Abstract: Aiming at the problems that stiffness enhancement effectiveness of traditional reinforcing methods such as intersecting parallels stiffener was not always optimal in complex thin-walled parts, a stiffness enhancement method for complex thin-walled parts was proposed. Bionic principle of Victoria Warren vein layout was explored based on main stress field model, and an optimization method for lightweight stiffness enhancement of complex thin-walled parts driven by principal stress field was proposed. Experimental results show that the specific stiffness of the complex thin-walled parts generated by this method increases by 33% when mass of the structure is almost equal to that of the traditional intersecting parallels stiffeners.

Key words: thin-walled structure, principal stress line(PSL), biomimetic structure with high stiffness, rib-shell structure, 3D printing

摘要： 针对传统井字形加强筋等加强方式在复杂薄壁件的刚度增强效果并不总是最优的问题，提出了一种复杂薄壁件的刚度增强方法。探究了基于主应力场模型的王莲筋脉布局的仿生原理，提出了主应力场驱动的复杂薄壁件轻量化刚度增强优化方法。实验结果表明，与井字形加强筋结构相比，结构质量基本相同时，该方法生成的复杂薄壁件的比刚度增大33%。

关键词: 薄壁结构, 主应力线, 高刚仿生结构, 肋壳结构, 三维打印