모리슨 항력을 고려한 파랑 중 TLP 거동 특성 연구

Abstract

A numerical method to investigate the non-linear motion characteristics of a TLP is established. A time domain simulation thatincludes the memory effect using the convolution integral is used to consider the transient effect of TLP motion. The hydrodynamic coefficients andwave force are calculated using a potential flow model based on the HOBEM(higher order boundary element method). The viscous drag force actingon the platform and tendons is also considered by using Morison’s drag. The results of the present numerical method are compared withexperimental data. The focus is the nonlinear effect due to the viscous drag force on the TLP motion. The ringing, springing, and drift motion aredue to the drag force based on Morison's formula.