沉管管节浮运过程中波浪附加阻力的水动力学分析

波浪引起的附加阻力是管节海上浮运过程中总阻力的重要组成。采用基于势流理论的水动力学软件AQWA计算了管节浮运过程中的波浪附加阻力。通过建立管节及附属结构的三维有限元模型，确定管节的几何、物理性质，建立湿表 面模型进行水动力学分析。对影响附加阻力的各因素，包括水深、航速、波浪谱及波浪要素等，进行了参数敏感性分析。计算结果表明，采用P-M谱的计算值较采用JONSWAP谱有所不同，附加阻力随水深增加而减小，阻力值与波浪周期及波浪入射角均有一定的关系，与波浪高度的平方成正比，且与拖航速度成正比。

Hydrodynamic analysis of added resistance in waves of immersed tunnel elements during floating transportation

The added resistance in waves is an important component of total resistance during floating transportation of immersed tunnel elements on the sea. The added resistance was calculated by hydrodynamics simulation software AQWA based on the potential flow theory. The geometrical and physical characteristics were decided by the 3D finite element model of the element and attachment structures, then a wetted surface model of the tunnel element was established to carry out the hydrodynamic analysis. Finally, the sensitivity analysis of parameters including depth of water, towing speed, wave spectrum and characteristics was made. The numerical results suggest that the added resistance when applying the P-M spectrum is greater than the results obtained from the JONSWAP spectrum, decreases with the increase of water depth, may be related to periods and directions of waves, is proportional to the square of wave height and proportional to towing speed as well.