Accession Number : AD0271617

Title :   INVESTIGATION OF THE APPLICABILITY AND LIMITATIONS OF THE VARIOUS METHODS OF COMPUTING AMPLITUDES OF TORSIONAL VIBRATION IN WHICH ENGINE DAMPING IS OF PRIMARY IMPORTANCE

Corporate Author : MANHATTAN COLL NEW YORK

Personal Author(s) : ONDRA,OTAKAR ; PAN,SAI-LUNG

Report Date : DEC 1961

Pagination or Media Count : 1

Abstract : The applicability and limitations of various methods are investigated for computing amplitudes of torsional vibration in which engine damping is of primary importance. The investigation is limited to the direct-connected enginegenerator type of internal-combustion installations. A generally poor correlation was found to exist between amplitudes of torsional vibration calculated by means of seventeen available formulae, and amplitudes determined by tests. Arbitrarily safer amplitude forecasts are possible if existing formulae are modified by introducing statistically determined coefficients. A new empirical formula, statistically evolved from test data, indicates a much improved reliability and accuracy of amplitude and maximum stress predictions. (Author)

Descriptors :   *SHAFTS(MACHINE ELEMENTS), *TORQUE, GENERATORS, INTERNAL COMBUSTION ENGINES, NUMERICAL METHODS AND PROCEDURES, VIBRATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE