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123 results about "Geometric design" patented technology

Geometric design (GD) is a branch of computational geometry. It deals with the construction and representation of free-form curves, surfaces, or volumes and is closely related to geometric modeling. Core problems are curve and surface modelling and representation. GD studies especially the construction and manipulation of curves and surfaces given by a set of points using polynomial, rational, piecewise polynomial, or piecewise rational methods. The most important instruments here are parametric curves and parametric surfaces, such as Bézier curves, spline curves and surfaces. An important non-parametric approach is the level-set method.

Complex part molded line optimization design method based on multi-field node feature weighted aggregation

The invention discloses a complex part molded line optimization design method based on multi-field node feature weighted aggregation. Comprising the following steps: firstly, performing finite element batch simulation according to a geometric design variable, a temperature and a contact surface friction coefficient of a to-be-optimized complex part molded line to obtain a training data set; then, constructing a depth map sampling aggregation neural network fusing space and temperature attention, then training the depth map sampling aggregation neural network fusing space and temperature attention by using the training data set, and obtaining a stress prediction model after training is completed; and finally, in combination with the stress prediction model, performing iterative optimization by taking minimization of the maximum equivalent stress of the complex part as an optimization target, and obtaining the optimal geometric parameters of the molded line of the current complex part in the target temperature interval. According to the method, rapid reconstruction of the stress distribution state of the complex part is achieved, the optimization speed is increased, meanwhile, the precision of an optimization result is fully guaranteed, and meanwhile calculation resources are greatly saved.
Owner:ZHEJIANG UNIV

Blade curved surface global consistent geometric design method based on PHT spline

The invention relates to a blade-like curved surface global consistent geometric design method based on a PHT spline, and the method comprises the steps: carrying out the high-precision fitting of a blade-like complex curved surface and the geometric features of the blade-like complex curved surface through employing a PHT-spline curved surface. According to the main technical scheme, the method comprises the following steps: splicing and cutting a parameter domain into a globally consistent complete single parameter domain as a definition domain of a PHT spline through a boundary consistency re-parameterization process; geometric features and boundary information are comprehensively considered, a to-be-fitted data point set is obtained through reasonable sampling, and corresponding high-order geometric information is calculated; and performing high-precision fitting by controlling hierarchical subdivision of a grid to obtain a blade curved surface represented based on a PHT spline. According to the method, the problem of discontinuity caused by cutting and splicing in a traditional design method is solved, the global consistency of the overall design is ensured, and meanwhile, the design precision and efficiency are improved.
Owner:UNIV OF SCI & TECH OF CHINA

Full-variable optimized B-spline geometric distance fitting method

The invention discloses a full-variable optimized B-spline geometric distance fitting method, belongs to the field of computer-aided geometric design, and is suitable for solving the problem of high-precision modeling of complex curves in industrial design and precision manufacturing scenes. According to the method, variables are initialized for a set of given data points; constructing a target function of geometric distance fitting, solving update quantities of control points and nodes through a Gauss-Newton algorithm, and normalizing node vectors; approaching projection points of the data points by using first-order approximation to update parameters; and checking a convergence index of alternate iteration to obtain a final B-spline curve. Compared with the prior art, the method has the advantages that the fitting precision is remarkably improved, the problem that in the prior art, a dependent variable coupling relation is complex and global optimization is difficult is solved, and particularly when data points containing sharp features are processed, a B-spline curve with heavy nodes can be automatically generated, geometric features can be better described, and fitting errors are reduced.
Owner:ZHEJIANG UNIV

SYSTEM AND METHOD FOR VEHICLE DECISION AND MOTION PLANNING USING REAL-TIME MIXED integers

A vehicle is controlled for travel on a road having a geometric design defined by one or a combination of a docking line, a cross-section, and a cross-section of the road such that different values of parameters of the geometric design of the road, traffic on the road, traffic rules for traffic flow on the road define different traffic scenarios. By relaxing configuration parameters of a real-world scene and tightening corresponding limiting parameters, a mixed integer non-convex constraint optimization problem for a current real-world traffic scene is converted into a mixed integer convex optimization problem for approximate representation of the real-world traffic scene, so that a carrier is controlled. A mixed integer convex optimization problem for the converted approximate representation of the real-world traffic scene is solved to generate current control commands for controlling one or more actuators of the vehicle.
Owner:MITSUBISHI ELECTRIC CORP

Generative three-dimensional reverse design method and system based on physical perception

The invention discloses a physical perception-based generative three-dimensional reverse design method and system, which realize efficient exploration and optimization in a three-dimensional design space by constructing a unified physical-geometric potential representation and combining a two-stage optimization strategy. According to the method, shape and physical field data combined training is utilized to obtain potential representation, so that a geometric structure and physical constraints are compactly represented; on the basis, two stages of physical perception optimization are adopted: in the first stage, global exploration is performed in a potential manifold through a gradient-guided diffusion model, and an initial grid is generated; and in the second stage, the initial grid is locally optimized by utilizing target-driven topology maintenance optimization, so that the initial grid gradually approaches the target performance requirement. According to the method, the high-fidelity three-dimensional geometric design can be directly generated, the target performance and the result diversity of the design are remarkably improved, the method can be widely applied to aerospace, energy equipment and complex engineering structure design, and a new technical approach is provided for efficient implementation of the three-dimensional intelligent design.
Owner:ZHEJIANG UNIV

Geometry design for acquiring surface das data to monitor carbon storage sites

The disclosed method includes: determining a subsurface space of interest; arranging a source sensor array relative to a receiver sensor array of a Surface Distributed Acoustic Sensing (S-DAS); transmitting, from the source sensor array, a first set of seismic signals indicating baseline measurements; receiving, using the receiver sensor array, the baseline measurements and thereby generate baseline data; injecting fluid into the subsurface space of interest; transmitting, using the source sensor array, a second set of seismic signals indicating fluid plume measurements; receiving, using the receiver sensor array, the fluid plume measurements and thereby generate fluid plume data; determining, based on the baseline data and the fluid plume data, time-shift data and thereby generate fluid plume extent data; formatting the fluid plume extent data into data values that characterize an extent or rate of spread of the fluid plume; and visualizing the extent or rate of spread of the fluid plume.
Owner:SCHLUMBERGER TECH CORP +3

Finite element analysis method and system for geometric design of flow regulating valve

The invention provides a finite element analysis method and system for geometric design of a flow regulating valve, and relates to the technical field of data processing.The method comprises the steps that 1, spatial geometric feature analysis is conducted on each data point in a discrete contour coordinate dataset, the principal curvature value of each data point on the sealing surface of a metal diaphragm is solved, and the principal curvature value of each data point is calculated; determining a point with the maximum average curvature value on the sealing surface of the metal diaphragm as a core morphology reference point; step 2, establishing a local coordinate system by taking the core morphology reference point as an original point, screening four sealing state points from the discrete contour coordinate data set, solving a corresponding space plane equation, and calculating a space intersection line between the space plane and the sealing surface of the metal diaphragm; according to the method, through accurate positioning of the core reference point, definition of the analysis sub-domain, grid division, mechanical solution, leakage rate calculation and parameter optimization, the dynamic particulate matter problem is effectively improved, and the sealing performance and the micro flow adjusting precision are improved.
Owner:SHANGHAI JUKE FLUID CONTROL CO LTD

Geometry design for acquiring surface das data to monitor carbon storage sites

The disclosed methods include: determining a central reference point for fluid migration associated with the stored subsurface fluid; generating a radial coverage detection space extending from the central reference point for the fluid migration associated with the stored subsurface fluid; initializing a subsurface computing model for the stored subsurface fluid; overlaying the radial coverage detection space or detection system over the subsurface model for the stored subsurface fluid; execute one or more simulations by adapting or varying the one or more parameters of the subsurface computing model based on fluid plume data or fluid pressure data associated with the stored subsurface fluid; generating, based on the fluid plume data or fluid pressure data, spatial or temporal fluid distribution data associated with the stored subsurface fluid; and generating, based on the spatial or temporal fluid distribution data, PP data and PS data associated with the stored subsurface fluid.
Owner:SCHLUMBERGER TECH CORP +3

Microwave device multi-physics field optimization method taking electromagnetism as center based on feature assistance and agent model

The invention discloses a microwave device multi-physics field optimization method taking electromagnetism as a center based on a feature assistance and proxy model. The method comprises the steps of setting initial values of geometric design variables and multi-physics field design variables; the multi-physical field response with electromagnetism as the core responds at the solution point {xg, xm}, multiple pieces of parallel multi-physical field data are generated, and f represents the frequency; according to the multi-physics field data, constructing a feature-assisted multi-physics field agent model based on a neural network transfer function, and calculating a gradient optimization derivative of the feature-assisted multi-physics field agent model; and on the basis of the gradient optimization derivative and the optimization feature auxiliary multi-physics field agent model, obtaining an optimal solution of the variable. According to the method, the robustness and optimization design efficiency of a microwave device multi-physics field optimization algorithm taking electromagnetism as a core are improved.
Owner:TIANJIN UNIV

Spring stiffness characteristic simulation optimization method and system

The invention relates to a spring stiffness characteristic simulation optimization method and system. The spring stiffness characteristic simulation optimization method comprises the steps of obtaining first stiffness characteristic curve data of a spring through multi-physical field simulation, and extracting and obtaining a first physical morphological characteristic of the spring based on the first stiffness characteristic curve data; establishing a prediction model between the spring input parameters and the first physical morphological characteristics; in robust design optimization iteration, according to the geometric design parameters and the uncertainty parameters and on the basis of the prediction model, corresponding second physical morphological characteristics are obtained, and on the basis of the second physical morphological characteristics, second rigidity characteristic curve data of the spring are obtained through reconstruction; and on the basis of statistical analysis of the second stiffness characteristic curve data, a robust performance evaluation result of the design scheme under the influence of uncertainty is obtained, and according to the robust performance evaluation result, the geometric design parameters are iteratively adjusted until the spring design scheme meeting the robust requirement is obtained.
Owner:HANGZHOU SPRING

Multi-layer space shielding material optimization method based on uniform design

The method comprises the steps of 1, determining radiation shielding parameters; 2, analyzing and determining a radiation shielding material; 3, determining a space radiation environment; 4, geometric design and material result analysis; 5, multi-layer shielding material optimization based on uniform design; 6, analyzing a simulation result; and 7, comparing, analyzing and verifying. According to the method, research is carried out on the multilayer space shielding material by adopting a particle transport analysis means, analysis is carried out starting from a technological process, fault mode, influence and harmfulness analysis is carried out on the multilayer space shielding material, and key control parameters influencing the radiation shielding performance in the optimization design process of the multilayer space shielding material are found out. And performing experimental design on the key parameters through uniform design, and determining optimal design of the key parameters. And performing simulation analysis on the obtained key factors by means of particle transport software MCNP6 to obtain dose equivalent distribution conditions of the multilayer material under different thickness conditions, and verifying and correcting the simulation model through FLUKA codes. And finally, summarizing the multilayer space radiation shielding material in combination with the optimization model so as to provide a theoretical basis for shielding optimization of the multilayer material of the spacecraft.
Owner:BEIHANG UNIV

Aerial work carriage-shaped arm section optimization method and system considering stability and rigidity

The invention discloses an overhead working truck bed-shaped arm section optimization method and system considering stability and rigidity. The method comprises the steps that geometric design parameters of all polygonal sections of the box-shaped arm are set, and the geometric design parameters of all the polygonal sections jointly form an adjustable geometric design space; establishing a three-dimensional finite element analysis model of the box-shaped arm, and endowing the three-dimensional finite element analysis model with material attributes; according to the actual use requirement of the box-shaped arm, the analysis working condition of the three-dimensional finite element sub-model is defined as the most stringent working condition combination; and setting an optimization target, executing a multi-target optimization algorithm and solving to obtain geometric design parameters of each polygon section after optimization. According to the method, through scientific multi-objective optimization simulation, the coupling and restricting relation between two core performance indexes of local stability and deflection (rigidity) in boom design is systematically solved, so that the section shape with the optimal comprehensive performance under the given working condition is obtained.
Owner:HUBEI RUIYATE AUTOMOBILE CO LTD

Simulation method and system of surface acoustic wave device and related equipment

The invention is suitable for the technical field of communication, and particularly relates to a simulation method and system of a surface acoustic wave device and related equipment. The method comprises the following steps: acquiring test response parameters of the surface acoustic wave device; based on a first preset algorithm, establishing an accurate simulation model of the surface acoustic wave device, and calculating by taking the geometric design parameter corresponding to each resonator as the input of the accurate simulation model of the surface acoustic wave device to obtain a simulation response parameter corresponding to each resonator; performing iterative optimization on the accurate simulation model of the surface acoustic wave device according to the error function based on a second preset algorithm to obtain an optimized accurate simulation model of the surface acoustic wave; and a simulation result is obtained by optimizing the surface acoustic wave accurate simulation model. Compared with the prior art, the method has the advantages that the simulation influence of the surface acoustic wave device caused by process errors and packaging test environment changes in the production process can be effectively reduced, the design efficiency of the surface acoustic wave device is improved, and the cost of repeated production tests is reduced.
Owner:FEIXIANG TECH (WUXI) CO LTD

Intersection geometric design and signal control collaborative optimization method based on simulation optimization

The invention discloses an intersection geometric design and signal control collaborative optimization method based on simulation optimization, and the method comprises the steps: building an intersection optimization model and a simulation model, enabling the input of the intersection optimization model to be intersection traffic demands and geometric conditions, and enabling the output of the intersection optimization model to be intersection geometric design and signal control related decision variables; the output of the simulation model is an operation evaluation index of the corresponding scheme; wherein the simulation model automatically adjusts a decision variable of an intersection design scheme into a geometric structure and a signal timing parameter in the simulation model, simulation is operated to obtain an optimized target value, the optimized target value serves as an adaptive value of a particle swarm optimization algorithm to update the decision variable of the current scheme, and the updated variable value is returned to the intersection optimization model. And scheme transmission and optimization are realized. According to the method, the diversity of simulation output results is fully exerted, the optimization target can be freely replaced on the basis of not modifying the upper layer model, and the flexibility and optimization efficiency of the intersection optimization model are improved.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

A computer-implemented method for systematic design configuration, assessment and optimization of a thermal transfer device

A computer-implemented method for systematic configuration, assessment and optimization of a thermal transfer device comprising a plurality of thermal transfer elements arranged in a structured way, wherein each thermal transfer element extends along an axial path, the method including the steps of: starting with an initial geometric design of the plurality of thermal transfer elements; using an optimization framework with a computational model for performing computerized simulations of fluid dynamics and heat transfer at least around said thermal transfer elements during intended operation of the thermal transfer device, in order to perform geometric design optimization of each thermal transfer element based on an optimization algorithm targeting predetermined criteria, wherein the optimization framework is configured to iteratively refine the geometric design of each individual thermal transfer element; and wherein the geometric design of multiple thermal transfer elements are allowed to be varied independently of each other during optimization.
Owner:VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK NV (VITO) +1

Design parameter extraction method and system based on geometric features

The invention belongs to the technical field of data processing, and provides a design parameter extraction method and system based on geometric features, a geometric model is disassembled in combination with the geometric features, all components in the model and the mutual relation of the components can be more accurately understood and analyzed, and the accuracy of data processing is improved; the geometric design parameters are set according to the geometric feature types, so that the accuracy, reliability and scientificity of the design parameters are ensured, and meanwhile, the efficiency of setting the design parameters can be remarkably improved; the integrity of the geometric model is verified, so that the reasonability of the constructed design parameters can be ensured, and geometric loss cannot be caused; by optimizing the design parameters, the total quantity of the design parameters of the complete geometric model can be effectively reduced, the complexity and the data volume of the model can be remarkably reduced, the maintainability and the expandability of the relevant performance corresponding to the design parameters can be improved, and the cost required for performance evaluation in the later period can be further reduced.
Owner:SHANGHAI SHIP & SHIPPING RES INST CO LTD

Optimization method for low-temperature deep-well pump impeller based on PSO algorithm

The invention discloses a low-temperature deep-well pump impeller optimization method based on a PSO algorithm. The low-temperature deep-well pump impeller optimization method comprises the following steps that parametric modeling is conducted on an impeller of a low-temperature deep-well pump; combining the impeller subjected to parametric modeling with other flow passage components, and performing numerical simulation calculation to obtain the hydraulic performance of the low-temperature deep-well pump model; the hydraulic performance comprises lift and efficiency; if the low-temperature deep-well pump model needs to be optimized, sensitivity analysis is carried out with geometric design parameters of the impeller as input parameters and hydraulic performance of the low-temperature deep-well pump model as output parameters, a multi-objective optimization MOP agent model is constructed according to a sensitivity analysis result, the multi-objective optimization MOP agent model is optimized based on a particle swarm optimization algorithm, and the low-temperature deep-well pump model is obtained. And obtaining an optimized impeller model. Compared with a traditional optimization method, the method can provide reliable design reference for designers lacking rich design experience, so that the design quality is improved, the calculation precision is ensured, the optimization process is remarkably accelerated, and the required optimization time is shortened.
Owner:CHONGQING HONGJIANG MACHINERY CO LTD

Design method and device for heat exchanger of air conditioning system of electric vertical take-off and landing aircraft and storage medium

The invention discloses a design method and device for an air conditioner heat exchanger of an electric vertical take-off and landing aircraft and a storage medium, and the method comprises the steps: firstly determining multiple types of geometric design parameters and parameter ranges of the heat exchanger, and building a heat exchanger weight calculation model and a heat exchanger heat exchange amount calculation model; sampling parameter ranges of various geometric design parameters to obtain N sample point sets; then, a multi-objective evaluation function of a genetic algorithm is constructed based on the heat exchanger weight calculation model and the heat exchanger heat exchange calculation model, and the genetic algorithm is adopted to carry out multi-time iterative optimization solution based on the multi-objective evaluation function by taking the N sample point sets as populations to obtain multiple groups of heat exchanger geometric design parameter optimization solution sets; and finally, verifying the thermodynamic properties under each group of heat exchanger geometric design parameter optimal solution set, so as to determine the heat exchanger geometric design parameter optimal solution set. The device and the storage medium are used for implementing the method. According to the method, the rapid iteration and design type selection requirements of the thermal management system can be met.
Owner:HEFEI KASEN AVIATION TECHNOLOGY CO LTD

Heat exchange equipment optimization design method and system, medium and equipment

The embodiment of the invention provides a heat exchange equipment optimization design method and system, a medium and equipment, and the method comprises the steps that according to the design working condition of heat exchange equipment, thermodynamic parameters and geometric design parameters are determined; determining a pipe side heat transfer film coefficient and a shell side heat transfer film coefficient according to the geometric design parameters; according to the pipe side heat transfer film coefficient, the shell side heat transfer film coefficient, the heat exchanger pipeline outer side area, the heat exchanger pipeline inner side area and the pipe wall thickness, the total heat exchange coefficient is determined; according to the thermodynamic parameters and the total heat exchange coefficient, the total heat exchange area of the heat exchange equipment is determined; and the total heat exchange area is substituted into the evaluation model, and geometric design parameters corresponding to the total heat exchange area meeting preset conditions serve as target design parameters and are applied to design of the heat exchange equipment. Through the method, a heat exchange equipment design scheme considering both design flexibility and engineering feasibility can be obtained.
Owner:CHINA THREE GORGES CORPORATION +1

Characteristic control point-based curve adjustment method, device and equipment, medium and product

The invention discloses a curve adjustment method and device based on feature control points, equipment, a medium and a product, and relates to the field of computer-aided geometric design, the method comprises the following steps: introducing a shape parameter a, and constructing a planar cubic Bezier curve with the shape parameter; according to design requirements, performing interpolation processing on feature points of the planar cubic Bezier curve, and determining curve segments with the feature points; based on a continuity constraint condition, splicing all curve segments with feature points; initializing adjustment parameters according to the curve type, the feature point type and the interpolation position of the planar cubic Bezier curve; according to the initialized adjustment parameters, control points of the curve segments with the feature points are calculated, and a linear equation set is constructed; the control parameters are optimized according to the linear equation set, the curve shape is adjusted according to the optimized control parameters, curve continuity can be improved, and the type of the insertion point can be controlled.
Owner:HENAN UNIVERSITY

Computer-implemented method for systematically configuring, evaluating and optimizing heat transfer device

A computer-implemented method for systematically configuring, evaluating and optimizing a heat transfer device comprising a plurality of heat transfer elements arranged in a structured manner, each heat transfer element extending along an axial path, the method comprising: starting from an initial geometric design of the plurality of heat transfer elements; a computer simulation of fluid dynamics and heat transfer at least around the heat transfer elements is performed during an intended operation of the heat transfer device using an optimization framework with a computational model to perform a geometric design optimization for each heat transfer element based on an optimization algorithm targeting a predetermined criterion, the optimization framework is configured to iteratively improve the geometric design of the respective heat transfer elements, and to allow the geometric designs of the plurality of heat transfer elements to change independently of one another during optimization.
Owner:VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK NV (VITO)

Multi-objective optimization design method for metal wedge-shaped anchoring joint for clamping composite structure and related device

The application discloses a multi-objective optimization design method and related device for clamping a metal wedge-shaped anchoring joint of a composite structure, and relates to the technical field of anchoring of marine engineering composite material structures. The method comprises constructing a mechanical-bonding composite three-dimensional finite element model based on the geometric components of the metal wedge-shaped anchoring joint. Numerical simulation is performed on the multiple geometric design variables through experimental design, and key design variables affecting anchoring strength, clamping stress and joint weight are screened through variance analysis. The steepest ascent method is used to determine the optimization direction, and a quantitative mapping relationship between the design variables and the optimization objectives is constructed in the optimization region using the response surface method to establish a high-precision surrogate model. The maximum anchoring strength, the minimum clamping stress and the minimum joint weight are taken as the objectives, the surrogate model is used as an objective function evaluator, a multi-objective genetic algorithm is applied for collaborative optimization, an optimal solution set is obtained, and the optimal geometric structure parameter combination of the metal wedge-shaped anchoring joint is determined according to requirements.
Owner:OCEAN UNIV OF CHINA

Method for measuring pressure deformation of a nuclear power plant containment and related device

The present application relates to the technical field of nuclear power plant containment structure deformation measurement, and discloses a pressure deformation measurement method for a nuclear power plant containment and related devices. The method comprises obtaining the outer curved surface geometric design parameters and correction parameters of the outer dome at the outer monitoring point, and the inner curved surface geometric design parameters of the inner dome at the inner monitoring point; obtaining the strain measurement value of the outer monitoring point of the outer dome under the action of the environmental load in the state that the inner shell bears the internal pressure; determining the free displacement estimation value of the outer shell at the outer monitoring point; determining the actual displacement value of the outer shell in the environment; determining the relative displacement change between the inner monitoring point and the outer monitoring point; and determining the deformation displacement of the inner shell at the inner monitoring point under the loaded state. The present application does not need to set up components such as metal wires inside the inner shell which are easily affected by temperature, but calculates the deformation displacement of the inner shell by the strain measurement value, the relative displacement measurement value, and the geometric design parameters and correction parameters, so as to weaken the interference of temperature on the measurement result.
Owner:CHINA NUCLEAR POWER ENGINEERING COMPANY LTD +1

Building structure material usage prediction method and device, electronic equipment and storage medium

The application provides a building structure material quantity prediction method and device based on a knowledge embedding neural network, electronic equipment and a storage medium, wherein the method comprises the following steps: obtaining design conditions of a target building structure, the design conditions comprising seismic design conditions, wind resistance design conditions and overall geometric design conditions of the structure; obtaining a structure design scheme of the target building structure, the structure design scheme comprising the spatial positions and geometric sizes of walls, columns, beams, plates and supports; inputting the design conditions and the structure design scheme into a pre-trained material quantity prediction model to obtain the material quantities of various materials in the target building structure. The method embeds prior knowledge into the material quantity prediction model, overcomes the defects of the prior art that the material quantity prediction value violates the basic common sense of engineering and has low prediction accuracy due to the inability to consider the prior knowledge in the field related to building structures, and realizes accurate and efficient prediction of the material quantity of the target building structure.
Owner:TSINGHUA UNIVERSITY

Sound barrier based on spatial coiling square super-unit array and optimization design method thereof

The invention discloses a sound barrier based on a space coiling square super-unit array and an optimization design method thereof. The invention relates to the technical field of sound barriers and comprises a square super unit. A plurality of groups of square super units are distributed in an array mode, are designed in a square surrounding mode and are formed by four groups of space coiling boxes in a surrounding mode. The sound barrier is formed by stacking the square super units distributed in an array mode, and the interior of the space coiling box is divided into the coiling channels through the partition plates. The square super-unit structure comprises the square ring coiling area on the periphery and the ventilation open area in the middle, is easy to manufacture and good in ventilation performance, and can guarantee that the ventilation performance reaches the standard while guaranteeing the good sound insulation effect. In addition, the noise reduction performance of the sound barrier is optimized through an automatic optimization design method. By the adoption of the optimization design method, the simulation calculation time can be greatly saved, the design efficiency is improved, and it is possible to select the optimal size from various geometric design parameters.
Owner:WUHAN INST OF TECH

A method and system for excavating slope foundation trenches for prefabricated quick-assembly lattice beams.

This invention relates to the field of earthwork trenching technology, specifically to a method and system for excavating slope trenches for prefabricated quick-assembly grid beams. In this invention, by collecting high-density discrete coordinates of the slope and constructing a reference straight-line vector connecting the beginning and end, the geometric correction depth of each surface point relative to the ideal flat bottom surface is calculated. This eliminates nonlinear errors caused by the original slope undulations, ensuring that the bottom surface of the trench accurately adapts to the straight-line configuration of the prefabricated components. The resistance gradient change characteristics during the excavation process are combined with a clustering algorithm to dynamically lock the interface between soft and hard geological layers. The excavation depth required by the geometric design is fused and compared with the measured depth of the geotechnical boundary in the same coordinate system. Based on the comparison results, differentiated cutting or stripping commands are intelligently generated. When encountering hard rock layers higher than the designed bottom surface, a fuzzy PID algorithm is activated to enhance hydraulic driving force and ensure cutting efficiency. In soft soil operating areas, standard pressure is maintained to reduce energy consumption.
Owner:DALIAN UNIV

Autonomously optimising a geometric design for a mechanical part

The disclosure provides computing apparatus, computer-implemented methods and software for autonomously generating a geometric design for a mechanical part optimised to perform an intended function by interacting with a fluid and / or particulate matter in an operating environment. The method includes iteratively generating a plurality of CAD models for the mechanical part using a CAD kernel program based on a search distribution across a parameter space of free parameters defining geometric features of the designs, generating a simulation of the performance of the modelled mechanical part for each of the plurality of generated CAD models, analysing the simulation of each CAD model for the mechanical part over time, selecting a subset of the generated CAD models having a better performance, and proceeding to the next epoch to generate, simulate and analyse evolved CAD models having candidate geometries with features based on combinations of free parameters synthesised across an updated search distribution.
Owner:THE UNIV OF BIRMINGHAM

Integrated Design Optimization and Material and Subassembly Selection using Machine Learning

A system for optimizing physical designs provides integrated optimization of design geometry, design materials, and design subassemblies by mapping a catalog of actual or available construction materials and subassemblies to a differentiable representation tractable for computerized optimization. New subassemblies may be generated by using the differential representation in conjunction with a decoder trained on the actual or available subassemblies.
Owner:THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY

Neural network electromagnetic performance prediction method with causality and passivity constraints

The invention discloses a neural network electromagnetic performance prediction method with causality and passivity constraints, and the method comprises the steps: obtaining geometric design variables of a TSV structure to be detected, inputting the geometric design variables into a trained electromagnetic performance prediction model, and obtaining the prediction values of a plurality of scattering coefficients of the TSV structure to be detected; wherein the electromagnetic performance prediction model comprises a polar point sub-network, a residue sub-network and a prediction sub-network, and the polar point sub-network and the residue sub-network are respectively used for determining a to-be-detected polar point vector and a to-be-detected residue vector corresponding to each scattering coefficient according to geometric design variables of a to-be-detected TSV structure; the prediction sub-network is used for determining a prediction value of a scattering coefficient of a corresponding type according to a to-be-measured pole vector and a to-be-measured residue vector; the electromagnetic performance prediction model is trained through a sample pole vector and a sample residue vector, and the sample pole vector and the sample residue vector are obtained by processing a sample scattering coefficient based on a vector fitting technology. The method is low in implementation cost and good in adaptability.
Owner:XIDIAN UNIV

An optimization design method for the propeller blades of a multi-rotor bomb-dropping fire-fighting UAV

The present invention provides an optimized design method for the blades of a multi-rotor bomb-dropping fire-fighting UAV, which relates to the technical field of UAVs. The present invention obtains the geometric design data of the fuselage and the blade design data, constructs a fire-fighting UAV model using CFD software, performs aerodynamic analysis using this model to obtain flight force data; generates a blade flight evaluation coefficient based on the blade material property data and the flight force data; obtains the blade flight evaluation coefficients at each rotational speed gear and analyzes them to obtain a flight quality evaluation coefficient; constructs and trains a flight quality evaluation model with the historical blade design data as the input and the corresponding historical flight quality evaluation coefficient as the label; uses the blade design data as the initial solution and maximizes the blade flight evaluation coefficient as the optimization objective, and uses the simulated annealing algorithm to optimize the blade design data to obtain the optimal blade design data.
Owner:QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)