STATIONARY NATURAL FREQUENCIES AND MODE SHAPES OF COMPOSITE LAMINATES

Authors
Citation
Xz. Zhang et N. Hasebe, STATIONARY NATURAL FREQUENCIES AND MODE SHAPES OF COMPOSITE LAMINATES, AIAA journal, 32(10), 1994, pp. 2061-2066
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Aerospace Engineering & Tecnology
Journal title
AIAA journal → ACNP
ISSN journal
0001-1452
Volume
32
Issue
10
Year of publication
1994
Pages
2061 - 2066
Database
ISI
SICI code
0001-1452(1994)32:10<2061:SNFAMS>2.0.ZU;2-Z
Abstract
The natural vibration of composite laminates is studied in this articl e. It is found that for a composite laminate of constant thickness the natural frequency approaches monotonically to a stationary value, and the natural vibration mode a stationary shape, as the number of its c onstitutent plies increases. The stationary value and the stationary s hape can easily be determined by utilizing the effective modulus and t he effective density of the composite laminate, for which exact expres sions are derived. The effective modulus in natural vibrations equals that in static problems in all cases, whereas the effective density, d epending on frequency and other parameters in general, coincides with the mean density of the constituent plies only in simple vibration mod es.