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改进时域间断Galerkin有限元方法在弹塑性波传播数值模拟中的应用
Release time:2019-03-10 Hits:
Indexed by: 期刊论文
First Author: 郭攀
Correspondence Author: Wu, W.; Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian, 116024, China; email: lxyuhua@dlut.edu.cn
Co-author: 武文华,吴志刚
Date of Publication: 2013-06-15
Journal: 固体力学学报
Included Journals: PKU、ISTIC、CSCD、Scopus
Document Type: J
Volume: 34
Issue: 3
Page Number: 299-304
ISSN No.: 0254-7805
Key Words: 改进时域间断Galerkin方法(mDGFEM);人工阻尼;波传播;强动荷载
Abstract: 对于高频、强脉动荷载作用下的结构动力学波传播分析,对比于传统的时域算法,时域间断Galerkin方法能捕捉到波阵面的间断,有效地避免了由于间断引起的数值振荡.但时域间断方法却带来了波前面的虚假数值振荡.论文针对上述波前数值振荡的现象进行研究,通过引入人工阻尼的方法对时域间断Galerkin有限元方法进行进一步改进.数值结果表明,所发展的方法能够有效的滤掉强动荷载产生的波前数值振荡现象,同时降低了时域间断Galerkin方法的网格依赖性.
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