基于CIBC迭代耦合技术的矩形柱扭转驰振分析  

Analysis of Rotationally Oscillating Rectangular Cylinder Based on CIBC Iterative Coupling Technique

作　　者：马晋[1] 周岱[1] 何涛[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《建筑科学与工程学报》2013年第2期70-75,共6页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(51078230;11172174)

摘　　要：针对流固耦合分区求解算法存在的时间滞后效应,提出了一种改进型结合界面边界方法(改进型CIBC方法),同时避免了原始结合界面方法(CIBC方法)必须调用未经修正的结构拖曳力。在此基础上构建了隐式耦合算法和半隐式耦合算法,并采用固定点迭代技术结合Aitken加速策略实现迭代过程。采用本文方法对一矩形柱的流致自由扭转驰振进行了分析,并与已有文献结果进行了对比。结果表明:本文计算结果与已有文献数据吻合良好,验证了本文方法的有效性;隐式耦合算法和半隐式耦合算法均成功地揭示了扭转驰振现象,且具有较高的计算效率。Partitioned solution approach for fluid-structure interaction was born with the time lag effect. In order to alleviate the adverse effect, a new formulation of the combined interface boundary condition （CIBC） method was developed. Meanwhile, authors modified the CIBC method to repair the inconvenience that the original CIBC method had to invoke the uncorrected traction when forming the structural traction correction. Then two partitioned algorithms including the implicit coupling strategy and semi-implicit coupling strategy were presented based on the modified CIBC method. Both iterative loops were actualized by the fixed-point iteration algorithm and the Aitken acceleration method. A rotationally oscillating rectangular cylinder was analyzed using the proposed method, and comparisons of the calculation results in the paper and documented data were carried out. The results show that the obtained results in the paper agree well with the documented data. The well-known flow phenomena, rotational galloping have been exposed successfully, and the partitioned algorithm has high computation efficiency.

关 键 词：有限元方法 流固耦合 分区迭代算法 结合界面边界方法 特征线分离算法 

分 类 号：TU311.3[建筑科学—结构工程]