Accession Number:

AD0625385

Title:

SHIP HULL VIBRATIONS - 9: A GUIDE FOR DESIGN STAGE CALCULATIONS OF PROPELLAR EXCITED VIBRATIONS,

Descriptive Note:

Corporate Author:

CONESCO INC CAMBRIDGE MASS

Personal Author(s):

• Bradshaw,R. T.

Report Date:

1965-12-01

Pagination or Media Count:

79.0

Abstract:

The guide is intended for the design engineer who is faced with the problem of estimating the vibratory response of a ships hull to excitations originating at the propeller. A number of methods for calculating the forces and moments associated with propeller action are presented and methods for computing hull amplitudes are described. The methods selected are intended to be complementary, the simpler ones being appropriate in the early design stages or whenever few details are known, while the more elaborate methods are appropriate when full information on hull structure, propeller particulars, and wake characteristics are available. As far as possible, the procedures were adapted for use with slide rule or desk calculator, however, in a few instances machine calculation is essential. In view of this a summary of computing equipment available at the various naval shipyards is included.

Descriptors:

• *SHIP HULLS
• *MARINE PROPELLERS
• VIBRATION
• VIBRATION
• PRESSURE
• HANDBOOKS
• WAKE
• LOADS(FORCES)
• MATHEMATICAL ANALYSIS

Subject Categories:

• Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE