Accession Number:

AD0606195

Title:

EXTREME VALUE ANALYSIS OF SHIP VIBRATION,

Descriptive Note:

Corporate Author:

DAVID TAYLOR MODEL BASIN WASHINGTON D C

Personal Author(s):

Report Date:

1964-08-01

Pagination or Media Count:

55.0

Abstract:

This report presents a statistical method for establishing tolerance limits vibration levels for ship vibration. The method is distribution free. That is, the distribution is not required. The only requirements are, random data and a continuous frequency function. Theory is presented which establishes a distribution function that gives the probability that a proportion, such as 95 percent or more, of the population will be included between the extreme values of the sample. The theory is used in this analysis to determine limits for samples of longitudinal vibration recorded at the stern of a submarine for conditions existing during straight-course, steady-speed runs. The runs were made at different shaft rpm, and one sample was taken of the vibration during each run. The samples were assumed to have come from different populations. Probability limits are plotted for the 95-percent fraction of each population represented by the samples. These limits are compared with corresponding limits established by normal theory. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE