Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optimization method of vehicle drag coefficient based on adaptive surrogate model

An adaptive proxy and drag coefficient technology, which is applied in design optimization/simulation, special data processing applications, geometric CAD, etc., can solve problems such as low optimization efficiency, complicated operation, and long time consumption, and meet the requirements of reducing R&D costs and engineering experience Low, the effect of reducing the number of calls

Active Publication Date: 2022-05-13
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex structure of the vehicle flow field, which presents a high degree of nonlinearity, it is very difficult to study the optimization of the vehicle drag coefficient. The optimization efficiency is low, the operation is complicated, and it takes a long time.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optimization method of vehicle drag coefficient based on adaptive surrogate model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0035] Such as figure 1 As shown, the vehicle drag coefficient optimization method based on the adaptive proxy model includes the following steps:

[0036] A. Carry out CFD simulation calculation on the initial model of the car to obtain the calculated value of the drag coefficient of the initial model;

[0037] B. Select the design variables and determine the variation range of the design variables;

[0038] C. Construct a parametric model based on the initial model;

[0039] D. Select a sample point and store it in the sample point database;

[0040] E. Calculate the drag coefficient calculation value corresponding to the sample point based on the parameterized model, and store it ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an automobile drag coefficient optimization method based on an adaptive agent model, comprising the following steps: performing CFD simulation calculation on the initial model of the automobile; selecting design variables and determining their variation range; constructing a parameterized model; selecting sample points and calculating The corresponding drag coefficient calculation value is stored in the sample point database; judging whether design variables need to be screened; constructing a proxy model; optimizing the proxy model to obtain the optimal solution and optimized value; The distance between the sample points and the absolute value of the difference between their corresponding drag coefficient calculation values ​​are used to obtain the increase point; the error between the minimum drag coefficient calculation value and the corresponding optimized value is calculated until the accuracy requirements are met. The beneficial effects of the invention are as follows: on the premise of ensuring the accuracy, the calling times of the complex real simulation model are reduced, the optimization efficiency of the drag coefficient of the automobile is improved, time and cost are saved, and the research and development cycle is shortened.

Description

technical field [0001] The invention belongs to the technical field of automobile aerodynamics, and in particular relates to an automobile drag coefficient optimization method based on an adaptive proxy model. Background technique [0002] With the continuous improvement of the fuel consumption evaluation index of fuel vehicles and the mileage requirements of new energy vehicles, it has become an urgent need for various OEMs to create a low wind resistance vehicle. The traditional method of reducing the drag coefficient of automobiles, which mainly relies on wind tunnel tests, is short of test resources and high in research and development costs, and cannot meet the requirements of modern automobile development efficiency. Reducing the drag coefficient through CFD simulation technology can effectively shorten the research and development cycle and reduce research and development costs, and has become an indispensable means in the process of automobile development and design....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/28
CPCG06F30/15G06F30/28
Inventor 吴琳琳付宇卜晓兵李向荣马小乐兰吉
Owner CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com