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- 저자 : Wenshan Gao (검색결과 2 건)
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Review of Magnetic Coupling Resonance Wireless Energy Transmission
Bin Zhu,Jincheng Li,Wenshan Hu,Xingran Gao 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.3
This paper reviews the magnetic coupling resonance wireless energy transmission from the principle, models and theories based on the development and classification of wireless energy transmission technologies. Firstly, it introduces MIT coupled mode theory and the main circuit theory models and experiments, summarizes and illustrates the characteristics of the two theories. Secondly, it introduces the worldwide research progress in this area, including the circuit theories, three-coil energy transfer systems, multi-receptor, four-coil energy transfer systems, frequency tunable resonance body, adaptive tuning and frequency division, the loss distribution, new materials, mutual inductance coupling and frequency tracking. Finally combined with the main research content of magnetically coupled resonant wireless energy transmission, it points out the existing problems and the direction for the studies of the theory and application next step.
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Study on the Vehicle-Induced LTAS Law of the Tunnel in Diatomite Area
Huijian Zhang,Shuai Zhang,Wei Fang,Gongning Liu,Wenshan Gao,Zuoyang Jiang,Kai Liu 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.4
Due to the weak characteristics of diatomite, excessive settlement may happen under long-term dynamic vibration load and affect the later operation of trains, while there are few researches on the dynamic response of highway tunnel in diatomite yet. Taking the Feifengshan high-speed railway tunnel project as the study case, the impact of different reinforcement parameters on long-term accumulated settlement (LTAS) rule of the highway tunnel in the diatomite area under train load is studied by numerical simulation and layer-wise summation method (LWSM). The results reveal that tunnel LTAS in diatomite area mainly appears in the first and the second years of the running stage of train, and the LTAS in these two years accounts for half of the ultimate stable LTAS. The longer the pile length (PL) and the larger the pile diameter (PD), the smaller the dynamic deviatoric stress (DDS) and LTAS. However, when pile lengths or pile diameter exceed a certain range (PL = 16 m or the PD = 150 mm), the control effect of increasing the PL and PD on the LTAS of the tunnel in diatomite is no longer significant. This indicates that there exist preferred values of the PL and PD. There are few cases of the construction of highway tunnels in the diatomite area before the engineering project in this paper yet. Hence, this paper will provide a reference to the construction of the foundation reinforcement scheme of high-speed railway tunnels in diatomite layer.
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