张力腿平台涡激运动模型试验与数值分析

为揭示张力腿平台涡激运动响应规律，采用数值模拟与模型试验相结合的方法研究了全水深系泊张力腿平台涡激运动响应。根据张力腿平台主尺度参数，按照几何相似制作了水池试验模型，在满足运动相似和动力相似的条件下开展了均匀流、剖面流模型试验，并将模型试验结果与数值模拟结果进行了对比，验证了数值模拟与模型试验结果的一致性。分析结果表明在均匀流作用下张力腿平台涡激运动的锁定区间在5.5<U_r<8.5，来流角对涡激运动影响较大。剖面流作用下平台涡激运动规律与均匀流作用基本一致，但剖面流造流引起的能量分散，使平台在XY平面的运动轨迹变得不规律，系泊系统提供的回复力对涡激运动幅值有抑制作用，来流角和流速对张力腿或立管模态影响明显。论文得到结论对于张力腿平台的工程设计有一定借鉴意义。

Model test and numerical analysis of TLP vortex-induced motion

In order to obtain the TLP vortex-induced motion response mechanism, the method of combining numerical simulation and model experiment was used to study the response of TLP vortex-induced motion in a full-water depth mooring.According to the main scale parameters of TLP, the test model was made according to the geometric similarity. And under the conditions of similar motion and similar dynamics, a joint model test of uniform flow, profile flow and wave flow was carried out. The model test results were compared with the numerical simulation results to verify the consistency between the numerical simulation and the model test. The analysis results show that the locking interval of TLP vortex-induced motion is 5.5<U_r<8.5, and the incoming flow angle has a greater impact on the vortex-induced motion. The vortex-induced motion law of the platform under the action of the profile flow is basically consistent with that of the uniform flow. However, the energy dispersion caused by Creating profile flow makes the motion trajectory of the platform in the XY plane irregular. The restoring force provided by the mooring system has an inhibitory effect on the amplitude of vortex-induced motion. Incoming flow angle and flow velocity have obvious influence on tension leg or riser mode. The conclusions obtained from the research have certain reference significance for the research and design of TLP.