ALE Finite Element Analysis of Flow Interaction with a Flexible Filament
ALE Finite Element Analysis of Flow Interaction with a Flexible Filament
复制标题
柔性细丝流动相互作用的 ALE 有限元分析
DOI：
10.1080/10618569908940890
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Shinmyo
中科院分区：
文献类型：
--
作者：
T. Nomura;M. Shinmyo
本文提出了一种分析细长柔性纤维与绕其流动的相互作用的计算方法，将计算区域限定在二维垂直平面内，纤维用桁架单元离散。采用几何非线性动力学分析方法对灯丝的运动进行了分析。流动分析采用ALE有限元法。用交错算法交替求解细丝运动和流动是不稳定的，除非细丝的密度足够大。通过在每一时间积分步引入一个内迭代算法来减小由于过大的流体力而引起的灯丝的过大加速度，从而有效地稳定地模拟了灯丝的风致颤振。
A computational method is presented for the analysis of interaction between a thin, flexible filament and wind flow around it. Restricting the computational domain to the two dimensional vertical plane, the filament is discretized by truss elements. A geometrically nonlinear dynamic analysis method is applied to the motion of the filament. The ALE finite element method is employed for the flow analysis. A simple staggered algorithm to solve the filament motion and the flow alternatively was unstable unless the density of the filament is sufficiently large. An improved algorithm, where the excessive acceleration of the filament due to the excessive fluid force is reduced by introducing an inner iteration algorithm during each time integration step, was found effective to simulate a wind-induced flutter of the filament stably.