Accession Number:

AD0270655

Title:

Effect of the Initial Acceleration Upon the Wave Resistance of Ship Models

Descriptive Note:

Technical Report

Corporate Author:

CALIFORNIA UNIV BERKELEY BERKELEY

Personal Author(s):

• Wehauden,John V.

Report Date:

1961-11-01

Pagination or Media Count:

50.0

Abstract:

An expression for the wave resistance of a thin ship in non-uniform motion as previously derived is presented, Trudy Tsentral Aero-Gidrodinam Instit, vyp. 348, 1939. We shall assume a continuous rise from an initial velocity 0 at t0 to a final velocity CO at ttsubO. We obtain an asymptotic expression for large t. Such results are, however, of practical interest, for it is precisely the behavior for larger values of t which is of interest in tank experiments. However, to complete the asymptotic results somewhat, the series expansion for small t is also included. The region, of indeterminate extent, lying between the regions where these two series expansions are sufficiently accurate must be investigated numerically. The present investigation has an advantage over a purely numerical one in that much general information can be found without a special choice of ship form. Furthermore, it provides valuable qualitative information which would facilitate more extensive numerical calculations.

Descriptors:

• SHIP MODELS
• WAVES
• MATHEMATICAL ANALYSIS
• ELECTRICAL RESISTANCE
• SERIES(MATHEMATICS)
• VELOCITY
• WATER TANKS

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE