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。

This study investigates the mechanism of both forming process and springback of the draw formed panel with double curvature.

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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。

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.

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薄壳空间结构具有很多优点，我国在水工闸门中使用双曲扁壳结构的历史已有37年，但尚未见到采用橡胶布面板的。

Though 37 years passed after the double arch and flat shell structure applied in the water power engineering, the rubber canvas faceplate has never been used.

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