梨动力学特性有限元分析  

Analysis of Dynamic Behaviour of Pear with Finite Element Method

作　　者：宋慧芝[1] 王俊[1] 陈琦峰[1] 严志权[1] 

机构地区：[1]浙江大学生物系统工程与食品科学学院

出　　处：《农业机械学报》2005年第6期61-64,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(项目编号:30170533)

摘　　要：应用有限元方法分析了梨的动力学特性,提出一种新的接近实体的图像处理建模方法,建立了非对称非球形梨的几何模型,为计算梨自由振动时的固有频率和振型,分析其几何形状、材料特性和动态行为之间的相关性,为果品物理特性的进一步试验与理论研究提供依据。The variation of the dynamic characteristics of a pear was investigated by using finite element simulations. The new image processing techniques has been used to obtain the unsymmetrical and un-spherical geometrical model of a pear. The dynamic behavior of this type of pear and the correlation of its behavior with geometrical characteristics and material characteristics has been investigated by using a numerical modal analysis. The results showed that the eigenfrequency increased as the pear Young's modulus increasing, while decreased as the pear density decreasing, and increased as the pear volume increasing. It provided a foundation for the further investigation of the physics characteristic of fruits and vegetable by using finite element simulations.

关 键 词：梨 动力学特性 非对称非球形模型 有限元分析 图像处理 坚实度无损检测 

分 类 号：S661.2[农业科学—果树学] TP391.41[农业科学—园艺学]