考虑海底地形影响的三模块超大型浮体水弹性响应分析

Hydroelastic Analysis of a 3-module VLFS Considering the Effect of Complex Seabed Topography

基于Boussinesq方程和经典水弹性理论,提出一种可预报布置在近岸或岛礁附近浮式结构物水弹性响应的直接耦合分析方法。文中给出了详细的理论推导、数值求解方法和相应的计算程序THAFTS-BR。基于该程序对均匀和不均匀海底地形条件下三模块超大型浮体运动和连接器载荷响应进行了计算并与相应的水池模型试验结果进行了对比。结果表明,复杂海底地形对超大型浮体的动响应有重要影响。文中给出的结论可为复杂海底地形下多模块超大型浮体及其连接器的动响应分析、设计与制造提供参考。

Based on the Boussinesq equation and traditional hydroelasticity theory,a direct coupling analysis method(DCAM)was proposed to predict the hydroelastic responses of floating structures deployed near seashore or islands.The detailed theoretical derivation,numerical solution method and the relevant calculation program THAFTS-BR were also completed.The motions and connector loads of a 3-module VLFS under an even and uneven seabed using the proposed method were verified against the experimental results.The comparative analysis showed that the complex seabed topography had an important influence on the responses of the VLFS near an island.Some useful conclusions given in this paper can provide a reference for the analysis of dynamic responses,design and construction of the multi-module VLFS and its connectors under the complex seabed topography.