This research aims to elucidate the navigational situation of ships during the massive tsunami that occurred in the Tohoku district of Japan on March 11,2011. In particular, it focuses on the time the massive tsunami ...This research aims to elucidate the navigational situation of ships during the massive tsunami that occurred in the Tohoku district of Japan on March 11,2011. In particular, it focuses on the time the massive tsunami encountered ships. AIS （automatic identification system）, which is required to be fitted aboard large ships for identifying and locating vessels, was used for the analysis of the navigational status of ships. It was confirmed that a group of ships sailing off the coast suddenly changed course. It was also verified that the ships had been struck by the tsunami, and the time of the strike was identified. The novelty and importance of this research are as follows. First, the behaviour of many ships that encountered the massive tsunami was clarified. There are no earlier instances of simultaneous and detailed recording of the behaviour of many ships encountering a massive tsunami. Second, the movement of the ships that encountered the tsunami was analysed, and the time of the maximum wave of the tsunami was verified. The research presents, for the first time in ship history, the status of a ship at the time of a tsunami using objective navigational data.展开更多
In this paper, a 3D source distribution technique is used to calculate the coupled motions between two ships which advance in the wave with the same speed. The numerical results of coupled motions for a frigate and a ...In this paper, a 3D source distribution technique is used to calculate the coupled motions between two ships which advance in the wave with the same speed. The numerical results of coupled motions for a frigate and a supply ship have a good agreement with the experimental results. Based on the 3D coupled motions of two ships, a spectral analysis is employed to clearly observe the effect of speed, clearance and wave heading on the significant relative motion amplitude (SRMA) of two ships. The method presented in this paper will be helpful to select suitable clearance, speed and wave heading for underway replenishment at sea(RAS).展开更多
THE 20th Chinese naval escort taskforce took over the escort mission in the Gulf of Aden from the 19th escort taskforce on April 22,2015.Since the end of 2008,under the authorization of the UN Security Council and the...THE 20th Chinese naval escort taskforce took over the escort mission in the Gulf of Aden from the 19th escort taskforce on April 22,2015.Since the end of 2008,under the authorization of the UN Security Council and the consent of the Somali government,China has carried out all such escort missions in the Gulf of Aden.To date,over 50 Chinese naval ships have been dispatched to the region and the taskforce has fulfilled over 800 missions of escorting more than 5,000 Chinese and foreign vessels.展开更多
文摘This research aims to elucidate the navigational situation of ships during the massive tsunami that occurred in the Tohoku district of Japan on March 11,2011. In particular, it focuses on the time the massive tsunami encountered ships. AIS （automatic identification system）, which is required to be fitted aboard large ships for identifying and locating vessels, was used for the analysis of the navigational status of ships. It was confirmed that a group of ships sailing off the coast suddenly changed course. It was also verified that the ships had been struck by the tsunami, and the time of the strike was identified. The novelty and importance of this research are as follows. First, the behaviour of many ships that encountered the massive tsunami was clarified. There are no earlier instances of simultaneous and detailed recording of the behaviour of many ships encountering a massive tsunami. Second, the movement of the ships that encountered the tsunami was analysed, and the time of the maximum wave of the tsunami was verified. The research presents, for the first time in ship history, the status of a ship at the time of a tsunami using objective navigational data.
文摘In this paper, a 3D source distribution technique is used to calculate the coupled motions between two ships which advance in the wave with the same speed. The numerical results of coupled motions for a frigate and a supply ship have a good agreement with the experimental results. Based on the 3D coupled motions of two ships, a spectral analysis is employed to clearly observe the effect of speed, clearance and wave heading on the significant relative motion amplitude (SRMA) of two ships. The method presented in this paper will be helpful to select suitable clearance, speed and wave heading for underway replenishment at sea(RAS).
文摘THE 20th Chinese naval escort taskforce took over the escort mission in the Gulf of Aden from the 19th escort taskforce on April 22,2015.Since the end of 2008,under the authorization of the UN Security Council and the consent of the Somali government,China has carried out all such escort missions in the Gulf of Aden.To date,over 50 Chinese naval ships have been dispatched to the region and the taskforce has fulfilled over 800 missions of escorting more than 5,000 Chinese and foreign vessels.
