甘蔗叶鞘在弹性剥叶元件作用下破坏高速摄影分析  

Damage of Sugarcane Leaf Sheath under Action of Elastic Leaf-stripping Elements Based on High-speed Photography

作　　者：牟向伟[1] 区颖刚[1] 吴昊[1] 刘庆庭[1] 宋键铭[1] 黄世醒[1] 

机构地区：[1]华南农业大学南方农业机械与装备关键技术省部共建教育部重点实验室,广州510642

出　　处：《农业机械学报》2012年第2期85-89,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50875091);国家甘蔗现代产业体系项目(nycytx-024-01-06)

摘　　要：为了研究整秆式甘蔗联合收获机剥叶过程甘蔗叶鞘在弹性剥叶元件作用下的破坏机理,研制了甘蔗剥叶试验台,利用高速摄像机拍摄了蔗叶的破坏过程,并对图像进行分析。结果表明,甘蔗叶鞘在弹性剥叶元件作用下的主要破坏形式有叶鞘脱落、叶鞘撕裂和叶鞘与茎秆分离。通过建立弹性剥叶元件作用于叶鞘的简化力学模型,结合叶鞘的力学特性分析了蔗叶在弹性剥叶元件作用下的破坏机理。弹性剥叶元件对叶鞘施加的力是破坏叶鞘的主要作用力。叶鞘不同的破坏形式与叶鞘的生长性状和力学特性有关,含水率低于20%干叶鞘的主要破坏形式为叶鞘脱落,含水率为20%～50%的湿叶鞘的主要破坏形式为叶鞘撕裂,含水率大于50%的青叶鞘的主要破坏形式为叶鞘与茎秆分离。In order to study the damage mechanism of sugarcane leaf sheath under the action of elastic leaf-stripping elements in the leaf-stripping process of whole stalk sugarcane harvester,the sugarcane leaf-stripping machine was designed,and the damage process of the leaf sheath was photographed by high-speed photography.By analyzing the pictures,the result showed that three damage forms,the abscission of leaf sheath from stalk,leaf sheath torn and the separation leaf sheath from stalk were found.The damage mechanism under the action of elastic leaf-stripping elements was analyzed based on the construction of simplified mechanical model and mechanical properties of sugarcane leaf sheath.The elastic force applied on the leaf sheath by elastic leaf-stripping elements was the main force to make the leaf sheath damage.The different damage forms had relations with growth character and mechanical property of leaf sheath.When the moisture content of leaf sheath was less than 20%,the abscission of leaf sheath from stalk was the main damage form.And the moisture content ranged from 20% to 50%,leaf sheath torn happened.Also the moisture content was greater than 50%,the separation leaf sheath from stalk appeared.

关 键 词：甘蔗 叶鞘 弹性剥叶元件 破坏 高速摄影 

分 类 号：S225.53[农业科学—农业机械化工程]