Multi-harmonic resonance of pipes conveying fluid with pulsating flow

Hao, Meng-Yuan; Ding, Hu; Mao, Xiao-Ye; Chen, Liqun

doi:10.1016/j.jsv.2023.117990

Journal of Sound and Vibration

2024

DOI: 10.1016/j.jsv.2023.117990

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Multi-harmonic resonance of pipes conveying fluid with pulsating flow

Meng-Yuan Hao

Hu Ding

Xiao-Ye Mao

et al.

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2024

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Cited by 23 publications

References 35 publications

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Evaluation of operational parameters for vessel's flexible subsea pipelines

Malakhov,

Kiris,

Bondarenko

et al. 2024

Engineering Reports

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The operation of offshore vessels is directly related to the use of flexible pipelines. The article describes in detail the analysis of power, geometric, kinematic and technological parameters that affect the main operational characteristics of these pipes during their operation under water, in rough sea conditions and under wind loads. The article describes the degree of dependence between loads on the pipeline and velocity of the oncoming flow, the geometry of the pipe and the distance to the rigid surface of the ship's hull or the seabed. It was determined how the flow velocity during parametric oscillations of the pipeline in unrestricted flow and near the surface of the seabed affects the change in its drag and lift coefficients. An estimate of operational limits of flexible pipeline instability was obtained. On the base of changes in distributed load, specific values for safe lengths of pipelines were formulated. It has been stated that the probability of failure‐free operation of a flexible pipeline at a level of 0.99 is directly determined by the frequency of its oscillation. Its numerical values should always be at a level that does not exceed 3.7% of the frequency of pipe dynamic oscillations.

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Evaluation of operational parameters for vessel's flexible subsea pipelines

Malakhov,

Kiris,

Bondarenko

et al. 2024

Engineering Reports

View full text Add to dashboard Cite

show abstract

Theoretical and experimental study of a bi-stable piezoelectric energy harvester under hybrid galloping and band-limited random excitations

Li,

Zheng,

Qin

et al. 2024

Appl. Math. Mech.-Engl. Ed.

Self Cite

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In the practical environment, it is very common for the simultaneous occurrence of base excitation and crosswind. Scavenging the combined energy of vibration and wind with a single energy harvesting structure is fascinating. For this purpose, the effects of the wind speed and random excitation level are investigated with the stochastic averaging method (SAM) based on the energy envelope. The results of the analytical prediction are verified with the Monte-Carlo method (MCM). The numerical simulation shows that the introduction of wind can reduce the critical excitation level for triggering an inter-well jump and make a bi-stable energy harvester (BEH) realize the performance enhancement for a weak base excitation. However, as the strength of the wind increases to a particular level, the influence of the random base excitation on the dynamic responses is weakened, and the system exhibits a periodic galloping response. A comparison between a BEH and a linear energy harvester (LEH) indicates that the BEH demonstrates inferior performance for high-speed wind. Relevant experiments are conducted to investigate the validity of the theoretical prediction and numerical simulation. The experimental findings also show that strong random excitation is favorable for the BEH in the range of low wind speeds. However, as the speed of the incoming wind is up to a particular level, the disadvantage of the BEH becomes clear and evident.

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A magnetic nonlinear energy sink with quasi-zero stiffness characteristics

Liu,

Ding,

Geng

et al. 2024

Nonlinear Dyn

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Multi-harmonic resonance of pipes conveying fluid with pulsating flow

Cited by 23 publications

References 35 publications

Evaluation of operational parameters for vessel's flexible subsea pipelines

Evaluation of operational parameters for vessel's flexible subsea pipelines

Theoretical and experimental study of a bi-stable piezoelectric energy harvester under hybrid galloping and band-limited random excitations

A magnetic nonlinear energy sink with quasi-zero stiffness characteristics

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