Underwater explosion induced shock loading of structures: Influence of water depth, salinity and temperature

Ghoshal, Ritwik

doi:10.1016/j.oceaneng.2016.08.019

Cited by 16 publications

(5 citation statements)

References 18 publications

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“…Underwater acoustic propagation is suitable for underwater environments because it has characteristics such as long propagation distance and low loss, which allows underwater acoustic sensor networks to play an important role in underwater applications. The velocity of underwater acoustic propagation is affected by the properties of the medium such as temperature, pressure, salinity, and considering these factors comprehensively, the propagation velocity of an acoustic wave in an underwater environment can be expressed by the following equation [29]:…”

Section: Underwater Acoustic Communication Modelmentioning

confidence: 99%

An Underwater Source Location Privacy Protection Scheme Based on Game Theory in a Multi-Attacker Cooperation Scenario

Wang,

Yue,

Hao

et al. 2024

Sensors

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Ensuring source location privacy is crucial for the security of underwater acoustic sensor networks amid the growing use of marine environmental monitoring. However, the traditional source location privacy scheme overlooks multi-attacker cooperation strategies and also has the problem of high communication overhead. This paper addresses the aforementioned limitations by proposing an underwater source location privacy protection scheme based on game theory under the scenario of multiple cooperating attackers (SLP-MACGT). First, a transformation method of a virtual coordinate system is proposed to conceal the real position of nodes to a certain extent. Second, through using the relay node selection strategy, the diversity of transmission paths is increased, passive attacks by adversaries are resisted, and the privacy of source nodes is protected. Additionally, a secure data transmission technique utilizing fountain codes is employed to resist active attacks by adversaries, ensuring data integrity and enhancing data transmission stability. Finally, Nash equilibrium could be achieved after the multi-round evolutionary game theory of source node and multiple attackers adopting their respective strategies. Simulation experiments and performance evaluation verify the effectiveness and reliability of SLP-MACGT regarding aspects of the packet forwarding success rate, security time, delay and energy consumption: the packet delivery rate average increases by 30%, security time is extended by at least 85%, and the delay is reduced by at least 90% compared with SSLP, PP-LSPP, and MRGSLP.

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Section: Underwater Acoustic Communication Modelmentioning

confidence: 99%

An Underwater Source Location Privacy Protection Scheme Based on Game Theory in a Multi-Attacker Cooperation Scenario

Wang,

Yue,

Hao

et al. 2024

Sensors

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“…As the designed water level of the ree Gorges is up to 175 m and the reach is located in the upper fluctuating backwater area, the maintenance workload will increase with years and may even form new silt shoals. ere are 5 reefs to be exploded in the dredging project, and the total amount of the reef is about 154,000 m 3 . e measured data of this research are collected from the Zuanzhaozi Reef, which is saturated with moderate and strong weathering sandstones.…”

Section: Case Studymentioning

confidence: 99%

“…In underwater blasting engineering, only 20% to 30% energy released by explosive explosion is spent to break rock mass, while the rest exerts adverse effects to the surrounding environment, such as seismic wave, shock wave, dust and fumes, and fly rocks. [1][2][3]. Among which, seismic wave is the most destructive one.…”

Section: Introductionmentioning

confidence: 99%

Study on the Attenuation Characteristics of Seismic Wave Energy Induced by Underwater Drilling and Blasting

Peng

et al. 2019

Shock and Vibration

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Seismic wave induced by underwater drilling and blasting may exert adverse effects to the surrounding structures. Peak particle velocity (PPV) has been widely used to reflect the intensity of seismic wave, while the method fails to take other influential parameters into consideration. Synthesizing PPV and duration, seismic wave energy (SWE) is employed to quantify the intensity, and the method of time-frequency analysis is adopted to study the characteristics of vibration frequency. Besides, this paper deduces the prediction formula for SWE via dimension analysis. Based on the practical engineering, the attenuation characteristics of SWE induced by underwater drilling and blasting is analysed by the wavelet transform and adaptive optimal kernel (AOK) time-frequency analysis method. Results show that the dominant frequencies at the directions of horizontal tangential, horizontal radial, and vertical are different and the energies in high-frequency bands are extremely low. Moreover, the lower the frequency is, the slower the attenuation of SWE is. Comparing with other prediction formulas of PPV, fitting the SWE with the help of the prediction formula in this study would achieve more accurate prediction results.

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“…The shock wave signals of underwater explosion are related to water depth. Dong et al [4] verified influences of underwater explosion depth on bubble pulsation of shallow water explosion, and Ghoshal and Mitra [5] verified that underwater explosion depth played an important role in determining the basis for reflection coefficient. Therefore, it is necessary to simulate and control the water depth in experiment.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on the dynamic characteristics of underwater shock wave pressure sensor

Wang¹,

Xu²

2021

Vib. proced.

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With respect to the calibration of dynamic pressure measurement system under specific underwater explosion application environment, this paper has proposed an experimental calculation method for the dynamic characteristics of underwater shock water pressure sensor based on a preloaded water shock tube. This was done by analyzing the dynamic calibration principles of the preloaded water shock tube and studying the dynamic influencing factors pertaining to the sensor. Moreover, a dynamic calibration experiment for the sensor was also designed based on a comparative calibration method, through which a calculation method for the dynamic characteristics of underwater shock wave pressure sensor was acquired. The experimental results have proven that applying preloaded water shock tube can effectively acquire the dynamic characteristics of the pressure sensor, thereby providing a research framework for the dynamic calibration of underwater explosion shock wave pressure sensor.

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Underwater explosion induced shock loading of structures: Influence of water depth, salinity and temperature

Cited by 16 publications

References 18 publications

An Underwater Source Location Privacy Protection Scheme Based on Game Theory in a Multi-Attacker Cooperation Scenario

An Underwater Source Location Privacy Protection Scheme Based on Game Theory in a Multi-Attacker Cooperation Scenario

Study on the Attenuation Characteristics of Seismic Wave Energy Induced by Underwater Drilling and Blasting

Experimental research on the dynamic characteristics of underwater shock wave pressure sensor

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