A solution procedure for thin-walled laminated composite beams is presented. Two configurations are considered, producing extension-twist and bending-twist coupling, respectively. The influence of coupling on the characteristic equations for free vibration is isolated. It is shown that the characteristic determinant for extension-twist coupling can be expressed as the product of the two decoupled ones. For the case of bending-twist coupling, a simple-quasi-decoupled procedure is developed. This model is shown to provide accurate predictions for natural frequencies of practical interest for slender, laminated composite box beams. (C) 1998 Elsevier Science Ltd. All rights reserved. [References: 3]
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