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3D-FSM·DDM IBEM numerical system of multi-medium

Journal of Coal Science & Engineering(China) 2007年第3期13卷 366-369页

作者：秦忠诚刘承论赵迁乔赵祉业 Key Laboratory of Disaster Prevention and Control Shandong University of Science and Technology Qingdao 266510 China

Based on the idea of the developed *** boundary element method, the field with muti-medium was formulized firstly, then connected at the interface of two fields according to the continuous conditions of stress and displacement, after that, a boundary value problem with unified model was formed and solved. Ultimately, an applied numerical simulation system was developed. It was compared with the model having analytical solution for verifying the applicability and the calculating precision.

关键词： multi-medium fictitious stress method (FSM) displacement discontinuity method (DDM) indirect boundary element method (IBEM) numerical simulation system

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Dynamic parameters of multi-cabin protective structure subjected to low-impact load e Numerical and experimental investigations

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Defence Technology（防务技术） 2020年第5期16卷 988-1000页

作者： Jing-xin Ma Ru-wen Wang Sheng-zhuo Lu Wei-dong Chen College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin150001PR China Beijing Key Laboratory of Cryogenic Technology Research Beijing Institute of Astronautical Systems EngineeringBeijing100076PR China

The dynamic response of a multi-cabin protective structure subjected to impact load directly affects the protective performance of materials;thus,studying the dynamic response and communication law of wave effect of the load plays an important role in the prediction of protective *** this study,the protection experiments of box-structure under air-and/or water-medium are conducted,the dynamic response of the structure subjected to low-impact load is analyzed,and the corresponding numerical simulations are analyzed using the theory of finite element method(FEM).Combined with experimental and FEM simulations,the shock strain distribution,acceleration attenuation,and signal energy in defensive materials are *** on the results,the metal structure exhibits good absorption characteristics for shock *** the experimental data,we also show that the attenuation of shock wave in water medium should be significantly better than that in air medium,and the protective structure should be designed for a combination of water and air ***,the numerical simulation can provide a quantitative analysis process for dynamic analysis of defensive materials.

关键词： multi-medium Defensive materials Low-impact load Experimental investigation Numerical analysis

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The survey of touristry information system

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Journal of Geographical Sciences 1999年第1期9卷 77-82页

作者： MAO Zheng-yuan(Department of Geography, Central China Normal University, Wuhan 430079, China)

In this paper, the writer briefly introduces the concept of touristry information system (TIS), its current research situation, its necessity and urgency of development, analyses the structure, function and technical ... 详细信息

关键词： tourism Touristry Information System (TIS) touristry consumption touristry management touristry administration multi-medium network

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