Results 11 to 20 of about 1,053,208 (209)

An underwater discharge shockwave separation method based on minimum-phase cepstrum

AIP Advances, 2021
Underwater discharge sound sources are widely utilized. The acoustic signals generated by underwater discharge consist of shock waves and bubble pulsations.
Liang Qiao, Xiaobing Zhang, Bing Yan, Yang Liu, Zhen Han   +4 more
doaj   +1 more source

Numerical analysis of transient fluid-structure interaction of warship impact damage caused by underwater explosion using the FSLAB

Zhongguo Jianchuan Yanjiu, 2022
ObjectivesThis paper aims to address the numerical simulation problems of the dynamic response of ships subject to near-, medium- and far-field underwater explosions by establishing several numerical methods and calculation models. MethodsFirst, load and
Yunlong LIU, Pingping WANG, Shiping WANG, Aman ZHANG   +3 more
doaj   +1 more source

One-dimensional nanoimprinting using linear explosives

Materials & Design, 2021
Previously, a novel sub-micron shock imprinting technique based on explosive-derived underwater shock waves was developed. In general, an underwater shock wave, whose high-pressure duration is considerably larger than that of laser-induced shock waves ...
Kouki Hasegawa, Shigeru Tanaka, Ivan Bataev, Daisuke Inao, Masatoshi Nishi, Akihisa Kubota, Kazuyuki Hokamoto   +6 more
doaj   +1 more source

Experimental study on discharging current to reduce voltage stress during underwater shock wave generation

Energy Reports, 2022
In food processing using underwater shock waves, the intensity of shock waves is determined by a discharging current from an output capacitor. In past studies, to realize efficient food processing, the underwater shock wave has been generated by charging
Kei Eguchi, Daigo Nakashima, Takaaki Ishibashi   +2 more
doaj   +1 more source

Sub-micrometer and nanoscale imprinting on large-area foils using high-pressure underwater shock waves

, 2021
Laser shock imprinting (LSI) is an emerging method for creating sub-micrometer and nanoscale reliefs on thin metal foils. This report proposes using underwater shockwaves, generated by detonating an explosive charge, for high-quality imprinting as an ...
Shigeru Tanaka, Kouki Hasegawa, I. Bataev, A. Kubota, K. Hokamoto   +4 more
semanticscholar   +1 more source

Effects of each operating condition on the underwater shock waves driven by imploding detonation and microorganism treatment experiments

Journal of Thermal Science and Technology, 2015
In recent years, microorganisms contained in ship ballast water have been identified as vectors for the destruction of marine ecosystems. To control such microorganisms, various techniques are being developed and tested.
Yohichi UDAGAWA, Minoru SUZUKI
doaj   +1 more source

Analysis of underwater explosion shock on ship shaft stern bearing lubrication characteristics under different bearing working conditions

International Journal of Naval Architecture and Ocean Engineering, 2022
Warship always face the threat of underwater explosion shock, which may affect the ship stern tube bearing lubrication performance when the propeller shaft is bending.
Junchao Zhu, Guangcheng Wei, Zilong Peng, Zhaowang Xia, Liangyan Zheng, Hanhua Zhu   +5 more
doaj   +1 more source

Pressure Hull Analysis under Shock Loading

Shock and Vibration, 2008
The hull of high performance submarines must resist underwater shock loading due to exploding torpedoes or depth bombs. An underwater shock involving an initial shock wave and successive bubble pulsating waves is so complex that a theoretical technique ...
Ya-Jung Lee, Chia-Hao Hsu, Chien-Hua Huang   +2 more
doaj   +1 more source

Multi-layer protective armour for underwater shock wave mitigation

Defence Technology, 2015
The effect of underwater shock wave on different target plates has been studied. An underwater shock wave generator (shock tube) was used to study the interactions between water and different constructed targets which act as shock wave mitigation. Target
Ahmed Hawass, Hosam Mostafa, Ahmed Elbeih   +2 more
doaj   +1 more source

Limiting Performance Analysis of Underwater Shock Isolation of a System with Biodynamic Response Using Genetic Algorithm

Shock and Vibration, 2000
Biodynamic response of shipboard crew to underwater shock is of a major concern to navies. An underwater shock can produce very high accelerations, resulting in severe human injuries aboard a battleship.
Z. Zong, K.Y. Lam, Tessa Gan
doaj   +1 more source