ABSORBING BOUNDARY CONDITIONS FOR GRANULAR ACOUSTICS

被引：0
|
作者：
McNamara, Sean C. [1 ]
机构：
[1] Univ Rennes 1, CNRS, UMR 6251, Inst Phys Rennes, F-35042 Rennes, France
来源：
PARTICLE-BASED METHODS III: FUNDAMENTALS AND APPLICATIONS | 2013年
关键词：
Granular Materials; DEM; Acoustics; Attenuation; Boundary Conditions;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
The boundary conditions of soft-sphere DEM are usually perfect reflectors of acoustic waves, leading to an unrealistic accumulation of energy. This situation is usually dealt with by global damping. In some situations, this solution is undesirable, so we present an alternative. If the grain-wall contact is made soft and dissipative, most acoustic energy incident on the boundary will be trapped and dissipated there. We show that these boundary conditions can efficiently damp both high and low frequency waves.
引用
收藏
页码：80 / 90
页数：11
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