Accession Number : AD0283281

Title :   BENDING AND TORSIONAL STRESSES IN PROPELLER SHAFT OF USS OBSERVATION ISLAND (EAG 154) IN SMOOTH AND ROUGH SEA

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON D C

Personal Author(s) : PRICE,RICHARD L. ; NOONAN,EDWARD F. ; FELDMAN,SAMUEL

Report Date : JUN 1962

Pagination or Media Count : 43

Abstract : Past studies of propeller shaft failures have indicated that the alternating bending stress was much higher in service than expected and have led to suggestions for improved shaft design procedures. During 1960, tests were conducted under various sea conditions up to a State 4 sea to check the adequacy of the existing propeller shaft of the US OHER VESSELS. It is concluded that the present size of the shaft of OBSERVATION ISLAND is satisfactory for normal operating conditions and that this is so largely because of the 5% increase in diam size introduced for operating in ice. The report includes a harmonic analysis of bending stresses, a comparison of measured values with theoretiservation island 9eag 154). The bending and torsional stresses obtained are evaluated, and bending stresses are compared with results obtained on other vessels. It is concluded that the present size of the shaft of OBSERVATION ISLAND is satisfactory for normal operating conditions and that this is so largely because of the 5% increase in diam size introduced for operating in ice. The report includes a harmonic analysis of bending stresses, a comparison of measured values with theoretical bending stresses computed from wake survey data, and suggestions for future work. (Author)

Descriptors :   *PROPELLERS (MARINE), FAILURE (MECHANICS), HARMONIC ANALYSIS, RELIABILITY, SHAFTS(MACHINE ELEMENTS), SHIPS, STRESSES, TESTS, TORQUE

Distribution Statement : APPROVED FOR PUBLIC RELEASE