RESONANT RESPONSE OF HARBOURS: AN EQUIVALENT-CIRCUIT ANALYSIS

The surface-wave response is considered of a harbour to a prescribed, incident wave in an exterior half-space on the hypotheses of linearized, shallow-wave theory, an ideal fluid, and a narrow mouth. It appears worthwhile to invoke the equivalent-circuit techniques that have proved so efficient in attacking analogous problems in acoustics and electromagnetic theory. These techniques offer significant advantages in practice: (i) the sub-problems of external radiation, channel coupling, and internal resonance may be attacked separately; (ii) the equivalent-circuit parameters may be expressed as homogeneous, quadratic forms that may be simply approximated without solving the complete boundary-value problem; (iii) observed values (including those from model experiments) of dominant parameters, such as resonant frequencies, may be incorporated in preference to, or in place of, theoretical values; (iv) empirically determined dissipation parameters (resistances) may be incorporated; (v) analogue computation, both conceptual and electrical, may be invoked to expedite understanding of the resonant response. (Author)

• Supplemental Notes:
  • Revision of Report dated 27 Apr 70. Published in Jul of Fluid Mechanics, V46, Pt 2, pp241-265, 1971
• Corporate Authors:

  University of California, La Jolla

  La Jolla Institute of Geophysics and Planetary Physics
  San Diego, CA  United States 
• Authors:
  • Miles, J W
• Publication Date: 1970-9-16

Media Info

• Pagination: 26 p.

Subject/Index Terms

• TRT Terms: Force; Rayleigh waves; Waves
• Old TRIS Terms: Surface wave effects; Wave effects; Wave forces on structures
• Subject Areas: Marine Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 00019401
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Reprint
• Contract Numbers: N00014-69A-4200-6005
• Files: TRIS
• Created Date: Nov 19 1973 12:00AM