Instantaneous Morison Equation Force Coefficients Computation

Abstract

This research hypothesized that the use of conventional time invariant drag and inertia coefficients in the Morison equation for dynamic wave force simulation is incorrect. These coefficients are obtained via period averaging regression analysis techniques that efface the subperiodic fluctuation in the flow and pressure fields adjacent to structural members. Computer programs were written to develop a set of instantaneous drag and inertia coefficients for use in conjunction with the Morison equation to retain this subperiodic information. The results of this effort are inconclusive due to the computation of some negative instantaneous drag coefficients from ostensibly reliable well conditioned wave force experimental data.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1988
Accession Number
ADA200038

Entities

People

  • J. Dummer

Organizations

  • Naval Facilities Engineering Service Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Civil Engineering
  • Computer Programs
  • Computers
  • Data Acquisition
  • Databases
  • Dynamic Loads
  • Engineering
  • Equations
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Frequency Domain
  • Froude Number
  • Measurement
  • Offshore Structures
  • Regression Analysis

Readers

  • Fluid Dynamics.
  • Systems Analysis and Design