Fluid-induced vibration of composite natural gas pipelines

Zou, Guang Ping; Cheraghi, N.; Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬, Farid

doi:10.1016/j.ijsolstr.2004.07.001

Cited by 48 publications

(22 citation statements)

References 24 publications

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“…The flow of gas through a pipeline is modelled by the isothermal Euler equations with friction. In the operation of gas pipelines, it is essential that the velocities remain below critical values where vibrations occur and noise is created, see [36]. We study a quasilinear wave equation for the gas velocity in the case of ideal gas which is derived from the isothermal Euler equations with friction.…”

Section: Introductionmentioning

confidence: 99%

Neumann boundary feedback stabilization for a nonlinear wave equation: A strict $H^2$-lyapunov function

Gugat¹,

Leugering²,

Wang³

2017

Mathematical Control &Amp; Related Fields

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For a system that is governed by the isothermal Euler equations with friction for ideal gas, the corresponding field of characteristic curves is determined by the velocity of the flow. This velocity is determined by a second-order quasilinear hyperbolic equation. For the corresponding initial-boundary value problem with Neumann-boundary feedback, we consider non-stationary solutions locally around a stationary state on a finite time interval and discuss the well-posedness of this kind of problem. We introduce a strict H 2 -Lyapunov function and show that the boundary feedback constant can be chosen such that the H 2 -Lyapunov function and hence also the H 2 -norm of the difference between the non-stationary and the stationary state decays exponentially with time.

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Section: Introductionmentioning

confidence: 99%

Neumann boundary feedback stabilization for a nonlinear wave equation: A strict $H^2$-lyapunov function

Gugat¹,

Leugering²,

Wang³

2017

Mathematical Control &Amp; Related Fields

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“…Zou et al developed a state-variable model of reinforced composite natural gas filled pipelines for the analysis of flow induced vibration. The results of the analytical model were then validated by common Finite Element Analysis (FEA) [6]. Dai et al used transfer matrix method which includes the steady combined force to formulate three-dimensional and curved pipelines conveying fluid.…”

Section: Introductionmentioning

confidence: 99%

Non-destructive testing and assessment of a piping system with excessive vibration and recurrence crack issue: An industrial case study

Ong

Eng²,

Noroozi

2017

Engineering Failure Analysis

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Flow in piping generates random excitation which is non-periodic and that means resonance will not be the key factor to pipe failure. One of the main causes of pipe failure is weak supports. Due to their dissimilar stiffness in the piping system, it leads to low frequency and high amplitude flow induced vibration that causes high cyclic stress resulting in high cycle fatigue failure of the joints. Other contributing factors in pipe failure are poor or inadequate design, poor workmanship during installations or maintenance and inadequate or weak and flexible support. These pipes are usually required to work non-stop for 24 hours a day 7 days a week for weeks, months or years at a time. Regular monitoring and in-service dynamic analysis should ensure continuous and safe operation. This paper presents a case study on monitoring, diagnosis, and maintenance of a piping system. High vibration was observed during routine maintenance, in a 30 m high, 24 inch diameter amine pipes at an oil and gas processing plant in southern Thailand. Amine liquid leakage due to high cycle fatigue crack was reported at the piping bearing and this remained a major concern for the personnel at the plant. A non-destructive testing approach which relies on a combined experimental techniques (i.e. Operating Deflection Shapes (ODS)) and computational mechanics (i.e. Finite Element (FE) modal analysis, Computational Fluid Dynamics (CFD) Analysis, Fluid-Structure Interaction (FSI) Analysis) was used to assess the structural integrity of the piping and in the effort of proposing a suitable recommendation in rectifying the high vibration issue. The analyses concluded that the root cause of high vibration was due to inadequate and weak piping support. As a result, additional supports were proposed to counter the deflection of the piping generated by the flow. The supports were found effective in reducing vibration in which the stress concentration at the new supports and the piping was considered relatively low.

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“…It has been proved that the fluid-structure interaction phenomenon induces a significant response of the structure [11] and alters the fluid force acting on the walls. The fluid-induced vibration of simply supported and clamped pipelines was studied in [12], where parameters such as liquid mass density to pipe-wall mass density ratio, pipe radius to pipe-wall thickness ratio, fluid velocity and fluid pressure are considered. A vibration analysis of a 3-dimensional piping system composed of curved and straight sections is performed in [13] using the wave approach while the obtained results are compared with the ones obtained from a FEM formulation.…”

Section: Introductionmentioning

confidence: 99%

Non-destructive testing and assessment of dynamic incompatibility between third-party piping and drain valve systems: an industrial case study

Kong

Noroozi

Rahman

et al. 2014

Nondestructive Testing and Evaluation

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This paper presents the outcome of an industrial case study that involved condition monitoring of piping system that showed signs of excess fatigue due to flow induced vibration. Due to operational requirements a novel non-destructive assessment stratagem was adopted using different vibration analysis techniquessuch as Experimental Modal Analysis (EMA) and Operating Deflection Shapes (ODS) -and complemented by visual inspection. Modal analysis performed near a drain valve showed a dynamic weakness problem (several high frequency flow induced vibration frequency peaks) hence Condition Based Monitoring (CBM) was used.This could easily be linked to design problem associated with the dynamic incompatibility due to dissimilar stiffness between two 3 rd party supplied pipe and valve systems. It was concluded that this is the main cause for these problem types especially when systems are supplied by third parties, but assembled locally, a major cause of dynamic incompatibility. It is the local assembler's responsibility to develop skills and expertise needed to sustain the operation of these plants. This paper shows the technique used as result of one such initiative. Since high amplitude, low frequency displacement can cause low cycle fatigue, attention must be paid to ensure flow remains as steady-state as possible. The ability to assess the level of design incompatibility and the level of modification required using non-destructive testing is vital if these systems are to work continuously.

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Fluid-induced vibration of composite natural gas pipelines

Cited by 48 publications

References 24 publications

Neumann boundary feedback stabilization for a nonlinear wave equation: A strict $H^2$-lyapunov function

Neumann boundary feedback stabilization for a nonlinear wave equation: A strict $H^2$-lyapunov function

Non-destructive testing and assessment of a piping system with excessive vibration and recurrence crack issue: An industrial case study

Non-destructive testing and assessment of dynamic incompatibility between third-party piping and drain valve systems: an industrial case study

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