Impact vibration properties of locally resonant fluid-conveying pipes*

Hu, Bing; Zhu, Fulei; Yu, Dianlong; Liu, Jiangwei; Zhang, Zhenfang; Zhong, Jie; Wen, Jihong

doi:10.1088/1674-1056/abb312

Cited by 23 publications

(4 citation statements)

References 50 publications

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“…The vibration of the pipeline is efficiently decreased by increasing pipe diameter and raising restrictions. In addition, many researchers examined the vibration attenuation effect of periodically distributed local shock absorbers on the vibration of pipelines under specific frequency bandwidths (El-Borgi et al , 2021; Hu et al , 2020; Chen et al , 2021a). Based on the aforementioned research, the dynamic characteristics of the pipeline and the relationship between the flow pattern, vibration and fluctuating pressure in the pipeline can be understood.…”

Section: Introductionmentioning

confidence: 99%

Research on vibration characteristics of rocket engine flow pipeline

Yong,

Wu-Qi

2024

AEAT

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Purpose Abnormal vibrations often occur in the liquid oxygen kerosene transmission pipelines of rocket engines, which seriously threaten their safety. Improper handling can result in failed rocket launches and significant economic losses. Therefore, this paper aims to examine vibrations in transmission pipelines. Design/methodology/approach In this study, a three-dimensional high-pressure pipeline model composed of corrugated pipes, multi-section bent pipes, and other auxiliary structures was established. The fluid–solid coupling method was used to analyse vibration characteristics of the pipeline under various external excitations. The simulation results were visualised using MATLAB, and their validity was verified via a thermal test. Findings In this study, the vibration mechanism of a complex high-pressure pipeline was examined via a visualisation method. The results showed that the low-frequency vibration of the pipe was caused by fluid self-excited pressure pulsation, whereas the vibration of the engine system caused a high-frequency vibration of the pipeline. The excitation of external pressure pulses did not significantly affect the vibrations of the pipelines. The visualisation results indicated that the severe vibration position of the pipeline thermal test is mainly concentrated between the inlet and outlet and between the two bellows. Practical implications The results of this study aid in understanding the causes of abnormal vibrations in rocket engine pipelines. Originality/value The causes of different vibration frequencies in the complex pipelines of rocket engines and the propagation characteristics of external vibration excitation were obtained.

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Section: Introductionmentioning

confidence: 99%

Research on vibration characteristics of rocket engine flow pipeline

Yong,

Wu-Qi

2024

AEAT

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“…Shen et al [27] and Shen et al [28] put the research emphasis on the stability and sound and vibration control of periodic shells conveying fluid, and proposed functionally-graded-material periodic shell models to eliminate or alleviate the stress concentration induced by the material or geometrical discontinuity of periodic composite structures [29]. Recently, Hu et al [30] examined the vibration attenuation properties of a LR pipe under impact excitation, and further designed a new AM pipe presenting the LR and Bragg scattering BGs simultaneously, which improved the broadband vibration BGs [31]. The present author also investigated the vibration suppression performance of a fluid-conveying PC pipe with axially deploying motion [32].…”

Section: Introductionmentioning

confidence: 99%

Phononic Band Gap and Free Vibration Analysis of Fluid-Conveying Pipes with Periodically Varying Cross-Section

Liang

Qian

et al. 2021

Applied Sciences

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Phononic crystals (PCs) are a novel class of artificial periodic structure, and their band gap (BG) attributes provide a new technical approach for vibration reduction in piping systems. In this paper, the vibration suppression performance and natural properties of fluid-conveying pipes with periodically varying cross-section are investigated. The flexural wave equation of substructure pipes is established based on the classical beam model and traveling wave property. The spectral element method (SEM) is developed for semi-analytical solutions, the accuracy of which is confirmed by comparison with the available literature and the widely used transfer matrix method (TMM). The BG distribution and frequency response of the periodic pipe are attained, and the natural frequencies and mode shapes are also obtained. The effects of some critical parameters are discussed. It is revealed that the BG of the present pipe system is fundamentally induced by the geometrical difference of the substructure cross-section, and it is also related to the substructure length and fluid–structure interaction (FSI). The number of cells does not contribute to the BG region, while it has significant effects on the amplitude attenuation, higher order natural frequencies and mode shapes. The impact of FSI is more evident for the pipes with smaller numbers of cells. Moreover, compared with the conventional TMM, the present SEM is demonstrated more effective for comprehensive analysis of BG characteristics and free vibration of PC dynamical structures.

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“…Most of the previous studies relevant to LR periodic structures are mainly focused on single-degree-of-freedom (SDoF) resonator. Recently, vibration band gaps in metamaterial pipes, 16–18 beams, 19–21 shafts 22,23 and plates 24 were studied using SDoF resonator. Chen and Wu 25 designed a periodic truss beam with and without resonators and achieved low and high frequency band gaps.…”

Section: Introductionmentioning

confidence: 99%

Lateral flexural vibration reduction in a periodic piping system enhanced with two-degrees-of-freedom resonators

Iqbal

Kumar

Bursi

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Pipe systems are commonly used in the process and power industries to transport fluid from one terminal to others. Propagation behaviour of lateral flexural waves in a pipe coupled with periodic rack structure is investigated. The pipe-rack system considered in this study is a practical case and is realized as a pipe on periodic elastic supports, while a pipe on simple and without supports represents special cases when the rack stiffness leads to extreme values. The propagation constant relations in terms of frequency are derived using Bloch–Floquet theorem which are successively verified with finite element models. The results show that a pipe with rack creates a narrow locally resonant band gap in low-frequency range which is caused by the first natural mode of the rack. Conversely, a pipe on simple supports entails only Bragg-type band gaps, while a pipe without supports carries no band gap. For tuning the band gap properties, a two-degrees-of-freedom lateral localized resonator is attached to the centre of each unit cell of the pipe. It is found that certain frequency ranges in the targeted pass bands are effectively controlled by the resonator. Furthermore, the effect of various resonator parameters, i.e. mass ratio, stiffness and damping, on band gaps is examined. It is observed that the band gaps are vanished when damping is introduced in the system. The results show a promising way to flexural vibration control of a periodic piping system with various boundary conditions.

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Impact vibration properties of locally resonant fluid-conveying pipes*

Cited by 23 publications

References 50 publications

Research on vibration characteristics of rocket engine flow pipeline

Research on vibration characteristics of rocket engine flow pipeline

Phononic Band Gap and Free Vibration Analysis of Fluid-Conveying Pipes with Periodically Varying Cross-Section

Lateral flexural vibration reduction in a periodic piping system enhanced with two-degrees-of-freedom resonators

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