锻压技术

网格壁板滚弯成形结构优化和试验验证

英文标题：Structure optimization and experimental verification on integral stiffened panel in roll bending process

作者：郜阳龚雄胡蓝雷湘衡

单位：上海航天设备制造总厂

分类号：V46

出版年,卷(期):页码：2017,42(6):66-69

摘要：

针对新一代运载火箭贮箱网格壁板滚弯成形后直线度为3~4 mm的问题，建立了网格壁板滚弯有限元模型，分析了网格壁板在滚弯过程中的受力特点。网格壁板滚弯成形时上、中、下区域受力不均，成形后各区域延伸量相差6 mm，这是滚弯成形后直线度差的主要原因。设计了高度方向上、下余量区结构优化的网格壁板，通过有限元方法分析了结构优化后的网格壁板，各区域滚弯成形时应力水平接近一致。开展了结构优化后网格壁板的滚弯成形试验验证，结构优化后的网格壁板滚弯成形后直线度在1.5 mm以内。

For the problem of 3-4 mm straightness of the integral stiffened panel after rollbending process in the new generation launch vehicle tank, a finite element model of the integral stiffened panel after rollbending process was established, and the loading features of the integral stiffened panel were analyzed. However, during the rollbending process, the forces acting on the lower, middle and upper areas are distributed unevenly, and the elongation difference of the formed panel is 6 mm, which are the main cause of poor straightness. Then, the integral stiffened panel of the structure optimization along the altitude direction margin area was designed. Furthermore, the optimized structure of the integral stiffened panel was analyzed by the finite element method, and the stress levels from various rollbending areas are closely aligned. Finally, the rollbending test of the integral stiffened panel after structural optimization was carried out, and the straightness is within 1.5 mm.

基金项目：

2016智能制造专项

郜阳（1987-），男，硕士，工程师

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