船舶风载荷数值模拟中流域构造方法的研究与应用

Study and Application of Domain Decomposition Method in Ship Wind Load Simulation

以15000 TEU集装箱船为计算对象,针对船舶风荷载数值模拟中多风向角工况下大量重复性工作问题,基于STAR-CCM+平台,提出3种计算域构造方法:移动参考系模型法(MRF)、重叠网格法(Overset Mesh)、内外域分区构造法(Subregion),实现多风向角计算模型共享,助力风载荷数值建模的完全流程化和自动化。3种构造方式下风载荷数值模拟结果具有很好的一致性,验证了方法的同质性,并将正迎风时纵向力系数与Fujiwara经验公式对比,差异不大,初步证实计算结果的准确性,待后续风洞试验结果的进一步验证。

Taken 15000 TEU container ship as the calculation object,aiming at the problem of lots of repeating work in the numerical simulation of ship wind loads under the multi-wind-angle condition,based on STAR-CCM+platform,three methods of the computational domain decomposition are proposed such as moving reference frame(MRF),Overset Mesh and Subregion,which realizes the sharing of calculation mode of multi-wind-angle and helps the full process-oriented and automatic numerical model establishment of wind loads.The simulation results of wind loads by the three decomposition methods are of good consistency,which proves the homogeneity of the methods.The longitudinal force coefficient of head wind is compared with the Fujiwara empirical formula and both fit well with no large difference,which preliminarily verifies the accuracy of the calculation results.It will be further verified by the subsequent wind tunnel test.