Numerical simulation of large amplitude ship motions and applications to ship design and safe operation

Abstract

In this thesis, a time domain hybrid method is developed to study the seakeeping behavior of ships and floating structures in waves (at zero and nonzero forward speed). The thesis deals with three different basic solution approaches to the set problem, namely, a time domain transient Green function solver and alternatively a time domain hybrid solver for zero speed problems, v Acknowledgement Six years ago in 2004, when the NTUA-Harbin Engineering University ASIA LINK project "Knowledge transfer on ship design, production and operation" was initialized, I made up my mind to come to NTUA-Athens for pursuing scientific progress and finally made the trip late of 2005. Five years later, at this moment, while I am ready for the examination by my PhD committee, I look back on these years" experience and notice that there are many people I am grateful to during this route. My special thanks go to Professor A. Papanikolaou who has been a great supervisor, not only on my study but also on my life. From the night I arrived to Athens until now, he has been continuously guiding and supporting me, either scientifically or financially, to progress in the right direction.

A practical method for predicting the propulsive performance of energy efficient ship with wave devouring hydrofoils at actual seas

“…Figures 3–5 show the comparison result of heave, pitch and wave added resistance response amplitude operators (RAOs), respectively. In these figures, “Cal” denotes the present calculation, where the hydrodynamic coefficients of S175 are computed using a 3D Green Function–based panel method; “Exp” denotes the present experimental results and “(Liu, 2011)” denotes the S175 experimental results from the study by Liu 19 with wave length up to 2.5 ship length. The results are nondimensionalized as shown in the y -axis; $\lambda$ in the x -axis denotes the wave length.…”

A New Model Uncertainty Measure of Wave-Induced Motions and Loads on a Container Ship with Forward Speed

“…Many researchers claimed that evaluating the forward speed Green function in the time domain is computationally simpler than in the frequency domain [7,32,36,[40][41][42]. Lin and Yue [43] applied a transient Green function to satisfy the exact body boundary condition on the instantaneous free surface, while the free surface boundary condition remained linearized on the calm water surface. Lin et al [44] extended this method to solve for a free surface boundary condition linearized about the incident wave.…”