基于有限元的大叶杨树叶运动模拟

Computer Animation of Swaying Leaves Based on Finite Element

对风场中树木的动态模拟研究,大多数都忽略了树叶的运动,最多也只是描述了其运动形式。采用有限元方法来分析其真实物理运动形态,提出了使用有限元中壳体分析方法来研究大叶杨叶面结构。计算和模拟了其三种运动状态,从而得到一片树叶真实的物理运动过程。同时提出以簇为单位分析一段树枝上树叶的整体运动,这样能够简化计算,又不失真实地反映其运动过程。

The study on dynamic simulation of trees in the air field mostly neglects the movement of leaves, on ly describes movement forms of leaves. The Finite Element Method （FEM） is adopted to analyze the real and phys ical movement forms, and put forward a new approach of shell analysis which is included in FEM to research the structure of broad leaf, and simulate three movement forms. Thus the real and physical movement of a leaf is drawn. At the same time, a method of leaf Cluster as basic unit is presented to study leaves of overall movement. The method can not only simplify calculative process, but also can faithfully represent the movement process.