| Summary: | 碩士 === 國防大學中正理工學院 === 軍事工程研究所 === 92 === The intact buried structure analysis subjected to the transient loading involved the several problems, for example, ground response, ground impedance, foundation scattering and the ground-structure interaction response. And the above-mentioned analyses are complex. So, we usually use numerical simulation to analyse this, because there is no analytical solution to use. In the engineering application, we usually use TM5-855-1 to be the design standard in our country, but there are some problems about the design parameters in Taiwan. If there will be a reasonable numerical model, this will be a perfect and efficient way in the research of the design parameters. Synthesize the above the consider, it is necessity for the research of the transient response of the buried structures numerical simulation.
Therefore, the research discusses the LS-DYNA and the material model, numerical methods first; then according to investigate by in the past scholar reveal, to check the reliability the numerical simulation models. At last, for proceed to reasonable simulate the soil or the structure response due to the transient loading, and be according to TM5-855-1 to design a series of the cases.
By analysis result show, there is a fine simulated ability for the fast changing the shape and the transient problems to use the ‘Arbitrary Lagrangian Eulerian’ to describe element moving. And the simulation of the soil crater and the ejecta is like the actual phenomenon. The Krieg model is common corrected elastic-plastic model, and the model can behavior the soil dynamic response and used in three-dimension model, and the parameters can get in general experiment. LS-DYNA had a fine simulated ability for the soil-structure system response due to the explosion. In the future, we can use the ability and the field experiment to review the feasibility of the laboratory experiment.
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