基于王莲叶脉分布的机床横梁筋板结构仿生优化

Structural bionic optimization of stiffening ribs of a machine tool crossbeam based on giant waterlily vein distribution

利用结构仿生的方法对 Lin MC6000型咙门加工中心横梁的筋板结构进行了优化设计。通过对王莲叶脉构型规律的分析,提出了3种仿生构型并利用 Optistruct 软件进行了有限元仿真验证。结果表明,相对于传统的平行均布筋板,最优仿生型筋板的结构比刚度提高了17.36%,前4阶固有频率平均提高7.39%,体现了材料的优化分布和最大结构效能,并总结出横梁内部筋板设计的仿生学规律。这为突破机床构件的传统设计思路、实现结构轻量化提供了一种新方法。

A structural bionic method was used for the optimal design of stiffening ribs of Lin MC6000 gantry machining center crossbeam. Three bionic rib structures were proposed by mimicking the vein distribution principles of a giant waterlily, and the Optistruct software was applied to the simulation test of the structures with the finite element method. The results indicated that, compared with the traditional parallel-rib structure, the structural specific stiffness of the optimal bionic structure increased by 17.36% and the first four natural frequencies increased by 7.39% on average, showing an optimal material distribution and the maximum structural efficiency. The bionic principles were concluded for stiffening ribs design of crossbeam, and a new solution was found for updating traditional design concepts and achieving lightweight structures.