采用数值计算和模型试验相结合的方法对深水半潜式平台涡激运动特性进行了系统研究.模型试验在拖曳水池内开展，采用4点水平系泊方式；数值计算选用黏性流的计算流体力学方法，建立适用于研究平台涡激运动的分析方法，开发合理的网格划分模式，引入网格变形和重构技术解决非线性的流固耦合问题；研究半潜式平台在不同来流角度下的横荡运动、纵向偏移特征；深入研究涡激锁定现象，给出不同角度下的漩涡锁定区间，获得涡激锁定的相关特性；研究平台涡激响应随折合速度所经历的演化过程；揭示了平台涡激运动随时间变化的发展阶段，分析各阶段漩涡泄放的特点.
The characteristics of vortex-induced motion(VIM) about a semi-submersible platform in deep water are investigated systematically on the basis of the method combining numerical calculation with model test. The model test is carried out in towing tank with four horizontal mooring lines. Computational fluid dynamics (CFD) method based on viscous flow method is applied. The analytical method which is suitable for platform VIM prediction is established. Good mesh mode combined with the technology of mesh deformation and reconstruction is applied to solve non-linear fluid-structure interaction problem. Sway motion and longitudinal offset traits at different flow angles are investigated. Vortex lock-in phenomena are also studied in detail, including lock-in interval at different angles and its relative trait. The evolutionary process of VIM response versus reduced velocity is analyzed. Meanwhile, the development process of VIM response versus time series, as well as the vortex shedding traits in each step is investigated.
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