A visualization system for studying train aerodynamics
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摘要: 列车气动试验数据可视化对列车空气动力学研究很重要.由于列车气动试验数据场是基于曲面域的散乱数据场,采用数据场网格划分和基于等参变换的区域映射插值相结合的插值方法.在此基础上改进了扫描线算法,克服了传统扫描线算法求解收敛性得不到保证的不足.为了适应试验数据可视化系统对系统扩展性的要求,采用面向对象的软件工程思想编制了试验数据可视化系统,并在实践中改善系统.Abstract: The test data visualization is very useful to study the train aerodynamics. In this paper, a new data interpolation method that combines a data field quadrilateral grid and region transformation based on the isoparametric transformation is proposed, because the data field of train aerodynamics test is the scattered data field based on curved surface. And the scanning algorithm is improved to overcome the defect of traditional algorithm, whose convergence is not ensured. In order to be able to expand the test data visualization system, the object-oriented approach is applied to the program. Finally, the test data visualization system is realized and tested, then the program is improved in practice.
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