【摘要】 本文先用有限元的迦辽金法考虑了曲面上非线性热辐射和热传导的耦合问题,计算得到荫罩、框架组件在工作状态下的温度分布情况,然后运用通用结构分析程序SAP 84计算了组件的热变形,根据电子束轨 求得着屏误差。结果符合实际情况。文中还进一步对影响着屏误差的多种因素进行了计算与分析,所得结果具有重要的实用价值。更多还原

【Abstract】 In this paper, by using the Galerkin finite element method,the temperature distribution of shadow mask and frame is found by solving the nonlinear expression of radiative heat transfer coupled with the conductive mode. The thermal deformation of mask and frame is calculated by using general structure and analysis programe SAP 84. Then the beam landing shift is given by the deviation of the electron beam path. The result shows good agreement with practice. More calculation has been done to analyze several factors which will influence beam landing shifts. These results are of value to the design of shadow mask.更多还原