Academic literature on the topic 'Planets - Internal structure'

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Journal articles on the topic "Planets - Internal structure"

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Valencia, Diana, Richard J. O'Connell, and Dimitar Sasselov. "Internal structure of massive terrestrial planets." Icarus 181, no. 2 (2006): 545–54. http://dx.doi.org/10.1016/j.icarus.2005.11.021.

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Nixon, Matthew C., and Nikku Madhusudhan. "How deep is the ocean? Exploring the phase structure of water-rich sub-Neptunes." Monthly Notices of the Royal Astronomical Society 505, no. 3 (2021): 3414–32. http://dx.doi.org/10.1093/mnras/stab1500.

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ABSTRACT Understanding the internal structures of planets with a large H2O component is important for the characterization of sub-Neptune planets. The finding that the mini-Neptune K2-18b could host a liquid water ocean beneath a mostly hydrogen envelope motivates a detailed examination of the phase structures of water-rich planets. To this end, we present new internal structure models for super-Earths and mini-Neptunes that enable detailed characterization of a planet’s water component. We use our models to explore the possible phase structures of water worlds and find that a diverse range of
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Alibert, Y., and J. Venturini. "Using deep neural networks to compute the mass of forming planets." Astronomy & Astrophysics 626 (June 2019): A21. http://dx.doi.org/10.1051/0004-6361/201834942.

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Context. Computing the mass of planetary envelopes and the critical mass beyond which planets accrete gas in a runaway fashion is important for studying planet formation, in particular, for planets up to the Neptune-mass range. This computation in principle requires solving a set of differential equations, the internal structure equations, for some boundary conditions (pressure, temperature in the protoplanetary disc where a planet forms, core mass, and the rate of accretion of solids by the planet). Solving these equations in turn proves to be time-consuming and sometimes numerically unstable
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Kramm, Ulrike, Nadine Nettelmann, and Ronald Redmer. "Constraining planetary interiors with the Love number k2." Proceedings of the International Astronomical Union 6, S276 (2010): 482–84. http://dx.doi.org/10.1017/s1743921311020898.

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AbstractFor the solar sytem giant planets the measurement of the gravitational moments J2 and J4 provided valuable information about the interior structure. However, for extrasolar planets the gravitational moments are not accessible. Nevertheless, an additional constraint for extrasolar planets can be obtained from the tidal Love number k2, which, to first order, is equivalent to J2. k2 quantifies the quadrupolic gravity field deformation at the surface of the planet in response to an external perturbing body and depends solely on the planet's internal density distribution. On the other hand,
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Costa, Maria M., Ninna K. Jensen, Laura C. Bouvier, et al. "The internal structure and geodynamics of Mars inferred from a 4.2-Gyr zircon record." Proceedings of the National Academy of Sciences 117, no. 49 (2020): 30973–79. http://dx.doi.org/10.1073/pnas.2016326117.

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Combining U–Pb ages with Lu–Hf data in zircon provides insights into the magmatic history of rocky planets. The Northwest Africa (NWA) 7034/7533 meteorites are samples of the southern highlands of Mars containing zircon with ages as old as 4476.3 ± 0.9 Ma, interpreted to reflect reworking of the primordial Martian crust by impacts. We extracted a statistically significant zircon population (n= 57) from NWA 7533 that defines a temporal record spanning 4.2 Gyr. Ancient zircons record ages from 4485.5 ± 2.2 Ma to 4331.0 ± 1.4 Ma, defining a bimodal distribution with groupings at 4474 ± 10 Ma and
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Brügger, N., Y. Alibert, S. Ataiee, and W. Benz. "Metallicity effect and planet mass function in pebble-based planet formation models." Astronomy & Astrophysics 619 (November 2018): A174. http://dx.doi.org/10.1051/0004-6361/201833347.

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Context. One of the main scenarios of planet formation is the core accretion model where a massive core forms first and then accretes a gaseous envelope. This core forms by accreting solids, either planetesimals or pebbles. A key constraint in this model is that the accretion of gas must proceed before the dissipation of the gas disc. Classical planetesimal accretion scenarios predict that the time needed to form a giant planet’s core is much longer than the time needed to dissipate the disc. This difficulty led to the development of another accretion scenario, in which cores grow by accretion
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Bolmont, E., S. N. Breton, G. Tobie, C. Dumoulin, S. Mathis, and O. Grasset. "Solid tidal friction in multi-layer planets: Application to Earth, Venus, a Super Earth and the TRAPPIST-1 planets." Astronomy & Astrophysics 644 (December 2020): A165. http://dx.doi.org/10.1051/0004-6361/202038204.

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With the discovery of TRAPPIST-1 and its seven planets residing within 0.06 au, it is becoming increasingly necessary to carry out correct treatments of tidal interactions. The eccentricity, rotation, and obliquity of the planets of TRAPPIST-1 do indeed result from the tidal evolution over the lifetime of the system. Tidal interactions can also lead to tidal heating in the interior of the planets (as for Io), which may then be responsible for volcanism or surface deformation. In the majority of studies aimed at estimating the rotation of close-in planets or their tidal heating, the planets are
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Cayrel de Strobel, G. "Physical Parameters of 59 Stars with Planets." Symposium - International Astronomical Union 219 (2004): 395–99. http://dx.doi.org/10.1017/s0074180900182385.

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Astrometric, kinematic, spectroscopic and internal stellar structure data of 59 out of 102, extra-solar planet stars (thereafter ESPs), as yet discovered, are herewith discussed. The remaining 43 have been discarded, because they are not yet subjected to detailed spectroscopic analyses. The assembling of true physical parameters of ESPs has been made with the help of the Hipparcos and the [Fe/H] Catalogues. The retained 59 ESPs, could be divided into three sub-samples: midly metal poor, metal normal and metal enriched ESPs. Three observational (logTeff, Mbol) diagrams for each of the metallici
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Helled, Ravit, and Jonathan J. Fortney. "The interiors of Uranus and Neptune: current understanding and open questions." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2187 (2020): 20190474. http://dx.doi.org/10.1098/rsta.2019.0474.

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Uranus and Neptune form a distinct class of planets in our Solar System. Given this fact, and ubiquity of similar-mass planets in other planetary systems, it is essential to understand their interior structure and composition. However, there are more open questions regarding these planets than answers. In this review, we concentrate on the things we do not know about the interiors of Uranus and Neptune with a focus on why the planets may be different, rather than the same. We next summarize the knowledge about the planets’ internal structure and evolution. Finally, we identify the topics that
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Zhang, Keke, Dali Kong, and Gerald Schubert. "Shape, Internal Structure, Zonal Winds, and Gravitational Field of Rapidly Rotating Jupiter-Like Planets." Annual Review of Earth and Planetary Sciences 45, no. 1 (2017): 419–46. http://dx.doi.org/10.1146/annurev-earth-063016-020305.

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Dissertations / Theses on the topic "Planets - Internal structure"

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Debras, Florian. "Inner structure and atmospheric dynamics of gaseous giant planets." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEN085/document.

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Lors de cette thèse, je me suis attaché à améliorer notre connaissance des planètes géantes, depuis notre voisine Jupiter jusqu’aux exoplanètes lointaines : les Jupiter chauds. Grâce aux nouvelles observations gravitationnelles extrêmement fines du satellite Juno, entré en orbite autour de Jupiter en juillet 2016, il est possible d’améliorer significativement les modèles de structure interne de la planète. Cependant, cela ne peut se faire qu’à condition d’avoir une méthode suffisamment précise pour exploiter au maximum les données. J’ai donc étudié la méthode des sphéroide
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Komacek, Thaddeus D., and Andrew N. Youdin. "Structure and Evolution of Internally Heated Hot Jupiters." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625158.

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Hot Jupiters receive strong stellar irradiation, producing equilibrium temperatures of 1000-2500 K. Incoming irradiation directly heats just their thin outer layer, down to pressures of similar to 0.1 bars. In standard irradiated evolution models of hot Jupiters, predicted transit radii are too small. Previous studies have shown that deeper heating-at a small fraction of the heating rate from irradiation-can explain observed radii. Here we present a suite of evolution models for HD 209458b, where we systematically vary both the depth and intensity of internal heating, without specifying the un
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Pauer, Martin. "Přímé a inverzní modelování topografie a gravitačního pole planet." Doctoral thesis, 2013. http://www.nusl.cz/ntk/nusl-327435.

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Title: Forward and Inverse Modeling of Planetary Gravity and Topography Author: Martin Pauer Department/Institute: Department of Geophysics MFF UK Supervisor of the doctoral thesis: Doc. RNDr. Ondřej Čadek, CSc., Department of Geophysics MFF UK Abstract: The aim of this work was to investigate various mechanisms compensating the observed planetary topography - crustal isostasy, elastic support and dynamic support caused by mantle flow. The investigated models were applied to three different planetary problems. Firstly we applied dynamic compensation model to explain today large-scale gravity a
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Books on the topic "Planets - Internal structure"

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Interior structure of the earth and planets. Harwood Academic Publishers, 1986.

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Orlenok, Vi︠a︡cheslav Vladimirovich. Global volcanism and oceanization of the Earth and planets. I.Kant State University of Russia Press, 2011.

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Szaniszló, Bérczi. Kristályoktól bolygótestekig. Akadémiai Kiadó, 1991.

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Brown, G. C. The inaccessible earth: An integrated view to its structue and composition. 2nd ed. Chapman & Hall, 1993.

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The dynamic structure of the deep Earth: An interdisciplinary approach. Princeton University Press, 2003.

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Meshcheri͡akov, G. A. Gravitat͡sionnoe pole, figura i vnutrennee stroenie Marsa. Nauk. dumka, 1987.

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A trip to the center of the Earth. Gareth Stevens Publishing, 2015.

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Viaje al centro de la tierra. Gareth Stevens Publishing, 2015.

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What's inside earth? PowerKids Press, 1999.

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Romashov, Aleksandr Nikolaevich. Planeta Zemli︠a︡: Tektonofizika i ėvoli︠u︡t︠s︡ii︠a︡. URSS, 2003.

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Book chapters on the topic "Planets - Internal structure"

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Zuber, Maria T., Harry Y. McSween, Richard P. Binzel, et al. "Origin, Internal Structure and Evolution of 4 Vesta." In The Dawn Mission to Minor Planets 4 Vesta and 1 Ceres. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4614-4903-4_6.

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Helled, Ravit, and Tristan Guillot. "Internal Structure of Giant and Icy Planets: Importance of Heavy Elements and Mixing." In Handbook of Exoplanets. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-30648-3_44-1.

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Helled, Ravit, and Tristan Guillot. "Internal Structure of Giant and Icy Planets: Importance of Heavy Elements and Mixing." In Handbook of Exoplanets. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-30648-3_44-2.

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Helled, Ravit, and Tristan Guillot. "Internal Structure of Giant and Icy Planets: Importance of Heavy Elements and Mixing." In Handbook of Exoplanets. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-30648-3_44-3.

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Helled, Ravit, and Tristan Guillot. "Internal Structure of Giant and Icy Planets: Importance of Heavy Elements and Mixing." In Handbook of Exoplanets. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-55333-7_44.

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Chujkova, N. A., L. P. Nasonova, and T. G. Maximova. "The New Method to Find the Anomalous Internal Structure of Terrestrial Planets and Its Test on the Earth." In International Association of Geodesy Symposia. Springer International Publishing, 2015. http://dx.doi.org/10.1007/1345_2015_195.

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Raith, Chiara, Manuel Woschank, and Helmut Zsifkovits. "Automated Performance Measurement in Internal Logistics Systems." In Implementing Industry 4.0 in SMEs. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70516-9_7.

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AbstractIn addition to economic and on-time order fulfillment, the monitoring of the plant performance and its related key performance indicators is a central task of logistics management and control systems. Currently, the determination and calculation of performance figures within the framework of site acceptance tests of automated logistics systems are plant-specific and, therefore, require a lot of manual effort. In this chapter, the authors develop a concept for the automated determination of performance indicators for storage and conveying systems. Based on a comprehensive literature review, structured expert interviews and including various perspectives from industrial applications the approach is designed. Further, the impact of the proposed concept on the logistics performance of the plant and the adequate selection of a maintenance strategy is discussed.
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Zolnikov, Konstantin P., Dmitrij S. Kryzhevich, and Aleksandr V. Korchuganov. "Regularities of Structural Rearrangements in Single- and Bicrystals Near the Contact Zone." In Springer Tracts in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_14.

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AbstractThe chapter is devoted to the analysis of the features of local structural rearrangementsin nanostructured materialsunder shear loadingand nanoindentation. The study was carried out using molecular dynamics-based computer simulation. In particular, we investigated the features of symmetric tilt grain boundary migration in bcc and fcc metals under shear loading. The main emphasis was on identifying atomic mechanisms responsible for the migration of symmetric tilt grain boundaries. We revealed that grain boundaries of this type can move with abnormally high velocities up to several hundred meters per second. The grain boundary velocity depends on the shear rate and grain boundary structure. It is important to note that the migration of grain boundary does not lead to the formation of structural defects. We showed that grain boundary moves in a pronounced jump-like manner as a result of a certain sequence of self-consistent displacements of grain boundary atomic planes and adjacent planes. The number of atomic planes involved in the migration process depends on the structure of the grain boundary. In the case of bcc vanadium, five planes participate in the migration of the Σ5(210)[001] grain boundary, and three planes determine the Σ5(310)[001] grain boundary motion. The Σ5(310)[001] grain boundary in fcc nickel moves as a result of rearrangements of six atomic planes. The stacking order of atomic planes participating in the grain boundary migration can change. A jump-like manner of grain boundary motion may be divided into two stages. The first stage is a long time interval of stress increase during shear loading. The grain boundary is motionless during this period and accumulates elastic strain energy. This is followed by the stage of jump-like grain boundary motion, which results in rapid stress drop. The related study was focused on understanding the atomic rearrangements responsible for the nucleation of plasticity near different crystallographic surfaces of fcc and bcc metals under nanoindentation. We showed that a wedge-shaped region, which consists of atoms with a changed symmetry of the nearest environment, is formed under the indentation of the (001) surface of the copper crystallite. Stacking faults arise in the (111) atomic planes of the contact zone under the indentation of the (011) surface. Their escape on the side free surface leads to a step formation. Indentation of the (111) surface is accompanied by nucleation of partial dislocations in the contact zone subsequent formation of nanotwins. The results of the nanoindentation of bcc iron bicrystal show that the grain boundary prevents the propagation of structural defects nucleated in the contact zone into the neighboring grain.
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Salama, Abd El-Aziz T. "The effect of soil salt content on the internal structure of Zygophyllum spp. in U.A.E." In Towards the rational use of high salinity tolerant plants. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1858-3_44.

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Delhaize, Emmanuel, Peter R. Ryan, Peter J. Hocking, and Alan E. Richardson. "Effects of altered citrate synthase and isocitrate dehydrogenase expression on internal citrate concentrations and citrate efflux from tobacco (Nicotiana tabacum L.) roots." In Structure and Functioning of Cluster Roots and Plant Responses to Phosphate Deficiency. Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0243-1_11.

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Conference papers on the topic "Planets - Internal structure"

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Heo, Yub, and Hong-Gye Sung. "Analytical Modeling of Internal Flow Structures in the Isolator of Scramjet Engines." In 21st AIAA International Space Planes and Hypersonics Technologies Conference. American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-2240.

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Moon, Kyoo Hwan, and Hong-Gye Sung. "Modeling of Internal Flow Structures in the Isolator of Scramjet Engines." In 20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference. American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-3526.

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Takakura, Kenichi, Shigeaki Tanaka, Tomomi Nakamura, Kazuhiro Chatani, and Yoshiyuki Kaji. "IASCC Evaluation Method for Irradiated Core Internal Structures in BWR Power Plants." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25293.

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Irradiation Assisted Stress Corrosion Cracking (IASCC) is a matter of great concern as a degradation of core internal components in light water nuclear reactor. Japan Nuclear Energy Safety organization (JNES) had been conducting a project related to IASCC as a part of safety research & development study for the aging management & maintenance of the nuclear power plants. Based on the JNES project results, JNES proposed “IASCC evaluation guide for BWR core internals”. The purpose of this paper is to describe the background of the guide, especially crack growth rate (CGR) tests for irradi
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Aquaro, D., M. D. Carelli, G. Forasassi, R. Lo Frano, and N. Zaccari. "Seismic Response of Reactor Vessel Internals in the IRIS Reactor." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89579.

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The intent of this paper is the presentation and discussion of a methodology for the evaluation and analysis of seismic loads effects on a nuclear power plant. To help in focussing the presented methodology, a preliminary simplified analysis of an integral, medium size next generation PWR reactor structure (IRIS project, an integral configuration PWR under study by an international group) was considered as an application example also for models/codes evaluation. The performed preliminary seismic analysis, even though by no means complete, is intended to evaluate the method of calculating the e
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Kikuchi, Masanori, Shinya Yamada, Ryosuke Serizawa, and Li Yulong. "Internal Crack Growth Simulation Using S-Version FEM." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28477.

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In nuclear power plant, there is a proximity rule to evaluate multiple inner cracks [1]. Inner cracks are generated inside of the structure in different manners. There are many parameters which affects the growing processes of inner cracks. They are; locations, slant angles, aspect ratio of each inner crack and distances between adjacent inner cracks. When multiple inner cracks are detected, proximity rules are proposed. But due to the complexity of the problem, it is necessary to verify proposed proximity rules. But experimental study is very difficult due to existence of many parameters, and
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Okuda, Yukihiko, Zuoyi Kang, Akemi Nishida, Haruji Tsubota, and Yinsheng Li. "Analytical Study on Dynamic Response of Reinforced Concrete Structure With Internal Equipment Subjected to Projectile Impact." 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/icone2020-16849.

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Abstract In case of a projectile impact on a reactor building of a nuclear power plant, stress waves propagate from the impacted wall to the structure’s interior. It is important to assess the effect of dynamic responses generated by the projectile’s impact on internal equipment, because stress waves are likely to excite high-frequency vibrations of internal equipment. The OECD (Organization for Economic Co-operation and Development) / NEA (Nuclear Energy Agency) launched the IRIS (Improving Robustness Assessment Methodologies for Structures Impacted by Projectiles) benchmark project in order
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Takahashi, Shiro, Kunio Hasegawa, and Tomomichi Nakamura. "Nuclear Power Plants Issues in IAEA Technical Guidelines on Fluid-Structure Interactions." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28476.

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This paper introduces nuclear power plant issues described in International Atomic Energy Agency (IAEA) technical guidelines on fluid-structure interactions (FSIs). The occurrence of FSIs has been recognized for a long time in industry. It is sometimes difficult to predict the FSI phenomena accurately, however, and FSI vibration and water hammer are concerns for structural design or trouble shooting. There have been many problems caused by FSIs in nuclear power plants. In order to avoid FSI problems for newly designed components, it is important to learn from past FSI events that have occurred
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Saricicek, I., Z. Ogretmen Aydin, and A. Seren. "Imaging of Internal Structure in Landing Fields of Planes at Erzincan Airport (Turkey) with GPR Method." In Near Surface Geoscience 2016 - 22nd European Meeting of Environmental and Engineering Geophysics. EAGE Publications BV, 2016. http://dx.doi.org/10.3997/2214-4609.201601984.

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Zhang, Zhenyang, Hongwei Ma, Chao Jin, Cheng Xue, and Yunlong Huang. "Application of PIV Measurements and Snapshot POD Analysis in a Cylinder Head of Diesel Engine." In ASME 2017 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icef2017-3511.

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The characteristic of coolant flow field in the water jacket of a cylinder head plays an important role in heat exchange, which could even influence the diesel engine’s performance and service life. Measurements and analysis methods to coolant flow field are limited by the complex internal geometrical structure of the cylinder head. In this paper, flow fields in a small and complicated spatial structure are measured by particle image velocimetry (PIV) system and the data are analyzed using proper orthogonal decomposition (POD) method. Time varying coolant flow structures located among two valv
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Ranganath, Sam, and Robert Carter. "Structural Capability of Austenitic Piping and Shells With Parallel Offset Cracks." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26688.

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Boiling water reactor (BWR) components made of austenitic stainless steel are exposed to the high temperature water environment. Under the combination of susceptible material condition (sensitization due to welding or cold work), weld residual stresses and the oxygenated high temperature water environment, reactor internals such as the core shroud and internal core spray piping experience stress corrosion cracking. The cracking is typically in the weld heat affected zone on both sides of the weld and is parallel to the weld direction. The determination of the structural capability of the compo
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