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251 results about "Static loading" patented technology

A static load is a mechanical force applied slowly to an assembly or object. This can be contrasted with a dynamic load, which is a force that is applied rapidly.

Three-dimensional simulation design method and system based on elevator structure

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.
Owner:JIANGXI RHINE ELEVATOR CO LTD

Catapult take-off and arrested impact test apparatus

PCT designated stage expiredWO2025123566A1Vibration testingShock testingServo actuatorAccelerometer
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.
Owner:TIANJIN AEROSPACE RELIA TECH +1

True triaxial dynamic disturbance test device for deep-buried hard rock

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.
Owner:NORTHEASTERN UNIV CHINA

Method for reinforcing mined-out side concrete wall of coal pillar in mining section

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.
Owner:SHANXI HUIAN YONGTAI MINING TECH CO LTD

Fatigue test method for energy storage spring and special auxiliary device

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.
Owner:STATE GRID HUBEI ELECTRIC POWER RES INST +1

Plane local loading quasi-static loading system and loading method thereof

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.
Owner:HARBIN INST OF TECH

Testing method of bridge deck slab dry joint connection structure

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.
Owner:TONGJI UNIV

Method for accurately evaluating bearing capacity of bridge

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.
Owner:HUNAN LINXI CONSTRUCTION ENGINEERING CO LTD

Fan blade vibration stress calculation method and device, electronic equipment and storage medium

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.
Owner:AECC HUNAN AVIATION POWERPLANT RES INST

Static load pressure test equipment for step stool

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.
Owner:GUANGZHOU HENLEE SAFETY TEST TECH +1

Failure safety topological optimization design method under dynamic load

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.
Owner:HUNAN UNIV

Test system and method for simulating cycle performance evolution of soft soil jacket pile foundation

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.
Owner:GD POWER DEVELOPMENT CO LTD +2

Cement mixing pile single-pile composite foundation static load test device and method

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.
Owner:CCCC SECOND PUBLIC BUREAU FOURTH ENG CO LTD

Brace with resistance band

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.
Owner:LOCKART BRICE W

Pure bending stress simulation-sound load-vibration combined loading test device

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.
Owner:CHINA AIRPLANT STRENGTH RES INST

Large-stroke aircraft airfoil static force loading system for aircraft strength test

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.
Owner:SHAANXI HENGBO AVIATION TECH CO LTD

Large-scale wind power blade fatigue test load calculation method considering pre-bending and geometric nonlinearity

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.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY

Prediction system for static pressure method prestressed concrete pile bearing capacity and implementation method thereof

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.
Owner:ZHEJIANG GUANGSHA COLLEGE OF APPLIED CONSTRTECH

Truck bogie side frame / swing bolster CAD / CAE (computer-aided design / computer-aided engineering) integration method and system

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.
Owner:JINXI RAILWAY VEHICLE CO LTD +1

Device for testing sliding friction resistance under action of high-temperature hot air

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.
Owner:TIANJIN AEROSPACE RELIA TECH +1

Deep sea simulation test device for dynamic and static loading process

The invention belongs to the technical field of metal material stress corrosion test, and relates to a deep sea simulation test device for dynamic and static loading process, the main structure of the deep sea simulation test device comprises a pressure-resistant test cabin, and a loading sample piece, a pressure-resistant reference electrode and an annular auxiliary electrode arranged in the pressure-resistant test cabin, the loading sample piece is completely arranged in the pressure-resistant test cabin, and the annular auxiliary electrode is arranged in the pressure-resistant reference electrode. An adapter is connected with a dynamic and static loading system after penetrating through a cabin to perform static or dynamic stress loading, a pressure-resistant electrochemical test system is adopted to perform electrochemical characterization, test or polarization potential application, and a multi-factor control system is adopted to control main deep sea environmental factors such as temperature, pressure and dissolved oxygen content. High-precision and high-reliability test data can be quickly obtained, and corrosion electrochemical behaviors in stress corrosion and corrosion fatigue processes of metal materials in a deep sea simulation environment can be more truly reflected; the method provides support for metal material in-situ slow strain rate stress corrosion and corrosion fatigue test in a deep sea simulation environment and electrochemical test and characterization in the process.
Owner:CHINA SHIPBUILDING INDUSTRY CORPORATION NO725 RESEARCH INSTITUTE

Gob-side entry driving small coal pillar dilatation deformation test system and method under simulation of dynamic and static loads

The invention relates to a gob-side entry driving small coal pillar dilatation deformation test system and method under simulation of dynamic and static loads, and belongs to the technical field of coal pillar dilatation deformation test. The system comprises a bearing frame unit, an axial pressure loading unit, a constraint frame unit, an impact loading unit, a monitoring unit and a controller, the axial pressure loading unit is arranged at the bottom of the bearing frame unit, the constraint frame unit is arranged on the upper side of the axial pressure loading unit, and the impact loading unit is arranged at the top of the bearing frame unit. The bearing frame unit is provided with a monitoring unit, the monitoring unit is connected with a data collector, and the data collector, the axial pressure loading unit and the impact loading unit are all connected with a controller. Different rotation angles of the gob-side entry driving lateral top plate are simulated, independent or synchronous application of the gradient load and the impact load on the top of the coal sample is realized in the axial direction, the test operation is simple, and the test accuracy is high.
Owner:SHANDONG UNIV OF SCI & TECH

A full life cycle test method for dynamic performance of ballastless track embedded structural concrete

The present invention discloses a full-lifecycle dynamic performance test method for embedded concrete structures of ballastless track. The method comprises the following steps: 1) preparing embedded concrete specimens in proportion to the actual dimensions of the bi-block ballastless track; 2) subjecting the specimens to static loading and measuring their ultimate strength; 3) developing fatigue or impact dynamic tests to determine the dynamic failure life and dynamic shear cracking life of the specimens; 4) determining a repair system based on the life ratio of the dynamic shear cracking life to the dynamic failure life; and 5) performing grouting repairs after shear cracking of the specimens, followed by fatigue or impact dynamic tests to estimate the life attenuation rate and service life of the bi-block ballastless track structure. The present invention employs specimens that accurately reflect the embedded structure of the bi-block ballastless track and develops a dynamic test system that is more consistent with actual service conditions, providing a method for evaluating the service life of ballastless track, determining a repair system, and selecting repair materials.
Owner:RAILWAY CONSTR RES INST OF CHINA ACAD OF RAILWAY SCI CO LTD +1

A three-dimensional simulation design method and system based on elevator structure

The present invention relates to the field of mechanical engineering technology, and in particular to a three-dimensional simulation design method and system based on an elevator structure. The method comprises the following steps: obtaining an elevator structure drawing; constructing a three-dimensional elevator assembly according to the elevator structure drawing; simulating a car static load according to the three-dimensional elevator assembly to obtain car static load data; detecting the car structure strength based on the car static load data; evaluating welding defects based on the car structure strength to generate welding defect data; identifying weld weak areas according to the welding defect data; determining the amount of car structure wear based on the weld weak areas; predicting the risk of car floor fracture according to the wear of the car structure; performing welding optimization design based on the risk of car floor fracture to obtain welding optimization design data; and performing traction simulation according to the three-dimensional elevator assembly to obtain traction data. The present invention improves the safety and stability of the elevator structure based on mechanical engineering technology, and significantly improves the design accuracy and efficiency.
Owner:JIANGXI RHINE ELEVATOR CO LTD

Automatic leveling detachable steel casing device for single-pile bearing capacity test

The utility model relates to an automatic-leveling detachable steel casing device for a single-pile bearing capacity test. The automatic leveling detachable single pile bearing capacity test steel casing device comprises a steel casing arranged outside the top of a single pile in a sleeving mode. The top end of the steel casing is higher than that of the single pile; an annular pouring cavity is formed between the inner wall of the steel casing and the side face of the top of the single column. And a disc-shaped pouring cavity is arranged in the steel casing and above the single pile. According to the utility model, a concrete pouring object can be provided in a pouring manner; the top surface of the concrete pouring object is automatically leveled and is used as a force application surface, so that a loading counter-force system of the static load tester can apply force conveniently; the bottom of the concrete pouring object wraps the top end of the single pile to protect the single pile; and the steel casing can be drawn out after being poured and can be recycled.
Owner:CHINA CONSTR SENVENTH ENG BUREAU INSTALLATION ENG

Method for characterizing the vibration damping of a contact between two components

PendingCN122319354AAdhesiveClassical mechanics
One aspect of the invention relates to a test specimen (100) for characterizing vibration damping in adhesive or sliding contact between two components subjected to vibration, low-cycle, and tribological stress, wherein the specimen is provided with male and female fasteners (130) comprising a protrusion (131) extending from a free end of a first longitudinal rod and a recess (132) recessed at a free end of a second longitudinal rod. A second aspect of the invention relates to an apparatus (300) for characterizing vibration damping in adhesive or sliding contact between two components subjected to vibration, low-cycle, and tribological stress, wherein the apparatus is provided with a test bench (300) on which the test specimen (100) is mounted, and wherein the apparatus includes a vibrator (310) for transmitting vibrational excitation to the test specimen (100) and a static loading device (320) for transmitting low-cycle stress to the test specimen. A third aspect of the invention relates to a method (400) for implementing the characterization apparatus (300).
Owner:SAFRAN HELICOPTER ENGINES

Method for testing compressive static load of single pile of poured bearing platform and bottom plate

The invention discloses a method for testing compressive static load of a single pile of a cast bearing platform and a cast bottom plate, which comprises the following steps of: 1) chiseling a circle of concrete, close to the bearing platform, of the bottom plate, and cutting off longitudinal reinforcing steel bars and transverse reinforcing steel bars anchored with the bearing platform in a reinforcing mesh of the bottom plate; (2) a static load test device is arranged, and a compression resistance static load test is carried out; (3) a plurality of outer ring grooves and inner ring grooves are dug in the side face of the circle of bottom plate and the side face of the bearing platform, and an annular water swelling strip is fixed to each ring groove; a plurality of grouting anchor sleeves with grouting holes are adopted to be connected with all longitudinal steel bars and transverse steel bars in the bottom plate steel bar mesh cut off in the first step in a one-to-one correspondence mode; (4) a circle of inner ring grouting annular pipe is pre-buried at the bottom of the side face of the bearing platform; a circle of outer ring grouting annular pipe is pre-buried at the bottom of the side face of the bottom plate; and (5) concrete, close to the bearing platform, of the bottom plate is poured again. According to the method, the workload is greatly reduced, and the structural strength and good waterproof performance can be ensured.
Owner:NINGBO CONSTR ENG GROUP

Application management method and device, electronic equipment and computer readable storage medium

The embodiment of the invention discloses an application management method and device, electronic equipment and a computer readable storage medium, and belongs to the technical field of application management.According to the embodiment of the invention, a dynamic loading path and a static loading path of a target application are obtained, and the static loading path and the dynamic loading path are fused; according to the embodiment of the invention, the target loading path of the target application is obtained, and the compressed file of the target application can be decompressed according to the target loading path in response to the starting instruction of the target application. Thus, by optimizing the loading path of the target application, the optimized target loading path can better adapt to the actual use scene of the target application, and meanwhile, the compressed file of the target application can be decompressed more efficiently and reasonably, so that the starting delay of the target application is effectively reduced, and the use experience of a user is improved.
Owner:SHENZHEN TCL NEW-TECH CO LTD

A method for evaluating multi-directional coupling bearing capacity of suction bucket foundation considering associated plastic flow of marine clay

The present application relates to a kind of suction bucket foundation multidirectional coupling bearing capacity evaluation method considering associated plastic flow of marine clay.The method is based on the associated flow characteristics of undrained clay plastic material,firstly, the numerical model of static loading of suction bucket foundation in undrained clay is established;Secondly, by displacement probe method, the bearing capacity of foundation under different proportional displacement loading is obtained;Finally, based on the rule of associated plastic flow, the same as the outer normal of bearing capacity envelope surface and displacement increment direction vector is used as the criterion, the bearing capacity envelope surface of suction bucket foundation (i.e. the maximum bearing capacity of foundation under multidirectional coupling load) is determined.Compared with prior art, the present application has the effect of considering the associated plastic flow of undrained clay plastic material, the method has clear physical meaning and is easy to implement, and can solve the problem that the existing model cannot accurately evaluate the bearing capacity envelope surface.
Owner:POWERCHINA HUADONG ENG CORP LTD