The Investigation of Planar Shock Across a Flexible and a Rigid Inclined Surfaces

• Main Authors: Chih-Chieh Ho, 何志傑
• Other Authors: Fan-Ming Yu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/43856211150822468739

碩士 === 國立成功大學 === 航空太空工程學系專班 === 96 === In this research, we took advantage of two sophisticated commercial finite element analysis software, which are Patran and Dytran and being developed by MSC Software Company to analysis the planar shock across a flexible and a rigid inclined surfaces and to study the variation of strain on the surface by numerical modeling. The simulation model is built of shell coppers and brasses with the thickness of 0.2 and 0.03 with distinctive consideration of different coupling techniques, which are named as the Lagrangian and the Eulerian techniques to two different elements, for better illustrating the interaction of shock in the simulation. The shock wave tube experiment of the same model arrangement and the results are fullfilled by measuring the strain of the shell copper from a strain gauge planted in it,which is impacted by the incident shock wave. Meanwhile, the data is correlate with the results generated by the Dytran modeling to ensusre the accuracy of the numerical simulation. It is a successful analytical approach which is conducted effectively by manipulating the softwares of Hypermesh、Nastran、Patran and Dytran programs to simulate the phenomenon of plane shock wave impulse on a metal sheet. It is not only the cost and risk of experiments are reduced, but also the strain status can be foreseen.