Relevant bibliographies by topics / Flexible pipe vibration study

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Flexible pipe vibration study'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Flexible pipe vibration study"

1

Yang, Yang, Guang Pan, Shaoping Yin, and Ying Yuan. "Experiment Investigate on the Effectiveness of Flexible Pipes to Isolate Sea-Water Pump Generated Vibration." Coatings 10, no. 1 (January 3, 2020): 43. http://dx.doi.org/10.3390/coatings10010043.

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Vibration control is important in maintaining the silence of the underwater vehicle. Among the many methods of vibration control, isolation is by far the most efficient approach. However, as one of the major vibration sources in underwater vehicle, the vibration isolation of the sea-water pump has not been well explored. The sea-water pipe is the primary vibration transmit path from the sea-water pump to the housing. In order to realize the vibration isolation of the sea-water pump, the sea-water pipe must have certain flexibility and damping. In this study, scaled model tests were carried out to investigate the isolation effectiveness of flexible pipes in isolated sea-water pump. Specifically, three types of flexible pipes, i.e., double layer metal bellows (DLMB), rubber pipes (RP) and bellows coated rubber (BCR) were designed and tested. Tests were carried out under the operation rotate speeds of the sea-water pump. Our results show that compared with single layer metal bellows (SLMB), the isolation effectiveness of DLMB and BCR were significant and stable in high frequency regions. The optimal pipe can be chosen for different vibration reduction requirements in practical engineering.
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Fattah, Mohammed Yousif, Waqed Hammed Hassan, and Sajjad Emad Rasheed. "Behavior of Flexible Buried Pipes Under Geocell Reinforced Subbase Subjected to Repeated Loading." International Journal of Geotechnical Earthquake Engineering 9, no. 1 (January 2018): 22–41. http://dx.doi.org/10.4018/ijgee.2018010102.

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The present article constitutes an experimental investigation of the behavior of buried PVC pipes. A number of laboratory experiments were conducted using PVC pipes which were buried in a medium sand layer, below a subbase layer, reinforced with geocells. They were subject to repeated dynamic load amplitudes of 0.5 and 1 ton and loading frequencies of 0.5, 1 and 2 Hz, to study the effects of the geocell reinforcement layer, in terms of the amount of stress reaching the pipe crown and the vibration of the pipe. A 3D numerical model was also developed to investigate the performance of the geocell above the buried pipe. The predicted characteristics of the buried pipes were validated using the experimental data. The results showed that geocell reinforcement decreases both crown vibration by 35%, and the vertical pressure reaching the pipe by 41%. The numerical models have a good fit with the experimental work results, both confirming that geocell reinforcement has a significant role to play regarding increasing the safety of pipes.
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Wang, Zhicheng, Michael S. Triantafyllou, Yiannis Constantinides, and George Em Karniadakis. "An entropy-viscosity large eddy simulation study of turbulent flow in a flexible pipe." Journal of Fluid Mechanics 859 (November 23, 2018): 691–730. http://dx.doi.org/10.1017/jfm.2018.808.

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We present a new approach – the entropy-viscosity method (EVM) – for numerical modelling of high Reynolds number flows and investigate its potential by simulating fully developed incompressible turbulent flow, first in a stationary pipe and subsequently in a flexible pipe. This method, which was first proposed by Guermondet al.(J. Comput. Phys., vol. 230 (11), 2011, pp. 4248–4267), introduces the concept of entropy viscosity, computed based on the nonlinear localized residual obtained from the energy equation. Specifically, this nonlinear viscosity based on the local size of entropy production is added to the spectral element discretization employed in our work for stabilization at insufficient resolution. Unlike its original formulation, which includes anad hoctuneable parameter$\unicode[STIX]{x1D6FC}$, here, we determine the value of$\unicode[STIX]{x1D6FC}$by assuming that the entropy viscosity is analogous to the eddy viscosity of the Smagorinsky model. However, the overall approach has the flavour of the implicit large eddy simulation (ILES) instead of the standard large eddy simulation (LES). Given the empiricism of our approach, we have performed systematic studies of homogeneous isotropic turbulence for validation (see appendix A). We have also carried out a more complete numerical simulation study to investigate incompressible turbulent flow in a stationary pipe at$Re_{D}=5300$and$Re_{D}=44\,000$, following the work of Wu & Moin (J. Fluid Mech., vol. 608, 2008, pp. 81–112) who performed very accurate direct numerical simulations (DNS) of these two cases. We found that the mean flow, turbulence fluctuations, and two-point correlations of the EVM-based LES are in good agreement with the DNS of Wu & Moin despite the fact that we employed grids with resolution two orders of magnitude smaller. If we instead use the standard Smagorinsky model in our simulations, the computations become unstable due to insufficient resolution of the smaller scales. Another important difference is that the entropy-viscosity model scales with the cube of the distance from the wall and approaches zero at the wall, which is theoretically correct, as shown by oura posterioritests. Based on the validated EVM approach, we then simulated fully developed turbulent flow at$Re_{D}=5300$in a flexible pipe subject to prescribed vibrations in the cross-flow plane corresponding to a standing wave of amplitude$A$and wavelength$\unicode[STIX]{x1D706}=3D$, where$D=2R$is the pipe diameter and$R$is the radius. We have simulated 11 cases corresponding to increasing values of wave steepness$s_{o}=2A/\unicode[STIX]{x1D706}$, with$s_{o}\in [0,0.067]$. We found a quadratic dependence of the friction factor on$s_{o}$with the minimum at approximately$s_{o}\approx 0.01$, so, surprisingly, we have a slight decrease in drag at first and then a substantial increase compared to the stationary pipe. To obtain the turbulence statistics, we averaged the simulated flow over twenty time periods at the nodes and anti-nodes separately. We found substantial changes in the mean velocity profile at distances$(1-r)^{+}>5$while the peaks of turbulent intensities were amplified by 50 % in the axial direction and by 200 % in the normal and azimuthal directions at$s_{o}=0.067$. The peak shear stress at the node increased by more than 200 % whereas at the anti-node it attained negative values. Turbulent budgets revealed large changes close to the wall at$(1-r)^{+}<50$while flow visualizations showed that many more strong worm-like vortices were generated in the near-wall regions compared to the stationary pipe. We have also computed various spatio-temporal correlations that show that the pressure fluctuations are very sensitive to the pipe vibration and scale quadratically with$s_{o}$. Both pressure and velocity correlations exhibit cellular patterns consistent with the standing-wave pipe motion.
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Wang, Jialu, Fabo Chen, Chen Shi, and Jiuzheng Yu. "Mitigation of Vortex-Induced Vibration of Cylinders Using Cactus-Shaped Cross Sections in Subcritical Flow." Journal of Marine Science and Engineering 9, no. 3 (March 7, 2021): 292. http://dx.doi.org/10.3390/jmse9030292.

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Flexible cylinders, such as marine risers, often experience sustained vortex-induced vibrations (VIVs). Installing helical strakes on a riser is the most widely used technique to mitigate VIVs. This study was inspired by the giant Saguaro Cacti which can withstand strong wind with a shallow root system. In this study, numerical simulations of flow past a stationary cylinder of a cactus-shaped cross-section in a two-dimensional flow field at a subcritical Reynolds number of 3900 were performed. Results show that cylinders of a cactus-shaped cross-section have a lower lift coefficient without increasing drag compared to those of a circular cylinder. VIV experiments on a single flexible pipe as well as on a set of two tandem-arranged flexible pipes were conducted at different reduced velocities to investigate the effects of the streamwise spacing and wake of the cactus-like body shape on VIV mitigation. Experimental results show that the cactus-like body shape can mitigate VIV responses of the cylinder at upstream position with no cost of increased drag; however, similar to helical strakes, the efficiency of VIV mitigation for the cylinder at downstream position is reduced. Although the cactus-like body shapes tested in this study were not optimized for oscillation suppression, still this study suggests that modification of the cross-sectional shape to a well-designed cactus-like shape has potentials to be used as an alternative technology to mitigate VIV of marine risers.
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Carpenter, Chris. "Study Recognizes and Assists in Mitigation of Bottomhole Assembly Lateral Vibration Chatter." Journal of Petroleum Technology 72, no. 12 (December 1, 2020): 55–56. http://dx.doi.org/10.2118/1220-0055-jpt.

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 197231, “Recognition and Mitigation of the Bottomhole Assembly Lateral Vibration Chatter Mode,” by Jeffrey R. Bailey, SPE, and Harshit Lathi, ExxonMobil, and Matthew T. Prim, SPE, ADNOC, et al., prepared for the 2019 Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, 11-14 November. The paper has not been peer reviewed. Lateral vibration modeling of certain bottomhole assembly (BHA) designs has shown great sensitivity to the proximity of stabilizer blades. This paper explores the nature of the vibrational dysfunction known as BHA chatter. A field-proven frequency-domain model illustrates the cause of the dysfunction, its rotary-speed dependence, and mitigation methods and results. The complete paper provides three case studies exploring this phenomenon, one of which is included in this synopsis. Introduction The authors first describe the similarities and differences of a BHA and a stringed instrument. The string of a violin, for example, typically has two fixed nodal points: the first at the bridge, which does not change, and the second at the position of the musician’s finger, which is moved along the fingerboard in order to play notes of different frequencies. The finger pressing on the string causes it to have zero displacement at that location, which defines a nodal point. Additional nodal points may occur in the motion of the string as harmonics of the fundamental mode, but these are not considered to be fixed nodes because the amplitudes of the harmonics vary. The string is relatively flexible, so it can be described adequately with a second-order differential equation. Significantly, a BHA typically has more than two nodes. A lateral wave propagating along the BHA must satisfy the nodal point constraint of zero lateral deflection at all these locations. These nodes typically are placed without regard to the frequency of the wave traveling along the string, which is governed by the rotary speed and the type of lateral excitation. The geometric compatibility requirement that the pipe has zero displacement at the fixed nodes has ramifications. The nodal point constraints force the pipe to adapt to the locations of these nodes through contact forces that literally push the pipe back into position to honor the constraints. In some scenarios, this process requires large forces. One consequence of large forces pushing the pipe to maintain geometric compatibility is that these forces are applied to the outer diameter of a body that is rotating, so this response may also generate torque and associated wear of the contacting surfaces. This observation applies to both static and dynamic forces but most commonly is recognized in the static domain. It is not typically recognized in dynamics as applied to BHA design.
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Kordubaylo, Aleksey, Boris Simonov, and Yuri Pronkin. "WORKING PARAMETERS OF LOAD-BEARING ELEMENT OF HOLE VIBRATION SOURCE." Interexpo GEO-Siberia 2, no. 4 (2019): 98–106. http://dx.doi.org/10.33764/2618-981x-2019-2-4-98-106.

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Requirement of oil and gas industry in increasing of rate of hydrocarbon extraction from deposits contributes to development of science-based methods of oil production increasing. Vibrowave impact to productive seam is related to such methods. This impact can be effectively carried out with hole seismic signal sources. In the work results of study of load-bearing element of hole electro-magnetic pulse source are represented. Objective of the work is the study of static and dynamic strains of casing pipe, determination of values of pressure pulses at modified load-bearing element during its work with electro-magnetic striking center. Values of static and dynamic strains of casing pipe under the action of thrust force are experimentally determined. The values are located in flexible zone and make 1mm at the static load and from 0.35 up to 0.6mm at the pulse load. As the results of tests of vibration source prototype, dependence of pulse pressure value at load-bearing element on voltage of striking center supply under the pressure of preliminary pumping 20MPa is obtained. Pulse amplitude raises proportionally voltage in the range from 14.2 MPa up to 19.7 MPa. Experiments with increasing of pumping pressure in the range from 20 MPa up to 27 MPa have shown that ratio of pulse value to pumping pressure linearly reduces when voltage of striking center supply is constant. Obtained results are scientific basic for designing of load-bearing elements destined for work at pulse impact transfer mode.
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Xu, Bin, Jian-Fei Lu, and Jian-Hua Wang. "A Semi-Analytical Model for the Simulation of the Isolation of the Vibration Due to a Harmonic Load Using Pile Rows Embedded in a Saturated Half-Space." Open Civil Engineering Journal 4, no. 1 (March 30, 2010): 38–56. http://dx.doi.org/10.2174/1874149501004010038.

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The isolation of the vibration due to a harmonic vertical load using pile rows embedded in a saturated poroelastic half-space is investigated in this study. Using the fundamental solution for a circular patch load and Muki’s method, the second kind of Fredholm integral equations describing the dynamical interaction between the pile rows and the saturated poroelastic half-space are obtained. Numerical solution of the integral equations yields the dynamic response of the pile-half-space system. The vibration isolation effect of the pile rows is investigated via the proposed semi-analytical model. Numerical results indicate that stiffer piles have better isolation vibration effect than flexible piles. Moreover, the pile length and the spacing between neighboring piles in one pile row have significant influence on the isolation vibration effect of pile rows, while the influence of the spacing between neighboring pile rows is relatively smaller.
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Park, H. I., Y. P. Hong, M. Nakamura, and W. Koterayama. "Experimental Study on Vortex Induced Vibrations of Highly Flexible Immersed Pipe Subjected to Top End Oscillations." Journal of Waterway, Port, Coastal, and Ocean Engineering 130, no. 4 (July 2004): 207–14. http://dx.doi.org/10.1061/(asce)0733-950x(2004)130:4(207).

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Hosseinian, A., and A. H. Meghdadi Isfahani. "Experimental study of heat transfer enhancement due to the surface vibrations in a flexible double pipe heat exchanger." Heat and Mass Transfer 54, no. 4 (November 4, 2017): 1113–20. http://dx.doi.org/10.1007/s00231-017-2213-2.

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Ren, Qing, and Mao Song Huang. "Analysis for Axial Vibration and Internal Forces of Totally and Partially Embedded Pile Groups with Flexible Caps." Advanced Materials Research 163-167 (December 2010): 3860–67. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.3860.

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In this paper, a simplified analytical method is developed for the axial harmonic response of totally and partially embedded pile groups in homogeneous and layered soil deposits. Based on BDWF model, finite element sub-structure method is used to setup the dynamic model of cap-pile groups which can precisely simulate kinetic interaction and inertial interaction. A comprehensive parameter study focuses on the influence of caps’ elastic modulus and mass density on pile groups’ dynamic response, and then points out the limition of rigid cap in practical design. An approximate solution is finally presented for the internal forces distributed on pile heads due to pile-to-pile interaction. The solution of above approach was compared with that of traditional simplified model (rigid and massless cap solution) in simulating an in-site experiment and dynamics response of partially embedded pile groups for offshore wind farm.
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Dissertations / Theses on the topic "Flexible pipe vibration study"

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Champneys, Alan R. "The nonlinear dynamics of articulated pipes conveying fluid." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302850.

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Kennedy, I. "Vibration transmissibility characteristics of fibre and steel reinforced flexible pipes." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378334.

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Chen, Qinghua. "Study on passive and/or active vibration control for flexible structures." FIU Digital Commons, 1995. http://digitalcommons.fiu.edu/etd/2142.

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The purpose of this research is to present new methods of active and passive vibration control for flexible structures. The study includes: 1) passive viscoelastic damping treatment; 2 ) active vibration control using layered shape memory alloy (SMA); 3) combined application of viscoelastic damping treatment and SMA; 4) experiments. In order to maximize damping and save weight of the structure and cost, a partially covered double sandwich cantilever beam model has been presented. It is shown that the double sandwich beam is better than single sandwich beam for some conditions. To take into account of end loads effect of elastic structures such as robot arm or manipulator, a model of partially covered double sandwich cantilever beam with mass at free end is given and discussed. Also a more accurate model (Timoshenko model) is discussed. The experiments were done to verify the theoretical results. The active vibration control by means of layered shape memory alloy actuator is discussed. The layered structure is easy to implement in real application, especially for the existing structures. The control results are compared and discussed. The temperature effects are discussed. Also a model with combined application of viscoelastic damping treatment and shape memory alloy layer is presented. Both the vibration characteristics and control results are obtained and discussed. The vibration control results for different control schemes are compared and discussed. The temperature effects are also discussed
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Hixenbaugh, Franklin D. "A study on piezoelectric actuators and sensors for vibration control of flexible space structures." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA274925.

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Thesis (M.S. in Systems Technology (Space Systems Operations)) Naval Postgraduate School, September 1993.
Thesis advisor(s): Brij N. Agrawal. "September 1993." Includes bibliographical references. Also available online.
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Bircan, Mehmet. "A Study On The Effect Of Pipe - Soil Relative Stiffness On The Behaviour Of Buried Flexible Pipes." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/2/12611562/index.pdf.

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In this study, the effect of pipe-soil relative stiffness on the behaviour of buried flexible pipes was investigated considering the pipe size, material type, stiffness, pipe-soil and natural soil-backfill interfaces and geometry of the trench using the finite element method. For this purpose, a parametric study was conducted to examine the effect of different variables on the resulting earth loads and deformations imposed on the buried pipes. Various types of trench pipe-soil cases were analysed for a certain natural ground and backfill material by the PLAXIS finite element code which allows simulating non-linear soil behaviour, the stages of construction as well as the pipe-soil interaction aspects of the problem. Loads and deformations obtained by the finite element method were compared with those calculated by the conventional approaches for different pipe-soil stiffness ratios. The finite element results obtained for the deformation of typically flexible Polyethylene pipes were then used to back-calculate the range of modulus of soil reaction, E'
, values for various pipe-soil relative stiffness and they were compared with the suggested value proposed by Howard (1977).
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Juston, John M. "Theoretical and experimental study into the dynamics and control of a flexible beam with a DC-servo motor actuator." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/50029.

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Position and vibration control of a flexible beam is studied analytically and in the laboratory. Two different motor types are compared as actuators throughout the thesis: a standard voltage controlled motor and a torque controlled motor. The experimental beam is controlled with a dc-servo motor at its base and is instrumented with strain gages and a potentiometer. The control law is a form of linear, direct-output feedback. State estimators augment the control law to provide rate information that is not available from the instrumentation. Accurate modeling of the system’s inherent damping characteristics is achieved by analyzing experimental data. Gains were iterated yielding minimum-gain norm and minimum-sensitivity norm solutions to meet imposed eigenvalue placement constraints. Results for the two solutions and the two systems are compared and contrasted. Experimental verification of analytical results is hampered by unmodeled system non-linearities. Several attempts at bypassing these obstacles are shown. Finally, conclusions and recommendations are made.
Master of Science
incomplete_metadata
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CHEN, CHIEN-WEI, and 陳建瑋. "Study and Analysis of Performance of Flexible Heat Pipe." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/bcc7tk.

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碩士
國立臺北科技大學
能源與冷凍空調工程系碩士班
100
This study carried out thermal response experiment and thermal resistance experiment after tensile experiment for flexible heat pipe, and studied and discussed the variation of its performance. The material of the evaporator section and condenser section of the flexible heat pipe studied in this experiment was copper, the material of adiabatic section was stainless steel, the internal capillary structure was metal mesh, and pure water was used as work fluid. The evaporator section, adiabatic section and condenser section were connected to thermocouple wire to measure the temperature change, and to discuss the thermal response rate, equilibrium time and thermal resistance. The experimental results showed that the change in bend angle can influenced the overall thermal response time and temperature difference. However, the effect of bend angle on the evaporator section and condenser section declined as the drawing number increased, but the thermal response time and temperature curve trend of adiabatic section were influenced obviously. According to the thermal resistance experiment, the drawing number influenced the flexible heat pipe to a great extent, the increase in drawing number made the heat transfer more difficult relatively, so that the thermal resistance increased and the maximum heat transfer rate decreased.
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Tsai, Shih-Shiung, and 蔡世雄. "On the Study of Vibration Reduction of Automotive Exhaust Pipe." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/03738501925233166101.

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碩士
大葉大學
機械工程研究所碩士班
96
In this study, the modal analysis was implemented to investigate the structure of exhaust pipe in the system in which no damping and no forces were applied. First of all, CAD software was used to build a model of structure of exhaust pipe according to a certain real model. Then, FEA software was used to construct the finite element models of exhaust pipe and hanger. The modal analysis was then implemented by importing the finite element models into the CAE software. In comparison with the numerical results to the ones of a car being driven with a specific RPM (revolution per minute), the frequencies and mode shapes were obtained, and the results were analyzed and discussed to realize whether they would result in resonance to the structure of exhaust pipe or not. On the other hand, the location of each hanger of exhaust pipe, the cross section and length of hanger, the elastic modulus of the material of exhaust pipe and the tube thickness of exhaust pipe were adjusted to obtain the results which were analyzed to discuss whether the adjusted parameters had effects on the constant frequency of exhaust pipe or not. From the results in this study, it was found that the location of exhaust pipe hanger and changing of the structural shape and length of hanger would have obvious effects on the constant frequency of exhaust pipe.
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Tsai, Yung-hsing, and 蔡永興. "Study of two-dimensional vibration using flexible magnetic-assisted polishing tool." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/99954120401364025723.

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碩士
國立中央大學
機械工程研究所
99
The normal vibration directions of vibration-assisted magnetic abrasive finishing are all parallel or perpendicular to the surface of workpiece. It’s shortcomings are easily lead to more scratches on the surface, and difficult to obtain mirror effect. This study break through previous studies,design a mechanism of two-dimensional(XY plane) vibration assisted to magnetic abrasive finishing. In the study we will use the steel particles and SiC abrasive mixture composed of non-associative with a vibration-assisted magnetic abrasive finishing, then use the polishing pad with vibration-assisted, watch the SEM surface and surface roughness. Taguchi experiment can verify that, for the improvement of surface roughness parameters for the best: X Axis Frequency 1Hz, SiC weight of 2g, Grit weight 3.5g, slurry weight 3g, vibration platform speed 1500rpm, Vibration Amplitude 0.9mm, Grit numbers # 120, pole speed of 550rpm（A2B2C2D3E3F3G3H2）.And proved vibration assisted magnetic abrasive finishing method in the best parameter combinations, can effectively improve within 5 minutes of stainless steel surface roughness by the Ra0.14μm down to 0.03μm, to improve the rate of 78.57%, ground 25 minutes later more up to Ra0. 02μm, the surface to improve the rate increased to 85.71%. Then study to abrasive ratio, we got when slurry weight 3g, increase SiC weight 1g and diamond powder 1g, the surface roughness will get better. Can effectively improve within 5 minutes of stainless steel surface roughness by the Ra0.14μm down to 0.025μm, ground 25 minutes later more up to Ra0. 01μm, and get outstanding results in mirror effect. Use this abrasive ratio to polishing the rough stainless steel,can effectively improve within 5 minutes of stainless steel surface roughness by the Ra0.23μm down to 0.02μm, ground 25 minutes later more up to Ra0. 01μm, Show the best abrasive ratio have excellent improve capacity in surface roughness.
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Wang, Ying-Jie, and 王盈傑. "Study on the vibration and control of a planar flexible structure." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/47969590863711178110.

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碩士
國立雲林科技大學
機械工程系
103
Thist hesis explores the vibration control of a planar flexible structure. The structure is composed of 13 rigid links interconnected by springs. The center of the structure is subject to a periodic disturbing force. According to the principle of dynamic vibration absorber, vibrations of the structure are minimized when the disturbance frequency is equal to certain “absorber frequencies”, which are equal to the natural frequencies of the systemwhen the center of the structure is artificially fixed in space. The natural frequencies and absorber frequencies are determined with the help of a multibody dynamics simulation software. The mode shapes associated with the absorber frequencies are also found. A physical structure is constructed for experimentation via 3D printing. In the experiments, periodic disturbance is generated by a brushless motor driving an eccentric load. By controlling the angular speed of the brushless motor, the disturbance frequency can be adjusted in order to obtain a frequency response of the planar structure.
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Books on the topic "Flexible pipe vibration study"

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Chun, R. C. Parametric study of pipe whip analysis. Washington, D.C: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1987.

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Book chapters on the topic "Flexible pipe vibration study"

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Ishihsra, Daiki, Yoshiaki Terumichi, and Shoichiro Takehara. "A Study on Coupled Vibration Between Flexible Body and Rigid Body in Tethered System." In Vibration Engineering for a Sustainable Future, 219–25. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-46466-0_30.

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Kilian, F. Johannes, Hubert Gattringer, Klemens Springer, and Hartmut Bremer. "Comparative Study on Sensorless Vibration Suppression of Fast Moving Flexible Linear Robots." In Computer Aided Systems Theory - EUROCAST 2013, 305–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-53862-9_39.

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Keber, Marko, Marian Wiercigroch, and Jerzy Warminski. "Parametric Study for Lock-In Detection in Vortex-Induced Vibration of Flexible Risers." In IUTAM Symposium on Nonlinear Dynamics for Advanced Technologies and Engineering Design, 147–58. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5742-4_12.

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Leung, P. S., I. A. Craighead, and T. S. Wilkinson. "A Theoretical Study into the Effects of Damped Flexible Foundations on the Dynamic Behaviour of a 660MW LP Steam Turbine." In Vibration and Wear in High Speed Rotating Machinery, 253–61. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-1914-3_15.

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Peláez, Gerardo, Higinio Rubio, Estela Souto, and Juan Carlos García-Prada. "Optimal Model Reference Command Shaping for vibration reduction of Multibody-Multimode flexible systems: Initial Study." In Advances in Mechanism and Machine Science, 4033–43. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20131-9_402.

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Xu, Guangde, Zhongqiu Gou, and Bainan Zhang. "Study of Flexible Spacecraft Pointing Control Based on Integrated Vibration Isolation and Pointing Stewart Platform." In Lecture Notes in Electrical Engineering, 453–60. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4163-6_54.

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"Pipe flow noise and vibration: a case study." In Fundamentals of Noise and Vibration Analysis for Engineers, 441–87. Cambridge University Press, 2003. http://dx.doi.org/10.1017/cbo9781139163927.009.

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"Cross-Sectional Design and Case Study for Steel Reinforced Flexible Pipe." In Advances in Pipes and Pipelines, 333–41. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119041290.ch21.

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"Cross-Sectional Design and Case Study for Steel Wire Bonded Flexible Pipe." In Advances in Pipes and Pipelines, 543–56. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119041290.ch34.

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Conference papers on the topic "Flexible pipe vibration study"

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Liu, Y., C. Shi, Z. Liu, J. Wang, and X. Bao. "Experimental Study on Flexible Bare Pipe Arrays Undergoing Vortex-Induced Vibrations." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78471.

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Vortex-induced vibration (VIV) excited by current is a major contributor to the fatigue accumulation of marine risers. For deepwater operations, several risers are often arranged together in an array configuration. In this study, a set of four identical flexible pipes of a rectangular arrangement were tested in a water tunnel. By comparing the dynamic responses of a pipe in an array with that of a single isolated pipe, the effects of the current speed and the center-to-center distance between the up-stream and downstream pipes on their dynamic responses were investigated. Fatigue damages accumulated on each pipe in an array was calculated and a factor, termed “fatigue damage amplification factor”, was defined as a ratio between the fatigue damage rate of pipe in an array and the fatigue damage rate of a single pipe at a same current condition. The results showed that for bare pipes (i.e., without helical strakes), the downstream pipes in an array configuration may have larger dynamic responses and fatigue damage rates than those of a single pipe; and, it is not always conservative to assume that the fatigue damage rate estimated for a single pipe can be used to represent the fatigue damage rates of pipes in an array. This preliminary study provided some meaningful results for the design, analysis and operation of marine riser arrays.
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Tan, Zhimin, Andrew Ethridge, Terry Sheldrake, and Richard Clements. "Analysis of Flow Induced Vibrations Effect on Service Life of Unbonded Flexible Pipe." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51207.

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High frequency vibrations have been reported on flexible pipes for gas export risers installed on platforms offshore in the North Sea. The vibrations are believed to be caused by internal flow vortex shedding as pressured gas passes through the bore at a certain speed. The vibration frequency is typically above 150Hz resulting in approximately 100 billion cycles over the service life. This paper presents analytical models developed to assess the alternating stresses of the strength components induced by the flow-induced carcass vibration, and the consequent influence over their fatigue damage and overall pipe structure integrity. The studied strength layers include the interlocked carcass layer, interlocked hoop strength (pressure armor) and axial tension layers. The models illustrate the behavior of these components inside both the end fitting structure and the free suspended section. The study of a large 15 inch inner diameter gas export riser is presented with test measurements reported in literature.
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Zhou, Chongyao, Gang Xu, Zhiming Huang, Dagang Zhang, Naiquan Ye, and Svein Sævik. "The Study on the Influence of Pipe-Soil Interaction on VIV for Different Free Span Types." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61117.

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Subsea pipeline laid on the seabed will experience free span when the lay path is long and seabed is rugged. Hydrodynamic loads caused by the currents around the pipeline can induce oscillations in both cross-flow and in-line directions. This phenomenon is called vortex-induced vibration (VIV) which is the most common case that could induce serious fatigue problems. The pipe-soil interaction is one of the main factors that influence the vibration. In this paper, a study focusing on the effect of pipe-soil interaction on VIV for different types of free span is presented. The Milan wake oscillator is applied to calculate the dynamic response induced by VIV in Orcaflex, and the results are compared with experimental data to identify its validity. A sensitivity study is also performed to study the parameter influence of the Milan wake oscillator model. Four types of free span (including the multiple free spans) are modeled in Orcaflex and time domain VIV analysis is carried out to study the influence of pipe-soil interaction. Comparison among different types of free span is discussed. The influence of structural damping is studied for flexible pipe only because its influence on steel pipe is negligible. The influence of structural damping on flexible pipe is studied by means of a predefined moment-curvature curve. In addition, several cases are studied to investigate the influence of tension on VIV by Milan wake oscillator.
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Inoue, Tomoya, Hiroyoshi Suzuki, Tokihiro Katsui, Keita Tsuchiya, and Yusuke Notani. "Experimental and Numerical Study of Motion of Rotating Drill Pipe Owing to Magnus Effect." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96602.

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Abstract During riserless drilling operations conducted in some scientific drillings and the initial stages of all oil and gas drilling operations, drill pipe motions such as vortex induced vibration, whirl motion, and motion due to the Magnus effect are generated. The last motion represents an interesting and important phenomenon that generates a lift force in addition to a drag force due to the ocean current and the rotation of the drill pipe. Accordingly, this study focuses on the drill pipe motions owing to the Magnus effect. An analytical model of a drill pipe was established by applying an absolute nodal coordinate formulation (ANCF) that can capture the behavior of a relatively flexible and long pipe, such as a drill pipe. The lifting and drag forces are calculated using computational fluid dynamics (CFD), and the lift and drag coefficients are calculated for several different drill pipe rotational velocities and ocean current velocities. A series of model experiments were conducted in a towing tank, with changing water flow velocities and rotational speed of the drill pipe model to observe the corresponding changes in the Magnus effect and to measure the resulting drill pipe motions. Additionally, the resulting drag and lift forces were measured. It was observed from the experiments that the motions in the cross-flow direction increased as the rotational speed of the drill pipe model increased, and that the lifting force increased as the rotational speed increased. The drill pipe motions were then simulated using a previously established analytical model and the results of the CFD simulations. The results of the simulations were evaluated against the results of the experiments, and reasons for observed discrepancies are discussed.
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Ochonogor, Chukwuma, Isah Madawaki, Ali Anaturk, André Eijk, Erik Slis, and Harm Schoonewille. "Vibration Survey of Topsides Piping on a Producing FPSO in the Gulf of Guinea." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83735.

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Visible mechanical vibrations were noticed on two topsides piping systems on a producing FPSO, in the Gulf of Guinea following increased production in 2008 and 2009. A field survey was undertaken on the piping of the FPSO to investigate the actual pulsation and vibration levels followed by a computer analysis to investigate if fatigue failure, caused by the actual vibrations as measured, would occur. Vibration data was collected from subsea jumpers, risers and topsides piping to ensure full coverage of the flow line systems from the wellhead to production manifolds on the topsides. The objectives of the study were to: determine the root cause of the vibrations, ascertain the vibration levels, predict fatigue occurrence and reduce vibration to acceptable levels. The study revealed that the maximum vibrations levels were caused as a result of an excitation of several mechanical natural frequencies by a broadband excitation as a result of the multiphase flow. The measured vibration levels exceeded the allowable levels in some points of the pipe system which was caused by a very flexible supporting layout. The results of the analysis showed that fatigue failure of the main piping would not occur. However, to avoid failure of small branch connections (e.g. pressure and temperature transmitters) and valves, modifications e.g. additional supports and stiffening of structural steel members, have been advised to achieve acceptable vibration levels to ensure a safe and reliable system in the long term. The measurements, data processing, analysis results and recommendations are discussed in detail.
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Pereira, Paulo S. D., Katsuya Maeda, Celso K. Morooka, Kenkichi Tamura, and Kazuaki Itoh. "Experimental Study on a Self Standing Hybrid Riser System Throughout Tests on a Deep-Sea Model Basin." In ASME 2005 24th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2005. http://dx.doi.org/10.1115/omae2005-67558.

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The present paper introduces a concept of a hybrid riser, Self Standing Hybrid Riser (SSHR), particularly in development for ultra deepwater around 3000 meters. Main problems faced in the initial definitions for design of such risers in the described scenario are discussed. Unique laboratory test with reduced model carried out in waves, current and riser top oscillation experiments in a very deepwater wave tank is shown. And, experimental results are shown and discussed, especially considering difficulties faced to carry out this experiment. Discussions are addressed in terms of vortex induced vibration (VIV) around buoyancy can, riser line pipe and flexible jumper.
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Durali, Mohammad, Amir Fazeli, and Ali Nabi. "Investigation of Dynamics and Vibration of PIG in Oil and Gas Pipelines." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43301.

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In this paper, the transient motion of an intelligent Pipe Inspection Gauge (PIG) while moving across anomalies inside a typical gas/oil pipeline has been investigated. The pipeline fluid has been considered as isothermal and compressible. In addition, the pipeline itself has also been considered to be flexible. The fluid continuity and momentum equations along with the 3D dynamic equations of motion of the pig comprise a system of coupled dynamic differential equations which have been solved numerically. Pig’s position, orientation and velocity profiles as well as upstream and downstream fluid’s pressure waves are presented as simulation results which provide a better understanding of the complex behavior of pig motion through pipelines. This study has been conducted as a part of the design procedure for the Pig which is currently under construction.
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Gaucher-Petitdemange, Matthias, Ya Wang, Masoud Masoumi, and Daniel J. Inman. "Vascular Fluid Damping of Flexible Multifunctional Composite Cantilevers: Experiment, Modeling and Analysis." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34506.

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Passive structural damping treatments based on viscoelastic polymers of elastomers are widely used in practice and have been the focus of numerous research studies and papers. Here we examine a multifunctional structure with vascular channels and investigate how the fluid in the channels provides damping to the system. While the vibration and stability of flow through a pipe has been extensively examined, internal fluid induced passive damping has not been well investigated in literature. Motivated by research in using vascular channels to provide self-cooling and autonomous healing of multifunctional composites, here we investigate the material and mechanical parameter dependence effects of internal fluid damping using an experimental study, modeling and numerical analysis of the dynamics of flexible cantilever beam conveying three types of internal vascular fluid flows.
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Durali, Mohammad, Amir Fazeli, and Mohsen Azimi. "Investigation of Dynamics and Vibration of a Three Unit PIG in Oil and Gas Pipelines." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67718.

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In this paper, the transient motion of a three unit intelligent Pipe Inspection Gauge (PIG) while moving across anomalies and bends inside gas/oil pipeline has been investigated. The pipeline fluid has been considered as isothermal and compressible. In addition, the pipeline itself has also been considered to be flexible. The fluid continuity and momentum equations along with the 3D multi body dynamic equations of motion of the pig comprise a system of coupled dynamic differential equations which have been solved numerically. Pig’s position and velocity profiles as well as upstream and downstream fluid’s pressure waves are presented as simulation results which provide a better understanding of the complex behavior of pig motion through pipelines. This study has been conducted as a part of the design procedure for the Pig which is currently under construction.
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10

Kudriavtsev, Vladimir, Satoyuki Kawano, T. Isoyama, H. Arai, T. Yambe, Y. Abe, K. Imachi, S. Nitta, and H. Hashimoto. "Numerical Study on Fluid-Structure Interaction in VFP Artificial Heart With Jelly-Fish Valve." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45114.

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We analyze sinusoidal pulsating flow that develops in the vibrating flow pump (VFP) artificial heart casing. In such system flow is induced by the axial movements of the vibrating pipe. Pipe is capped with the flexible thin disk that is called jelly-fish valve (JFV). Valve is opened during the downward pipe motion and is closed during the upward motion. Valve movement is very similar with the movement of falcon wings. It is due to the pipe motion and happens under the influence of fluid inertial, JFV spring, fluid shear and pressure forces. Authors utilized industrial strength CFD-ACE+/FEMSTRESS software package from CFDRC to analyze dynamic fluid-structure interaction, flow velocity field and time-dependent vorticity distribution. It was shown in the previous studies that blood hemolysis is closely correlated with the maximum values of vorticity fianction ω. In the paper we analyzed valve deformation, related flowfield and vorticity at different transient flow conditions. We can clearly conclude that dynamic formulation allows us to estimate and pinpoint with much greater accuracy the local maxima in vorticity. Vorticity peaks in two areas. First zone is at valve/pipe throat and second zone is at the casing throat. Vorticity is highest at the casing wall, thus pointing the direction for design improvements. Reduction in JFV stiffness helps to open valve wider and to reduce flow vorticity in its vicinity. These are work-in-progress results and additional studies will follow.
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