HELMHOLTZ RESONANCE OF HARBOURS
The resonant response of a harbour H of depth scale d and area A to excitation of frequency omega through a mouth of width a is calculated. The results are relevant to the tsunami response of narrow-mouthed harbours. It is assumed that an adequate approximation to the radiation impedance of the external domain is available. Several examples are considered, including a model of Long Beach Harbor, for which the calculated resonant frequency of the dominant mode is within 1% of the measured value. The effects of entry-separation and bottom-friction losses are considered; the latter are typically negligible, whereas the former may be comparable with, or dominate, radiation losses.
- Also published in Journal of Fluid Mechanics, V67, Pt 3, pp 445-464, 1975.
University of California, San DiegoLa Jolla Institute of Geophysics and Planetary Physics
La Jolla, CA USA
- Miles, J W
- LEE, Y K
- Publication Date: 1974-4-15
- Pagination: 20 p.
- TRT Terms: Harbors; Shore protection; Structural models; Vibration
- Old TRIS Terms: Harbor models; Harbor storm protection; Wave excited vibration
- Subject Areas: Bridges and other structures; Marine Transportation; Terminals and Facilities;
- Accession Number: 00098785
- Record Type: Publication
- Source Agency: National Technical Information Service
- Contract Numbers: N00014-69A-0200-6005, NSF-GA-35396X
- Files: TRIS
- Created Date: Aug 13 1975 12:00AM