Fluid-Structure Interaction Simulation Of Submerged Floating Tunnels

. A two-dimensional section model of the submerged tunnel problem is analyzed with the multiphysics finite element code SPECTRUM. The model consist of a circular cylinder submerged in sea water and subjected to constant current and regular waves. The waves are modeled by prescribing the velocity profile along the inflow boundary according to linear wave theory and by using free surface boundary conditions on the water surface. Structural boundary conditions are consistent with a global model of the submerged tunnel. A detail description of the computational model and the solution strategy that is used to solve this problem is given. The global response parameters of the cylinder (force coefficients, displacements, velocities and accelerations) obtained from the FSI-simulations are compared with a global nonlinear analysis of the tunnel using simplified models for representing the environmental loads. Knut M. Okstad, Terje Haukas, Svein Remseth and Kjell M. Mathisen 1 INTRODUCTION Be..