The Wind Load Prediction of Asymmetric Semi-submersible Lifting Platform based on CFD

Zhenqiu Yao, Xiangyu Tang, Hongjie Ling

In order to accurately predict the wind load of asymmetric marine structures, the 3d model of an asymmetric semi-submersible lifting platform was established by using SolidWorks software in this paper .The wind load based on 1:25 scale model was numerically predicted by using CFD software FINE/MARINE .The numerical simulation wind load is converted into the actual value through the similarity theory, and compared with the calculated value of CCS specification. The results show that The change trend of longitudinal force and transverse force of wind direction Angle of 0°~180° and 180°~360° basically remains the same, but the values are not the same due to the asymmetry of the platform. In addition ,  the standard calculation method cannot fully consider the effect of shading effect among the superstructure components, so the result is larger than the numerical simulation value. When the fluid meets the vertical windward surface of the superstructure, its velocity will plummet and flow into all directions. This paper provides an effective method for wind load prediction of asymmetric Marine structures and has certain reference value for the design and research of asymmetric semi-submersible lifting platform.

https://dx.doi.org/10.31873/IJEAS.6.6.2019.14