ISSN:
0894-9166
Keywords:
natural vibration analysis
;
modal analysis
;
modal identification
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract In this paper, it is pointed out that when several natural frequencies of a structure are clustered in a narrow band the individual modal shapes are very hard to measure or calculate with acceptable accuracy, whereas the invariant subspace spanned by them can be easily determined. It is recommanded that the sine of the included angle of two subspaces of equal dimensions may be used as an index for measuring the difference of the subspaces. A simple method is proposed for calculating the cosine of the included angle.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02209127
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