In the analysis of a structure subjected to an explosion event, the determination of the blast load constitutes a crucial step. The effect of the blast load on the structure depends not only on the peak shock overpres...In the analysis of a structure subjected to an explosion event, the determination of the blast load constitutes a crucial step. The effect of the blast load on the structure depends not only on the peak shock overpressure, but also the impulse (hence the duration). For structures with a regular geometry, the blast load may be fairly well estimated using appropriate empirical formulae; however, for more complex situations, a direct simulation using appropriate computational techniques is necessary. This paper presents a numerical simulation study on the prediction of the blast load in free air using a hydrocode, with focus on the sensitivity of the simulated blast load to the mesh grid size. The simulation results are compared with empirical predictions. It is found that the simulated blast load is sensitive to the mesh size, especially in the close-in range, and with a practically affordable mesh grid density, the blast load tends to be systematically underestimated. The study is extended to internal blast cases. An example concrete slab under internal explosion is analyzed using a coupled analysis scheme. The internal blast load from the simulation is examined and the response of the RC slab is commented.展开更多
Taking the underwater reef blasting in Gulei sea channel of Xiamen Port as an example,the forming characteristic of shock wave in water for underwater drilling blasting is analyzed.By field monitoring,the pressure of ...Taking the underwater reef blasting in Gulei sea channel of Xiamen Port as an example,the forming characteristic of shock wave in water for underwater drilling blasting is analyzed.By field monitoring,the pressure of shock wave in water for different distances is attained;the major parameters such as pressure amplitude and positive action time,and the propagation attenuation rule of shock wave in water are analyzed in this paper.The results can be helpful for engineering design and construction and environmental safety assessment.展开更多
HAO Jing-fang, a Chinese writer with her novel Folding Beoing, was awarded the 2016 Hugo Award, the top award in global science fiction community, the second for Chinese science fiction writers after LIU Ci-xin for hi...HAO Jing-fang, a Chinese writer with her novel Folding Beoing, was awarded the 2016 Hugo Award, the top award in global science fiction community, the second for Chinese science fiction writers after LIU Ci-xin for his The Three-Body Problem, which stroke a strong shockwave to the science fiction community around the world. It cannot be denied that Ken LIU＇s translation has played an irreplaceable role in the success of Folding Beijing Unfortunately, there are a few studies on LIU＇s translation of Folding Beoing, let alone with Skopos theory. This paper refers to massive studies on it by scholars at home and abroad and is based on a careful reading of Folding Beifing, its translation counterpart and concludes that the translator adopts Skopos theory in translating figurative rhetoric by linking the three basic roles with the LIU＇s ideas on translation. This paper studies the translation on the figurative rhetoric in Folding Beijing and extracts so many typical sentences as to certify the flexible strategies and methods adopted by the author under Skopos theory, which conforms to the reading habit and taste of the target audience and provides a paradigm for the future translation of Chinese science fictions展开更多
文摘In the analysis of a structure subjected to an explosion event, the determination of the blast load constitutes a crucial step. The effect of the blast load on the structure depends not only on the peak shock overpressure, but also the impulse (hence the duration). For structures with a regular geometry, the blast load may be fairly well estimated using appropriate empirical formulae; however, for more complex situations, a direct simulation using appropriate computational techniques is necessary. This paper presents a numerical simulation study on the prediction of the blast load in free air using a hydrocode, with focus on the sensitivity of the simulated blast load to the mesh grid size. The simulation results are compared with empirical predictions. It is found that the simulated blast load is sensitive to the mesh size, especially in the close-in range, and with a practically affordable mesh grid density, the blast load tends to be systematically underestimated. The study is extended to internal blast cases. An example concrete slab under internal explosion is analyzed using a coupled analysis scheme. The internal blast load from the simulation is examined and the response of the RC slab is commented.
基金National Natural Science Foundation of China （No. 51174147） Natural Science Foundation of Hubei Province （No. 2012FFA135）
文摘Taking the underwater reef blasting in Gulei sea channel of Xiamen Port as an example,the forming characteristic of shock wave in water for underwater drilling blasting is analyzed.By field monitoring,the pressure of shock wave in water for different distances is attained;the major parameters such as pressure amplitude and positive action time,and the propagation attenuation rule of shock wave in water are analyzed in this paper.The results can be helpful for engineering design and construction and environmental safety assessment.
文摘HAO Jing-fang, a Chinese writer with her novel Folding Beoing, was awarded the 2016 Hugo Award, the top award in global science fiction community, the second for Chinese science fiction writers after LIU Ci-xin for his The Three-Body Problem, which stroke a strong shockwave to the science fiction community around the world. It cannot be denied that Ken LIU＇s translation has played an irreplaceable role in the success of Folding Beijing Unfortunately, there are a few studies on LIU＇s translation of Folding Beoing, let alone with Skopos theory. This paper refers to massive studies on it by scholars at home and abroad and is based on a careful reading of Folding Beifing, its translation counterpart and concludes that the translator adopts Skopos theory in translating figurative rhetoric by linking the three basic roles with the LIU＇s ideas on translation. This paper studies the translation on the figurative rhetoric in Folding Beijing and extracts so many typical sentences as to certify the flexible strategies and methods adopted by the author under Skopos theory, which conforms to the reading habit and taste of the target audience and provides a paradigm for the future translation of Chinese science fictions
