基于完全拉格朗日粒子方法的物理动画模拟  

Realistic Simulation of Physical Animation Based on Lagrangian Particle Method

作　　者：邵绪强[1] 景筱竹 刘书刚[1] SHAO Xuqiang;JING Xiaozhu;LIU Shugang(School of Control and Computer Engineering, North China Electric Power University, Baoding Hebei 071003, China)

机构地区：[1]华北电力大学控制与计算机工程学院,河北保定071003

出　　处：《图学学报》2017年第3期297-302,共6页Journal of Graphics

基　　金：国家自然科学基金项目(61502168);中央高校基本科研业务费专项资金(2015MS126);河北省自然科学基金项目(F2016502069)

摘　　要：自然界中不同类型物体和行为的真实感模拟是物理动画的重要内容,但实现基于统一数值方法的模拟仍是研究难点。基于光滑粒子动力学方法和连续介质力学物理模型,提出一种基于完全拉格朗日粒子方法的物理动画模拟算法,模拟刚性物体、弹性物体和不可压缩流体的动力学行为。此外,结合固体表面粒子的自适应采样方案和相对贡献计算方案,提出一种稳定的固流交互算法。实验结果表明,该方法适合于虚拟环境中不同类型物体运动和交互的统一建模和模拟。Realistic simulation of different types of objects in real world is an important task of physical animation.However,it is still hard to realize simulating based on a unified numerical method.Based on smoothed particle hydrodynamics and continuum mechanics,we propose a unified particle-based method to simulate physical animation,and realistically simulate rigid objects,elastic objects and incompressible fluids.Moreover,by combining the adaptive sampling scheme and relative contribution computation of surface particles of objects,we present a stable fluid-solid coupling algorithm.The results demonstrate that our method is suitable for the unified modeling and simulation of different objects in virtual scenes.

关 键 词：物理动画 粒子方法 弹性变形 刚体 流体 固流交互 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]