12 砕氷船の性能評価を目的とした船体周り氷片挙動シミュレータの開発

概要

論文の詳細を見る
To estimate the performance and risk of an icebreaker, we are developing a numerical simulator for icebreaker performance under conditions that many ice pieces colliding and scraping against the icebreaker hull. Open Dynamics Engine (ODE) is incorporated into our simulator to allow the use of physically based modeling to illustrate these mutual interactions. We carry out pre-sawn ice test in the ice model basin of National Maritime Research Institute, and compare its result with simulation results to verify the numerical method. In the simulation, virtual fluid force acts on each ice piece to reproduce ship advance. Buoyancy with static pressure is also considered. Coefficient of restitution is set to zero and friction coefficient between ice pieces is set to 1.35. Ice motion in the simulation generally agrees with the experimental results. Appropriate relaxation parameter for virtual fluid force is investigated.