Offshore oil and gas production relies on subsea, fixed platforms. In many deep-water projects in remote field locations, floating production storage and offloading (FPSOs) vessels are used. One challenge in harsh operating conditions is rough sea conditions. In the past, time-consuming and expensive physical experiments were required to ensure that vessels can withstand the highest possible sea states without damage. Petrobras uses ANSYS simulation to reduce the number of experiments required and obtain more detailed loading data.