1. Mechanical Engineering Department, Worcester Polytechnic Institute, 100 Institute Road,Worcester, MA 01609
2. Centre for Ships and Ocean Structures & Department of Mathematical Sciences, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway
3. Otto-von-Guericke-Universität Magdeburg,Institut für Mechanik, PF 4120,39106 Magdeburg, Germany