WRF-CFD/CSD analytical method of hydroelastic responses of ultra-large floating body on maritime airport under typhoon-wave-current coupling effect

Abstract

Accurate prediction of dynamic responses of the ultra-large floating body on maritime airportto extreme marine environments like typhoons is the key premise to guaranteeing its safety performances. In this study, a WRF-CFD/CSD analytical method of hydroelastic responses of the ultra-large floating body on Maritime airport based on mesoscale and small-scale nesting is proposed. Firstly, WRF-SWAN-FVCOM coupling simulation is realized based on the secondary development of the MCT platform. The typhoon-wave-current spatial-temporal evolution laws when the “Meranti” went through the ultra-large floating body on maritime airport are analyzed. Hydrodynamic and aerodynamic forces are calculated by the medium/small scaled flow field nesting technology, which is brought into the structural dynamic equation for two-way iterative decoupling solving. Finally, hydroelastic responses of the floating bodies under typhoon-wave-current coupling effect and influencing mechanism are analyzed by case study. Research conclusions demonstrate that the proposed method can predict hydroelastic responses of the maritime airport under the action of typhoons, waves, and currents effectively. The typhoon field will significantly increase the vertical displacement plus deformation of the structure and the extreme negative pressure of the superstructure, which can provide a reference for the design and construction of maritime airports under typhoon conditions.