11 results about "Loading rate" patented technology

The application discloses a reinforced concrete beam bending stiffness dynamic evaluation detection method, and particularly relates to the stiffness detection test field, which comprises the following steps: S1, arrangement processing, pretreatment of the test piece and arrangement of the support; S2, loading processing, a loading system and a monitoring module; S3, setting processing; S4, grading processing, grading stable loading and real-time collection of dynamic data; S5, correction; S6, calculation processing; S7, verification, verification of the stiffness stability and drawing of a three-dimensional dynamic evaluation atlas; and S8, detection report processing. The application precisely sets and strictly adapts the loading rate, the deviation allowable value and the load regression time to the environmental temperature, dynamically adjusts the allowable range of the load fluctuation, effectively suppresses the temperature sensitivity of the hydraulic system, achieves higher evaluation detection precision, and solves the problems of unstable loading rate, intensified load fluctuation and difficult achievement of higher evaluation detection precision.

This invention proposes a method for testing the compressive strength of carbonized seawater sand concrete, comprising: preparing seawater sand concrete specimens and carbonizing them until fully carbonized; preloading and then unloading the specimens on a testing machine, followed by displacement-controlled loading; collecting data through strain gauges during the ascending phase, and switching to a displacement extensometer to collect deformation during the descending phase when the load reaches 70-80% of the peak load, while simultaneously reducing the loading rate until the specimen is completely destroyed; performing dimensionless processing on the two data segments, and using a two-segment model of polynomial ascending phase and rational fractional descending phase for least squares fitting to construct a full-curve constitutive relationship, effectively solving the data discontinuity problem caused by strain gauge detachment during the descending phase of highly brittle materials; the obtained model has a high goodness of fit and the physical meaning of the parameters is clear.

The invention discloses a buried pipeline visual test system and method for simulating a differential load effect, and belongs to the technical field of geotechnical engineering. The soil body model is filled in the test soil body container, and a test pipeline model is buried in the soil body model; the difference loading device is fixed above the upper sealing cover of the test soil body container, the difference loading device comprises a first servo electric cylinder and a second servo electric cylinder, and loading rods of the first servo electric cylinder and the second servo electric cylinder penetrate through a preset hole channel of the upper sealing cover to act on the lower soil body and the test pipeline model; the first servo electric cylinder and the second servo electric cylinder are different in specification, and the loading rate is independent and controllable; and the monitoring and data acquisition system comprises a stress sensor, a strain sensor and a pore water pressure sensor which are buried in the soil body model, and a pressure sensor and a displacement sensor which are arranged around the test pipeline model. According to the invention, the actual stress condition of the buried pipeline in the actual working condition can be better simulated.

This invention discloses a dust-proof coal mine conveying equipment and its usage method. The method constructs a multiphase microstructure model of recycled aggregate, couples the discrete element method with a particle crushing algorithm, simulates the crack propagation and crushing evolution law of recycled aggregate during the crushing process, and establishes a quantitative correlation between aggregate strength and microstructure parameters based on the simulation results. This invention introduces a real-time crushing energy feedback mechanism and a multi-objective optimization algorithm to synergistically optimize aggregate gradation, loading rate and boundary conditions, thereby improving simulation accuracy and computational efficiency, and achieving accurate prediction of the crushing strength and crushing morphology of recycled aggregate.

This invention relates to the field of dry quenching coke calculation technology, and particularly to a method for calculating the coke discharge rate and coke loading rate of dry quenching coke. The method includes data acquisition and processing; identifying the loading cycle; calculating the average coke loading amount for each loading cycle; grouping the data based on the loading cycle and calculating the average amplitude of the loading cycle; constructing an amplitude-coke discharge rate prediction model; calculating the total material mass within the dry quenched coke based on the coke level, and calculating the coke loading rate by combining the coke discharge rate with the change in material mass. The advantages of this invention are: it eliminates excessive reliance on real-time belt scale data; by combining long-term historical data for statistical analysis and introducing precise calculation of the coke loading amount, it significantly reduces the interference caused by instantaneous operating condition fluctuations, equipment errors, and "suspended material" phenomena on the coke discharge rate calculation; and by using statistical averaging and multi-cycle fitting methods, it makes the correspondence between amplitude and coke discharge rate more stable and reliable, improving the overall calculation accuracy and robustness.

The invention discloses a sand shale interbed crack formation mechanism and evolution mode analysis method, which comprises the following steps of: setting a reasonable rock sample loading rate and shortening rate by using a particle flow numerical simulation technology according to a macroscopic structure style, and further implementing a rock mechanics experiment with a variable loading rate; the fracture strength and stress-strain evolution maps of sand / mudstone under different loading rate conditions are constructed, so that a sand / mudstone interbed fracture development mechanism under a strong stress rapid extrusion environment is disclosed, an interbed type artificial sample is prepared by using an underground sand / mudstone core sample from the similar perspective of three aspects of material composition, mechanical properties and an interbed structure, and the interbed type artificial sample is used for detecting the interbed fracture of the sand / mudstone. A loading type synchronous CT scanning experiment and a three-dimensional acoustic emission source positioning experiment are carried out, the rock fracture process is visualized, and the composite rock mass fracture evolution process is revealed. The method has important theoretical and practical values for improving the exploration success rate of the fractured gas reservoir, widening the exploration and development field and optimizing the reservoir transformation strategy.

The invention discloses a method for testing the crack resistance of a prefabricated curved plate of a thin-wall concrete irrigation canal. The method comprises the following steps: measuring key dimension parameters of the prefabricated concrete curved plate; building a three-point bending test loading platform; performing stress state classification on the prefabricated curved plates according to the position of the action point of the resultant force of the water pressure; calculating a horizontal positioning parameter of a load acting point and a base supporting height parameter, and completing positioning of loading and supporting; calculating a loading maximum value based on a bidirectional load synthesis effect, and applying the load according to a set loading rate; calculating a fatigue lower limit equivalent value under the action of a bidirectional load, and implementing multi-cycle fatigue loading; after the loading is stopped, the cracking or damage state of the prefabricated concrete curved plate is observed, the crack width is detected, and an anti-cracking performance evaluation conclusion is given in combination with standard requirements. According to the method, the synthetic action of water pressure, top pressure beams and live loads in different directions in actual loads is comprehensively considered, and the crack resistance of the prefabricated bent plates of different sizes is accurately and directly evaluated.

This invention relates to the field of intelligent loading technology for power materials, specifically disclosing a multi-dimensional physical constraint-based loss-prevention loading method for power materials based on industrial big data. The method includes: responding to a loading request by acquiring associated industrial big data, which at least includes power material data, transport vehicle data, and cross-regional road condition data; based on the industrial big data, constructing a material object model and a vehicle object model containing geometric and physical attributes, and generating an initial candidate loading queue. This invention achieves comprehensive control from geometric boundaries to dynamic mechanics by constructing a multi-dimensional physical constraint hierarchical verification mechanism. Specifically, it utilizes dynamic overturning compensation logic to intelligently identify the hidden instability risks of high-center-of-gravity materials without reducing the overall loading rate, and eliminates overturning hazards through virtual grouping and binding technology, effectively resolving the contradiction between dynamic safety and loading efficiency for high-center-of-gravity materials.

The present application relates to natural gas hydrate mechanics test technical field, especially to a kind of hydrate-bearing sediment strain control continuous loading consolidation experiment device and method.The present application includes constant-temperature gas bath cabinet, consolidation test machine, consolidation reactor, counter-pressure module and gas recovery module, the consolidation test machine includes counter-force frame and loading mechanism, loading mechanism is installed at the bottom of counter-force frame, consolidation reactor is arranged on loading mechanism, consolidation test machine and consolidation reactor are located in constant-temperature gas bath cabinet, counter-pressure module and gas recovery module are connected with consolidation reactor respectively.By strain control continuous loading, the consolidation experiment period of hydrate-bearing sediment is shortened, by controlling sample bottom completely not draining water, only draining water from top single side, and cooperating with appropriate loading rate control bottom hole pressure variation, ensure that no excessive hydraulic gradient is generated in sample to cause sample damage, realize the purpose of quickly obtaining reliable hydrate-bearing sediment compressibility index.

The invention provides a concrete compressive strength self-compensation loading method and equipment. The method comprises the following steps: acquiring z-axis morphology data of a pressure-bearing surface of a test block; obtaining a stress concentration coefficient Kt by using a deep learning model; the loading rate is controlled in a segmented mode according to the Kt value; and calculating the compensation intensity. According to the method, any physical leveling is not needed, and identification-compensation-loading can be rapidly completed; compared with a conventional result, the method has the advantages that small detection strength or dispersion caused by surface defects such as burrs on a pressure-bearing surface of the test block is reduced; the device can be embedded into an existing electro-hydraulic servo press, and the hardware transformation cost is low; 10 thousand yuan per machine. On the premise of not changing the original state of the test piece, the stress concentration coefficient Kt of the pressure-bearing surface is predicted by using the AI, and the loading curve and the strength calculation formula are adjusted in real time, so that the detection strength error caused by the defects of the pressure-bearing surface can be reduced.

The invention relates to the technical field of engineering machinery, and discloses a loading weight intelligent control method and device.The method comprises the steps that the loading rated weight of transportation equipment, the current loading weight of the transportation equipment and the single bucket rated weight corresponding to a loading machine are obtained; according to the loading rated weight and the current loading weight, the to-be-loaded weight is calculated; judging whether the to-be-loaded weight is smaller than the rated weight of a single bucket; when it is judged that the weight of the to-be-loaded vehicle is smaller than the rated weight of the single bucket, the target overturning angle needed by the bucket is calculated according to the weight of the to-be-loaded vehicle; and after the bucket is controlled to complete material shoveling operation for the target material, the bucket is controlled to execute bucket tipping operation according to the target overturning angle, so that the material weight of the target material in the bucket is adjusted to be consistent with the weight of the to-be-loaded vehicle. It can be seen that the weight of the last hopper of materials in the loading process can be accurately and efficiently adjusted, the loading weight control efficiency and accuracy are improved, and therefore the loading operation efficiency is improved.