Vibration and enhanced stability properties of fluid-conveying pipes with two symmetric elbows fitted at downstream end

Wang, L.; Dai, Huliang

doi:10.1007/s00419-011-0545-9

Cited by 27 publications

(11 citation statements)

References 31 publications

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“…By considering a Winkler-type elastic foundation, Marzani et al 13 revealed that the elastic foundation can result in an increase of critical°ow speed with increasing sti®ness of the Winkler coe±cient. Recently, the vibration and stability properties of°uid-conveying cantilevers with two symmetric elbows were studied by Wang and Dai,14 who found that the vibration frequency of the system can be comfortably controlled due to the selectable angle of inclination of downstream elbows. Firouz-Abadia et al 15 further investigated the stability of a horizontal cantilevered pipe with an inclined terminal nozzle by considering the coupled bend-torsional vibrations.…”

Section: Introductionmentioning

confidence: 99%

Dynamics and Stability of Magnetically Actuated Pipes Conveying Fluid

Dai

Wang

2016

Int. J. Str. Stab. Dyn.

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This paper is concerned with the development of a theoretical model for predicting the dynamics and pull-in instability of magnetically actuated pipes conveying°uid. The equation of motion of the pipe is constructed in the presence of nonlinear magnetic forces. The lateral displacement of the pipe comprises two parts, namely, a static displacement and a perturbation displacement about the static. Based on the¯nite element method (FEM), the static de°ection of the pipe is calculated numerically¯rst. The computed static de°ection is then used to solve the equation governing the perturbed displacement. Consequently, the pull-in and°ow-induced instabilities can be determined for clamped-clamped or cantilevered boundary conditions. Results show that the°ow speed can signi¯cantly a®ects the static de°ection of the pipe and hence the pull-in magnetic force. The magnetic force, on the other hand, has a great impact on the dynamics of the pipe system.

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Section: Introductionmentioning

confidence: 99%

Dynamics and Stability of Magnetically Actuated Pipes Conveying Fluid

Dai

Wang

2016

Int. J. Str. Stab. Dyn.

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“…As the main structure for oil and gas transportation, fluid-conveying pipes are widely used in aerospace engineering, marine engineering, water conservancy systems, oil and gas transportation systems, and the petroleum energy/chemical/nuclear industries [1][2][3][4][5]. The structure of pipes employed in engineering nuclear power plants are inevitably impacted by nuclear and fuel explosions [6].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Transient Dynamics of Graphene Nanoplatelets Reinforced Pipes Conveying Fluid under Blast Loads and Thermal Environment

Liu

Wang

et al. 2022

Mathematics

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This work aims at investigating the nonlinear transient response of fluid-conveying pipes made of graphene nanoplatelet (GPL)-reinforced composite (GPLRC) under blast loads and in a thermal environment. A modified Halpin–Tsai model is used to approximate the effective Young’s modulus of the GPLRC pipes conveying fluid; the mass density and Poisson’s ratio are determined by using the Voigt model. A slender Euler–Bernoulli beam is considered for modeling the pipes conveying fluid. The vibration control equation of the GPLRC pipes conveying fluid under blast loads is obtained by using Hamilton’s principle. A set of second-order ordinary differential equations are obtained by using the second-order Galerkin discrete method and are solved by using the adaptive Runge–Kutta method. Numerical experiments show that GPL distribution and temperature; GPL weight fraction; pipe length-to-thickness ratio; flow velocity; and blast load parameters have important effects on the nonlinear transient response of the GPLRC pipes conveying fluid. The numerical results also show that due to the fluid–structure interaction, the vibration amplitudes of the GPLRC pipes conveying fluid decay after the impact of blast loads.

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“…Since active control methods for cantilevered pipes conveying fluid are always restricted by the reliability and service life of the controller, passive control methods [18][19][20][21][22] have attracted more attentions. For instance, Wang et al [23] derived the governing equations of a pipe conveying fluid on elastic foundation and showed that an elastic foundation can increase the critical flow velocity for statical and dynamical instabilities of the pipe.…”

Section: Introductionmentioning

confidence: 99%

Dynamical Stability of Cantilevered Pipe Conveying Fluid with Inerter-Based Dynamic Vibration Absorber

Liu¹,

Tan²,

Liu³

et al. 2020

Computer Modeling in Engineering &Amp; Sciences

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Cantilevered pipe conveying fluid may become unstable and flutter instability would occur when the velocity of the fluid flow in the pipe exceeds a critical value. In the present study, the theoretical model of a cantilevered fluid-conveying pipe attached by an inerter-based dynamic vibration absorber (IDVA) is proposed and the stability of this dynamical system is explored. Based on linear governing equations of the pipe and the IDVA, the effects of damping coefficient, weight, inerter, location and spring stiffness of the IDVA on the critical flow velocities of the pipe system is examined. It is shown that the stability of the pipe may be significantly affected by the IDVA. In many cases, the stability of the cantilevered pipe can be enhanced by designing the parameter values of the IDVA. By solving nonlinear governing equations of the dynamical system, the nonlinear oscillations of the pipe with IDVA for sufficiently high flow velocity beyond the critical value are determined, showing that the oscillation amplitudes of the pipe can also be suppressed to some extent with a suitable design of the IDVA.

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Vibration and enhanced stability properties of fluid-conveying pipes with two symmetric elbows fitted at downstream end

Cited by 27 publications

References 31 publications

Dynamics and Stability of Magnetically Actuated Pipes Conveying Fluid

Dynamics and Stability of Magnetically Actuated Pipes Conveying Fluid

Nonlinear Transient Dynamics of Graphene Nanoplatelets Reinforced Pipes Conveying Fluid under Blast Loads and Thermal Environment

Dynamical Stability of Cantilevered Pipe Conveying Fluid with Inerter-Based Dynamic Vibration Absorber

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