Source Level Model for Propeller Blade Rate Radiation for the World's Merchant Fleet.

Abstract

This memo presents a model for the acoustic source strength of blade rate line energy produced by single screw merchant vessels. These source strengths are based on observed cavitation time histories on merchant vessels, and on limitations imposed by considerations of propeller design procedures and ship vibration criteria. Relationships are presented for the expected value of the blade rate source strength for ships of different lengths, expressed both as a monopole source strength located a known depth below a free surface; and as a dipole source strength which describes the pressure radiated to the far field. These relationships are based on a small sample of merchant ships characteristics and are exercised for the estimated population of ships at sea to yield a statistical description of the distribution of source strength for the world fleet of single screw merchant vessels. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1978
Accession Number
ADA063866

Entities

People

  • D. Greeley
  • L. Gray

Organizations

  • BBN Technologies

Tags

DTIC Thesaurus Topics

  • Acoustic Measurement
  • Ambient Noise
  • Engineers
  • Frequency
  • Marine Propellers
  • Measurement
  • Merchant Vessels
  • Naval Architecture
  • Probability
  • Probability Density Functions
  • Propeller Blades
  • Propellers
  • Radiation
  • Random Variables
  • Research Facilities
  • Ship Design
  • Standards

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Mechanical Engineering/Mechanics of Materials.
  • Naval Architecture and Marine Engineering.