文献类型：期刊文献

英文题名：Three-Dimensional Numerical Simulation of the Vortex-Induced Motion Response of Semi-Submersible Platforms Under Wave-Current Coupling Effect

作者：Yin, Yankun[1,2];Yan, Jin[1,3,4];Deng, Chushan[4];Zhang, Dapeng[3,4]

机构：[1]Guangdong Ocean Univ, Coll Mech Engn, Zhanjiang 524088, Peoples R China;[2]CNOOC China Ltd Zhanjiang, Zhanjiang 524057, Peoples R China;[3]Guangdong Ocean Univ, Guangdong Prov Key Lab Intelligent Equipment South, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Coll Naval Architecture & Shipping, Zhanjiang 524088, Peoples R China

年份：2025

卷号：13

期号：3

外文期刊名：JOURNAL OF MARINE SCIENCE AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001453299400001)、、EI(收录号：20251318138502)、Scopus(收录号：2-s2.0-105001175835)、WOS

基金：The authors gratefully acknowledge the support provided for this research by the Natural Science Foundation of Guangdong Province (2022A1515011562) and Guangdong Provincial Special Fund for promoting high-quality economic development (Yuerong Office Letter [2020]161).

语种：英文

外文关键词：semi-submersible; wave-current coupling; vortex-induced motion; numerical simulation

外文摘要：The vortex-induced motion response of semi-submersible platforms can result in fatigue damage to the mooring and riser systems, thereby compromising production safety. Consequently, investigating the characteristics and mechanisms of vortex-induced motion response under complex marine environments holds significant importance in the field of offshore engineering. This study utilizes the SA-DES numerical simulation method to establish a fluid-structure coupling model that simulates the vortex-induced motion of semi-submersible platforms under uniform flow and wave-current interactions, with a focus on key parameters such as response amplitude, frequency, and fluid forces. To ensure the accuracy of the simulations, the numerical model aligns with the physical model tests in terms of dimensions and environmental conditions. The numerical results demonstrate a strong correlation with experimental data under both uniform flow and wave-current coupling conditions, confirming the model's validity. The results reveal a significant "LOCK-IN" phenomenon occurring within reduced velocity (dimensionless velocity, the ratio of velocity to characteristic length) range of 6 to 8 under uniform flow conditions, with the response amplitude at an incoming flow angle of 45 degrees exceeding that at 0 degrees. In wave-current coupling conditions, the response amplitude is generally lower than that observed under uniform flow, indicating that the presence of waves attenuates the vortex-induced motion. Furthermore, the frequency of the vortex-induced motion is found to be similar to the natural frequency of the platform's transverse motion, suggesting that the vortex-induced motion may be attributed to a resonance phenomenon induced by pulsating lift force from vortex shedding. These findings validate the effectiveness and accuracy of the SA-DES numerical simulation method in predicting the vortex-induced motion of semi-submersible platform.