Academic literature on the topic 'Underwater explosions'

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Journal articles on the topic "Underwater explosions"

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Yu, Jun, Hai-tao Li, Zhen-xin Sheng, Yi Hao, and Jian-hu Liu. "Numerical research on the cavitation effect induced by underwater multi-point explosion near free surface." AIP Advances 13, no. 1 (January 1, 2023): 015021. http://dx.doi.org/10.1063/5.0136546.

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In this study, the cavitation effect induced by two charges in underwater explosions near free surfaces is numerical researched by two dimensional compressible multiphase fluids based on a four-equation system with a phase transition model. The occurrence of the generation, development, and collapse of cavitation in two-charge underwater explosions near free surfaces can be captured directly. The detailed density, pressure, and vapor volume fraction contours during the interaction process are obtained and can better reveal the characteristic underlying the cavitation, free surface, and explosion bubbles. Numerical results reveal that the cavitation domain has expanded to an area much deeper than the explosion bubble location in two-charge underwater explosions, which should be paid enough attention due to its influence on the input load of underwater structures. The detailed density and pressure contours during the interaction process can also be captured and can better reveal the mechanism underlying the explosion bubble, cavitation, and surface wave dynamics. The present results can expand the currently limited database of multiphase fluid in underwater explosions and also provide new insights into the strong nonlinear interaction between underwater explosion and cavitation, which provides a deep understanding of multi-point explosions.
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Zhang, Zhifan, Hailong Li, Longkan Wang, Guiyong Zhang, and Zhi Zong. "Formation of Shaped Charge Projectile in Air and Water." Materials 15, no. 21 (November 7, 2022): 7848. http://dx.doi.org/10.3390/ma15217848.

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With the improvement of the antiknock performance of warships, shaped charge warheads have been focused on and widely used to design underwater weapons. In order to cause efficient damage to warships, it is of great significance to study the formation of shaped charge projectiles in air and water. This paper uses Euler governing equations to establish numerical models of shaped charges subjected to air and underwater explosions. The formation and the movement of Explosively Formed Projectiles (EFPs) in different media for three cases: air explosion and underwater explosions with and without air cavities are discussed. First, the velocity distributions of EFPs in the formation process are discussed. Then, the empirical coefficient of the maximum head velocity of EFPs in air is obtained by simulations of air explosions of shaped charges with different types of explosives. The obtained results agree well with the practical solution, which validates the numerical model. Further, this empirical coefficient in water is deduced. After that, the evolutions of the head velocity of EFPs in different media for the above three cases are further compared and analyzed. The fitting formulas of velocity attenuation of EFPs, which form and move in different media, are gained. The obtained results can provide a theoretical basis and numerical support for the design of underwater weapons.
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Miralles, Ramón, Guillermo Lara, Alicia Carrión, and Manuel Bou-Cabo. "Assessment of Arrow-of-Time Metrics for the Characterization of Underwater Explosions." Sensors 21, no. 17 (September 4, 2021): 5952. http://dx.doi.org/10.3390/s21175952.

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Anthropogenic impulsive sound sources with high intensity are a threat to marine life and it is crucial to keep them under control to preserve the biodiversity of marine ecosystems. Underwater explosions are one of the representatives of these impulsive sound sources, and existing detection techniques are generally based on monitoring the pressure level as well as some frequency-related features. In this paper, we propose a complementary approach to the underwater explosion detection problem through assessing the arrow of time. The arrow of time of the pressure waves coming from underwater explosions conveys information about the complex characteristics of the nonlinear physical processes taking place as a consequence of the explosion to some extent. We present a thorough review of the characterization of arrows of time in time-series, and then provide specific details regarding their applications in passive acoustic monitoring. Visibility graph-based metrics, specifically the direct horizontal visibility graph of the instantaneous phase, have the best performance when assessing the arrow of time in real explosions compared to similar acoustic events of different kinds. The proposed technique has been validated in both simulations and real underwater explosions.
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Kiciński, Radosław, and Bogdan Szturomski. "Pressure Wave Caused by Trinitrotoluene (TNT) Underwater Explosion—Short Review." Applied Sciences 10, no. 10 (May 15, 2020): 3433. http://dx.doi.org/10.3390/app10103433.

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The development of computational techniques and computer hardware has an impact the analysis of short-term (fast-changing) processes, such as the impact of a non-contact underwater explosion pressure waves. A theory of underwater explosions, gas bubble formation and pressure waves are presented. The course of the pressure wave in time, and its propagation in the acoustic medium are presented. The study presents empirical descriptions of non-contact pressure explosion waves. We propose to use them in simulations of ship hull strength and other objects immersed in liquids that are exposed to the effects of non-contact trinitrotoluene (TNT)-charge explosions. Pressure distributions and their time courses given by authors such as R.H. Cole, J.S. Nawagin, W. Stiepanow, T.E. Farley and H.G. Snay, T.L. Geers and K.S. Hunter are compared. A method of pressure wave modeling using acoustic media implemented in Computer Aided Engineering (CAE) programs is presented. The results of the values and the time course of the pressure acting on the underwater object are given. The influence of FEM (Finite Element Method) mesh density on the obtained results is examined and presented. The aim of the article is to expand our knowledge of underwater explosions, compare mathematical descriptions of the pressure waves developed by different authors and show the differences between them. In addition, we present the distinction between contact and non-contact explosions and analyze how changes in the mesh density of acoustic elements affects the reflection of the incident wave caused by an underwater explosion.
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Wang, Yan, Xiaoming Wang, Zhehan Liu, Wei Tang, Jian Li, De Nan, and Shiya Zou. "Estimation on the Underwater Explosion Equivalent Based on the Threshold Monitoring Technique." Shock and Vibration 2021 (October 18, 2021): 1–8. http://dx.doi.org/10.1155/2021/1933744.

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Underwater nuclear explosions can be monitored in near real-time by the hydroacoustic network of the International Monitoring System (IMS) established by the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which could also be used to monitor underground and atmospheric nuclear explosions. The equivalent is an important parameter for the nuclear explosions’ monitoring. The traditional equivalent estimation method is to calculate the bubble pulsation period, which is difficult to obtain satisfactory results under the current conditions. In this paper, based on the passive sonar equation and the conversion process of acoustic energy parameters in the hydroacoustic station, the threshold monitoring technique used for underwater explosion equivalent estimation was studied, which was not limited to the measurement conditions and calculation results of the bubble pulsation period. Through the analysis of practical monitoring data, estimation on the underwater explosion equivalent based on the threshold monitoring technique was verified to be able to reach the accuracy upper boundary of current methods and expand the measurement range to further ocean space, along with the real-time monitoring capability of IMS hydroacoustic stations which could be estimated by this method.
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Itoh, S., Z. Liu, and Y. Nadamitsu. "An Investigation on the Properties of Underwater Shock Waves Generated in Underwater Explosions of High Explosives." Journal of Pressure Vessel Technology 119, no. 4 (November 1, 1997): 498–502. http://dx.doi.org/10.1115/1.2842336.

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A cylinder expansion test for high explosives was carried out to determine JWL parameters. Using the JWL parameters, we carried out numerical simulations of the underwater shock waves generated by the underwater explosion of the high explosives. Our results showed that the behavior of the underwater shock waves at the vicinity of the explosives differs greatly from that far from the explosives. Especially, the strength of the underwater shock wave nearby the explosive rapidly decreases due to the effect of the expansion of the gas products.
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Chen, Wenge, Lele Cheng, Chao Yu, Haijun Wu, Fenglei Hang, and Ziqi Wu. "Experimental Study on the Cumulative Damage of Shipboard Structure Subject to Near-field Underwater Explosions." Journal of Physics: Conference Series 2419, no. 1 (January 1, 2023): 012003. http://dx.doi.org/10.1088/1742-6596/2419/1/012003.

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Abstract To explore the cumulative damage law of near-field underwater explosions on the side of the ship structure, the multi-cabin model of the shipboard local structure is designed and applied to close-in underwater explosion experiments with different explosive masses and model conditions. The pressure load of the explosion shock wave near the water surface is obtained and analyzed. The damage results, such as the damage pattern of the model and the damage range of cabins, are acquired. The comprehensive comparison shows that: the secondary explosion on the side has a significant cumulative damage effect; the damage pattern of the structure is closely related to the proportional distance of the explosion. The damaged power of a single large charge explosion on the shipboard is bigger than the cumulative damage caused by two small explosions. The results of this study can provide a reference for the research on the damage and protection of the ship.
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Yu, Jun, Xianpi Zhang, Yanjie Zhao, Lunping Zhang, Jiping Chen, and Yuanqing Xu. "Study on the Influence of a Rigid Wall on Cavitation in Underwater Explosions Near the Free Surface." Applied Sciences 14, no. 5 (February 23, 2024): 1822. http://dx.doi.org/10.3390/app14051822.

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A two-fluid, phase transition-based multiphase flow model is employed to simulate the dynamics of phase transition between liquid and vapor phases during shock wave and rarefaction wave propagation in underwater explosions. The aim is to understand the influence of a rigid wall on the cavitation evolution process and the cavitation collapse load, considering various charge quantities and water depths. The evolution of crucial physical qualities, such as the density, pressure, and the cavitation domain, within the flow field are analyzed and summarized. The presence of a rigid wall is found to significantly impact the cavitation evolution process in underwater explosions. It affects the shape, size, and dynamics of the cavitation domain, as well as the interaction between the explosion and the surrounding fluid. Specifically, the reflected wave on the wall influences the cavitation collapse load, leading to notable differences in the collapse time and collapse pressure compared to free-field conditions. Under different operating conditions, the size and position of the cavitation domain exhibit distinct changes. The proximity of the rigid wall results in unique patterns of cavitation domain evolution, which in turn lead to variations in the pressure distribution and the emergence of new cavitation regions. The findings of this study provide valuable insights into the behavior of cavitation and atomization induced by underwater explosions near the free surface. The understanding gained from these investigations can contribute to the development of effective safety measures and protective strategies in marine and underwater engineering applications. By accurately predicting and mitigating the effects of cavitation, it is possible to enhance the design and operation of underwater structures, ensuring their integrity and minimizing the potential risks associated with underwater explosions.
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Yan, Qiushi, Chen Liu, Jun Wu, Jun Wu, and Tieshuan Zhuang. "Experimental and Numerical Investigation of Reinforced Concrete Pile Subjected to Near-Field Non-Contact Underwater Explosion." International Journal of Structural Stability and Dynamics 20, no. 06 (May 30, 2020): 2040003. http://dx.doi.org/10.1142/s0219455420400039.

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High-pile wharf is an important port structure and may suffer from accidental explosions or terrorist bombing attack during the service life. The reinforced concrete (RC) pile is one of the popular vertical load-bearing piles of high-pile wharf structure. As a main load-bearing member of the high-pile wharf structure, the damage of RC pile due to underwater explosive may cause subsequently progressive collapse of the whole structure. In this paper, the dynamic response and failure mode of RC pile in high-pile wharf structure under the near-field non-contact underwater explosion are investigated using a combined experimental and numerical study. First, a typical RC pile was designed and tested for the near-field non-contact underwater explosion. The failure mode and damage of the RC pile specimen were obtained and analyzed. Second, the numerical model of the RC pile under near-field non-contact underwater explosion was established by adopting the commercial software AUTODYN, and then validated based on experimental results. It was shown that the results from numerical model and experimental test compared very well in terms of the damage pattern and lateral displacement. Furthermore, the full-scale numerical model of the RC pile for the near-field non-contact underwater explosion was developed based on the validated numerical model to investigate the damage pattern and failure mode of RC pile under varied underwater explosives. Lastly, the safety distance for the RC pile for the underwater explosion loading with consideration of different explosive mass, the explosive depth and the concrete strength was suggested. The outcome of this study presented reference for analysis, assessment and design of the type of RC pile for high-pile wharf structure subjected to near-field non-contact underwater explosion.
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Su, Hao-Chen, Jun Wang, Yun-Long Liu, and Yong-Qiang Gao. "Experimental Study on the Underwater Explosion Bubble Near deformable boundary." Journal of Physics: Conference Series 2660, no. 1 (December 1, 2023): 012012. http://dx.doi.org/10.1088/1742-6596/2660/1/012012.

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Abstract Studying near-field underwater explosions is important for the research of submersible and underwater explosive weapons. In this study, we conducted experiments to investigate the coupling of near-field underwater explosion bubbles with titanium alloy plates and steel plates. Our findings show that the boundary of a titanium alloy plate causes the first pulsation period of a bubble to be longer than in the free field, while the boundary of a steel plate causes the first pulsation period of a bubble to be shorter than in the free field. Furthermore, we simulated the process of the explosion and found that changes in the period may be caused by ventilation.
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Dissertations / Theses on the topic "Underwater explosions"

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Ogilvy, Iver. "Fluid dynamics of underwater explosions." Thesis, University of Birmingham, 2010. http://etheses.bham.ac.uk//id/eprint/8840/.

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The detonation of an explosive in water leads to a complex set of chemical and physical phenomena. When the detonation wave reaches the surface of the explosive it reacts violently with the water, producing a shock wave propagating outwards and also a nearly spherical gaseous bubble of detonation products. The fact that the characteristic time scales of these two phenomena differ by approximately two orders of magnitude has often been exploited by utilising independent models to describe the shock and the bubble. In this thesis both the shock and the bubble are examined using a range of methods from a differential equation solver approach through to full hydrocode simulation. With the increasing use of the hydrocode approach for the underwater explosion (UNDEX) problem and the subsequent loading of a structure, then a verification and validation process is required to ensure its accuracy. In this study the capability of the hydrocode to model the shock and the bubble and also their interaction with a rigid structure and with a flexible structure, has been assessed. This has been done computationally, by using faster running purpose built codes, and also by comparison with experimental data. A familiarisation work-up of the boundary integral code for the incompressible bubble flow, which included incorporating modifications into the code in order to investigate the pathlines swept out by the particles in the fluid during the expansion and collapse of the bubble. The boundary integral code was also used to provide a comparison with the Kelvin impulse method with respect to the computation of the zones of explosion bubble collapse direction in a shallow water environment. The validation and verification work carried out and the comparisons of the various computational approaches, make this multifaceted study a useful reference for research workers in the field of UNDEX phenomena.
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Krueger, Seth R. "Simulation of cylinder implosion initiated by an underwater explosion." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FKrueger.pdf.

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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, June 2006.
Thesis Advisor(s): Young S. Shin. "June 2006." Includes bibliographical references (p. 99-100). Also available in print.
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Hart, David T. "Ship shock trial simulation of USS Winston S. Churchill (DDG-81) : surrounding fluid effect /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FHart.pdf.

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Roux, André. "Protection of electronics in submerged enclosures against underwater explosions." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/5476.

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Includes bibliographical references (leaves 185-187).
In the milieu of military sea mine design, it is often necessary to design mines that are to be placed at small distances from each other. A possible tactical purpose may require that each mine be set to explode at controlled instances in time without disturbing the operation of the other mines in the field or causing sympathetically detonated reactions. Thus two problems (on face value) are prevalent when reliable operation of two mines in close proximity is to be considered. The first problem is sympathetic detonation. The second problem is reliability failure.
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Schneider, Nathan A. "Prediction of surface ship response to severe underwater explosions using a virtual underwater shock environment." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FSchneider.pdf.

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Thesis (Mechanical Engineer and M.S. in Mechanical Engineering)--Naval Postgraduate School, June 2003.
Thesis advisor(s): Young S. Shin. Includes bibliographical references (p. 161-162). Also available online.
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Ucar, Hakan. "Dynamic response of a catamaran-hull ship subjected to underwater explosions." Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FUcar.pdf.

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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, December 2006.
Thesis Advisor(s): Young S. Shin, Jarema M. Didoszak. "December 2006." Includes bibliographical references (p. 137-138). Also available in print.
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Hammond, Lloyd Charles 1961. "The structural response of submerged air-backed plates to underwater explosions." Monash University, Dept. of Civil Engineering, 2000. http://arrow.monash.edu.au/hdl/1959.1/9244.

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Fox, Padraic K. Kwon Young W. "The dynamic response of cylindrical shells subjected to side-on underwater explosions." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School; Available from the National Technical Information Service, 1993. http://handle.dtic.mil/100.2/252856.

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Thesis (M.S. in Mechanical Engineering and Mechanical Engineer) Naval Postgraduate School, March 1992.
Thesis advisor, Young W. Kwon. Cover title: Nonlinear ... to underwater side-on explosions. AD-A252 856. Includes bibliographical references. Also available online.
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Fox, Padraic K., and Young W. Kwon. "The dynamic response of cylindrical shells subjected to side-on underwater explosions." Thesis, Monterey, California: Naval Postgraduate School, 1993. http://hdl.handle.net/10945/24152.

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Elder, David James, and d. elder@crc-acs com au. "Optimisation of parametric equations for shock transmission through surface ships from underwater explosions." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080212.105012.

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Currently shock effects on surface ships can be determined by full scale shock trials, Finite Element Analysis or semi empirical methods that reduce the analytical problem to a limited number of degrees of freedom and include hull configurations, construction methods and materials in an empirical way to determine any debilitating effects that an explosion may have on the ship. This research has been undertaken to better understand the effect of hull shape on surface ships' shock response to external underwater explosions (UNDEX). The study is within the semi empirical method category of computations. A set of simple closed-form equations has been developed that accurately predicts the magnitude of dynamic excitation of different 2- D rigid-hull shapes subject to far-field UNDEX events. This research was primarily focused on the affects of 2-D rigid hull shapes and their contribution to global ship motions. A section of the thesis,
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Books on the topic "Underwater explosions"

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Kormilit︠s︡yn, I︠U︡ N. Podvodnyĭ vzryv i ego vzaimodeĭstvie so sredami i pregradami. Sankt-Peterburg: Nauka, Peterburgskoe otd-nie, 2006.

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Galkin, V. V. Vzryvnye raboty pod vodoĭ. Moskva: "Nedra", 1987.

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Nedwell, J. The pressure impulse from shallow underwater blasting. Southampton, U.K: University of Southampton, Institute of Sound and Vibration Research, 1989.

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Kazanbu, Japan Kishōchō Jishin. Heisei gannen 7-gatsu no Izu Hantō tōhōoki no gunpatsu jishin oyobi kazan funka: Saigaiji jishin kazan genshō sokuhō. [Tokyo]: Kishōchō Jishin Kazanbu, 1989.

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Cotaras, Frederick D. Nonlinear effects in long range underwater acoustic propagation. Austin, Tex: Applied Research Laboratories, University of Texas at Austin, 1985.

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Ozeret︠s︡kovskiĭ, O. I. Deĭstvie vzryva na podvodnye obʺekty. Moskva: T︠S︡NIIKhM, 2007.

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Afanasʹevich, Gulyĭ Grigoriĭ, and Akademii͡a︡ nauk Ukraïnsʹkoï RSR. Proektno-konstruktorsʹke bi͡u︡ro elektrohidravliky., eds. Podvodnyĭ ėlektrovzryv. Kiev: Nauk. dumka, 1985.

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Unit, Canada Dept of Fisheries and Oceans Pacific Region Water Use. Development and evaluation of a model to predict effects of buried underwater blasting charges on fish populations in shallow water areas. Vancouver, B.C: Dept. of Fisheries and Oceans, Habitat Management Division, Water Use Unit, 1986.

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Fox, Padraic K. The dynamic response of cylindrical shells subjected to side-on underwater explosions. Monterey, Calif: Naval Postgraduate School, 1992.

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Stephen, Parvin, and Naval Submarine Medical Research Laboratory, eds. The effects of underwater blast on divers. Groton, CT: Naval Submarine Medical Research Laboratory, 2001.

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Book chapters on the topic "Underwater explosions"

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Matos, Helio, Tyler Chu, Brandon Casper, Matthew Babina, Matt Daley, and Arun Shukla. "Dynamic Behavior of Lungs Subjected to Underwater Explosions." In Dynamic Behavior of Materials, Volume 1, 97–103. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-50646-8_14.

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Costanzo, Frederick A. "Simple Tools for Simulating Structural Response to Underwater Explosions." In Rotating Machinery, Structural Health Monitoring, Shock and Vibration, Volume 5, 481–98. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9428-8_40.

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Mustonen, Mirko, and Aleksander Klauson. "Reporting Impulsive Noise from Underwater Explosions Using Seismic Data." In The Effects of Noise on Aquatic Life, 1–6. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-10417-6_116-1.

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Jenkins, A. Keith, Sarah E. Kotecki, Peter H. Dahl, Victoria F. Bowman, Brandon M. Casper, Christiana Boerger, and Arthur N. Popper. "Physical Effects from Underwater Explosions on Two Fish Species." In The Effects of Noise on Aquatic Life, 1–9. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-10417-6_70-1.

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Gauch, E., J. LeBlanc, C. Shillings, and A. Shukla. "Response of Composite Cylinders Subjected to Near Field Underwater Explosions." In Dynamic Behavior of Materials, Volume 1, 153–57. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41132-3_21.

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Koene, L., and A. J. M. Schmets. "Vulnerability of Harbours and Near-Shore Infrastructure to Underwater Explosions." In NL ARMS, 215–48. The Hague: T.M.C. Asser Press, 2018. http://dx.doi.org/10.1007/978-94-6265-246-0_12.

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Leger, Matthew, Helio Matos, Arun Shukla, and Carlos Javier. "Dynamic Behavior of Curved Aluminum Structures Subjected to Underwater Explosions." In Dynamic Behavior of Materials, Volume 1, 105–9. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-50646-8_15.

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Gitterman, Y., and Lippe D. Sadwin. "Blast Wave Observations for Large-Scale Underwater Explosions in the Dead Sea." In 30th International Symposium on Shock Waves 2, 1315–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-44866-4_91.

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Takayama, K., and O. Onodera. "Holographic Interferometric Study on Propagating and Focusing of Underwater Shock Waves by Micro-Explosions." In Optical Methods in Dynamics of Fluids and Solids, 209–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82459-3_27.

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Sundermeyer, Janne K., Klaus Lucke, Michael Dähne, Anja Gallus, Kathrin Krügel, and Ursula Siebert. "Effects of Underwater Explosions on Presence and Habitat Use of Harbor Porpoises in the German Baltic Sea." In Advances in Experimental Medicine and Biology, 289–91. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-7311-5_64.

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Conference papers on the topic "Underwater explosions"

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Kim, Jae-Hyun, Byung-Young Jeon, and Jae-Hwang Jeon. "Application of Fluid-Structure Interaction Technique for Underwater Explosion Analysis of a Submarine Liquefied Oxygen Tank Considering Survivability." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-58009.

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The design of submarines has continually developed to improve survivability. Explosions may induce local damage as well as global collapse to a submarine structure. Therefore, it is important to realistically estimate the possible damage conditions due to underwater explosions in the design stage. In the present study, the Arbitrary Lagrangian-Eulerian (ALE) technique, a fluid–structure interaction approach is applied to simulate an underwater explosion and investigation of the survival capability of a damaged submarine with clamped liquefied oxygen tank. The Lagrangian-Eulerian coupling algorithm, the equations of state for explosives and seawater, and the simple calculation method for explosive loading were also reviewed. It is shown that underwater explosion analysis using the ALE technique can reasonably evaluate the structural damage caused by explosive load.
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Han, Rui, Aman Zhang, and Shiping Wang. "Pressure Load on Rigid Structure Induced by Double Underwater Explosions." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54158.

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Underwater explosion is a severe threat to nearby ocean structures, such as underwater construction, floating vessels. The pressure load produced by underwater explosion of explosives consists of shock wave load and the explosion bubble pulsation pressure load. After the detonation, there will be a shock wave propagating radially outwards and it’s followed by a large oscillating bubble. The shock wave has the first damaging effect on adjacent structures. Then, the collapse and high-speed jet of oscillating bubbles will cause the second damage to structures. When there are double explosive sources near a rigid structure, the mutual superposition of shock waves and the interaction between two bubbles may improve the explosive damage. If the distance between one explosive source and the rigid structure is fixed, the damage force produced by double underwater explosions is related to many factors, like the detonation time difference and the distance between two explosive sources. At first, the pressure field in single explosive source case is numerically simulated by using the AUTODYN in this paper. Next, pressure fields of underwater explosion detonated by double sources at the same time and with time difference are calculated, respectively. The flow fields in double explosive sources case are compared with that in single explosive source case. The effect of the detonation time difference and the distance between explosive sources on the damage force is investigated and analysed in detail.
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Cao, Juzhen, and Longhe Liang. "Demonstration of numerically simulating figures for underwater explosions." In 24th International Congress on High-Speed Photography and Photonics, edited by Kazuyoshi Takayama, Tsutomo Saito, Harald Kleine, and Eugene V. Timofeev. SPIE, 2001. http://dx.doi.org/10.1117/12.424347.

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KOENE, L., and A. J. M. SCHMETS. "Underwater Demolition of Steel Rods by Contact Explosions." In 31st International Symposium on Ballistics. Lancaster, PA: DEStech Publications, Inc., 2019. http://dx.doi.org/10.12783/ballistics2019/33233.

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Motta, A. A., E. A. P. Silva, N. F. F. Ebecken, and T. A. Netto. "Offshore platforms survivability to underwater explosions: part I." In COMPUTATIONAL BALLISTICS 2007. Southampton, UK: WIT Press, 2007. http://dx.doi.org/10.2495/cbal070111.

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Liang, C. C., and W. M. Tseng. "Numerical study of water barriers produced by underwater explosions." In FLUID STRUCTURE INTERACTION 2009. Southampton, UK: WIT Press, 2009. http://dx.doi.org/10.2495/fsi090071.

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Abe, A., M. Katayama, K. Murata, Y. Kato, K. Tanaka, Mark Elert, Michael D. Furnish, Ricky Chau, Neil Holmes, and Jeffrey Nguyen. "NUMERICAL STUDY OF UNDERWATER EXPLOSIONS AND FOLLOWING BUBBLE PULSES." In SHOCK COMPRESSION OF CONDENSED MATTER - 2007: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2008. http://dx.doi.org/10.1063/1.2832975.

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Sanders, Jacob, and Girum Urgessa. "Response of Reinforced Concrete Columns Subjected to Underwater Explosions." In Structures Congress 2023. Reston, VA: American Society of Civil Engineers, 2023. http://dx.doi.org/10.1061/9780784484777.001.

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Prasad, D. H. S., S. K. Rao, B. P. Patel, and Suhail Ahmad. "Safety Assessment of Marine Structures Subjected to Underwater Explosion." In ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/omae2021-62796.

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Abstract The underwater explosions due to an accident or other potential reasons cause severe shocks in the fluid medium. Safety assessment is an essential design requirement where the blast load concentration is expected due to smaller standoff distances. In the present work, the probabilistic analysis of structural response due to the underwater explosion is studied using NESSUS software. The study helps improve the concepts of improved blast mitigation strategies. The shock loading considered varies spatially and temporally. The fluid pressure is transformed into structural nodal forces. Taylor’s plate theory is used to estimate the shock loading. In the analysis, the material is considered to be rate-dependent elastoplastic with temperature softening. Maximum central deflection against shock factors is obtained to arrive at the safe thickness of the stiffened and unstiffened plates for the optimum design characteristics using LS-DYNA software. The finite element approach adopted efficiently captures expected failures for various combinations of structural properties leading to an optimized design to withstand the target explosion. Johnson-Cook dynamic failure model is employed as a limit state function for reliability assessment. Sensitivity analysis enables to achieve target reliability.
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HUNG, K. C., C. WANG, E. KLASEBOER, C. W. WANG, and B. C. KHOO. "A NUMERICAL STUDY ON BUBBLE STRUCTURE INTERACTION IN UNDERWATER EXPLOSIONS." In Proceedings of the International Conference on Scientific and Engineering Computation (IC-SEC) 2002. PUBLISHED BY IMPERIAL COLLEGE PRESS AND DISTRIBUTED BY WORLD SCIENTIFIC PUBLISHING CO., 2002. http://dx.doi.org/10.1142/9781860949524_0051.

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Reports on the topic "Underwater explosions"

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Strahle, Warren C. Conventional Weapons Underwater Explosions. Fort Belvoir, VA: Defense Technical Information Center, December 1988. http://dx.doi.org/10.21236/ada201814.

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Wardlaw, A. B. Far Field Boundary Conditions for Underwater Explosions. Fort Belvoir, VA: Defense Technical Information Center, December 1994. http://dx.doi.org/10.21236/ada476884.

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Goertner, J. F., M. L. Wiley, G. A. Young, and W. W. McDonald. Effects of Underwater Explosions on Fish Without Swimbladders. Fort Belvoir, VA: Defense Technical Information Center, February 1994. http://dx.doi.org/10.21236/ada276407.

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Baumgardt, Douglas R., and Angelina Freeman. Characterization of Underwater Explosions by Spectral/Cepstral Analysis, Modeling and Inversion. Fort Belvoir, VA: Defense Technical Information Center, May 2005. http://dx.doi.org/10.21236/ada443931.

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Kamegai, M., and J. W. White. A study of near-surface and underwater explosions by computer simulations. Office of Scientific and Technical Information (OSTI), February 1994. http://dx.doi.org/10.2172/10137363.

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Deavenport, Roy L., and Matthew J. Gilchrest. Time-Dependent Modeling of Underwater Explosions by Convolving Similitude Source with Bandlimited Impulse from the CASS/GRAB Model. Fort Belvoir, VA: Defense Technical Information Center, June 2015. http://dx.doi.org/10.21236/ada625680.

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Wardlaw, Andrew, McKeown Jr., Luton Reid, and Alan. Coupled Hydrocode Prediction of Underwater Explosion Damage. Fort Belvoir, VA: Defense Technical Information Center, January 1998. http://dx.doi.org/10.21236/ada363434.

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Schmit, Steve. Cut and capture system technology for demilitarization of underwater munitions. Engineer Research and Development Center (U.S.), April 2024. http://dx.doi.org/10.21079/11681/48376.

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Munitions are encountered in a variety of underwater environments as unexploded ordnance (UXO) or munitions and explosives of concern (MEC). These items can cause unacceptable explosive risks to critical infrastructure, recreational divers, and fishermen. The primary goal of the demonstrations was to validate an underwater suite of tools that can be used to render underwater UXO and MEC safe in shallow water (i.e., up to 100 ft). US Navy underwater ranges in the Gulf of Mexico, south of the Naval Support Activity–Panama City, were selected for the first two demonstrations to fully display the integrated system by processing inert munitions, such as the Navy 5 in./38 cal and the Army 105 mm High Explosive (HE) M1 projectile. The third demonstration, however, occurred at the Naval Surface Warfare Center (NSWC), Crane, Lake Glendora Test Facility, in Sullivan, Indiana. Twenty US Army 105 mm HE M1 projectiles filled with TNT were successfully processed. Overall, this project showed that Gradient Technology’s high-pressure waterjet demilitarization technology can be reliably operated underwater at depths less than 100 ft of seawater when the supporting equipment is located on the deck of a vessel or floating pier system.
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HOGELAND, STEVE R., LLOYD S. NELSON, and THOMAS CHRISTOPHER ROTH. Aluminum-Enhanced Underwater Electrical Discharges for Steam Explosion Triggering. Office of Scientific and Technical Information (OSTI), July 1999. http://dx.doi.org/10.2172/12653.

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Leininger, L. Validation of Air-Backed Underwater Explosion Experiments with ALE3D. Office of Scientific and Technical Information (OSTI), February 2005. http://dx.doi.org/10.2172/917915.

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