Line Search Partitioned Approach for Fluid-structure Interaction Analysis of Flapping Wing
Line Search Partitioned Approach for Fluid-structure Interaction Analysis of Flapping Wing
复制标题
DOI：
10.3970/cmes.2008.024.051
复制
发表时间：
2008
影响因子：
2.4
通讯作者：
Tomonori Yamada;S. Yoshimura
中科院分区：
文献类型：
--
作者：
Tomonori Yamada;S. Yoshimura
扑翅昆虫的飞行动力学仍然是一个开放的研究领域，尽管众所周知，它们可以提供优越的飞行能力，如悬停运动。扑翼的数值分析需要进行流固耦合分析，以评估可变形机翼对飞行性能的影响。这种FSI分析是非常具有挑战性的，因为不仅需要紧耦合方法来准确预测飞行能力，而且需要鲁棒网格控制来跟踪具有弹性变形的机翼的大运动。本文提出了一种新的求解FSI问题的迭代分割耦合算法。该方法主要采用直线搜索法处理界面上的非线性问题，使每次不动点迭代中界面上的非平衡位移最小化。引入这种方法是为了提高计算的鲁棒性和效率。对扑翼的二维FSI分析表明，扑翼的弹性变形导致被动羽化运动，并有效地产生升力。关键词：流固耦合，分割法，线搜索法，扑翼。
Flight dynamics of flapping insects is still an open area of research, though it is well known that they can provide superior flight abilities such as hovering motion. The numerical analysis of flapping wing requires fluid-structure interaction (FSI) analysis to evaluate the effect of deformable wing on flight ability. Such FSI analysis is quite challenging because not only the tight coupling approach to predict flight ability accurately, but also the robust mesh control to trace the large motion of the wing with elastic deformation are required. A new iterative partitioned coupling algorithm for the FSI problems is proposed in this paper. In the proposed approach, non-linearity of the FSI problems is mainly treated on the interface using the line search method, which minimizes non-equilibrated displacements on the interface in each fixed point iteration. This approach is introduced to improve the robustness and efficiency of computation. A two-dimensional FSI analysis of a flapping wing shows that elastic deformation of the wing results in passive feathering motion and generates lift force effectively. Keyword: Fluid-structure interaction, partitioned method, line search approach, flapping wing.