现代计算机(专业版)
現代計算機(專業版)
현대계산궤(전업판)
MODERN COMPUTER
2014年
2期
37-41
,共5页
颗粒模拟%PCISPH%摩擦力%临界密度
顆粒模擬%PCISPH%摩抆力%臨界密度
과립모의%PCISPH%마찰력%림계밀도
Granular Simulation%PCISPH%Frictional Force%Critical Density
在现实动画中,固体、液体和颗粒材料结合上力学性质是对算法设计的重要挑战。提出一种考虑到粒子之间的摩擦力的PCISPH方法,即F-PCISPH,用于模拟固体颗粒材料。颗粒在运动的过程中,除了受到压力、重力、粘力等外力外,颗粒与颗粒之间还存在不可忽略的摩擦力。在确定压力之后计算摩擦力,计算其对粒子流加速度产生的影响,并提出临界密度概念来判断粒子流密度是否小于临界密度,以保证颗粒材料能顺利流动。实验证明F-PCISPH方法和原PCISPH方法同等渲染效率下,程序效果更加逼真。
在現實動畫中,固體、液體和顆粒材料結閤上力學性質是對算法設計的重要挑戰。提齣一種攷慮到粒子之間的摩抆力的PCISPH方法,即F-PCISPH,用于模擬固體顆粒材料。顆粒在運動的過程中,除瞭受到壓力、重力、粘力等外力外,顆粒與顆粒之間還存在不可忽略的摩抆力。在確定壓力之後計算摩抆力,計算其對粒子流加速度產生的影響,併提齣臨界密度概唸來判斷粒子流密度是否小于臨界密度,以保證顆粒材料能順利流動。實驗證明F-PCISPH方法和原PCISPH方法同等渲染效率下,程序效果更加逼真。
재현실동화중,고체、액체화과립재료결합상역학성질시대산법설계적중요도전。제출일충고필도입자지간적마찰력적PCISPH방법,즉F-PCISPH,용우모의고체과립재료。과립재운동적과정중,제료수도압력、중력、점력등외력외,과립여과립지간환존재불가홀략적마찰력。재학정압력지후계산마찰력,계산기대입자류가속도산생적영향,병제출림계밀도개념래판단입자류밀도시부소우림계밀도,이보증과립재료능순리류동。실험증명F-PCISPH방법화원PCISPH방법동등선염효솔하,정서효과경가핍진。
Combining mechanical properties of solids and fluids, granular materials pose important challenges for the design of algorithms for realis-tic animation. Presents a simulation algorithm which is used to simulate the solid granular materials, with considering the friction force be-tween the particles based on PCISPH, namely F-PCISPH. In the process of movement, the friction force between particles can't be ig-nored, except for under pressure, gravity, and viscous force. First, computes the friction force after confirming the pressure, then calculates the influence of particle acceleration and presents the concept of critical density, judge granular flow density is less than the critical den-sity to make sure granular materials can flow smoothly. Experiments prove that the F-PCISPH method has a more realistic program effect compared with the original PCISPH method under the same rendering efficiency.