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Very large floating structures (VLFS) Part II
Marine Structures 14 (2001) 3}4
Editorial
Very large #oating structures (VLFS) Part II Very large #oating structures such as #oating airports or mobile o!shore bases may require structural and hydrodynamic methods of analysis that di!er from those used for conventional marine structures. For example, because of the impact of geometry and size, very large #oating structures may require hydroelastic analysis to account properly for the interaction between the structure and the #uid. The #exibility of these structures may result in natural frequencies that can be excited by the energy present in the high-frequency tail of a wave spectrum. In addition, structural failure mechanisms, which are essential for reliability analysis, can be quite di!erent from those failure mechanisms of conventional marine structures due to the impact of size, geometry, load distribution and joint connectors if present. The papers are selected from a large number of papers that were presented at the Third International Workshop on Very Large Floating Structures (VLFS '99) in Honolulu, Hawaii, 22}24 September 1999. The papers will be published in two separate double issues of the journal Marine Structures; Part I published as Volume 13 Nos. 4 and 5 with Part II published herein as Volume 14 Nos. 1 and 2. The papers contained in these special issues discuss methods of analysis and design of large #oating structures. The First International Workshop on Very Large Floating Structures (VLFS '91) was also held in Honolulu, 24}26 April 1991, and a group of selected papers were presented in a special issue of the Journal of Marine Structures (Vol. 6, Nos. 2 and 3, 1993). The First Workshop was primarily sponsored by the US National Science Foundation. The Second Workshop on Very Large Floating Structures took place in Hayama, Japan, 25}28 November 1996 and was primarily sponsored by the Ship Research Institute, Ministry of Transport of Japan. The Third Workshop was primarily sponsored by the Mobile O!shore Base (MOB) program of the O$ce of Naval Research, US. The strong interest in very large #oating structures as evidenced by the large number of papers contained in the proceedings of these workshops is a result of a need to utilize e!ectively the ocean space for transportation, industrial use, storage, habitats, military bases and waste disposal, among others. A number of disciplines are of considerable interest for the development of very large #oating structures. These include ocean waves, hydrodynamic loads, structural response, hydroelasticity, structural reliability and development of design criteria. The papers selected and reviewed in this special issue of the Journal of Marine Structures discuss these topics and are written by both academics and practicing professionals who are recognized as experts 0951-8339/01/$ - see front matter 2001 Published by Elsevier Science Ltd. PII: S 0 9 5 1 - 8 3 3 9 ( 0 1 ) 0 0 0 0 4 - 1
4
Editorial / Marine Structures 14 (2001) 3}4
in their "elds. It is hoped that these papers will improve our understanding of the behavior of very large #oating structures. R. Cengiz Ertekin Jang Whan Kim Koichiro Yoshida Alaa E. Mansour Department of Ocean Engineering, SOEST, University of Hawaii at Manoa, 2540 Dole Street, Holmes Hall 402, Honolulu, HI-96822-2303, USA Tokai University, Japan University of California at Berkeley, USA
Editorial
Very large #oating structures (VLFS) Part II Very large #oating structures such as #oating airports or mobile o!shore bases may require structural and hydrodynamic methods of analysis that di!er from those used for conventional marine structures. For example, because of the impact of geometry and size, very large #oating structures may require hydroelastic analysis to account properly for the interaction between the structure and the #uid. The #exibility of these structures may result in natural frequencies that can be excited by the energy present in the high-frequency tail of a wave spectrum. In addition, structural failure mechanisms, which are essential for reliability analysis, can be quite di!erent from those failure mechanisms of conventional marine structures due to the impact of size, geometry, load distribution and joint connectors if present. The papers are selected from a large number of papers that were presented at the Third International Workshop on Very Large Floating Structures (VLFS '99) in Honolulu, Hawaii, 22}24 September 1999. The papers will be published in two separate double issues of the journal Marine Structures; Part I published as Volume 13 Nos. 4 and 5 with Part II published herein as Volume 14 Nos. 1 and 2. The papers contained in these special issues discuss methods of analysis and design of large #oating structures. The First International Workshop on Very Large Floating Structures (VLFS '91) was also held in Honolulu, 24}26 April 1991, and a group of selected papers were presented in a special issue of the Journal of Marine Structures (Vol. 6, Nos. 2 and 3, 1993). The First Workshop was primarily sponsored by the US National Science Foundation. The Second Workshop on Very Large Floating Structures took place in Hayama, Japan, 25}28 November 1996 and was primarily sponsored by the Ship Research Institute, Ministry of Transport of Japan. The Third Workshop was primarily sponsored by the Mobile O!shore Base (MOB) program of the O$ce of Naval Research, US. The strong interest in very large #oating structures as evidenced by the large number of papers contained in the proceedings of these workshops is a result of a need to utilize e!ectively the ocean space for transportation, industrial use, storage, habitats, military bases and waste disposal, among others. A number of disciplines are of considerable interest for the development of very large #oating structures. These include ocean waves, hydrodynamic loads, structural response, hydroelasticity, structural reliability and development of design criteria. The papers selected and reviewed in this special issue of the Journal of Marine Structures discuss these topics and are written by both academics and practicing professionals who are recognized as experts 0951-8339/01/$ - see front matter 2001 Published by Elsevier Science Ltd. PII: S 0 9 5 1 - 8 3 3 9 ( 0 1 ) 0 0 0 0 4 - 1
4
Editorial / Marine Structures 14 (2001) 3}4
in their "elds. It is hoped that these papers will improve our understanding of the behavior of very large #oating structures. R. Cengiz Ertekin Jang Whan Kim Koichiro Yoshida Alaa E. Mansour Department of Ocean Engineering, SOEST, University of Hawaii at Manoa, 2540 Dole Street, Holmes Hall 402, Honolulu, HI-96822-2303, USA Tokai University, Japan University of California at Berkeley, USA