Vibrational Power Flow Input and Transmission in a Circular Cylindrical Shell Filled With Fluid

Xu, Ming; Zhang, W.H.

doi:10.1006/jsvi.1999.2880

Cited by 31 publications

(11 citation statements)

References 13 publications

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“…The point O is located both on the free surface Oy and rigid wall surface Ox. Thus, if the acoustic radiation function satisfies equations (10) and (11) in point O(x ¼ 0, y ¼ 0), then the acoustic boundary condition of equation 12is also satisfied. The orthogonal transformation of equations (10) and 11 14, respectively, is obtained as P T n;f H ð1Þ n ðk r sÞ þ P 1 Ànf H ð1Þ Àn ðk r sÞe Àinp ¼ 0 (13-1)…”

Section: Orthogonalization Transformationmentioning

confidence: 99%

“…For the submerged cylindrical shells, the wave propagation approach was often used to study the vibro-acoustic problem. Xu and Zhang 11 discussed the vibration power flow in an infinite elastic cylindrical shell filled with a fluid in which the input power flow and the power flow transmission characteristics depend on the free propagating wave propagation approach. Yan et al.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the input power flow characteristics of cylindrical shells with combination boundaries

Chen

Liu

2018

Journal of Low Frequency Noise, Vibration and Active Control

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In this study, the input power flow problem of the cylindrical shell with complex acoustic boundaries was investigated. According to the acoustic characteristic of control domain which combination free interface and rigid wall interface at the same time for the cylindrical shell, the double reflection method and mirror image method were applied, and the analytical function of the input power flow for the cylindrical shell was derived. Finally, a cylindrical shell in the quarterinfinite acoustic space for example, the numerical calculation of input power flow of cylindrical shell was carried out. The influences of acoustic boundary characteristics, location, and frequency on the input power flow were compared. In addition, the effectiveness and convergence of the proposed method was verified using finite element method.

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Section: Orthogonalization Transformationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the input power flow characteristics of cylindrical shells with combination boundaries

Chen

Liu

2018

Journal of Low Frequency Noise, Vibration and Active Control

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“…Fuller et al [9] have investigated thin-walled motion of axisymmetric and nonaxisymmetric vibration in terms of Donnel-Mushtari shell equations, where dispersion curves, energy distribution, input mobility, and internal flow's effect have been discussed. The forced vibration in thin pipe has been studied furthermore by Xu and Zhang [10]. Such investigations should be applicable not only for the NDE of pipes but also for the ultrasonic flowmeters.…”

Section: Introductionmentioning

confidence: 98%

Theoretical Investigation of Propagation of Longitudinal Guided Waves in Cylindrical Pipe Filled with Quiescent or Flowing Fluid: A Foundational Experimental Investigation

Liu

et al. 2010

2010 First International Conference on Sensor Device Technologies and Applications

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Longitudinal ultrasonic guided waves propagation in fluid-filled cylindrical steel pipe is investigated numerically and experimentally. By using displacement and stress boundary conditions, dispersion equation for longitudinal guided waves in fluid-filled steel pipe with quiescent or flowing fluid is derived and numerical analyzed. According to numerical results, it is shown that optimized guided waves have potentials to measure flow rate of fluid filled in narrow cylindrical pipes. In experiments, the 4 PZT wafers adhered to one end of the outer surface of a steel pipe filled with and without water are used as the actuators and receivers simultaneously. According to received signals, experimental propagation velocities of longitudinal guided wave modes are obtained. Experimental results show a good agreement with theoretical predication. Foundational experimental results show that longitudinal ultrasonic guided waves can be used for flow rate measurement of fluid in narrow pipes.

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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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Vibrational Power Flow Input and Transmission in a Circular Cylindrical Shell Filled With Fluid

Cited by 31 publications

References 13 publications

Analysis of the input power flow characteristics of cylindrical shells with combination boundaries

Analysis of the input power flow characteristics of cylindrical shells with combination boundaries

Theoretical Investigation of Propagation of Longitudinal Guided Waves in Cylindrical Pipe Filled with Quiescent or Flowing Fluid: A Foundational Experimental Investigation

Acoustic Radiation From Thick Laminated Cylindrical Shells With Sparse Cross Stiffeners

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