NUMERICAL COMPUTATIONS FOR A SLOSHING PROBLEM

摘要

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