Coupled damping vibrations of anisotropic box beams

This paper suggests a mathematical model for damping vibrations of an anisotropic thin-walled bars. It provides numerical study results regarding the effect of reinforcing fiber orientation upon natural frequencies and mechanical loss coefficients for coupled vibrations of symmetric and asymmetric box beams. The paper shows that vibrations of symmetric box beam are accompanied by a bending-twisting-longitudinal-shearing interaction, and vibrations of the asymmetric box beam are accompanied by longitudinal-twisting and bending-bending interactions.