内孤立波作用下水下潜器的载荷特性数值分析

为了研究海洋内孤立波作用下潜器的载荷特性,以RANS方程为控制方程,依据Kdv,eKdv和mKdv三类内孤立波理论计算速度入口,建立两层流体中内孤立波与水下潜器相互作用的数值模拟方法,计算分析内孤立波作用下潜器的水平力、垂向力和力矩的变化规律.结果表明,数值模拟得到的内孤立波波形及振幅与其对应理论解和文献中实验结果吻合良好.潜器的受力变化规律与内孤立波波幅、上下层水深比和潜器潜深有关.

Numerical simulation for the load of internal solitary waves acting on a submerged body

In order to investigate the load of internal solitary waves acting on a submerged body,a numerical method based on the RANS equation in a two-layer fluid is presented to simulate the interaction of internal solitary waves with a submerged body,where the velocity-inlet boundary is calculated by the three types of internal solitary waves theories including KdV,eKdV and mKdv.The regular pattern of the horizontal force,vertical force and moment of the submerged body under internal solitary wave is calculated and analyzed.The results show that wave profile and amplitude of the internal solitary waves based on the present numerical method are in good agreement with the experimental and theoretical results presented in published papers.The variation of the load is related to the amplitudes of the internal solitary waves,the upper and lower depth and the location of the submerged body.