Study on Vibrational Power Flow Propagation Characteristics in a Laminated Composite Cylindrical Shell Filled with Fluid

Abstract

The characteristics of vibrational power flow in an infinite laminated composite cylindrical shell filled with fluid excited by a circumferential line cosine harmonic force are investigated using wave propagation approach. The harmonic motions of the shell and the fluid filled in the shell are described by Love shell theory and acoustic wave equation, respectively. Under the driving force, the vibrational power flow input into the coupled system and the transmission of the power flow carried by different internal forces (moments) of the shell in the axial direction are established. Numerical computations are implemented to investigate the vibrational power flow input and its propagation. It is found that characteristics of the vibrational power flow vary with different circumferential mode orders and frequencies, and the presence of fluid in the shell significantly affects the vibration of the shell structure. Additionally, parametric investigations are carried out to study the effects of the fiber orientation, modulus ratio 11 / 22 , and thickness-to-radius parameter ℎ/ on input power into the coupled system and propagation power along the shell axial direction. This work will provide some guidance for the vibration control of the laminated composite cylindrical shell.

Vibrational power flow analysis of cracked functionally graded beams

“…They found that the power flow of the sandwich beam reduces with the greater extent of attenuation of the flexural wave. Liu et al [10] studied propagation characteristics of the vibrational power flow in a laminated composite cylindrical shell filled with fluid. At present, the power flow analysis becomes an important tool for studying the structural noise [11], isolation system [12], power transmission [13], etc.…”

Vibrational power flow analysis of Timoshenko microbeams with a crack

“…However, to the best of authors' knowledge, no work had been reported on the vibration power flow analysis of micro-/nano-structures. Liu et al [7] studied the vibrational power flow in a cylindrical shell filled with fluid under a dynamic force loading. Cho et al [8] developed the structural intensity technique to analyze the vibrational energy flow in plates that are under a harmonic excitation.…”