WAVE FORCES ON A STATIONARY PLATFORM OF ELLIPTICAL SHAPE

Exciting forces and moments due to plane incident waves on a stationary platform are studied in the report. The platform is a vertical cylinder with a finite draft and elliptical cross section. The mathematical solution to the diffraction problem is obtained on the basis of the linearized long-wave approximation. Numerical results via Mathieu functions are presented for a shiplike body with beam-to-length ratio approximately equal to 0.2. Various draft-to-depth ratios and angles of incidence are considered. Results have been checked with the limiting case of a circular cylinder for the long-wavelength range. Aside from its own practical interest, the present theory provides a basis for comparison with other approximate theories of slender-body type and serves as a prelude to the corresponding calculations for arbitrary wavelengths. (Author)

• Supplemental Notes:
  • Availability: Pub. in Jnl. of Ship Research, v17 n2 p61-71 Jun 73.
• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Civil Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Chen, H S
  • Mei, C C
• Publication Date: 1972-8-14

Media Info

• Pagination: 22 p.

Subject/Index Terms

• TRT Terms: Cylindrical bodies; Engineering moments; Force; Hydrodynamics; Moorings; Navigation; Ocean waves; Ship motion; Ships; Special functions (Mathematics); Water waves; Waves
• Uncontrolled Terms: Shallow water
• Old TRIS Terms: Force mechanics; Mathieu functions; Moments; Shallow water effects; Special functions mathematical; Thin ship theory; Wave forces on structures
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Terminals and Facilities; Vehicles and Equipment;

Filing Info

• Accession Number: 00048402
• Record Type: Publication
• Source Agency: National Technical Information Service
• Contract Numbers: N00014-67-A-0204-003
• Files: TRIS
• Created Date: Nov 14 1973 12:00AM