is calculated, the static load q is corrected through a dynamic load coefficient, and a supporting load Q is obtained; and according to the support load Q, reinforcement parameters are determined. Aiming at the surrounding rock deformation and instability of the adjacent roadway on the section coal pillar gob side under the deep well mining condition, the method effectively controls the surrounding rock deformation and instability of the adjacent roadway caused by working face mining disturbance.

The invention relates to a fatigue test device and method for an energy storage spring, and the method comprises the following steps: 1, taking the energy storage spring in a to-be-tested high-voltage circuit breaker, measuring the parameters of the energy storage spring, and carrying out the preliminary machining; 2, the energy storage spring obtained after primary machining is installed on a fatigue test device; 3, statically and statically loading the energy storage spring to the compression height H1 on the fatigue test device; 4, initial stress measurement and fatigue test of the energy storage spring are carried out, and test data are obtained; and 5, processing the obtained experimental data to obtain an experimental result. The method comprises the following steps: firstly, performing two-stage compression on a spring to H1 by performing staged static loading, then adjusting the compressed spring and a compression device to a starting point of a maximum compression stroke of a fatigue testing machine, and reserving enough compression displacement space for large-stroke compression fatigue.

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 invention discloses a quasi-static loading system for plane local loading and a loading method of the quasi-static loading system, and aims to solve the problem that a processing method for accurately simulating a complex stress state of a shear wall under an equipment anchoring effect does not exist at present. A bottom-arranged boundary fixing piece is arranged at the bottom of a counter-force portal, and an out-of-plane local load loading assembly is arranged on the top surface of the bottom-arranged boundary fixing piece; the vertical loading piece and the in-plane horizontal transverse loading assembly are arranged in the counter-force portal frame, a placing part matched with a test piece is formed between the bottom side of the loading beam and the top surface of the bottom boundary fixing piece, the two horizontal actuators are arranged at the two ends of the loading beam respectively, one end of each horizontal actuator is connected with the loading beam, and the other end of each horizontal actuator is connected with the in-plane horizontal transverse loading assembly. The other end of each horizontal actuator is arranged on the inner wall of the side part of the counter-force gantry; the quasi-static force loading method comprises the following steps: performing preset vertical axial force application, prestress tension grading and / or supplementary tension treatment on a test piece according to preset requirements, and then performing horizontal cyclic loading until the bearing capacity of the test piece is reduced to 85% of a peak load, and terminating the loading process.

The invention provides a manufacturing method of a material storage plastic container with reinforcing ribs, and belongs to the technical field of material storage containers, initial data is obtained through a limit-general experiment, a reinforcing rib parameter equation set is constructed, and finite element analysis software is used for iterative optimization. Candidate parameters are screened by adopting an expansion-increasing Latin hypercube experimental design method, small-batch prototype samples are manufactured, and comprehensive performance detection such as static load, fatigue, environmental adaptability, impact resistance, chemical corrosion, temperature adaptability, sealing performance and compressive deformation resistance is carried out. And parameters with the optimal comprehensive performance are selected based on the detection result, and the injection molding technology is accurately set and comprises temperature control, mold design and surface treatment. The production line environment and quality are strictly controlled, large-scale production of the material storage plastic container is finally achieved, stable and reliable product performance is ensured, and the problems that an existing material storage plastic container is insufficient in bearing capacity and deformation resistance and short in service life are solved.

The invention relates to the technical field of connection structure testing, in particular to a bridge deck slab dry joint connection structure testing method which comprises the following steps: preparing a bridge deck slab test piece containing a steel structure embedded dry joint; building a testing device, and arranging strain, displacement and pressure sensors in a dry joint area; carrying out a graded loading test, including static loading to 1.5 times of the designed bearing capacity and dynamic cyclic loading; an environment simulation test is carried out, and repeated loading is carried out in a temperature and humidity circulation box simulation environment; data are evaluated through a multi-source data fusion optimization algorithm model, and indexes such as flexural rigidity and shear rigidity are calculated; in addition, a construction stage simulation test is added, and the alignment deviation and the filling compactness of the components are monitored. According to the method, the structural performance can be comprehensively evaluated, key indexes can be accurately evaluated, durability degradation can be scientifically predicted, construction simulation is innovated, test conditions are guaranteed to be consistent, visualization and verification are achieved, and the problem of limitation of a traditional test method is effectively solved.

The invention relates to the technical field of bridge bearing capacity evaluation, in particular to a bridge bearing capacity accurate evaluation method, which comprises the following steps: acquiring stress data and deflection data of each position of a bridge under different static loads, and acquiring vibration data of each position of the bridge under the application of a dynamic load; according to the data distribution change and fluctuation degree of each position of the bridge under different static loads, a bridge stress change abnormal value and a bridge deflection data change abnormal value are obtained in combination with nonlinear change characteristics of the data, so that an abnormal coefficient of bridge stress deformation is obtained; the method comprises the following steps: acquiring significant values of abnormal vibration of each position under a dynamic load, further obtaining a comprehensive deviation coefficient of each position under the action of multiple loads, calculating a vulnerability degree value of each position of a bridge, adjusting a grid size in a bridge finite element model construction process, and counting bearing capacity of the bridge under different loads based on the bridge finite element model. The accuracy of the evaluation result of the bridge bearing capacity can be improved.

The invention discloses a fan blade vibration stress calculation method and device, electronic equipment and a storage medium, and the method comprises the steps: S1, determining a point where the blade tip circumferential vibration displacement, which can be excited by an excitation source, of a blade in each-order mode is determined to be greater than a preset value within a working rotation speed range through finite element analysis, and determining a final blade tip amplitude measurement point; and S2, calculating the vibration stress of the fan blade in each order mode under each working condition according to the displacement of the blade tip amplitude measuring point in each order mode, the position of the blade measured by the final blade tip amplitude measuring point in a static state, and the relationship between the displacement of each measuring point in each order mode and the vibration stress in the corresponding order mode. According to the invention, fewer final blade tip amplitude measurement points can be selected to realize blade tip amplitude measurement, so that the test frequency and period are greatly reduced; meanwhile, the deformation of the blade under the static load is considered, and the displacement change of the measuring point caused by the deformation of the blade is avoided, so that the error of the vibration stress of the fan blade in each modal under each working condition obtained by conversion is smaller and more accurate.

The invention discloses a bench static load pressure test device, which comprises a support seat, a guide rail assembly arranged on the support seat, and column assemblies symmetrically arranged on two sides of the guide rail assembly, the top of each column assembly is provided with a vertical lifting mechanism, and the driving end of each vertical lifting mechanism is connected with a transverse moving platform; the transverse moving platform is provided with a bionic pressure applying assembly, and the bionic pressure applying assembly comprises a hydraulic servo assembly, a multi-axis linkage joint and a bearing plate; wherein the lower end face of the bearing plate is provided with a bionic pressing body, and the bionic pressing body is provided with a deformable contact array and an embedded thin film pressure sensor; a spoke type force sensing unit is arranged between the hydraulic servo unit and the multi-axis linkage joint, a scanning module is arranged on the transverse moving platform and used for scanning the deformation amount of the step stool in real time and feeding back the deformation amount to a control system to form a force-deformation data closed loop, a static load loading force field of the step stool in a real foot contact state is accurately simulated, and the detection accuracy is improved.

The present invention proposes a test and detection method for an overload protection type viscous damper, the method comprising the following steps: adopting a static loading test, controlling the loading unit of the test machine to make the overload protection type viscous damper to be tested move at a uniform speed, and recording the limit displacement value of the reciprocating motion of the damper; setting a total of four independent tests, respectively testing at three speed gears and corresponding test displacements, the test speed and test displacement in the first test are consistent with the parameter settings in the last test. By adopting a static loading test and uniform motion control, the actual working state of the damper can be accurately simulated, the accuracy and representativeness of the test results can be improved, and by comparing the maximum output deviations of the first and fourth tests, the durability and consistency of the damper can be effectively evaluated to ensure its reliability in long-term use.

An ultrahigh-temperature-resistant full ball bearing comprises a bearing outer ring, a bearing inner ring and a roller, the roller is spherical and is arranged in a roller path in a full complement mode, and the bearing outer ring, the bearing inner ring and the roller are all made of carbon fiber reinforced ceramic matrix composite materials. The design method comprises the following steps: S1, determining the inner diameter d, the outer diameter D and the width B of the bearing; and S2, determining an inner groove curvature radius coefficient fi and an outer groove curvature radius coefficient fe of the bearing based on a principle of reducing the working contact stress of the bearing and prolonging the fatigue relieving life of the bearing. And S3, the value ranges of the roller diameter DW, the center diameter DWP and the roller number Z of the bearing are determined. And S4, optimizing and determining the roller diameter DW, the center diameter DWP and the roller number Z of the bearing by taking the principle of obtaining the maximum radial basic rated static load. By applying the high-temperature-resistant bearing, the technical problems that an existing bearing loses efficacy quickly due to high temperature and insufficient lubrication in a high-temperature environment for a long time, and a bearing made of a ceramic material is low in fracture toughness and thermal shock resistance can be solved.

The invention provides a failure safety topology optimization design method under a dynamic load. The method comprises the following steps: step 1, defining a design domain and design parameters of a structure; 2, performing transient dynamic analysis on the structure; 3, calculating to obtain an equivalent static load of the dynamic load; 4, performing failure safety topological optimization design on the model under the equivalent static load; the maximum flexibility of the minimization structure under the local failure condition is taken as an optimization target; carrying out optimization iteration on the design variable unit density by using a moving asymptote method until the internal loop failure safety topological optimization process is finished; and 5, according to the design variable updated after the failure safety topological optimization, judging whether an outer circulation convergence condition is met or not. According to the method, the possible local failure condition of the structure is fully considered in the design process, and the performance of the structure under the local failure condition is improved; the dynamic load under the original working condition is converted into the static load through the equivalent static load method, and the calculation efficiency of the optimization process is effectively improved.

The invention discloses a variable-diameter yarn bundle constraint control mechanism of a composite rod production line, relates to the technical field of composite rod production, and can solve the problem of small tension after a glass fiber bundle is laid and wound in the prior art. The variable-diameter yarn bundle restraint control mechanism of the composite rod production line comprises a carrying disc assembly which comprises a movable carrying disc and a static carrying disc which are arranged in parallel and rotationally connected, and a plurality of restraint unit assemblies used for restraining and controlling the distance between an axial yarn bundle and the outer wall of an electric pole mold. Wherein a movable disc inner ring is arranged in the movable loading disc, and a static disc inner ring is arranged in the static loading disc; the multiple restraining unit assemblies are rotationally and symmetrically distributed in the circumferential direction of the carrying disc assembly, one end of each restraining unit assembly is slidably connected to the movable carrying disc in the radial direction of the carrying disc assembly, and the other end of each restraining unit assembly is fixedly connected to the movable carrying disc through a movable disc inner ring and a static disc inner ring. And the driving assembly is used for driving the dynamic loading disc to rotate on the static loading disc.

The invention discloses a test system and method for simulating cycle performance evolution of a soft soil jacket pile foundation, and belongs to the technical field of geotechnical engineering indoor model experiments. The lateral ultimate bearing capacity, the displacement distribution rule and the pile-soil interaction mechanism of a pile group system in soft soil are disclosed through a static load test, a theoretical basis is provided for evaluating the foundation stability, and the cyclic load test simulates alternating loads such as long-term waves and earthquakes in the marine environment. Evolution characteristics of soil body rigidity degradation, pile foundation accumulated damage and interface slippage are illuminated, the defects of traditional design on dynamic coupling effect and fatigue life prediction are overcome, design parameters of the jacket foundation in the soft soil foundation can be optimized through test results, safety and durability of offshore wind power, oil and gas platforms and other projects under extreme loads are improved, and the foundation performance is improved. And meanwhile, a test support is provided for a pile foundation performance degradation model under multi-disaster coupling.

The invention relates to a method for constructing a rock crushing damage model under impact loading and application thereof, and belongs to the field of rock mass engineering. The method solves at least one of the problems that reliability and accuracy are insufficient when an existing rock model predicts the failure evolution law and / or strength under direct impact loading, and it is difficult to reveal the change law under direct impact loading. The method comprises the following steps: S1, based on a wing crack propagation model, obtaining a tensile damage model under quasi-static loading; s2, a correction factor is introduced to correct the tensioning damage model under static loading, and a tensioning damage model expression under direct impact loading is obtained; s3, determining the dynamic fracture toughness of the rock; s4, determining a correction factor; and S5, constructing a tension damage model under direct impact loading. According to the method, the accuracy and reliability of the model in predicting the strength of the rock under the direct impact loading and the damage evolution law are enhanced, and the obtained model can reveal the quantitative change law of the damage of the rock under the direct impact loading.

The invention discloses a cement mixing pile single-pile composite foundation static load test device and method, and relates to the technical field of foundation load test devices.The cement mixing pile single-pile composite foundation static load test device comprises a rack with a power loading head, and the rack is provided with a bearing plate, a first loading plate and a second loading plate; a layered displacement monitoring mechanism and a data analysis mechanism are arranged on the rack; and the layered displacement monitoring mechanism is used for detecting the displacement of the second loading plate. By arranging the data analysis mechanism, two kinds of thrust are formed to jointly act on the sliding piston in the thaw collapse displacement average hydraulic cavity, the displacement of the sliding piston is detected by the first displacement sensor to obtain thaw collapse displacement, and the bearing displacement is calculated by combining the total displacement obtained by the layered displacement monitoring mechanism; the mechanism realizes accurate separation of frozen soil thaw collapse displacement and bearing displacement through a mechanical structure, solves the problem of test result deviation caused by incapability of distinguishing two types of deformation, and enables test data to truly reflect the bearing capacity characteristic of a single-pile composite foundation.

The invention belongs to the field of aero-engine dynamics, and particularly relates to an integrated double-squirrel-cage elastic support pre-adjustment concentricity design method. Comprising the following steps: step 1, acquiring an integrated double-squirrel-cage elastic supporting structure; 2, calculating the fulcrum sinkage of the integrated double-squirrel-cage elastic supporting structure; step 3, calculating a static eccentricity rate under the action of a static load according to the fulcrum sinkage, judging whether to carry out pre-adjustment concentric design or not according to the static eccentricity rate, and if so, entering step 4; step 4, calculating a preset concentric amount according to the fulcrum sinkage; and 5, carrying out pre-adjustment concentric design on the integrated double-squirrel-cage elastic supporting structure according to the pre-adjustment concentric quantity. The method has the advantages of being comprehensive in consideration factor, accurate, efficient, standard in process and the like, and the blank of the pre-adjustment concentric design technology of the integrated double-squirrel-cage elastic supporting structure is filled.

The utility model discloses a pile head protection device for a static load test, which comprises a pile foundation body and a protection top seat, the axis of the pile foundation body is vertically arranged, the protection top seat is coaxially placed on the top end face of the pile foundation body, and a plurality of wing seats horizontally and radially are fixed on the periphery of the protection top seat in an extending manner. The bottoms of the wing seats are provided with sliding adjusting assemblies which can slide in the length direction to adjust the position and be locked. The protective top seat has the advantages that after the protective top seat is arranged on the top end face of the pile foundation body, the protective top seat can be detachably fixed to the top face of the pile foundation body in the mode that the clamping and fixing assemblies in the circumferential direction of the protective top seat are all pressed on the periphery of the pile foundation body, and the end face of a pile head is protected; the protective footstock is prevented from moving on the top end face of the pile foundation body, and the stability of the protective footstock in the use process of the static load test is improved.

A rehabilitation system for use with a limb brace assists a user in regaining, flexion, extension and hyperextension flexibility in an injured joint as well as aiding in resistance training in order to regain lost muscle mass about the joint. The system uses a pair of band holders that are rapidly attached to and detached from the pair of aligned brace legs of the brace, each holder having a receiver. An interchangeable resistance band is removably received within each receiver, either in the posterior or anterior position, held therein by bulbous ends of the band. The resistance band introduces static loading when the user is at rest as well as dynamic loading when the user is utilizing the joint. A pulley system can be used to offer the resistance band a medially located pivot point so that the resistance band offers variable resistance during dynamic loading.

The utility model belongs to the field of multi-field coupling tests, and particularly relates to a pure bending stress simulation-sound load-vibration combined loading test device. The device comprises a high-sound-intensity traveling wave tube, a static force loading module, a vibration table and a test piece, and the high-sound-intensity traveling wave tube is provided with an opening for accommodating the test piece; the static force loading module is mounted on the vibration table and is used for performing static force loading on the test piece; one end of the test piece extends into the high-sound-intensity traveling wave tube from the opening, and the other end of the test piece is connected with the static force loading module. According to the pure bending stress simulation-sound load-vibration combined loading test device disclosed by the invention, a set of new test device capable of simultaneously simulating pure bending stress, strong noise and strong vibration load is designed based on a four-point bending static loading mode on the basis of a traditional multi-field coupling test device; finally, the pure bending stress simulation-sound load-vibration combined test of the thermal protection structure test piece is realized.

The invention relates to a construction method for accurately determining the pile length of a cast-in-place pile in a karst cave area, which comprises the following steps of: drilling a pile body of the cast-in-place pile penetrating through the karst cave area, and enabling the depth of advanced drilling into a complete rock to be equal to the value of a designed engineering pile into the rock + 5m; advanced drilling data are analyzed, and the pile length of the cast-in-place pile is preliminarily determined according to the design drawing, the normative rock entering requirement and the adjacent pile bottom height difference requirement, the rock entering is not smaller than one time of the pile diameter D, and the height difference of the adjacent pile bottoms in the drawing is not larger than one time of the pile center distance. And according to the preliminarily determined pile length of the cast-in-place pile, when the depth of the short pile entering the complete rock is larger than 2D, drilling holes are added. And according to newly-added drilling data, the pile length judgment standard of the short piles without karst cave distribution in the drilling result is adjusted, the pile length of the short piles is determined again, and if karst cave distribution exists in the drilling result, construction is conducted according to the pile length of the standard judgment standard of an original design drawing. And according to the final pile length, cast-in-place pile construction is conducted, and after construction is completed, low-strain dynamic detection, ultrasonic transmission detection and a low-speed load maintaining method static load test are conducted. According to the method, the pile length of the cast-in-place pile can be accurately determined, pile length redundancy caused by conservative design is avoided, time cost, personnel cost and material cost can be effectively reduced, usability is high, and the method is suitable for application and popularization.

The invention discloses a large-stroke aircraft airfoil static force loading system for aircraft strength testing, and particularly relates to the technical field of aviation structure testing, and the large-stroke aircraft airfoil static force loading system comprises a multi-region loading execution module for realizing distributed autonomous loading and state sensing; the boundary coordination control module realizes force field continuity between loading areas through flexible fusion; the asynchronous self-synchronization adjustment module adjusts a loading step pitch based on local feedback and a loading offset prediction function; the redundant closed-loop feedback control module adopts a force value and displacement dual-channel path; the loading path modeling and reproduction module realizes historical path playback and loading track reproduction by constructing a track data set; according to the invention, continuous coordination of multi-region loading force fields is realized, the adaptive adjustment capability of loading step pitch and frequency is improved, and the loading behavior is dynamically optimized through a path difference feedback mechanism; a redundancy feedback and path reproduction mechanism is configured, and the fault tolerance and loading consistency of the system are enhanced; and intelligent scheduling is realized based on the shared table, so that the loading precision, stability and efficiency are remarkably improved.

The invention discloses a large-scale wind power blade fatigue test load calculation method considering pre-bending and geometric nonlinearity, and aims to solve the problem that a calculation result and actual test data have significant deviation during traditional large-scale wind power blade fatigue test load calculation. The method comprises the following steps: step 1, establishing a wind power blade discretization model considering pre-bending, and optimizing section data through a segmented cubic Hermite interpolation method; and step 2, calculating a rotation angle of a pre-bending line and a deflection of the pre-bending line on each discretized section of the blade based on the optimized section data, and calculating a static balance position and a bending moment mean value of each discretized section of the blade under the action of a static load by adopting a geometric nonlinear corrected stiffness matrix. And step 3, based on the static balance position of the blade, a multi-degree-of-freedom system dynamics method is adopted to solve the bending moment amplitude on each discretized section of the blade when the blade fatigue test system operates in a steady state.

The invention discloses a system for predicting the bearing capacity of a prestressed concrete pile through a static pressure method. The system comprises a static pressure pile machine construction monitoring module, a digital static sounding module, a data receiving module, an interactive touch screen module, a bearing capacity calculation module and a cloud data center. The invention further discloses an implementation method of the static pressure method prestressed concrete pile bearing capacity prediction system, the feed-forward neural network model is used for correlation analysis of bearing capacity prediction data, input original data can be efficiently analyzed, after each time of model iteration, the updated model is transmitted to the on-site algorithm analysis unit through the 5G module, and the prediction result of the bearing capacity of the static pressure method prestressed concrete pile is obtained. Dynamic updating and optimization of the field model are achieved, the real-time performance and accuracy of prediction of the ultimate bearing capacity of the prestressed concrete piles are effectively improved through the mechanism, the limitation that a traditional acceptance method only depends on static load tests of a few piles is overcome, the bearing capacity of all the piles can be comprehensively evaluated, and potential safety hazards of construction are reduced.

The invention discloses a truck bogie side frame / swing bolster CAD / CAE (computer-aided design / computer-aided engineering) integration method and a truck bogie side frame / swing bolster CAD / CAE integration system, and belongs to the technical field of rail transit equipment design. The truck bogie side frame / swing bolster CAD / CAE integration method comprises the following steps: preprocessing an original CAD model, and converting input parameter data into ANSYS software recognizable format; constructing a CAE (Computer Aided Engineering) template on the basis of ANSYS Workbench and intelligent mapping; and carrying out CAE simulation analysis by utilizing the recognizable parameter data and constructing a CAE template, and automatically generating a simulation analysis report. A CAE (computer aided engineering) simulation analysis template is established by utilizing CAD (computer aided design) geometric modeling, so that full-process automatic analysis under the working conditions of static load and static strength stipulated by TB / T 3549.2 is realized, and the design efficiency and reliability of the side frame / swing bolster of the truck bogie are remarkably improved.

The invention discloses an anti-sliding friction force testing device under the action of high-temperature hot air, which comprises a loading sealing device, an air circulation heating system, a static force loading system and a temperature measuring system, the loading sealing device comprises a bearing frame, a bottom plate, a lower flange gland, a test piece, an upper flange gland, an upper exhaust cabin, a disc type loading tool, an upper pressing plate, a window and a window pressing plate, the air circulation heating system comprises a heating system and a ventilation system, and the air circulation heating system is connected with the loading sealing device through a circulation pipeline; the static force loading system comprises an oil source control upper computer, an oil source, a cooler, a hydraulic substation, a static force loading upper computer, a servo oil cylinder, a servo controller and a switching cabinet, and the temperature measurement system comprises a thermocouple sensor, a data acquisition instrument and a temperature measurement upper computer. The test system can be widely applied to the sliding friction resistance test of various wrapped interlayer assembly structures in normal temperature and high temperature states and the design and construction of the test system.

The invention relates to a construction method and application of a rock crushing damage model, and belongs to the field of rock mass engineering. The problem that at least one of the quantitative change rules of damage under dynamic and static combined loading is difficult to reveal due to the fact that accuracy and reliability are insufficient when an existing rock damage model predicts the evolution rule and / or strength of macroscopic damage under dynamic and static combined loading is solved. The construction method comprises the following steps: S1, obtaining a tension damage model under quasi-static loading; s2, introducing a correction factor for correction; and S3, constructing a rock tension damage model under dynamic and static combined loading. According to the method, the dynamic tension damage evolution model under the dynamic and static combined loading condition is positively performed through mesoscopic tension crack propagation, so that the accuracy and reliability of the rock damage model in predicting the strength and / or evolution law of the rock under the dynamic and static combined loading are enhanced; the quantitative change rule of damage of the rock under dynamic and static combined loading and key factors influencing the rock damage process and strength are accurately disclosed.