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通过研究大豆秸秆的力学性能,为大豆收获机、秸秆切割机、残膜回收机等机具的设计提供必要的基础参数数据。采集相同时节的豆秸秆,利用真空干燥箱测定豆秸秆含水率,在万能材料试验机上对大豆秸秆进行剪切、弯曲特性等试验研究,获得了在相同含水率下不同部位和不同加载速度的大豆秸秆的剪切和弯曲力学特性。结果表明:相同加载速度下,根部的剪切应力和弯曲应力比中部和顶部所需的力大;在不同加载速度下,加载速度越大,所需剪切力越小,弯曲力越大。试验所获得的数据,可用于大豆秸秆粉碎装置的设计与研发。
By studying the mechanical properties of soybean straw, the necessary basic parameters data are provided for the design of machines such as soybean harvester, straw cutter and residual film recovery machine. The soybean stalks of the same season were collected, the moisture content of bean stalks was measured with a vacuum oven, and the shear and bending properties of soybean stalks were tested on a universal testing machine. The results showed that soybeans with different parts and loading rates Shear and bending mechanical properties of straw. The results show that under the same loading speed, the shear stress and bending stress at the root are larger than those at the middle and top. At different loading speeds, the higher the loading speed, the smaller the required shear force and the larger the bending force. The data obtained from the experiment can be used in the design and development of soybean straw pulverizing equipment.