Hydrodynamic interactions of water waves with a group of independently oscillating truncated circular cylinders

摘要

In this study, we examine the water wave radiation by arrays of truncated circular cylinders. Each cylinder can oscillate independently in any rigid oscillation mode with a prescribed amplitude, including translational and rotational modes such as surge, sway, heave, pitch, roll, and their com-binations. Based on the eigenfunction expansion and Graf ’s addition theorem for Bessel functions, we developed an ana-lytical method that includes the effects of evanescent modes in order to analyze such arrays of cylinders. To investi-gate the effects of several influential factors on convergence, our objective is to dramatically reduce the number of tests required and determine the influencing relationships between truncation number and convergence behavior for different factor combinations. We use the orthogonal test method to fulfill the objective. Lastly, we present our results regarding the effects of evanescent modes on hydrodynamic coeffi-cients.