Thin Solids for Fluid-Structure Interaction
Thin Solids for Fluid-Structure Interaction
复制标题
用于流固耦合的薄固体
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
E. Rank
中科院分区：
文献类型：
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作者：
D. Scholz;S. Kollmannsberger;A. Düster;E. Rank
在这方面的贡献使用六面体元素的结构模拟在流体-结构相互作用的框架，导致一致的运动学和几何描述的固体。为了补偿三维方法的额外数值工作量，提出了线性弹性动力学问题的各向异性p-自适应方法，比均匀p-扩展具有明显更高的效率和更高的收敛速度。特别强调的是，考虑到表面载荷积分计算的流体离散化的准确转移的负载。对于耦合与carbohydrated网格为基础的格子玻尔兹曼代码，它被发现，在界面牵引振荡可能会激发更高的结构模式，可能导致一个不稳定的耦合行为。这个问题的第一个补救措施是结构的线性模态分析，从而允许控制要考虑的模式的数量，而不忽视双向流体结构相互作用。本文给出了本书中提出的FSI基准配置的初步结果。
In this contribution the use of hexahedral elements for the structural simulation in a fluid structure interaction framework is presented, resulting in a consistent kinematic and geometric description of the solid. In order to compensate the additional numerical effort of the three-dimensional approach, an anisotropic p-adaptive method for linear elastodynamic problems is proposed, resulting in a clearly higher efficiency and higher convergence rates than uniform p-extensions. Special emphasis is placed on the accurate transfer of loads considering the fluid discretization for computation of the surface load integrals. For a coupling with a cartesian grid based Lattice Boltzmann code it was found that oscillations in the interface tractions may excite higher structural modes possibly leading to a non-stable coupling behavior. A first remedy to this problem was a linear modal analysis of the structure, thus allowing to control the number of modes to be considered without disregarding bidirectional fluid structure interactions. Preliminary results are presented for the FSI benchmark configuration proposed in this book.