摘要
Newmark-β迭代法是系泊缆索动力分析中应用广泛的一种数值求解方法,为分析该数值方法的计算效率,对其进行深入研究,讨论各要素对计算耗时的影响。研究发现,单元数对计算耗时的影响比较敏感,适当增大时间步长可以缩短计算耗时。合理控制每个时间步的最大迭代次数,能够有效减少计算耗时,同时计算精度也能得到保证。在系泊浮体动力耦合分析的弱耦合算法中,各根系泊缆索动力响应是独立求解的。所开展的多根系泊线并行计算显著提高了计算效率。
Newmark-β iteration method is a numerical method widely used in dynamic analysis of mooring lines which shows advantage of good numerical stability and is adapted to large time marching step. This method is deeply studied to discuss the influences of various factors on the computing efficiency for dynamics of moorings. It is found that the element number is sensitive to the time consuming,and properly increasing time step is also beneficial for time consuming reduction. It is also verified that controlling the maximum iteration steps properly per time step can reduce the consuming time efficiently and keep the numerical accuracy together. In the weak coupling algorithm of dynamic coupling analysis of floating structures, dynamic response of each mooring is solved separatedly. The parallel computing is studied to compute the dynamic response of moorings together. It is found that the computing efficiency is significantly improved.
作者
章健军
马山
段文洋
唐滨
ZHANG Jianjun;MA Shah;DUAN Wenyang;TANG Bin(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China)
出处
《中国海洋平台》
2018年第5期63-69,80,共8页
China offshore Platform
基金
国家自然科学基金资助项目(51379045)
