Simulation and Validation of Free-Fall Shock Test For Desktop Computer Host

• Main Authors: Wei-Hsiang Lin, 林瑋祥
• Other Authors: Lee-Long Han
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/7qj33y

碩士 === 國立臺北科技大學 === 製造科技研究所 === 100 === This thesis is to study the free-fall shock test of the actual desktop computer host using the ANSYS/LS-DYNA finite elements software and gravity-type free-fall shock test machine. In the simulation analysis, the metal thickness of computer case is 0.6 mm including two types of experimental parameters: (a) half-sine wave, peak acceleration 80 G, duration 3 ms; (b) trapezoidal wave, peak acceleration 40 G, duration 11.2 ms. Simulation analysis results show that the trapezoidal wave shock energy is larger than the half-sine wave was used. In addition, shock direction affects the stress that acts on the component of computer host. Z+ direction is among the maximum stress in the six shock directions. In the actual computer host free-fall shock test, two different types thickness of 0.6 mm and 0.8 mm, two types shock conditions of trapezoidal wave and half-sine wave were used. Results show that there is only one deformation of the 0.8 mm metal thickness under the half-sine wave shock test used. And there are five deformation of the 0.6 mm thickness. When the trapezoidal wave shock test, there are three deformation of the 0.8 mm metal thickness. However, there are six deformations and one crack of the 0.6 mm metal thickness.