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The pipeline flow coupled vibration traveling wave Method

Author: LinLei
Tutor: RenJianTing
School: Northwestern Polytechnical University
Course: Engineering Mechanics
Keywords: Pipeline Fluid-structure interaction Traveling wave method Frequency domain
CLC: TV134
Type: Master's thesis
Year: 2005
Downloads: 444
Quote: 5
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Abstract


Carrier pipeline fluid-structure interaction has extensive engineering background and important theoretical and academic value . Pipe system , consider the fluid-structure coupling , pipe vibration wave is a propagating wave thinking , traveling wave method to study the flow dynamics of straight and curved pipe piping systems . Uniform straight pipes , based on the classic pipeline fluid-structure coupled differential equations , the waveguide equations of fluid-structure interaction piping systems is derived by the the structure node boundary conditions at wave scattering model to establish a system of fluid-structure interaction . The numerical results with the existing results of the comparison show that the calculation results of the traveling wave method is correct , and the accuracy is much higher than the finite element method . Poisson's ratio and the boundary of the pipeline connection conditions and other factors discussed on the basis of the inherent characteristics of the pipeline , as well as liquid average velocity of the impact of the pipeline stability , and to explore the idea of using the support pipe vibration control . On the basis of a straight pipeline research , we propose two ways to study the dynamics of the curved pipe . One method is the use of curved pipe unit discretization and discrete short straight pipe to the introduction of the bending stiffness correction primers , while building the plane coordinate transformation matrix , in order to achieve a straight pipe - elbow traveling wave hybrid modeling . Another method is the traveling wave modeling curved pipe directly derived dynamic differential equations based on the structure of the bending beam , as well as the fluid vibration differential equations , fluid-structure interaction , bend waveguide equation . The second method is more simple , convenient , and greatly reduces the complexity of the problem of bending pipe vibration . Finally, in order to verify the feasibility of the traveling wave method described in this article , more than one cross straight pipeline of experimental research . Studies have shown that the numerical simulation of the traveling-wave results are in good agreement with the experimental results and the calculation accuracy superior to the finite element method , which prove that the traveling wave method to study the pipeline flow structure interaction problems , this establishment of the pipeline traveling wave model correctly sex .

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CLC: > Industrial Technology > Hydraulic Engineering > The basic science of water resources project > Hydraulics > Pipeline Flow Mechanics
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