Academic literature on the topic 'Resonant pipes'

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Journal articles on the topic "Resonant pipes"

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Mueller, Fred M., Dipen N. Sinha, Roger D. Hasse, and Kendall N. Springer. "Resonant ultrasound in circular pipes." Journal of the Acoustical Society of America 99, no. 4 (1996): 2594–603. http://dx.doi.org/10.1121/1.415276.

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Chang, C. O., and K. C. Chen. "Dynamics and Stability of Pipes Conveying Fluid." Journal of Pressure Vessel Technology 116, no. 1 (1994): 57–66. http://dx.doi.org/10.1115/1.2929559.

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This paper deals with the dynamics and stability of simply supported pipes conveying fluid, where the fluid has a small harmonic component of flow velocity superposed on a constant mean value. The perturbation techniques and the method of averaging are used to convert the nonautonomous system into an autonomous one and determine the stability boundaries. Post-bifurcation analysis is performed for the parametric points in the resonant regions where the axial force, which is induced by the transverse motion of the pipe due to the fixed-span ends and contributes nonlinearities to the equations of
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Hu, Bing, Fu-Lei Zhu, Dian-Long Yu, et al. "Impact vibration properties of locally resonant fluid-conveying pipes." Chinese Physics B 29, no. 12 (2020): 124301. http://dx.doi.org/10.1088/1674-1056/abb312.

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Dehrouyeh-Semnani, Amir Mehdi, Esmaeil Dehdashti, Mohammad Reza Hairi Yazdi, and Mansour Nikkhah-Bahrami. "Nonlinear thermo-resonant behavior of fluid-conveying FG pipes." International Journal of Engineering Science 144 (November 2019): 103141. http://dx.doi.org/10.1016/j.ijengsci.2019.103141.

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Valembois, J., and C. Birard. "RESONANT STRUCTURES AND THEIR APPLICATION TO HARBOR PROTECTION." Coastal Engineering Proceedings 1, no. 5 (2011): 41. http://dx.doi.org/10.9753/icce.v5.41.

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The principle of resonant structures is briefly described. These hydraulic resonators, which have been patented by Eleotricite de France, act as reflective structures for a range of wave periods encompassing their period of resonance, without obstructing the passages like a jetty. The originality of these structures lies in the fact that the periodicity of the waves is used to reflect them. 
 
 Some dispositions of resonant structures are described: basins having a length equal to a quarter of the wave length, resonators similar to pipes of different types, one of them having a perio
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Claeys, Jonas, Jeroen Van Wittenberghe, Patrick De Baets, and Wim De Waele. "Characterization of a resonant bending fatigue test setup for pipes." International Journal Sustainable Construction & Design 2, no. 3 (2011): 424–31. http://dx.doi.org/10.21825/scad.v2i3.20541.

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This paper discusses the resonant bending fatigue test setup designed at laboratory Soete forfull-scale fatigue tests on pipes. Following an enumeration of other types of fatigue test setups an attempt ismade to characterise the resonant bending machine. The characterisation is obtained by conductingdifferent tests on a steel pipe of grade API X65. Concordance between measured and calculated stressesand influence of excentre position on stress amplitude is discussed. High frequencies and small powerinput make this test setup very effective. The analytical model correctly predicts the measured
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Beaney, E. M. "The Effect of Plasticity on Resonant Pipe Vibration." Journal of Applied Mechanics 58, no. 3 (1991): 738–42. http://dx.doi.org/10.1115/1.2897257.

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An understanding of the response of pipework systems to high levels of seismic excitation is required to enable aseismic design methods to be securely based. Theoretical and experimental modeling of simple systems and components demonstrate that plasticity in the pipe wall controls the vibration response level and that, because of an unexpected level of material strain hardening, in pressurized pipes, simple elastic modal and frequency analysis are satisfactory. Given the correct material properties an energy balance approach correctly predicts the steady.
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Korneev, Valeri. "Resonant seismic emission of subsurface objects." GEOPHYSICS 74, no. 2 (2009): T47—T53. http://dx.doi.org/10.1190/1.3068448.

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Numerical modeling results and field data indicate that some contrasting subsurface objects (such as tunnels, caves, pipes, filled pits, and fluid-filled fractures) are capable of generating durable resonant oscillations after trapping seismic energy. These oscillations consist of surface types of circumferential waves that repeatedly propagate around the object. The resonant emission of such trapped energy occurs primarily in the form of shear body waves that can be detected by remotely placed receivers. Resonant emission reveals itself in the form of sharp resonant peaks for the late parts o
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Seryakov, Arkady Vladimirovich. "Resonant vibration heat transfer coefficient increase of short low-temperature heat pipes." International Journal of Heat and Mass Transfer 158 (September 2020): 119764. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2020.119764.

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Mukhin, Nikolay, and Ralf Lucklum. "Periodic Tubular Structures and Phononic Crystals towards High-Q Liquid Ultrasonic Inline Sensors for Pipes." Sensors 21, no. 17 (2021): 5982. http://dx.doi.org/10.3390/s21175982.

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The article focuses on a high-resolution ultrasound sensor for real-time monitoring of liquid analytes in cylindrical pipes, tubes, or capillaries. The development of such a sensor faces the challenges of acoustic energy losses, including dissipation at liquid/solid interface and acoustic wave radiation along the pipe. Furthermore, we consider acoustic resonant mode coupling and mode conversion. We show how the concept of phononic crystals can be applied to solve these problems and achieve the maximum theoretically possible Q-factor for resonant ultrasonic sensors. We propose an approach for e
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Dissertations / Theses on the topic "Resonant pipes"

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Jelínek, Petr. "Návrh sacího traktu s variabilní délkou pro experimentální zážehový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254363.

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This thesis discusses of the intake tract four-stroke ignition internal combustion engine and the filling efficiency and opportunities to increase this efficiency and consequently to optimize the course of torque and power at the specified serial engine. 3D model is the last point of this thesis.
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Hirota, Masato. "An Experimental Study of Fibre SuspensionFlows in Pipes using Nuclear MagneticResonance Imaging." Thesis, KTH, Mekanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202628.

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This study deals with fibre suspension flows through cylindrical pipes. Thepresent work aims at measurements of opaque flows, which are common inindustries. Nuclear magnetic resonance imaging (NMRI) and ultrasound velocimetryprofiling (UVP) were employed as non-invasive and optic-independenttools to measure the velocity profiles. As a first experiment, a paper-pulp suspensionflow through a sudden contraction and expansion was investigated.The results show the NMRI technique can be used to measure the stronglyunsteady flow such as separated regions though the MR signal is attenuateddue to the t
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Rasolonjanahary, Irina. "Wave propagation in pipes of slowly-varying radius with compressible flow." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277876.

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The work presented in this thesis studies acoustic perturbations in slowly varying pipes. The slow variation is introduced in the form of a small parameter ${\epsilon}$ and through this in turn gives rise to a slow axial scale $X$ such that $X = {\epsilon}x$ where $x$ is the normal axial coordinate. This allows an asymptotic approach and the WKB method is used to solve the subsequent mathematical problems. The first deals with the existence of a trapped mode in a hard-walled pipe of varying radius conveying fluid. For the derived leading order propagating mode solution, its amplitude becomes s
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Usman, Muhammad. "Inductive weld of joints for optical fiber pipe." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-32065.

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The current study presents an induction heating system design for fiber optics pipes joints. Remote heating methods are probably inconvenient due to non-uniform heat distribution resulting in unreliable joints. The induction heating generates uniform heat distribution which can be achieved by proper designing of inductive heating coil, and power system inverter that drives the induction system. Two different shaped open jaw type heating coils were designed i.e open claw type coil (OCTC) and curved spiral rectangular coil (CSRC). The coils were designed in COMSOL simulation software to check th
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Krehnovi, Emily M. "Resonate Energy Conversion: Analysis of a Lunar Tide Power Plant Using a Variable Area Pipe." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1366991503.

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Pinto, Otávio de Oliveira. "Desenvolvimento e comissionamento de máquina para testes de fadiga por ressonância em dutos rígidos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/179527.

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Este trabalho descreve a metodologia desenvolvida para fabricação e comissionamento de um novo conceito de máquina para realização de testes de fadiga por ressonância de tubos rígidos em escala real, visando oferecer soluções técnicas para determinados pontos de melhoria encontrados em equipamentos já existentes. O equipamento foi desenvolvido sob os conceitos de análise vibratória, com o auxílio de ferramentas de CAD e método de elementos finitos. A metodologia de projeto do equipamento foi desenvolvida através de projeto conceitual e seleção de conceito, atingindo evolução gradual através de
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Engineer, Bhavin Arun. "The mechanical and resonant behaviour of a dry coupled thickness-shear PZT transducer used for guided wave testing in pipe line." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/13910.

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The guided wave technique is an ultrasonic technique which is used to monitor large structures in a variety of industry sectors to safeguard against catastrophic failure. The guided wave technique for pipeline inspection has been commercially used since the early 2000s and this facilitates rapid inspection where from a single location over 100 metres of pipeline can be inspected. This technique is currently being used in pipeline infrastructure across the globe. For the technique to be successful it is highly dependent on a numerous of factors including, frequency selection, array designs and
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Taylor, Alan. "The effects of centrifugal blowers, control valves, attenuating devices and reservoir resonance on organ pipe flutter." Thesis, University of Salford, 2019. http://usir.salford.ac.uk/49776/.

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The aim of this research is to investigate the noticeable organ pipe flutter that may, under certain conditions, exist on a sounding organ pipe. The effectiveness of a pipe organ wind system is notoriously difficult to predict. For many years pipe organ builders have been aware of organ pipe flutter and several have tried to address the problem with little success. For pureness of tone it is important that the wind system is perfectly steady and without any imperfections that may cause organ pipe flutter. A survey of 83 UK pipe organs, was conducted by 8 organ tuners, confirms that 57% of the
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Salles, Rafael. "Experimental analysis of fluid-structure interaction phenomena on a vertical flexible cylinder: modal coeficients and parametric resonance." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-25082016-085120/.

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Oil and gas exploitation in deep waters has become more than just a profit business to be a daily necessity, since the world energy matrix is based on fossil components. Risers are offshore structures that are intimately linked with oil and gas exploitation and those are subjected to a great variety of effects in field, e.g., marine currents, Vortex Induced Vibration (VIV), heave motion caused by gravitational waves, non-linear contact with the sea floor, and many others. Riser dynamics is essentially non-linear and experimental tests in real scale are almost impossible due to a great variety
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Chlíbek, Lukáš. "Návrh výfukového potrubí pro vůz Formule SAE." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228025.

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Diploma thesis is bent on engineering design exhaust manifold for motor Formula SAE. Drive unit is here used atmospheric water-cooled gas- engine from motorcycle Yamaha YZF R6, 2005 model year. The design of the exhaust manifold is drawn to fulfil Formula SAE conditions.
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Books on the topic "Resonant pipes"

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K, Stubos A., ed. Aerodynamically generated acoustic resonance in a pipe with annular flow enlargements and restrictors. Von Karman Institute for Fluid Dynamics, 1991.

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Book chapters on the topic "Resonant pipes"

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Ngoc, Tran D. K., Kin W. Ng, and Qigao Zhu. "Resonant Modes in Centrifugally Cast Stainless Steel (CCSS) Pipes." In Review of Progress in Quantitative Nondestructive Evaluation. Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0817-1_268.

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Eargle, John M. "Resonance Frequency for Pipes Open at One End." In Electroacoustical Reference Data. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2027-6_13.

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Eargle, John M. "Resonance Frequency for Pipes Open at Both Ends." In Electroacoustical Reference Data. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2027-6_11.

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Amielh, M., F. Anselmet, Y. Jiang, et al. "Controlling the Acoustic Resonance in a Corrugated Flow Pipe." In Fluid-Structure-Sound Interactions and Control. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40371-2_37.

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MacFall, J. S., and G. A. Johnson. "Water uptake patterns in loblolly pines as seen with magnetic resonance microscopy." In The Rhizosphere and Plant Growth. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3336-4_25.

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Jalink, H., and D. Bicanic. "The Resonant Photoacoustic Heat Pipe Cell for Spectral Investigation of Low Volatility Liquids and Solids." In Photoacoustic and Photothermal Phenomena II. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-540-46972-8_134.

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Yoshikawa, Shigeru. "Vortices on Sound Generation and Dissipation in Musical Flue Instruments." In Vortex Dynamics Theories and Applications. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.91258.

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Musical flue instruments such as the pipe organ and flute mainly consist of the acoustic pipe resonance and the jet impinging against the pipe edge. The edge tone is used to be considered as the energy source coupling to the pipe resonance. However, jet-drive models describing the complex jet/pipe interaction were proposed in the late 1960s. Such models were more developed and then improved to the discrete-vortex model and vortex-layer model by introducing fluid-dynamical viewpoint, particularly vortex sound theory on acoustic energy generation and dissipation. Generally, the discrete-vortex model is well applied to thick jets, while the jet-drive model and the vortex-layer model are valid to thin jets used in most flue instruments. The acoustically induced vortex (acoustic vortex) is observed near the amplitude saturation with the aid of flow visualization and is regarded as the final sound dissipation agent. On the other hand, vortex layers consisting of very small vortices along both sides of the jet are visualized by the phase-locked PIV and considered to generate the acceleration unbalance between both vortex layers that induces the jet wavy motion coupled with the pipe resonance. Vortices from the jet visualized by direct numerical simulations are briefly discussed.
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Leenheer, Jerry A., and Gary E. Maciel. "Preparation of Low-Carbon Sediments from the Mississippi River and Certain Tributaries for Solid-state CPMAS 13C NMR Analysis." In Nuclear Magnetic Resonance Spectroscopy in Environment Chemistry. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195097511.003.0024.

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The nature of organic carbon in aquatic sediments and soils with low carbon contents and significant contents of paramagnetic elements such as iron and manganese is difficult to assess by solid-state, cross-polarization magic angle spinning (CPMAS) 13C nuclear magnetic resonance (NMR) spectrometry because of the inherent low sensitivity of 13C NMR analyses, and band broadening and sensitivity losses caused by paramagnetic elements. Other investigators have addressed this problem in the analysis of soils by enriching the organic carbon content by flotation, by magnetic separation of paramagnetic minerals, and by chemical reduction of iron by stannous chloride and sodium dithionite. In this study, they found that satisfactory 13C NMR spectra could be obtained if the C/Fe ratio was greater than 1 wt%. Each of the physical and chemical treatments used to increase the C/Fe ratio resulted in losses of organic matter and changes in the nature of organic matter through physical fractionation and chemical alteration. Suspended stream sediments frequently have equivalent contents of organic carbon and sesquioxide coatings with which the organic matter is associated. These sesquioxide coatings consist predominantly of iron and manganese oxyhydroxides that cause problems with NMR analyses. In this chapter we describe a method to enrich organic matter and remove iron and manganese from low-carbon sediments sampled from the Mississippi, Illinois, and Ohio Rivers with minimal loss and alteration of the organic matter. The second objective is to characterize the sedimentary organic matter by 13C NMR using recent advances that increase instrument sensitivity. Suspended and bed sediments were collected during a sampling cruise on the Mississippi River during May–June 1990. Fine bed sediments were collected in depositional regions of the river or tributaries with a pipe dredge. Suspended silts were collected using a continuous-flow centrifuge operated on board the Research Vessel Acadiana. Both bed sediments and suspended silts were freeze-dried prior to additional treatment procedures and NMR analyses. A flow chart of selective mineral dissolution procedures is presented in Figure 17.1. The acid pyrophosphate treatment6 was placed first in the sequence to remove calcium and magnesium minerals that would form insoluble oxalates in the following extraction.
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Fan, L., B. R. Wang, T. Jin, Y. Shen, and S. Y. Zhang. "Study on thermoacoustic resonance pipe driven by loudspeaker using two-microphone method." In Proceedings of the Twentieth International Cryogenic Engineering Conference (ICEC20). Elsevier, 2005. http://dx.doi.org/10.1016/b978-008044559-5/50083-1.

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Conference papers on the topic "Resonant pipes"

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Vaziri, A., H. Nayeb-Hashemi, and H. E. Estekanchi. "Dynamic Response of Cracked Cylindrical Shells With Internal Pressure." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33582.

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Sub-surface cracks in pipelines with internal pressure may severely affect their dynamic response. The extreme cases of these cracks are when these cracks go through the thickness of the pipes. Dynamic responses of cracked and un-cracked pipes with fixed ends and under various internal pressures were evaluated experimentally and theoretically. In the experimental part, the effects of pipe internal pressure on the resonant frequencies and damping of the pipe were evaluated. In the theoretical part, finite element analyses were performed to find dynamic response of pipes with various crack lengt
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Van Wittenberghe, Jeroen, Patrick De Baets, Wim De Waele, Wouter Ost, Matthias Verstraete, and Stijn Hertele´. "Pipe Resonant Bending Fatigue Test Setup With Optical Measurement System." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31115.

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Pipes and tubular members are used in offshore applications as structural elements such as columns or in transport pipelines, risers etc. When subjected to dynamic loads, weld defects or geometrical stress raisers can initiate fatigue cracks causing the columns or pipelines to fail prematurely. In order to investigate the fatigue behaviour of pipe joints, a resonant bending fatigue setup was designed, suitable for testing pipes within a diameter range from 6″ to 20″. In this setup the pipe, filled with water, is subjected to a dynamic excitation force with a frequency close to the natural freq
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Jhingran, Vikas, Johnny Vogiatzis, Juan P. Pontaza, and Li Lee. "Non-Resonant In-Line VIV and Its Implications on Model Tests." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20596.

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Recently, small-scale experiments were conducted by [1] to study in-line VIV in pipe spans. The experiments were performed with six different pipes of varying stiffness and mass ratio, but with the same length-to-diameter ratio. The response of the pipe with the lowest mass and stiffness, made out of Acrylonitrile Butadiene Styrene (ABS), was surprising. The in-line RMS A/D response of the ABS pipe was larger and over a much wider reduced velocity range than shown in design codes like DnV F105. Since these codes are commonly used to design real pipelines, the authors were interested in underst
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Nateghi, Alireza, Luca Sangiuliano, Claus Claeys, Elke Deckers, Bert Pluymers, and Wim Desmet. "VIBRATION ATTENUATION IN PIPES: DESIGN AND EXPERIMENTAL VALIDATION OF A RESONANT METAMATERIAL SOLUTION." In 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2017. http://dx.doi.org/10.7712/120117.5761.17379.

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Moussou, Pierre, Rene´ Jean Gibert, Gilles Brasseur, Christophe Teygeman, Je´roˆme Ferrari, and Jean-Franc¸ois Rit. "Instability of Pressure Relief Valves in Water Pipes." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77300.

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Pressure relief valves in water pipes are known to sometimes chatter when the inlet pressure slightly exceeds the maximum allowable working pressure (MAWP) value. Though these devices are responsible for numerous fatigue issues in process industries, there is a relatively low number of technical publications describing well-established facts about them, especially for heavy fluids. The present study is intended as a contribution to the understanding of pressure relief valve dynamics, taking into account fluid-structure interactions. A series of tests was performed with a water relief valve upo
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Prek, Matjaz. "Wavelet Transform of Sound Signal in Fluid-Filled Viscoelastic Pipes." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21002.

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Abstract In viscoelastic pipes, where the material properties depends on a complex bulk modulus as well as on a complex shear modulus, the sound field within the fluid is affected. Therefore, the dispersion of flexural waves occurs in the pipe, while the speed of flexural waves decreases due to the coupled fluid mass. Coupling between the pipe wall and the fluid as decreases the sound speed in the fluid. Likewise, the speed of sound in fluid is frequency-dependent, just as the group velocity of bending waves depends on the frequency. Wavelet transform of non-stationary sound signal was used to
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Prek, Matjaz. "Wavelet Analysis of Sound Signal in Fluid-Filled Viscoelastic Pipes." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33370.

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In viscoelastic pipes, where the material properties depends on a complex bulk modulus as well as on a complex shear modulus, the sound field within the fluid is affected. Therefore, the dispersion of flexural waves occurs in the pipe, while the speed of flexural waves decreases due to the coupled fluid mass. Coupling between the pipe wall and the fluid also decreases the sound speed in the fluid. Likewise, the speed of sound in fluid is frequency-dependent, just as the group velocity of bending waves depends on the frequency. Wavelet transform of non-stationary sound signal was used to identi
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Shang, Xia, Hua Zhou, Anhuan Xie, and Jiabin Zhu. "Filtering Characteristics of String Hydraulic Pulsation Attenuator." In ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5312.

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In order to attenuate the pulsation of the hydraulic systems, the string hydraulic pulsation attenuator is proposed using the principle of mechanical vibration absorption. We present a new type of mechanical structure that can attenuate the pulsation as well as reduce the noise. Elastic strings and fluid can be seen as a forced vibratory system. Resonant cavities isolated by inner pipes of the string hydraulic pulsation attenuator and the damping orifices on inner pipes constitute the Helmholtz resonant structure. It’s a way to realize the effect of structural resonant and fluid resonant filte
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Mohamed, S., H. R. Graf, and S. Ziada. "Aeroacoustic Source of a Shallow Cavity in a Pipeline." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57437.

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The flow-induced acoustic source of an axisymetric shallow cavity, coupled to longitudinal acoustic modes in a pipeline is characterized experimentally for circular pipes conveying fully developed turbulent flow. This aeroacoustic source is generated due to the interaction of the cavity shear layer oscillation with the resonant acoustic field in the pipe. The distributed aeroacoustic source is modeled by a lumped acoustic dipole source which is dependent on the Strouhal number and the acoustic particle velocity at the cavity. The amplitude and phase of this source are determined experimentally
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Goyder, H. G. D., M. J. Every, T. P. Jee, C. P. Saunders, and R. J. Swindell. "An Analysis of Structural-Acoustic Coupling in a Side Branch." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71325.

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Side branches are small diameter pipes attached to a main pipeline. If a high noise level is present in the pipeline then the side branch may suffer from damaging vibration or fatigue. The mechanics of the vibration involve an acoustic resonance of the fluid within the side branch which is coupled to a structural resonance. The particular conditions investigated in this paper are where the acoustic and structural natural frequencies coincide. It is shown that the resonant vibration amplitude is controlled by the following factors: (i) the degree of correlation of the acoustic wavelength with t
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