Space-Harmonic Analysis of Input Power Flow in a Periodically Stiffened Shell Filled With Fluid

Xu, Ming; Zhang, X.M.; Zhang, W.H.

doi:10.1006/jsvi.1998.2119

Cited by 23 publications

(6 citation statements)

References 7 publications

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“…The results of a shell with #uid were compared with those of shell in vacuum to evaluate the e!ect of the #uid. This research was extended to sti!ened shells "lled with #uid by Xu et al [15].…”

Section: Introductionmentioning

confidence: 98%

Vibration Analysis of Thin Cylindrical Shells Using Wave Propagation Approach

Zhang¹,

Liu²,

Lam³

2001

Journal of Sound and Vibration

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196

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Section: Introductionmentioning

confidence: 98%

Vibration Analysis of Thin Cylindrical Shells Using Wave Propagation Approach

Zhang¹,

Liu²,

Lam³

2001

Journal of Sound and Vibration

Self Cite

196

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“…The reactive forces induced by the stringers were expressed in terms of the displacement of the cylinder. Xu et al [8,9] investigated the input power flow from a cosine harmonic circumferential line force into an infinite cylindrical fluid-filled shell with periodic stiffeners. Yan et al [10] studied the vibrational power flow propagation of circumferential modes in the infinite periodic ring-stiffened cylindrical shells immersed in water.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Radiation From Thick Laminated Cylindrical Shells With Sparse Cross Stiffeners

Xu¹,

Ma²,

2013

Journal of Vibration and Acoustics

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A general method for predicting acoustic radiation from multiple periodic structures is presented and a numerical solution is proposed to find the radial displacement of thick laminated cylindrical shells with sparse cross stiffeners in the wavenumber domain. Although this method aims at the sound radiation from a single stiffened cylindrical shell, it can be easily adapted to analyze the vibrational and sound characteristics of two concentric cylindrical shells or two parallel plates with complicated periodic stiffeners, such as submarine and ship hulls. The sparse cross stiffeners are composed of two sets of parallel rings and one set of longitudinal stringers. The acoustic power of large cylindrical shells above the ring frequency is derived in the wavenumber domain on the basis of the fact that sound power is focused on the acoustic ellipse. It transpires that a great many band gaps of wave propagation in the helical wave spectra of the radial displacement for stiffened cylindrical shells are generated by the rings and stringers. The acoustic power and input power of stiffened antisymmetric laminated cylindrical shells are computed and compared. The acoustic energy conversion efficiency of the cylindrical shells is less than 10%. The axial and circumferential point forces can also produce distinct acoustic power. The radial displacement patterns of the antisymmetric cylindrical shell with fluid loadings are illustrated in the space domain. This study would help to better understand the main mechanism of acoustic radiation from stiffened laminated composite shells,

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“…Xu [35] revealed the relationship between three methods (wave propagation approach, theorem of residues, and numerical integral method) to analyze the forced vibration of an infinite elastic circular cylindrical shell filled with fluid. Xu and co-workers also studied the vibrational power flow in such a system [36][37]. Ma et al [38] coupled an annular plate to the end of a cylindrical shell and carried out an analysis of such coupled structure by a modified Fourier-Ritz method.…”

Section: Introductionmentioning

confidence: 99%