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利用有限元分析移动扫描终端外壳在极限温度下的热变形,构建有限元模型,确定边界条件和热载荷,得出移动扫描终端外壳的最大应变。搭建应变测量平台,应用全桥法测量移动扫描终端外壳代表性位置处极限温度下的应变值。结果表明:移动扫描终端在高温或低温下的总变形量都较小,均小于材料的许用应变,说明移动终端在使用温度下变形可靠。测量值与模拟值相比,测量值略大于实验值。
The finite element method was used to analyze the thermal deformation of the mobile scanning terminal housing at the ultimate temperature. The finite element model was established and the boundary conditions and thermal load were determined. The maximum strain of the mobile scanning terminal housing was obtained. Strain measurement platform is set up and full-bridge method is used to measure the strain at the limit temperature of the representative position of the mobile scanning terminal housing. The results show that the total deformation of mobile scanning terminal at high temperature or low temperature is small, both less than the allowable strain of the material, indicating that the mobile terminal deforms reliably at the service temperature. Measured value Compared with the simulated value, the measured value is slightly larger than the experimental value.