The Hydrodynamic Interaction Between Underwater Vehicle And Support Ship In Waves

As a kind of agile underwater transporter, underwater vehicle with high performance which can manage many tasks for resource exploring, scientific researching, life rescuing and so on is drawing more attentions. When the underwater vehicle is closing the support ship or platform, its hydrodynamic performance will be explicitly affected by surroundings due to the large differentiation of the dimensions and wave. There will be compulsive and attractive force on underwater vehicle due to the adjacent structure. So that's useful to guarantee the sea keeping and operating performances and safety by studying the hydrodynamic interaction effect applying proper theory.Since 3-D panel method was pronounced developed by recent years, in this article, hydrodynamic problem is described by the accumulation of several source distribution models, different status including multiple regular shape structures and side by side ships in waves are investigated by solving frequency domain 3-D free surface green function, most calculations are performed by HydroSTAR software, results are compared with those from other methods to certify the property of applied method. Hydrodynamic performance of some regular shape structures like box and spheroid are calculated to investigate disturbing effect on submerged bodies from adjacent floating structure. For underwater vehicle, different factors such as dimensions of support ship, positions relative to support ship and wave conditions are considered, hydrodynamic coefficients, motion response, exciting force and second order wave force of underwater vehicle are calculated and compared. Satisfactory arrangement schemes to launch and callback the vehicle are proposed finally, detailed hydrodynamic predictions and spectral analysis are given.