Multi-Parameter Influence Analysis of Interaction Between Internal Solitary Wave and Fixed Submerged Body

To obtain the interaction characteristics between Internal solitary waves (ISWs) and submerged bodies, a three-dimensional numerical model for simulating ISWs was established in the present study based on the RANS equation. The velocity entrance method was adopted to generate the ISWs. First, the reliability of this numerical model was validated by comparing it with theoretical and literature results. Then, the influence of environmental and navigation parameters on interactions between ISWs and a fixed SUBOFF-submerged body was studied. According to research, the hydrodynamic performance of the submerged body has been significantly impacted by the ISWs when the body is nearing the central region of the wave. Besides, the pitching moment (y′) will predominate when the body encounters the ISWs at a certain angle between 0° and 180°, and the lateral force is larger than the horizontal force. Additionally, the magnitude of the force acting on the body is mostly affected by the wave amplitude. The variation of the vertical force is the main way that ISWs affect the hydrodynamic performance of the bodies. The investigations and findings discussed above can serve as a guide to forecast how ISWs will interact with submerged bodies.