Accession Number : AD0281754

Title :   AN ANALYSIS OF BOW VIBRATION INDUCED BY ANTI-PITCHING FINS,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Pearlman ,Michael D. ; Lou ,Young K. ; Wang,Shen

Report Date : MAY 1962

Pagination or Media Count : 35

Abstract : A study was made of the exciting force, the pick-up mechanism, and the elimination of resultant system vibrations associated with the operation of anti-pitching fins on ships. The anti-pitching fin, when moving down during a pitching cycle, causes a ventilated bubble to be formed on its upper surface. It is the subsequent collapse of this bubble which gives rise to a sudden pressure impulse and is the exciting force. The pickup mechanism is the model's hull.

Descriptors :   *FINS, *HYDRODYNAMICS, *SHIP HULLS, CAVITATION, MODEL TESTS, PITCH (MATERIAL), PITCH (MOTION), SHIP MODELS, TESTS, VIBRATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE