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The shielding effectiveness (SE) test is usually implemented in the bounded-wave simulator. However, numerical simulating the SE of a shielding enclosure is mostly modeled with plane wave incidence. In this paper we present the parallel FDTD method to analyze the SE of a shielding enclosure in bounded-wave simulator. An improved formalism for thin slot is adopted. The result shows that the result...
Ordos is in the northwest of China, its climate is arid, rainless, and has strong evaporation. Evaporation is the main groundwater discharge item of this area, the research on the temporal and spatial distribution of groundwater evaporation has great significance for rational development of groundwater resources and environment protection. The previously study methods are very difficult to achieve...
Aimed at the problem of water shortage for irrigation while encountering the extra draught year in Yinchuan plain, by using hydrogeological numerical model, this paper proposed a way of improving the proportion of well irrigation to ensure agriculture irrigation to the most extent during the extra draught year, and utilize the surface water for irrigation again in the following years while the Yellow...
When making trip mode choice, travelers often take account of personal private cost such as travel time and money spent, while no considering external cost consisted of congestion effect or pollutions of air and noise. There is a big difference between the external cost of different travel modes in urban passenger transport, and the neglect of the external cost is to blame for mode imbalance in Chinese...
The MOP (Massive Ordnance Penetrator) is non-nuclear earth penetrator weapon which has the best damage effectiveness now. The targets of MOP will be deeply underground headquarters and hard deeply buried targets. It has been simulated by using LS-DYNA finite-element software to analyze damage effectiveness of MOP, especially the relation of minimal depth of the defense cover. and span length, which...
BLU-113 is earth penetrator warhead commonly used. It has been simulated by using LS-DYNA finite-element software to analyze damage effectiveness of BLU-113, which BLU-113 attacks underground protective works under different deepness from 10 to 22 m. In the simulation, shotcrete layers, anchor-hold rocks and loose rocks are taken into account. The penetration process and explosive process of BLU-113...
FLAC3D (Fast Lagrangian Analysis of Continua in 3 Dimensions), developed by Itasca Consulting Group Inc., USA, is widely used as computational package in the world. For some complex geologic problems, numerical models with FLAC3D are difficult to construct. Therefore, a fast modeling method, which consists of building complicated numerical models with FLAC3D by using ANSYS software, is put forward...
Explosion damage effect of Massive Ordnance Penetrator (MOP) is more than 10 times the explosive power of its predecessor, the BLU-109. The targets of MOP will be deeply underground headquarters and hard deeply buried targets. It has been simulated by using LS-DYNA finite-element software to analyze damage effect of MOP, which MOP attacks underground protective works under different deepness from...
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