Visualization of shock wave propagation due to underwater explosion

Rajasekar, Jayabal; Kim, Tae Ho; Kim, Heuy Dong

doi:10.1007/s12650-020-00664-9

Cited by 15 publications

(3 citation statements)

References 22 publications

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“…8). However, the shock waveform is very different for the case of an explosive charge located in a container in the water column, which is consistent with the results reported in the literature (see, e.g., [40,Figs. 8 and 10]).…”

Section: A Signals Recorded By the Shock Gauge Transducersupporting

confidence: 91%

Assessment of Risks Induced by Countermining Unexploded Large-Charge Historical Ordnance in a Shallow Water Environment—Part I: Real Case Study

Favretto-Cristini

Garlan

Morio

et al. 2022

IEEE J. Oceanic Eng.

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The goal of the work presented in a two-companion paper is to pave the way for reliably assessing the risks of damage to buildings on the shore, induced by the detonation of unexploded historical ordnance (UXO) of large weights in variable shallow water environments with a water depth less than 50 m. The risk assessment is quantified through the seismic magnitude on the Richter scale, induced by the detonation of charges of different weights (between 80-and 680-kg TNT-equivalent). This metric is investigated experimentally using a coupled seismo-acoustic approach within the framework of a UXO clearance (countermining) campaign in the Mediterranean Sea. Analysis of real acoustic and seismic data shows that, compared to a charge detonation in water, a similar detonation on the seabed generates seismic signals of lower frequencies and higher amplitudes that propagate in the seabed. The larger the charge weight, the higher the seismic amplitude. Besides the explosion-coast distance, the ground properties also Manuscript

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Section: A Signals Recorded By the Shock Gauge Transducersupporting

confidence: 91%

Assessment of Risks Induced by Countermining Unexploded Large-Charge Historical Ordnance in a Shallow Water Environment—Part I: Real Case Study

Favretto-Cristini

Garlan

Morio

et al. 2022

IEEE J. Oceanic Eng.

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“…The major causes of PSV performance degradation are cavitation and wear. The root cause can be a disruption in fluid flow distribution/dynamics; boundary-layer formation [32] and pressure drops across valve flow regions [33,34]; gas bubble formation and collapse [35,36]; variations in geometric configuration and the shape of components such as the poppet of the valve (i.e., chamfered conical, blunt, or spherical) [37]; nozzle tips [38]; inlet/outlet piping [39]; abrupt pressure fluctuations [40]; and acoustic resonance.…”

Section: Case Studies: Plant-level Accidents Due To Psv Failurementioning

confidence: 99%

Sizing and Selection of Pressure Relief Valves for High-Pressure Thermal–Hydraulic Systems

Bhowmik,

Sabharwall

2023

Processes

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This study covers the critical concerns related to the sizing, selection, installation, maintenance, and testing of pressure safety valves (PSVs). The aim is to ensure the safety of pressurized systems, hydrostatic transmission systems, and hydraulic plants, including process plants, thermal power plants, and nuclear reactor systems. PSVs are devices that ensure the safety and reliability of pressurized vessels, lines, and systems during overpressure events. The task of selecting which PSV features are of greatest value for a specific purpose is complex—especially in the design of a high-pressure experimental thermal–hydraulic facility for hydrostatic and transient testing of the reactor system—when the systems are in the design and development phases and require qualification and demonstration to prove that they have reached a given level of technological readiness. The present study highlights the required steps for users to follow the associated rules, guidelines, and recommendations. As a part of this research, case studies are presented to help readers better understand the applicable strategy and standards. A discussion and a review of PSV performance degradation and failure are summarized to provide a better understanding of varied process applications and conditions, including fluid flow dynamics, boundary-layer formation and pressure drops, gas bubble formation and collapse, geometric configurations, inlet/outlet piping, abrupt pressure fluctuations, and acoustic resonance. Moreover, this study discusses the servicing and testing of PSVs in a multiphase pressurized system. Overall, it provides a basic overview of how PSVs ensure the safety of pressurized systems, supported by case studies and industrial practices.

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“…The resistance against shock waves is an important topic in the marine engineering according to vibration stability. In the free field, locally high-pressure shock waves are produced by underwater explosions and propagate through the water medium causing i. a. cavitation effects nearby the water surface as well as shock impulse excitations on solid structures within the water [1]. Thus, naval vessels have to be resistant against those impacts and protect their transport and dangerous goods by shock isolators.…”

Section: Introductionmentioning

confidence: 99%

Simulation models investigating the dynamic characteristics of shock isolators

Clasen

Sachau

2023

Proc Appl Math and Mech

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In the marine environment, naval vessels are often influenced by underwater compression waves. Transport and dangerous goods require advanced protection beyond linear, static considerations. Therefore with regard to shock influence, the dynamic characteristics of helical wire‐cable‐isolators are investigated. The shock impact is given by basepoint acceleration measurement data exciting a mechanical model observing nonlinear stiffness as well as hysteretic damping effects. Three simulation models are presented here: the advanced Kelvin‐Voigt model, the join patch model and the modified Bouc‐Wen‐Model. A comparison between simulation and measurement results is given.

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Visualization of shock wave propagation due to underwater explosion

Cited by 15 publications

References 22 publications

Assessment of Risks Induced by Countermining Unexploded Large-Charge Historical Ordnance in a Shallow Water Environment—Part I: Real Case Study

Assessment of Risks Induced by Countermining Unexploded Large-Charge Historical Ordnance in a Shallow Water Environment—Part I: Real Case Study

Sizing and Selection of Pressure Relief Valves for High-Pressure Thermal–Hydraulic Systems

Simulation models investigating the dynamic characteristics of shock isolators

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