A seventh extra anchor toward the ceiling, not physically connected, is added in order to maximize double curvature along the surface, and therefore embedding inherent stiffness.

第七个锚朝向天花板而没有物理连接，它的增加使得沿着表面的双曲率最大化，因而嵌入了内在刚度。

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This study investigates the mechanism of both forming process and springback of the draw formed panel with double curvature. The springback is related with the tension strain of the panel surface.

研究了双曲扁壳覆盖件的成形机理及回弹特点，分析了双曲度拉延回弹机理。

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