Time-Domain Aerodynamic Analysis for Floating Bridges

The structural performance of floating bridges is strongly influenced by wind and wave interactions, requiring time-domain analysis to accurately capture these effects. Conventional frequency-domain approaches fail to account for nonlinear aerodynamic forces, flutter derivatives, and large displacement effects, leading to potential inaccuracies in predicting bridge behavior. This study presents a novel time-domain aeroelastic analysis method developed by ABAQUS User Subroutine to compute nonlinear aerodynamic forces at each time step. The methodology is validated through numerical simulations, comparing results against MATLAB-based time-domain analysis to ensure accuracy. The developed method successfully captures the nonlinear aerodynamic effects, demonstrating its effectiveness in predicting flutter phenomenon and structural response. The proposed approach is expected to advance computational modeling for floating bridges, offering a robust solution for wind-wave interaction analysis and improving the design of long-span structures in complex environmental conditions.