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>> 五零能模式材料设计的非线性有限元计算方法
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五零能模式材料设计的非线性有限元计算方法
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Release time:2019-03-11
Title of Paper:
五零能模式材料设计的非线性有限元计算方法
Indexed by:
期刊论文
Date of Publication:
2015-01-01
Journal:
固体力学学报
Included Journals:
Scopus、PKU、ISTIC、CSCD
Volume:
36
Issue:
4
Page Number:
297-318
ISSN No.:
0254-7805
Key Words:
五零能模式材料; 坐标变换设计方法; 完全拉格朗日方法; 非线性有限元方法
Abstract:
五零能模式材料是一种新型人工超材料,特征为其弹性模量矩阵的6个特征值中5个为零,可用等效体积模量来描述,表现出类似流体的性质,可被应用于声学隐声
斗篷的设计中.然而,根据Norris A
N~([1])提出的理论,设计五零能模式材料时,与应用变换声学方法设计一般声学人工超材料不同,要求其满足一非线性偏微分方程约束.论文利用非线性有
限元的完全拉格朗日方法,推导了这一偏微分方程的弱形式,并给出了相应的非线性有限元计算列式,以及迭代求解的具体算法.最后,给出了五零能摸式材料设计
的二维和三维坐标变换数值算例.
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两种五零能模式材料单胞构型及其性能分析
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Theoretical analysis of the sound absorption characteristics of periodically stiffened micro-perforated plates