吉林大学学报(工学版) ›› 2024, Vol. 54 ›› Issue (4): 874-882.doi: 10.13229/j.cnki.jdxbgxb.20220611
夏超1,2(),王梦佳1,2,朱剑月3(),杨志刚1,2,4
Chao XIA1,2(),Meng-jia WANG1,2,Jian-yue Zhu3(),Zhi-gang YANG1,2,4
摘要:
本文采用了一种非线性的分层卷积自编码器,类比于本征正交分解的方法,可以对提取到的低维特征进行能量排序,同时又能在一定范围内达到更高的降阶性能。文中以雷诺数为20 000的三维圆柱钝体湍流尾迹流动为例,分析分层卷积自编码器对该流场的降阶能力,并与本征正交分解的结果作对比。同时,在此基础上延伸出组合模态的概念,并增加每一组低维潜在向量数,观察重构流场与原始流场的均方误差变化。结果表明,在分层层数及每层潜在空间向量数较少时,非线性的分层卷积自编码器相对于本征正交分解的方法对流场有更强的还原能力,但是其优势会随着层数和潜在向量数的增加而减弱。
中图分类号:
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