A COMPUTING METHOD FOR THE ANALYSIS OF WATER IMPACT OF ARBITRARY SHAPED BODIES (2ND REPORT). APPLICATION FOR THE OPTIMIZATION OF HORIZONTAL MEMBERS OF OFFSHORE STRUCTURES

This paper describes an optimization of the cross sectional shape of the horizontal members of offshore structures from the view point of slamming. Investigations were performed using the numerical method presented in the first report, for the analysis of water impact of arbitrary shaped bodies. Water impact on a circular cylinder was studies numerically to clarify the mechanism of slamming on the existing structural members. Alternative cross sectional shapes for the horizontal members were obtained by an analysis based on the momentum theory associated with the concept of added mass. The results were checked by numerical simulations. The analyses showed that cylinders with parabolic section minimize total impact force. Finally, the acceptable range of angle of the parabolic section to the water surface was determined. The cross sectional shapes obtained can be reasonable alternatives for the horizontal members of offshore structures.

• Supplemental Notes:
  • J Soc Naval Arch Japan, v 177, June 1995, p 91 [9 p, 6 ref, 17 fig]
• Authors:
  • Arai, M
  • Cheng
  • L-Y
  • INOUE, Y
• Publication Date: 1995

Language

• English

Subject/Index Terms

• TRT Terms: Cylindrical bodies; Impact loads; Numerical analysis; Offshore structures; Slamming
• Subject Areas: Bridges and other structures; Marine Transportation;

Filing Info

• Accession Number: 00717757
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Mar 4 1996 12:00AM