基于质点-弹簧模型的冰雹打击树叶的模拟方法

Simulation of Hail Impact on Leaves Based on Mass-Spring Model

为了实现有别于布料破碎模拟的冰雹打击树叶过程的模拟,研究并提出了一种应用物理学原理的树叶和冰雹相互作用的真实感动态仿真技术,为后续进一步研究叶脉对叶片受力的影响提供了基础。树叶的破碎是源于冰雹受到地面重力的吸引,在下落时与树叶进行能量的传递,二者之间的交互作用可以利用一种高效的技术很好地模拟。该技术被专门设计用来模拟弹力较小的物体,例如树叶的撕裂。当冰雹与树叶进行交互时,由冰雹速度带来的作用力转换为树叶上的横向和纵向的弹簧力从而导致树叶破碎。实验结果表明,该技术能够高效、真实地仿真冰雹撞击树叶后的作用效果,并且在一定程度上还原冰雹自然灾害的情况。

In order to realize the simulation of the process of hail against the leaves, which is different from the fabric crushing simulation, this paper presents a realistic dynamic simulation technology of the interaction between leaves and hail based on physical theory. It opens up a different area from the cloth tearing simulation and proposes the simulation algorithm of the leaf breaking, which provides the foundation for further research on the influence of leaf veins on leave’s force-bearing capability.The tearing of the leaves is due to the hail being attracted by the gravitation of the ground,transferring the energy of the hail to the leaves, and the interaction between the two can be well simulated by an efficient technique. The technology is specifically designed to simulate the tearing of objects with less elastic forces such as leaves. When hail interacts with the leaves, the forces due to the hail velocity are translated into lateral and longitudinal spring forces on the leaves, causing the leaves to break. Experimental results show that this technique can effectively and realistically simulate the effect of hail impact on leaves and restore the situation of hail disasters.