슬러싱문제에 대한 수치해석

Abstract

A sloshing phenomenon in a liquid storage tank is numerically simulated. In nature a sloshing problem in a liquid storage tank or a cooling water tank in a nuclear power plant can cause a severe disaster during an earthquake, or an excessive motion of a oil tanker at sea. During excessive sloshing, the sloshing-induced impact load can cause a critical damage on the tank structure. Recently, this problem becomes an important issue in FPSO (Floating Production Storage Offloading) design. A three-dimensional free surface flow in a tank is formulated in the scope of potential flow formulation with the nonlinear free surface conditions. A finite-element method based on Hamilton’s principle is employed as a numerical scheme. The problem is treated as an initial-value problem. The nonlinear problem is numerically solved through an iterative method at each time step. In the computations the hydrodynamic loading on the pillar in the tank is obtained. The computed results are compared with previous results obtained by others.