Statistical Analysis of the Modal Properties of Large Structural Systems J. H. Wiggins Company

Format:

Conference/Event

Author/Creator:

Collins, J. D. (Jon D.), author.

Conference Name:

National Aeronautical and Space Engineering and Manufacturing Meeting (1971-09-28 : Los Angeles, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1971

Summary:

A theory is developed to predict eigenvalue and eigenvector uncertainty in large dynamic models. The uncertainty is based on physical property uncertainty and should not be confused with numerical roundoff, although the method can be extended to include the latter. The theory, when implemented on a computer, is used to analyze the uncertainties in frequencies and mode shapes based on uncertainties in mass, stiffness, modulus of elasticity, et ceteraThe method incorporates a linear statistical model which is quite adequate for handling property uncertainties of 10% or more. The model is not limited to small systems but uses certain statistical assumptions as well as selective matrix manipulations to keep the size of all matrix operations to within the number of degrees of freedom of the system.Examples are given for two longitudinal vibration problems, and the results are supported by a Monte Carlo analysis

Notes:

Vendor supplied data

Publisher Number:

710785

Access Restriction:

Restricted for use by site license