基于SST-IDDES方法的深吃水半潜平台VIM响应特征分析

Response characteristics analysis of vortex-induced motions of deep draft semi-submersible platform using SST-IDDES

深吃水半潜平台涡激运动问题对平台的正常作业会产生不利影响。很多学者对涡激运动问题已进行了模型试验和数值模拟研究,研究发现湍流模型对数值模拟的结果有很大的影响。该文基于剪切应力输运(shear stress transport,SST)改进的壁面延迟分离涡方法(improved delayed detached eddy simulation, IDDES),在近壁面流域采用SST模型,在其他区域采用大涡模拟求解流场,模拟深海环境下深吃水半潜平台从"预锁定"到"锁定后"范围内折合速度下的涡激运动响应,研究了深吃水半潜平台主尺度参数对涡激运动响应的影响。该文为涡激运动研究提供了一种方法,可为深吃水半潜平台结构主尺度设计提供参考。

The vortex-induced motions(VIM)of deep draft Semi-submersible(DDS)will have adverse effects on the normal operation of the platform.In order to research the mechanism and characteristics of VIM,many researchers have done the model tneustm earnidc a ln usimmeurilcatail o nsi.mInul tathiios n.p aSpoerm,ei mrepsreoavrecdh edrse l afiynedd tdheatt a cdihfefde-reedntd yt ursibmuluelnactieo nm(oIdDelDs E hSa)v em egtrheoatd inbfalsueedn coen otnh et hseh erears ulsttsr e sosf transport(SST)model is used to simulate the VIM responses of the DDS from pre-lock-in to post-lock-in conditions.The influence of the main scale parameters of deep-draft semi-submersibles on the response to vortex-induced motion is studied.This paper provides a method for the study of vortex-induced motion and provides a reference for the design of the main scale of the deep-draft semi-submersible platform.