植物叶片粗枝网络结构多工况模拟分析  

Simulation of the Rough Network Structure of Plant Leaves in Multiple Loading Cases

作　　者：刘旺玉[1] 刘希凤[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《科学技术与工程》2009年第23期6965-6970,6996,共7页Science Technology and Engineering

基　　金：国家自然科学基金(50675067);广东省自然科学基金(05006496)资助

摘　　要：采集三种新鲜植物叶片标本,通过拍照式三坐标测量仪获取植物叶片的坐标数据点云,在ANSYS中建立叶片的粗枝网络模型;并以三种植物叶片的粗枝网络模型为研究对象,对叶片在自然环境中受雨、风等载荷影响进行数值模拟。总结了植物叶片受载时应力分布及变形规律,发现不同类型叶子在雨和风的分别作用下最大等效应力均发生在主脉上,变形除了沿载荷方向的剪切弯曲外,还表现为绕主脉的扭转。Three species of fresh plant leaves were picked and the coordinate clouding data of these plant leaves was got by the photo-coordinate measuring machine.Then the data of the outlines and veins of plant leaves were selected and the rough network parametric models of plant leaves were built in ANSYS.With the rough network models of three species of plant leaves as the research object,numerical simulations were carried out for the leaves affected by rain or wind load in the natural environment.The law of stress distribution and deformation of leaves by main mechanical load was summarized. It is that the maximum von mises stress occurs in the central vein and the deformation consists of the torsion around the central vein besides shear and bending for different kinds of leaf.

关 键 词：植物叶片 叶脉 数值模拟 三坐标测量仪 

分 类 号：Q142.9[生物学—生态学] TP273.2[生物学—普通生物学]