农业工程学报2012，Vol.28Issue(z2)：125-133,9.DOI:10.3969/j.issn.1002-6819.2012.z2.022
纵向载荷下作物茎秆“挠曲线”的变化特征测试与分析
Measurement and analysis on “deflection curve” variation characters of crop-stem under axial loading
摘要
Abstract
Taking “non-ideal column” as mechanical model of the crop stem,crop-stem deflection and the relationships between influencing factors of crop-stem lodging were analyzed under axial loading with mechanical theories.The “deflection curve” for stems of three wheat cultivars under different axial loadings were measured with a simple equipment,then relative testing data was analyzed scientifically.The results indicated that shape changing of crop-stem deflection curve was caused by many factors and coordinates of “deflection curve” had the obvious physical meaning,was easy to measure and simple to operate.The coordinates of “deflection curve” could be used to evaluate the lodging resistance.In this article,its reasonability to evaluate lodging resistance was proved both theoretically and experimentally.This research further provides references for crop lodging resistance research and related agricultural machine designing.关键词
农业机械/作物/力学/茎秆/非完善压杆/纵力弯曲/挠曲线/抗倒伏Key words
agricultural machinery/ crops/ mechanics/ stem/ non-ideal column/ buckling/ deflection curve/ lodging resistance分类
农业科技引用本文复制引用
吴晓强,佘跃辉..纵向载荷下作物茎秆“挠曲线”的变化特征测试与分析[J].农业工程学报,2012,28(z2):125-133,9.基金项目
Supported by Crops Breeding Research Program of Sichuan Province,China (2011YZGG4-6),"Science and Technology Supporting"Program of Sichuan Agricultural University(2011). （2011YZGG4-6）
