Academic literature on the topic 'Pipe whip'

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Journal articles on the topic "Pipe whip"

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Reid, S. R., and J. L. Yang. "Non-linear dynamic analysis of cantilever whipping pipes." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 212, no. 3 (1998): 133–49. http://dx.doi.org/10.1243/0954408981529367.

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This paper presents the results of numerical dynamic analyses of a number of pipe whip problems based on non-linear shell theory using the DYNA3D (version 6.0) finite element code. The calculations are mainly concerned with the transient deformation of the pipes during the whipping process. The main purpose of the study is to check the efficacy of a recently published theoretical elastic-plastic, hardening-softening (e-p-h-s) model for pipe whip developed by Reid et al. [1, 2]. This model is based upon beam theory but allows for the effects of ovalization of the pipe cross-section on the momen
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Reid, S. R., and J. L. Yang. "Pipe Whip: In-Plane Whipping of Bent Cantilever Pipes." Journal of Pressure Vessel Technology 120, no. 2 (1998): 170–78. http://dx.doi.org/10.1115/1.2842236.

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The dynamic elastic-plastic behavior of a bent cantilever pipe subjected to an in-plane force pulse at its tip is described. A theoretical model based on a large deflection formulation of dynamic beam theory is described. This takes into account the plastic hardening-softening behavior which is characteristic of a pipe when it is subjected to large changes in curvature. This beam model was first formulated and applied by Reid et al. (1995b, 1996), who demonstrated that it was able to describe quite accurately the characteristics of freely whipping, straight cantilever pipes. The present paper
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Peek, R. "Pipe Whip—Bounding the Required Restraint Capacity." Journal of Pressure Vessel Technology 107, no. 4 (1985): 356–60. http://dx.doi.org/10.1115/1.3264465.

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Energy balance methods commonly in use for the design of pipe whip restraints are based on the solution for the motion of a rigid-plastic pipe before impact against the restraint, with the assumption that after impact, the whipping portion of the pipe continues to rotate about the plastic hinge location determined for conditions before impact. Such energy balance methods are not necessarily conservative because: 1) the plastic hinge which forms in the pipe moves after impact on the restraint; and 2) elastic pipe deformations are not considered. Here, upper and lower bounds to the required rest
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Dundulis, Gintautas, Robertas Alzbutas, Ronald F. Kulak, and Paul V. Marchertas. "Reliability analysis of pipe whip impacts." Nuclear Engineering and Design 235, no. 17-19 (2005): 1897–908. http://dx.doi.org/10.1016/j.nucengdes.2005.05.007.

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Yano, T., N. Miyazaki, and S. Miyazono. "Evaluation and Prediction of Critical Overhang Length Under Pipe Whip Accident." Journal of Pressure Vessel Technology 108, no. 2 (1986): 182–87. http://dx.doi.org/10.1115/1.3264767.

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When the pipe length between break exit and restraint is long in the pipe whip accident, the pipe will undergo a plastic collapse as the moment increases. The length at which plastic collapse may occur is called the critical overhang length, (OH)cr. The experimental results of (OH)cr show good agreement with the prediction by a static simplified estimation method for (OH)cr although the pipe whipping is a dynamic phenomenon. The diagrams of (OH)cr are also described for a range of sizes of stainless steel pipe under the loss of coolant accident conditions of light water reactors.
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Ueda, Shuzo. "Moment-rotation relationship considering flattening of pipe due to pipe whip loading." Nuclear Engineering and Design 85, no. 2 (1985): 251–59. http://dx.doi.org/10.1016/0029-5493(85)90290-0.

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Baum, M. R. "Pipe whip: A summary of the damage observed in BNL pipe-on-pipe impact tests." International Journal of Pressure Vessels and Piping 30, no. 3 (1987): 217–32. http://dx.doi.org/10.1016/0308-0161(87)90044-5.

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Reid, S. R., B. Wang, and M. Aleyaasin. "Structural modelling and testing of failed high energy pipe runs: 2D and 3D pipe whip." International Journal of Pressure Vessels and Piping 88, no. 5-7 (2011): 189–97. http://dx.doi.org/10.1016/j.ijpvp.2011.05.006.

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Prinja, N. K., and N. R. Chitkara. "Large rotation, large strain analysis of pipe whip with flow choking." Nuclear Engineering and Design 93, no. 1 (1986): 69–81. http://dx.doi.org/10.1016/0029-5493(86)90195-0.

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Liu, Feng, Yuchao Yang, and Yuelei Wu. "The Characteristic Transient Response of a Pressurized Cantilever Pipe Subjected to Transverse Impact at Its Tip." Shock and Vibration 2019 (May 22, 2019): 1–15. http://dx.doi.org/10.1155/2019/4030379.

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This paper describes an experimental study on the pure bending mechanical behavior of a pressurized pipe and adoption of a measured moment-curvature relationship under different working conditions in numerical simulations for transient pipe-whip prediction. To describe the effects of pipe contents and internal pressure, the governing equations were derived based on large deformation theory. Bending moment and axial force were uncoupled in the constitutive equation, and an experiment-based relationship between moment and curvature was adopted. The numerical simulations show that the present mod
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Dissertations / Theses on the topic "Pipe whip"

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Prinja, N. K. "The mechanics of pipe whip." Thesis, University of Manchester, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325280.

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Wang, B. "Response of two-dimensional piping systems during pipe whip." Thesis, University of Manchester, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.701868.

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Pieters, Alfred Cornelius. "Whip restraint for a steam pipe rupture event on a nuclear power plant / Alfred Cornelius Pieters." Thesis, North-West University, 2013. http://hdl.handle.net/10394/9391.

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One of the requirements of a safe nuclear power plant design is the postulation of the dynamic effects of a steam pipe rupture. The dynamic effects are the discharging fluid and pipe whip on structures, systems or components. A pipe rupture can be caused in the steam pipe system where a defect such as a crack exists. Multiple factors contribute to the initiation of pipe cracks during the plant’s life. Cracks may start microscopically small and over time, with the assistance of cyclic operation, fatigue may elongate the crack. When a steam pipe is cooled by water during an accident, steam
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Mohammad, Roslina. "Impact loading and transient response of pipes transporting gas or liquid." Thesis, 2011. http://hdl.handle.net/2440/95628.

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This thesis focuses on the investigation of the effect of flowing medium on the transient response of a pipe due to dynamically applied loading. The topic is very important in many industrial and military applications including offshore structures, oil and gas, power stations, petrochemical and defence industries where critical pipe components transporting a gas or liquid can be subjected to impact loading due to an accident. In many previous studies, such effects were largely ignored, simplified or considered negligible. The conducted study demonstrated that in many practically important case
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Garlapow, Ross M. "Whip-poor-will Prey Availability and Foraging Habitat: Implications for Management in Pitch Pine / Scrub Oak Barrens Habitats." 2007. https://scholarworks.umass.edu/theses/27.

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Recently, the Whip-poor-will (Caprimulgus vociferous) has become focus of considerable conservation concerns as the result of evidence indicating significant population declines throughout its breeding range (Veit and Petersen 1993). The lack of quantitative data concerning much of this species natural history has delayed recovery efforts and is a fundamental shortcoming in forming effective conservation strategies. Current surveys show Pitch Pine (Pinus rigida) / Scrub Oak (Quercus illicifolia) Barrens (PPSO) as habitat with high numbers of Whip-poor-wills relative to other forest types found
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Books on the topic "Pipe whip"

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

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Merwin, Samuel. The Whip Hand: A Tale Of The Pine Country. Kessinger Publishing, LLC, 2007.

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Merwin, Samuel. The Whip Hand: A Tale Of The Pine Country. Kessinger Publishing, LLC, 2007.

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Book chapters on the topic "Pipe whip"

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Alderlieste, E. A., and M. J. Dekker. "Suction Pile Design and Installation Challenges for the Ophir WHP." In Lecture Notes in Civil Engineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2306-5_45.

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"Emerging Whig Partisan." In A Life of Albert Pike. University of Arkansas Press, 1997. http://dx.doi.org/10.2307/j.ctv18bv9rp.10.

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Conference papers on the topic "Pipe whip"

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Luo, Xiao, Wenjing Du, Chunlin Wang, et al. "Experimental Study of U-Bolt Pipe Whip Restraint: Deformation Process and Energy Absorbing." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50848.

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This paper focuses on the U-bolt pipe whip restraint in the industrial plants, which is used to protect the equipment and prevent chain destruction under the circumstance that the pipe whip phenomenon occurs. And to achieve better protection performance the deformation process and energy absorbing situations are studied through experiments. The experiments are able to simulate the whipping pipe impacting the U-bolt pipe whip restraint with different velocity and input energy. This study presents a novel experiment method using a rigid sled to impact the U-bolt pipe whip restraint. This horizon
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Hamamoto, Yukari, and Makoto Toyoda. "Pipe Rupture Analysis Considering Fluid-Structure Interaction." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57534.

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Global warming is caused by the emission of greenhouse gases, like CO2. Nuclear energy is one of the main sources of low-carbon energy. In the events of serious accidents, a nuclear power plant may emit radioactivity that is harmful to human health. Nuclear power should be used after enough evidence of its safety is provided. Measures for safety of nuclear power plants, such as autogenous control and LBB, have been developed. Moreover, there is requirement with respect to the design, safety, equipments components and systems of nuclear plant. For example, it is necessary to place components th
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He, Feng, Feng Yuan, Honglei Ai, Xinjun Wang, Xifeng Lu, and Yongbo Lv. "Technology of Protection Against the Dynamic Effect of Nuclear Pipe Rupture." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66381.

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The special safety facilities and important equipment, etc. of the nuclear power plant will be damaged due to the whipping nuclear high-energy piping after the rupture, and more serious further damage will be caused. In this paper, the process and method of protection analysis of the nuclear high-energy piping rupture have been given from four aspects. The four aspects are location of high-energy piping break, the jet thrust, whipping behavior analysis, and protection analysis of whipping. On the basis of the traditional energy balance method, the method is improved by considering the energy a
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Hurst, Antony M., and Pavitra Bansal. "Using Pipe Whip Analysis via the Finite Element Method to Underpin the Delineation Between High and Moderate Energy Lines." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16474.

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Abstract When a pressurised pipe in a reactor coolant system breaks, it results in hydraulic loads on the reactor containment system and escaping fluid exerts a thrust force on the pipe. The double-ended guillotine break (DEGB) is generally the most onerous loss of coolant accident (LOCA) in design of a reactor coolant system [1]. In addition to the hydraulic loads, the continuing thrust force on the broken end of the pipe generates a rapidly accelerating rotational displacement of the pipe section on the break side of the plastic hinge, the phenomenon called pipe whip. The whipping pipe has t
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Qin, Manqing, Xinghua Li, and Jicheng Zhao. "Analysis of Dynamic Effects Associated With Postulated Breaks of Piping." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-15273.

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High energy pipe break hypothesis and engineering practice shall be taken into account and performed during nuclear power plant design due to defense-in-depth concept unless leak-before-break or break preclusion concept is applied. High energy pipe breaks potentially occur in the high stress area and break locations can be recognized by specific regulations based on mechanical analysis of piping systems. Engineering measures shall be applied to mitigate the consequences caused by high energy pipe breaks later. From engineering point of view High Energy Line Break analysis requires an essential
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Vongmongkol, Sivadol, Asgar Faal-Amiri, and Hari M. Srivastava. "Determination of Pipe Whip Restraint Location to Prevent Plastic Hinge Formation in High Energy Piping Systems." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57370.

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The purpose of this study is to determine the Pipe Whip Restraint (PWR) location that would prevent the formation of a plastic hinge due to secondary effects of a postulated pipe break load in a high energy line(1). The prevention of a plastic hinge formation at the PWR location is important since its secondary effects could lead to additional interactions with safety related equipment, structure, and component that are essential to safely shutdown the nuclear power plants. The proper location of the PWR can be found by using the relationship between bending moment-carrying capacity of the pip
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Gray, John H., Vijay K. Verma, and Maury A. Pressburger. "Load Limiting Gapped Strut and New Generation Whip Restraint." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25147.

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Load Limiting Gapped Struts (LLGS’s) can be used to reduce the number of snubbers required for seismic protection. However, it is the LLGS’s ability to absorb energy that makes it unique, and ideal for use as a restraint for infrequent dynamic loads, such as water hammer and pipe whip. LLGS’s can be designed to yield at a predetermined limit load. For example, E-BARs (a type of LLGS) absorb energy through plastic deformation of the outer metal housing. This controls pipe displacements and stresses to acceptable values while limiting loads transferred to the structure. By using LLGS’s as a “fus
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Liszkai, Tama´s R. "Mechanical Collateral Damage Assessment of Reactor Vessel Bottom Mounted Nozzles: Part I—Requirements and Methodology." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57804.

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A comprehensive work scope including the engineering safety assessments, Non-Destructive Examination (NDE) and repair design, is developed by AREVA NP Inc. for the Reactor Vessel (RV) Incore Monitoring Instrument (IMI) nozzles. The joint Bottom Mounted Nozzle (BMN) Assessment Plan is coordinated under the Electric Power Research Institute (EPRI) Materials Reliability Program (MRP). The purpose of such coordination is to produce a safety assessment of consistent scope and methodology to address the different IMI nozzle designs in all U.S. Pressurized Water Reactors (PWRs). The IMI nozzles, whic
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Liszkai, Tama´s R. "Mechanical Collateral Damage Assessment of Reactor Vessel Bottom Mounted Nozzles: Part II—Analysis and Applications." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57805.

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A comprehensive work scope including the engineering safety assessments, Non-Destructive Examination (NDE) and repair design, is developed by AREVA NP Inc. for the Reactor Vessel (RV) Incore Monitoring Instrument (IMI) nozzles. The joint Bottom Mounted Nozzle (BMN) Assessment Plan is coordinated under the Electric Power Research Institute (EPRI) Materials Reliability Program (MRP). The purpose of such coordination is to produce a safety assessment of consistent scope and methodology to address the different IMI nozzle designs in all U.S. Pressurized Water Reactors (PWRs). The IMI nozzles, whic
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Dundulis, Gintautas, Ronald F. Kulak, Algirdas Marchertas, Evaldas Narvydas, Mark C. Petry, and Eugenijus Uspuras. "Evaluation of Pipe Whip Impacts on Neighboring Piping and Walls of the Ignalina Nuclear Power Plant." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22469.

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Presented in this paper is the transient analysis of a Group Distribution Header (GDH) following a guillotine break at the end of the header. The GDH is the most important component of reactor safety in case of accidents. Emergency Core Cooling System (ECCS) piping is connected to the GDH piping such that, during an accident, coolant passes from the GDH into the ECCS. The GDH that is propelled into motion after a guillotine break can impact neighboring GDH pipes or the nearest wall of the compartment. Therefore, two cases are investigated: • GDH impact on an adjacent GDH and its attached pipin
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Reports on the topic "Pipe whip"

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Logger killed as skyline cable whips free of slash pile. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 2003. http://dx.doi.org/10.26616/nioshsface03or007.

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