Open AccessWAVE FORCES ON SUBMERGED OBJECTS
Author(s) -
Suphat Vongvisessomjai,
Richard Silvester
Publication year - 1976
Publication title -
proceedings of conference on coastal engineering/proceedings of ... conference on coastal engineering
Language(s) - English
Resource type - Journals
eISSN - 2156-1028
pISSN - 0589-087X
DOI - 10.9753/icce.v15.139
Subject(s) - morison equation , dimensionless quantity , drag , inertia , wave height , airy wave theory , classical mechanics , mechanics , range (aeronautics) , physics , barge , diffraction , breaking wave , engineering , wave propagation , stokes wave , marine engineering , optics , thermodynamics , aerospace engineering
Limitations of the Morison equation for computing wave forces on small submerged structures have encouraged the use of dimensionless relationships containing only height, period and water depth. However in dividing the force by the theoretical drag force or inertia force a relationship can be found with the Keulegan parameter (U. T/D) over a wide range of conditions and different types of wave. The U. value can be determined from empirical and theoretical data for all depths and wave steepnesses. The relating coefficients for various dimensions and shapes of submerged object are predictable from potential theory or modified slightly because of viscous and such other forces induced by bottom and free surface boundaries. For computing wave forces on a submerged object which is large compared to the wave length, the Morison equation is replaced by the Diffraction theory. Criteria for selecting the latter theory are presented.