Linear and nonlinear ship motions at zero speed in random waves

摘要

The present work concentrates on ship motion in random waves. The seakeeping performance of a typical tanker is observed in irregular waves, in particular severe ocean conditions. The computational tool is LAMP, which adopts the three-dimensional time-domain panel method. The numerical computation was carried out both the linear and nonlinear methods, and the results are compared. The statistical properties of random response are summarized, and the computation is extended to the prediction of green water. The result shows that the nonlinear effects are important in severe ocean condition, especially for the wave-induced structural loads