반잠수식 플랫폼 주위의 비선형 런업에 관산 수치해석

Abstract

For a semi-submersible platform with shallow draft, it is important to estimate wave run-ups accurately in order to fulfill requirements of the positive air gap below the deck. In this study, a Cartesian-grid based flow simulation method is applied to compute the nonlinear wave run-ups on a semi-submersible platform. The present simulation method solves the two-phase Navier-Stokes equations using finite volume discretization with a volume-of-fluid (VOF) method. Focus is made on nonlinear characteristics of wave run-ups along a semisubmersible structure with two columns and a submerged pontoon. Numerical results are validated by comparing with model test data. Through a series of numerical calculations, nonlinear characteristics ofwave elevation, run-up and forces are discussed. applied to compute the nonlinear wave run-ups on a semi-submersible platform. The present simulation method solves the two-phase Navier-Stokes equations using finite volume discretization with a volume-of-fluid (VOF) method. Focus is made on nonlinear characteristics of wave run-ups along a semisubmersible structure with two columns and a submerged pontoon. Numerical results are validated by comparing with model test data. Through a series of numerical calculations, nonlinear characteristics ofwave elevation, run-up and forces are discussed.