10results about How to "Reduce modeling time" patented technology

This invention provides a method for simulating buckling of subsea pipelines based on the pipeline element method, addressing the problems of low computational efficiency, complex modeling, and low accuracy in existing methods. Based on Euler-Bernoulli beam theory, this invention models the pipeline as a series of efficient pipeline elements. Internal pressure is converted into equivalent temperature rise, and the effective thermal expansion force generated by the effective temperature rise is applied to both ends of the pipeline element to construct the total potential energy equation. The second derivative of the total potential energy equation is performed to obtain the tangent stiffness matrix of the pipeline element. An updated Lagrange method is used for coordinate transformation. The secant relationship is used to calculate the pipeline element and soil resistance. A Newton-Raphson incremental-iterative numerical program is established to perform nonlinear analysis of the pipeline, progressively solving for the deformation and stress of the pipeline under complex loads. This invention significantly reduces the number of elements, improves computational efficiency, and accurately simulates nonlinear pipe-soil interactions. It is applicable to various pipelines, including short pipes, long pipes, and corroded pipes, as well as complex working conditions such as high temperature and high pressure.

The application discloses a kind of quick establishment systems of large aperture spliced telescope mirror numerical control processing model, including mirror design module, accurate coordinate calculation module, parameterized drive modeling module and check and confirmation module.Mirror design module is used to define the multi-level coordinate system of main mirror coordinate system, mirror assembly body coordinate system, edge sensor coordinate system and edge sensor slot coordinate system, and define optical surface curve equation, back spherical surface structure, outer contour and mirror gap geometric rule;Accurate coordinate calculation module is calculated according to the coordinate system and geometric rule, and the accurate coordinate point data of mirror is batch calculated;Parameterized drive modeling module generates three-dimensional solid model;Check and confirmation module is used to verify the accuracy of coordinate calculation result and the compliance of three-dimensional model to optical common surface, edge sensor interface slot coplanar and other design principles.The application can realize the batch automation modeling and quick iteration of telescope spliced mirror surface mirror, and improves modeling efficiency and precision.

The invention relates to the technical field of satellite navigation detection, in particular to a power transmission line observation environment error calibration method, system and device and a medium, and the method comprises the steps: collecting the original monitoring data of each satellite navigation system for a power transmission line; calculating an ionosphere-free combined residual error according to the original monitoring data of each satellite navigation system; establishing a target grid according to the position of the observation station antenna and the satellite observation angle, projecting the ionosphere-free combination residual error to the target grid according to the satellite observation angle of the observation station antenna, and establishing an ionosphere-free combination model according to a projection result; and calibrating the observation environment error of the power transmission line by using the ionosphere-free combination model. Therefore, the problems of limited applicability, insufficient representation capability of observation environment errors, relatively low error modeling accuracy and the like during processing of multi-system observation data in related technologies are solved.

This invention relates to a method for establishing a microscopic geometric model of particle-reinforced composite materials, comprising: determining the three-dimensional spatial range of particle movement; determining the target volume and volume growth rate of different particles; determining the number of different particles within the three-dimensional spatial range; randomly selecting the initial position of each particle and determining the initial volume of each particle; using the LJ potential function to determine the interaction force between particles at the current moment; determining the current velocity and direction of each particle based on the interaction force between particles at the current moment; obtaining the volume of each particle at the next moment based on the current volume and volume growth rate of each particle; obtaining the position of each particle at the next moment based on the current position and the current velocity and direction of each particle; repeating the above steps until each particle is uniformly distributed within the three-dimensional spatial range and the target volume is reached. This invention can rapidly construct a geometric model that reflects the small reinforcing components and high particle filling ratio of the material.

The invention relates to a construction method of a valve flow conductance model and an application method of the valve flow conductance model.The construction method of the valve flow conductance model comprises the steps that multi-dimensional valve data are obtained, the multi-dimensional valve data are processed through feature engineering to obtain target features, the multi-dimensional valve data comprise the air pressure and the valve opening degree, and the target features comprise the air pressure and the valve opening degree; the target characteristics comprise air pressure and air pressure standard deviation in a preset time period; obtaining a preset mapping relation among an air pressure range, an air pressure standard deviation range and working conditions, and determining the working condition corresponding to the target feature according to the mapping relation, the air pressure and the air pressure standard deviation; and training a gradient boosting decision tree algorithm by taking the target feature data under each working condition as input data and taking the valve predicted opening degree as output data to obtain a valve conductance model of the corresponding working condition, and the valve conductance models are in one-to-one correspondence with the working conditions.

The embodiment of the invention provides a fissure connectivity modeling method and device based on surrounding rock fissure JRC, and the method comprises the steps: building a fissure quantitative analysis model based on a fissure image obtained through borehole imaging, and describing the geometric morphology of a fissure through a sine curve; fitting the fracture quantitative analysis model, and extracting characteristic parameters representing the geometrical morphology of the fracture; calculating a roughness coefficient JRC of the fracture surface based on the characteristic parameters, and representing the fracture as a fracture plane equation in a three-dimensional space through coordinate transformation; establishing an extension length probability model of the crack based on the JRC and the crack plane equation; and for any two fractures from different drill holes, calculating a spatial intersection line according to respective plane equations, and then calculating a connectivity probability along the intersection line based on an extension length probability model to complete quantitative modeling of fracture connectivity. According to the method, the fracture connectivity probability criterion is established by combining the fracture roughness coefficient JRC with the geometric parameters, and quantitative evaluation of the fracture connectivity is achieved.

This invention relates to the technical field of aerospace structural design, and provides an intelligent lightweight design method for rudder components based on multi-objective collaborative optimization. The method includes parametric modeling, establishing an automated aerodynamic simulation process, constructing an aerodynamic performance dataset, building a CNN aerodynamic surrogate model, and multi-objective optimization using the NSGA-II algorithm. By constructing a parameter-driven automated modeling framework, key geometric features of the components are defined as design parameters, achieving parametric representation and automatic generation of the geometric model. Through the constructed CNN aerodynamic surrogate model, the aerodynamic performance can be predicted quickly and accurately based on the input component geometric parameters. By constructing a multi-objective collaborative optimization method that integrates the CNN aerodynamic surrogate model and the NSGA-II algorithm, intelligent lightweight design of aerospace rudder components is achieved, resolving the rigid contradiction between "extreme lightweighting and high aerodynamic efficiency" in traditional design, and meeting the design requirements of rapid iteration of new aerospace equipment.

The invention relates to the technical field of intelligent substation relay protection, and discloses a relay protection service model automatic construction and virtual loop generation method, system, device and medium, and the method comprises the steps: obtaining a substation configuration file and a primary system diagram, carrying out the data analysis, and constructing a unified data model; constructing a graph database model according to the node type set and the edge relation type set to realize node instantiation and relation linking; a two-stage strategy combining rule deduction and graph neural network intelligent completion is adopted to carry out virtual loop automatic generation and completion, and a complete virtual loop connection relation is obtained; the virtual loop connection relation is visually displayed, and hierarchical navigation and viewing based on voltage grades, wiring modes and intervals are supported. According to the method, the modeling time and the error probability are greatly reduced, and the generated business model and the visual display thereof provide a solid and reliable model basis for subsequent protection logic verification, intelligent operation and maintenance and digital twinning application.

The application discloses a three-dimensional model picture matching method and system for disease identification, and belongs to the technical field of three-dimensional model construction. The system is used for realizing the method. The method comprises the following steps: acquiring two groups of picture data of the same object, namely picture data A and B. The resolution of the picture data A is higher than that of the picture data B. Distortion correction is performed on the picture data A and B. Image matching is performed on the non-distortion picture A and the non-distortion picture B. A three-dimensional model and a camera perspective projection model are constructed based on the picture data B. A depth map is constructed based on the three-dimensional model and the camera perspective projection model of the picture data B. The non-distortion picture B is mapped onto a model texture through the camera perspective projection model and the depth map. The non-distortion picture A is used to replace the content of the non-distortion picture B, and the content of the non-distortion picture B is hidden. The application can reduce the data amount when three-dimensional modeling is performed through high-quality pictures, and reduce the modeling time.

The invention discloses an automatic model generation method for an SLM forming shape control process rib plate structure. The automatic model generation method comprises the steps that a datum curve of a rib plate to be generated is marked; parameters of the rib plate are set; based on the reference curve, a rib plate body model is generated in combination with set rib plate parameters; parameters of the separation holes are set; based on the reference curve, a sphere model is generated in combination with set separation hole parameters; according to the rib plate body model and the sphere model, Boolean subtraction is carried out, and a final rib plate model with separation holes is obtained. According to the method, one-button type generation of the rib plate type process structure can be achieved, the modeling duration of the rib plate type process structure is greatly shortened, multiple types of selectable rib plate type process structure generation modes can be provided, flexible selection can be achieved according to product structure characteristics and forming requirements, and parameters are controllable and adjustable; a series of problems of an existing modeling method based on boundary representation in SLM forming process structure design are solved.