Three-dimensional pavement generating method applying to virtual prototype system

A virtual prototype, three-dimensional technology, applied in the field of vehicle and traffic civil engineering, can solve problems such as inability to accurately reflect driving and road conditions, no universal method for three-dimensional road models, and less research.

Inactive Publication Date: 2009-04-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In terms of practical application of road surface generation, researchers focus more on the design and performance of the virtual prototype itself when actually researching and applying the virtual prototype. However, less research has been done on the 3D road surface environment in which the virtual prototype operates. The three-dimensional road surface cannot accurately reflect the real driving and road conditions
Currently, there is no universal method for creating complex 3D pavement models for virtual prototyping

Method used

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  • Three-dimensional pavement generating method applying to virtual prototype system
  • Three-dimensional pavement generating method applying to virtual prototype system
  • Three-dimensional pavement generating method applying to virtual prototype system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1 Ride comfort analysis of a car

[0063] Using Matlab and Adams as the simulation environment, the process of establishing a general model of a 3D random road surface is as follows: image 3 shown. Through the simulation comparison, the FFT model is selected for research, and it is expanded into a three-dimensional model, and the corresponding road surface files are generated, and then the simulation analysis and research on the driving comfort of the virtual prototype are carried out.

[0064] 1) Theoretical modeling. Extend the existing single-point time-domain model of road surface roughness to a time-domain model of road surface roughness in three-dimensional space;

[0065] 2) Model result output. Write the FFT three-dimensional road surface model program in MATLAB software, and take the condition of a certain road surface as an example to simulate the unevenness of the road surface, and then obtain the coordinate data of the three-dimensional road s...

Embodiment 2

[0105] Example 2 Analysis of road friendliness of heavy goods vehicles

[0106] Taking the World Bank Anhui Highway Project II overloading project, research on multi-domain collaborative modeling and simulation method of road damage under vehicle-road coupling (National Natural Science Foundation Project 50708020) and other projects as examples, the specific implementation of this method is illustrated.

[0107] The rapid development of road traffic and the popularity of heavy trucks will inevitably lead to an increase in road maintenance costs. According to the statistics of my country's Ministry of Communications, the country spends about 30 billion yuan on road maintenance every year, and a large number of overloaded heavy trucks are the main factor of road damage. Therefore, analyzing the damage and damage degree of heavy freight vehicles to expressway pavement and improving the road friendliness of vehicles has become a hot issue of great concern to vehicle design and hig...

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Abstract

The invention discloses a 3D pavement generation method applicable to a virtual prototype system. The method comprises the following steps: the first step, establishing a 3D random pavement elevation model of a fast Fourier transform (FFT) algorithm based on a single-point FFT pavement roughness random excitation time domain model; the second step, programming a general program of the FFT 3D pavement model in MATLAB software, and selecting the pavement of a specific level to simulate the pavement roughness according to needs, thus obtaining coordinate data of the 3D pavement; the third step, establishing a generalized pavement file which is applicable to common multibody dynamics software: establishing a general model which generates the 3D pavement file and comprises the node generation and the unit generation algorithm, thus compiling the coordinate data of the 3D pavement obtained in the second step into a pavement file that can be identified by virtual prototype simulation software; and the fourth step, performing virtual prototype modeling simulation. The method has faster computation speed of the 3D FFT model, and is more suitable to the research requirements of multi-dimensional complicated systems, real-time systems and the like.

Description

1. Technical field [0001] The invention relates to the field of vehicle and traffic civil engineering research, in particular to a three-dimensional road surface applied to a virtual prototype system in the above field. 2. Background technology [0002] Ride quality directly affects various aspects such as smooth driving, ride comfort, cargo integrity, fatigue life of parts and components, transportation efficiency, energy consumption (fuel consumption) and so on; The performance of road damage caused by wheel load on the road. The domestic and foreign research on vehicle ride comfort and road friendliness has made considerable progress in recent years. At the same time, as the main research method for vehicle ride comfort and friendliness, virtual prototyping technology has also been fully developed. [0003] In the study of "vehicle-road" interaction, if the direct test method based on the physical test or the indirect method combining test and simulation are used, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
Inventor 何杰彭佳陈一锴
Owner SOUTHEAST UNIV
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