Abstract
The present paper is concerned with the wave response on relaxation moored two floating type architectures in coastal zone. On evaluation of wave response of floating bodies, the effects of hydrodynamic interaction and reflection wave due to quay were discussed by using the numerical results. Furthermore, the responses on motion and tension of mooring line were calculated by numerical simulation considering the nonlinearity of wave exciting forces and mooring system, and the nonlinear effects on motion and tension of mooring line were made clear.