摘要
对小麦茎秆进行受力分析,运用挠曲线近似方程的叠加,势能驻值原理,建立了茎秆在穗重和风载双重作用下茎秆抗倒伏的精确模型,并给出临界风力的具体表达式.结果表明:茎秆的高度越高,承载的临界力越小,但并不是简单的反比例关系;抗弯刚度与倒伏临界力成显著的正线性相关;单穗重的增加也会降低抗倒伏临界力.
Mathematical model for wheat stem lodging resistance is considered during its later growth period. Through the mechanical analysis of wheat stalk,by applying adding approximate equation of deflection curve and principle of resident potential energy,a accurate lodging resistance model under the ear weight and wind is established.Moreover,the formula of critical force is given.Results indicated that：relationship between wheat stem height and the critical force is not simple inverse proportion;there is a notable positive linear correlation between bending rigidity and critical force;single spike weight increased will also reduce the critical force of lodging resistance.
出处
《河南科技学院学报（自然科学版）》
2013年第6期33-36,共4页
Journal of Henan Institute of Science and Technology(Natural Science Edition)
基金
国家科技支撑计划(2011BAD07B02)
"973"国家重点基础研究发展计划项目(2012CB114300)
河南省科技攻关计划项目(132102110120)
关键词
小麦茎秆
抗倒伏模型
挠度曲线
临界力
wheat stem
lodging resistance model
deflection curve
critical force
