真空玻璃支撑柱处玻璃的应力分析

Stress Analysis of Vacuum Glazing in the Support Pillar

目的探索真空玻璃支撑柱处玻璃的应力分布,研究真空玻璃单位面积支撑柱的间距和支撑柱的半径对真空玻璃组成结构的影响.方法采用有限元程序和数值分析的方法,通过热-应力顺序耦合分析方法,分别建立不同玻璃样本的三维模型,分析研究了真空玻璃、中空玻璃和单片玻璃的应力分布,在改变真空玻璃支撑柱的间距和半径的情况下真空玻璃支撑柱处玻璃的应力分布.结果单片玻璃的最大主应力主要集中在玻璃边缘的拐角处,中空玻璃的最大主应力是呈不均匀的递减形式,真空玻璃的应力分布均匀;随着支撑柱间距的增加,最大主应力增大得十分明显;随着支撑柱半径的减小,支撑柱与玻璃板接触处的集中载荷将增大,使玻璃板受力不均匀,容易造成玻璃板的破损.结论在选取真空玻璃支撑柱的材料和尺寸时,既要考虑到真空玻璃的保温隔热性又要满足真空玻璃的抗风压性,以利于真空玻璃的节能特性的充分发挥.

By analyzing the stress of vacuum glazing in the support pillar,proper selection of the support pillar plays an important role on the performance of the vacuum glazing. By using the method of heat coupling stress and changing the support pillar＇s numbers, spacing and radius, the construction of the vacuum glazing is optimized. Through calculating the maximum principal stress of the different structure vacuum glazing, comparing and analyzing the calculated results, the vacuum glazing which has the better heat insulation and anti - wind pressure can be gotten. When selecting the material and size of the support pillar, the heat insulation and anti - wind pressure should be considered. So the energy - saving characters of the vacuum glazing can be fully utilized.