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采用弹性有限元法对生产大型铝合金整体壁板用扁挤压筒的受力情况进行了数值模拟，获得了扁挤压筒各层套间装配接触压力的分布，以及扁挤压筒在不同内压、不同结构尺寸和不同装配条件下的应力分布情况和强度条件。结果表明，扁挤压筒各层套之间的装配接触压力分布不均；现行内孔尺寸为８５０ｍｍ×２５０ｍｍ的扁挤压筒，其最大允许工作内压为５００ＭＰａ；将现行扁挤压筒的内孔尺寸改为８５０ｍｍ×３２０ｍｍ，采用合适的装配过盈量，其最大允许工作内压可达６００ＭＰａ。
The elastic finite element method was used to simulate the force of the flat extrusion cylinder for the production of large-scale aluminum alloy monolithic siding. The distribution of contact pressure of the assembly of the flat extrusion cylinder and the flat extrusion cylinder was obtained. Pressure, different structural dimensions and stress distribution under different assembly conditions and strength conditions. The results show that the assembly contact pressure distribution is not uniform between the layers of the flat extrusion cylinder. The existing flat extrusion cylinder with the inner hole size of 850mm × 250mm has the maximum working internal pressure of 500MPa. Hole size changed to 850mm × 320mm, with the appropriate assembly interference, the maximum allowable working pressure up to 600MPa.