籽瓜的力学特性研究及其有限元分析  

Study on mechanical characteristics of seed watermelon and its finite element analysis

作　　者：牛旭东 吴劲锋[2,3] 陆祥辉 潘会平 

机构地区：[1]兰州兰石能源装备工程研究院有限公司,兰州市730314 [2]甘肃农业大学工学院,兰州市730070 [3]甘肃靖远银农籽瓜科技有限公司,甘肃靖远730600

出　　处：《中国农机化学报》2017年第5期12-16,共5页Journal of Chinese Agricultural Mechanization

摘　　要：籽瓜的力学特性对减少籽瓜贮运损失和设计相关机具等具有重要意义。通过对籽瓜进行压缩试验,测得其力—位移曲线,得出在相同加载速率下,籽瓜在横、纵向压缩时的宏观结构破坏所对应的破裂力分别为859N和1 189N;采用差分法计算出籽瓜横纵向的破坏强度分别是2.02×104Pa和2.97×104 Pa;对籽瓜皮进行拉伸试验,得到籽瓜皮横、纵向拉伸时的弹性模量分别为3.41×106 Pa和1.92×106 Pa。运用SolidWorks Simulation建立籽瓜的力学模型,比较籽瓜受力的试验值和仿真值,验证仿真数值解的可行性,为籽瓜的贮藏、运输和加工等提供理论依据。Mechanical characteristics of seed watermelon are important to decrease storage and transportation loss and related machinery de- sign. Curve of force and displacement was measured with compression experiments, which indicate that the rupture forces of transverse and longitudinal compression are 859N and 1 189N respectivcly the breaking strength was calculated with difference method, and results of trans- verse and longitudinal direction are 2.02 x104 Pa and 2.97 x104 Pa the elastic modulus of these two directions are 3.41 x 106 Pa and 1.92 N 106 Pa in tensile test of seed watermelon pericarp. Mechanical model of seed watermelon was established by using SolidWorks Simulation, ex- perimental value and simulation value were compared, and then, feasibility of the numerical simulation was verified. This study can provide theoretical basis for storing, transporting, processing and other processes of seed watermelon.

关 键 词：力学特性 弹性模量 仿真 籽瓜 

分 类 号：S642.9[农业科学—蔬菜学]