9 results about "Design load" patented technology

The application belongs to the technical field of bridge construction, and is a beam bridge load test method based on time history curve. The method firstly carries out static load test, and then arranges test vehicles at key parts of the test bridge surface by using a step loading mode, and measures deflection points and strain points. Then, the static load test efficiency is calculated through the bridge static load test. According to the step loading mode and the static load test efficiency, a multi-working-condition bridge model is established by using a finite element method to collect time history curves. Finally, dynamic load test is carried out, control sections of each span of the bridge are selected as test sections, and strain fluctuation amplitude, impact coefficient and the like are measured through the dynamic load test. According to the test data, the stress state of the structure under dynamic load is analyzed. The application combines static load test and dynamic load test, can reflect the working performance of the bridge structure under design load, and has high reliability.

The present application relates to the technical field of high-temperature component creep fatigue test and life assessment, and particularly relates to a high-temperature structure deformation accumulation dynamic creep fatigue load design method under a peak regulation working condition. High-temperature creep performance, cyclic deformation performance, a target test temperature, a typical start-stop number or equivalent cycle number, a main load level range during steady operation, and basic parameters of stress / strain control capability of a testing machine of a target high-temperature structure or a sample thereof are obtained. A stress / strain hybrid control mode is used to generate a dynamic creep fatigue load waveform of the high-temperature structure or the sample thereof. When a dynamic creep fatigue load is executed on a creep fatigue testing machine and a cycle feature meets preset stability and repeatability criteria, the load design is determined to be effective. The present application is easy to implement on existing equipment: the designed load waveform can be realized through software control on a creep fatigue testing machine with stress / strain double closed loop and program loading function, without the need to increase additional hardware, and the engineering operability is strong.

This invention provides a method, equipment, and medium for predictive calculation of hanging basket structures based on multi-source data. It establishes a standardized parameter library by collecting hanging basket design parameters, actual processing data, and real-time on-site monitoring data. A complete structural mechanics model of the hanging basket is built, the overall structural stiffness matrix is ​​calculated, initial design loads are applied, and static equilibrium equations are solved. The structural stiffness matrix is ​​corrected using actual processing data, and the actual load vector is corrected using unloaded static data. Based on the corrected stiffness matrix and load vector, the structural mechanics equations are resolved, and deviations are calculated using construction dynamic data as constraints. If the deviation exceeds a threshold, the structural parameters are iteratively corrected, and the solution is re-solved and compared. This invention achieves high-precision simulation and real-time tracking of the hanging basket's stress state by integrating multi-source data from design, processing, and on-site data and introducing a dynamic correction mechanism, ultimately achieving precise control over structural safety and construction alignment.

The application discloses a wind turbine blade angle load output and analysis method and system, and belongs to the technical field of wind power. The method comprises the following steps: obtaining load calculation results, identifying coordinate systems, section information and working condition types; extracting load time series data of each section of each blade under extreme working conditions, calculating combined bending moments and azimuth angles; dividing the circumference of the blade into multiple preset angle intervals, and mapping the combined bending moments to the corresponding intervals according to the azimuth angles; establishing a corresponding relationship table of working condition names, section positions, angle intervals, blade numbers and combined bending moments, extracting load representative values of the same working condition group, the same section, the same angle interval and the same blade, and taking the maximum value as load data without a safety factor; performing safety factor correction according to the extreme working condition type to obtain load data with a safety factor; and comparing the load to be checked with design load to output an overall comparison result. The application realizes fine statistical comparison, is independent of Bladed software and saves resources.

The present invention discloses a construction method for a Wharf pier and abutment, comprising : leveling a foundation by distributing prefabricated concrete cushion blocks in a 2 ><2 m grid, applying 50%, 80% and 110% design loads by staged water injection and preloading, performing pressure stabilization and water level reduction, arranging a three-dimensional coordinate control network with a plane position deviation of S3 mm to realize accurate positioning, connecting a reinforcement cage by a pre—embedded short positioning bar, mounting a sealed composite steel formwork With vertical and horizontal stiffening ribs, matching 50 cm thickness of each layer with a combined vibration technology when layered pouring is carried out, and keeping curing of a top formwork after reaching 70% of strength. The method improves bearing uniformity, positioning accuracy and the concrete compactness degree, is applied to pier and abutment construction of hydraulic structures, and can ensure structural integrity and durability.

The application discloses a kind of based on the horizontal bearing characteristic evaluation method of correction p-y curve spiral steel pile, comprising: obtaining in-situ static sounding test data and pile body design parameter, and establish the initial p-y curve of eliminating the experience dependence of soil body;Determine the influence area of spiral plate horizontal load, and introduce amplification factor in the influence area to the initial p-y curve in the pile around soil resistance is corrected;Based on the elastic foundation beam theory, establish finite difference equation group and iteratively solve the horizontal displacement of pile body;Further determine the angle of pile body, bending moment, shear force and the distribution of pile around soil resistance, draw the horizontal load-displacement curve of spiral steel pile, compared with design load to obtain horizontal bearing characteristic evaluation conclusion.The application uses in-situ static sounding test data to replace traditional experience parameter, and is combined based on the geometric parameter of pile body, realizes the objective, standardization evaluation of spiral steel pile horizontal bearing characteristic.

This invention belongs to the field of flexible body aircraft technology, specifically relating to a static strength equivalent loading test method for lightweight wings. The test method includes aerodynamic load calculation; load zoning and equivalent calculation; test bench installation and clamping; equivalent loading of counterweights; static strength and bending / torsional stiffness measurement; and test result recording. By designing the mass and distribution of the loading counterweights in corresponding areas, the method ensures that the weight, center of mass position, and resultant moment of the loaded counterweights are consistent with the concentrated force, load center of gravity, and resultant moment of the aerodynamic loads, thus solving the problem that traditional test methods cannot accurately simulate the distribution of real aerodynamic loads. The above test method utilizes a flexible wing static strength test bench to solve the problem of static strength and stiffness testing of strut-and-rope reinforced flexible wing structures. By changing the height of the support beam, it achieves the static strength and stiffness testing function of flexible wings under variable stiffness. Through a flexible loading counterweight module, it achieves high-precision equivalence between the loaded counterweights and the design load.

The present application relates to the technical field of bridge engineering, specifically to a UHPC-steel box composite beam bridge prestress system design method, comprising: obtaining bridge design geometry and material parameters, constructing a refined finite element model containing steel box beam and UHPC layer units and defining the interface connection relationship; applying design load for simulation analysis, extracting the longitudinal normal stress distribution of the UHPC layer on the top of the steel box beam upper flange, and identifying the tensile area exceeding the UHPC tensile strength; arranging the prestress beam initial path along the longitudinal direction in the tensile area to ensure that the pre-compressive stress covers the tensile area; establishing a coupling analysis model of the steel box beam, UHPC layer and prestress beam unit, defining the prestress beam as a tensile rod unit only and connecting it with the UHPC layer through the coupling node, and finally determining the prestress system design. This method can accurately match the structural stress demand and improve the reliability of the prestress system.

The application relates to a construction method for adding and modifying a self-flow device of a ship, and belongs to the technical field of ships. The method comprises the following steps: determining the installation position of the self-flow device on the ship body according to the functional requirements of the self-flow device and the structural strength of the ship body; demarcating a to-be-cut region on the ship body with the installation position as the center; separating the to-be-cut region from the ship body to form a ship body segment; completing the manufacturing and installation of the self-flow device on the outer surface of the ship body segment in a workshop meeting the construction environment; and re-docking and welding the ship body segment integrated with the self-flow device to ensure that the ship body structure is restored to the original design load standard. The modular construction system of the application successfully solves the problems that the traditional shipbuilding construction cannot meet the high construction condition requirements and high precision forming requirements of the self-flow device, can significantly improve the construction environment, construction space and posture of the self-flow device manufacturing, reduces the construction difficulty, improves the profile precision of the self-flow device, and improves the applicability of the self-flow device to the ship.