项目名称： 基于多部件协同耦合作用的桑条切割部位损伤机理研究

项目编号： No.51505266

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 宋占华

作者单位： 山东农业大学

项目金额： 21万元

中文摘要： 我国作为世界第一大蚕桑产业生产国，现代化蚕桑产业的发展亟需实现桑条机械化收获。但桑条在收获机械各工作部件耦合作用下容易在切割部位产生损伤，导致桑叶产量下降，而现有桑条切割技术及装备无法从根本上解决桑条机械化收获过程中存在的切割损伤问题。在申请人前期对棉花秸秆切割特性研究的基础上，项目以桑条为研究对象，从桑条在收获机械各部件协同耦合作用下完成切割收获入手，在桑条生物学和物理机械特性研究基础上，运用联合仿真和高速摄影技术，探讨桑条切割部位在不同形式载荷作用下的应力应变规律与损伤表达形式，并揭示桑条切割部位损伤产生的机制，进一步研究桑条在多部件协同耦合作用下的空间姿态运动变化规律与切割部位损伤表达形式以及两者之间的关系，从而阐明多部件协同耦合作用下桑条切割部位损伤机理，并提出相应的抑制策略，解决桑条在机械化收获过程中切割部位易损伤的难题，为新型低损伤桑条收获机械的研发提供理论依据和技术支持。

中文关键词： 桑条机械化收获；物理机械特性；耦合作用；切割损伤；损伤机理

英文摘要： China is the largest producer of sericulture industry in the world, in order to meet the demand of the development in modern sericulture industry, the mulberry branch must be harvested with the mechanical harvester in practice. However, the cutting damage of the stool often occurs during harvesting with a reaper, resulting from the multi-component coupling effect. The cutting damage would cause the mulberry leaf yield decline. On the other hand, no cutting damage of mulberry stool with the existing mechanical harvesting technology and equipment could not be easily achieved. According to the previous research results on cutting cotton stalk The mulberry branch is the object in this research. On the basis of the researching results in biology, physical and mechanical properties of the mulberry branch, the relationship between the stress and the strain of the mulberry branch subjected to the different kinds of loads and the form of the cutting damage would be exploded by using co-simulation and high-speed photography under the multi-component synergy effects during mechanical harvesting. Meanwhile, the cutting damage mechanism of mulberry branch would be understood. Furthermore, by researching the relationship between the space attitude change of the mulberry branch and the cutting damage form of the mulberry stool under the coupling effect of the multi-component of the harvester during mechanical harvesting, the cutting damage mechanism of mulberry branch under the coupling effect of the multi-component of the harvester would be explained and the suppression strategy for the cutting damage would be put forward. The problems in the cutting damage of stool during mechanized harvesting of mulberry branch would be solved. The research results of this project will give some theoretical and technology advices for developing a new harvester of mulberry branch with lower cutting damage of mulberry stool in China.

英文关键词： mechanical harvesting for mulberry branch;physical and mechanical properties;coupling effect;cutting damage;damage mechanism