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当前位置: 首页 > 文章 > 作物茎秆抗倒性综合评价指标的力学分析 农机化研究 2012,34 (2) 31-37
Position: Home > Articles > Mechanical Analysis Comprehensive Evaluation methods in Crop-stem Lodging Resistance Journal of Agricultural Mechanization Research 2012,34 (2) 31-37

作物茎秆抗倒性综合评价指标的力学分析

作  者：
吴晓强;佘跃辉
单  位：
四川农业大学信息与工程技术学院;四川农业大学农学院
关键词：
作物茎秆;抗倒伏;非完善压杆;挠度指数;转角指数;载荷灵敏度
摘  要：
应用力学理论分析了茎秆"临界力"和各类"倒伏指数",评价作物抗倒性的缺陷和优点;建立了作物茎秆的"非完善压杆"力学模型;用小挠度理论推导出了作物茎秆最大挠度和转角的表达式。通过对该表达式的分析,提出了用茎秆"挠度指数"、茎秆"倾斜指数"以及茎秆"载荷敏感度"作为作物抗倒性的综合评价指标,该指标具有理论分析合理、物理意义明晰、测量方便以及操作简单等优点。同时还给出了切实可行的田间测量方法,为抗倒伏研究和相关农业机械的设计提供参考。
译  名：
Mechanical Analysis Comprehensive Evaluation methods in Crop-stem Lodging Resistance
作  者：
Wu Xiaoqianga,She Yuehuib(a.College of Information and Engineering;b.College of Agriculture,Sichuan Agricultural University,Yaan 625014,China)
关键词：
crop-stem;lodging resistance;non-ideal column;buckling index;slope index;sensitivity to load
摘  要：
In this paper,the deficiencies and advantages of "critical force" of crop-stem and some types of "lodging index" in evaluation methods of lodging resistance were analyzed.The mechanical model of crop-stem under" non-ideal column" was established by applying mechanical theory and methods.The principle of minor buckling were applied to extract the formulas of the buckling and slope,and through analysis of these formulas,"Buckling index","Slope index" and "Sensitivity to Load" were proposed to be the comprehensive evaluation methods in lodging resistance of crop-stem.These indexes have the advantages of reasonable theory analysis,more relevant physical meaning,easier operation of measurement.In addition,effective filed experiment method was put forward in this paper,therefore it could supply a reference for the lodging resistance research and design for the related agricultural machines or implements.

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