弱耦合算法的实现及其应用

介绍了一种求解流固耦合问题更有效的方式即弱耦合技术,将计算结构动力学(CSD)和计算流体动力学(CFD)联合起来。CSD通过计算结构位移用来指定流体域的固体边界范围,而CFD计算用来定义作用在CSD上的荷载。荷载和位移的传递分别采用守恒和非守恒插值方法,详细介绍了其插值的实现过程。这种流固耦合算法是一种对整个问题进行离散化后,采用迭代求解方法的处理复杂的流固耦合问题的数值模拟方法。最后通过对一轻柔膜结构和风荷载的流固耦合问题的求解,表明了这种方法通过耦合CFD和CSD程序,提供了一种便利的、有效的耦合问题求解方法。

THE REALIZATION AND APPLICATION OF LOOSELY COUPLED ALGOIRITHM

This paper presents a loosely coupled algorithm to solve fluid-structure interaction problems more effectively. The proposed algorithm combines Computational Fluid Dynamics (CFD) and Computational Structural Dynamics (CSD) codes. The CSD is used to define the fluid region via the computed displacements of structures, while the CFD is used to define the loads on the CSD. For the purpose of illustration, the transfer of loads and displacements is carried out via conservative and non-conservative interpolation...