基于力学模型的小麦腊熟期倒伏的风速研究

随着小麦产量的提高袁其倒伏的可能性也增大。因此，解决小麦的倒伏问题对提高小麦产量具有重要意义。将腊熟期小麦茎秆简化为刚/弹性材料，研究了腊熟期小麦茎秆在风载作用下应力变化的基本规律袁运用振动理论建立了小麦单茎穗重在风载作用下的抗倒伏力学模型遥最后，利用2013年的试验数据，基于该模型计算出了周麦18茎秆和矮抗58茎秆的抗倒伏风速，计算结果与已有文献数据较吻合，表明该模型可为研究小麦的抗倒伏提供一定的理论依据。

Study on lodging resistance wind speed of wheat based on mechanics model

With the increase of wheat yield, the possibility of wheat lodging increases. Therefore, solving the problem of wheat lodging resistance has great significance for the increase of wheat yield. Simplifying wheat stem at wax ripeness as rigid/elastic material, its basic law of stress under the wind load was studied. The lodging resistance mechanical model of deadweight of wheatear under the wind load was established by using vibration theory. Finally, based on this model, the lodging resistance wind speed of Zhoumai 18 and Aikang 58 were calculated by the experimental data in 2013. The calculation results of lodging resistance wind speed agreed with the data from literature, which indicated that this model could provide certain theoretical basis for lodging resistance of wheat.