基于竹子生物特征的维管束结构塔筒力学特性研究

Study on mechanical characteristics of vascular bundle tower based on bamboo biological characteristics

竹子具备较强的生存能力,这与其自身独特的生物特征紧密相关.从宏观角度对竹子结构进行研究可以发现,沿竹身非均匀分布的竹节是竹子最为显著的结构特征,竹节可提高竹材轴向和径向的抗压能力.进一步从微观角度对竹节维管束结构进行研究可以发现,竹节维管束是竹节的主要承载结构.考虑到竹子和风力机塔筒的相似性,将竹节维管束生物特征应用至风力机塔筒结构设计中,进行仿竹节维管束塔筒设计,并在极端工况下对仿竹节维管束塔筒和原塔筒进行静力学对比分析.结果表明,仿竹节维管束塔筒相比原塔筒最大响应应力减少了22.12%,最大响应位移减少了9.02%,仿竹节维管束结构使仿竹节维管束塔筒的强度和刚度得到了提升.研究结果可为竹节微观生物结构在实际工程应用方面提供理论依据.

Bamboo has a strong survival ability,which is closely related to its unique biological structure.From a macroscopic perspective,the non-uniform distribution of bamboo nodules along the bamboo body is the most significant structural feature of bamboo,and the nodules increase the axial and radial compressive capacity of the bamboo material.The vascular bundle of bamboo nodes was further investigated from the microscopic point of view,and it was found that the vascular bundle of bamboo nodes was the main load-bearing structure of bamboo nodes.In consideration of the similarity between bamboo and wind turbine tower,the bamboo vascular bundle structure was applied to the tower structure to design the bamboo vascular bundle tower,and the static analysis of the bamboo vascular bundle tower and the conventional tower was carried out under the extreme working conditions.The results show that the maximum response stress of the bamboo vascular bundle tower is reduced by 22.12%and the maximum response displacement is reduced by 9.02%compared with the conventional tower,meaning that the bamboo vascular bundle structure improved the strength and stiffness of the bamboo vascular bundle tower.This study provides a theoretical basis for the practical engineering application of bamboo microstructure.