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...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。展开更多
Dragonflies are excellent flyers among insects and their flight ability is closely related to the architecture and material properties of their wings. The veins are main structure components of a dragonfly wing, which...Dragonflies are excellent flyers among insects and their flight ability is closely related to the architecture and material properties of their wings. The veins are main structure components of a dragonfly wing, which are found to be connected by resilin with high elasticity at some joints. A three-dimensional （3D） finite element model of dragonfly wing considering the soft vein joints is developed, with some simplifications. Passive deformation under aerodynamic loads and active flapping motion of the wing are both studied. The functions of soft vein joints in dragonfly flight are concluded. In passive deformation, the chordwise flexibility is improved by soft vein joints and the wing is cambered under loads, increasing the action area with air. In active flapping, the wing rigidity in spanwise direction is maintained to achieve the required amplitude. As a result, both the passive deformation and the active control of flapping work well in dragonfly flight. The present study may also inspire the design of biomimetic Flapping Micro Air Vehicles （FMAVs）.展开更多
文摘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。
基金The authors acknowledge support of the National Natural Science Foundation of China （Grant No. 11572227）.
文摘Dragonflies are excellent flyers among insects and their flight ability is closely related to the architecture and material properties of their wings. The veins are main structure components of a dragonfly wing, which are found to be connected by resilin with high elasticity at some joints. A three-dimensional （3D） finite element model of dragonfly wing considering the soft vein joints is developed, with some simplifications. Passive deformation under aerodynamic loads and active flapping motion of the wing are both studied. The functions of soft vein joints in dragonfly flight are concluded. In passive deformation, the chordwise flexibility is improved by soft vein joints and the wing is cambered under loads, increasing the action area with air. In active flapping, the wing rigidity in spanwise direction is maintained to achieve the required amplitude. As a result, both the passive deformation and the active control of flapping work well in dragonfly flight. The present study may also inspire the design of biomimetic Flapping Micro Air Vehicles （FMAVs）.
