摘要
介绍一种新的有限元-光滑粒子流体动力学耦合算法.通过将SPH法中的粒子固连到单元边界上实现有限元计算与SPH计算的耦合,粒子可以连接到单元边界上的任意点,且一条单元边界可以与多个粒子连接,耦合界面处粒子分布与单元分布无相互限制.应用该算法模拟应力波传播和高速冲击问题.结果表明,算法在应力波传播计算中具有良好的精度,在高速冲击问题中计算精度与SPH法相近的,而计算效率大大提高.
A coupling algorithm of finite element（FE） and smoothed particle hydrodynamics（SPH） is introduced.It couples FE calculation with SPH calculation by attaching particles to element segments.In the algorithm,a particle can be fixed to an arbitrary position of an element segment and an element segment can be attached to many particles simultaneously.This makes arrangements of particles and elements at the coupling interface free.The algorithm is applied to simulate stress-wave propagation and high-velocity impact problems.It shows that the algorithm has good accuracy in simulation of stress-wave propagation.In high-velocity impact problems it achieves nearly same accuracy with higher efficiency compared with pure SPH algorithms.
出处
《计算物理》
EI
CSCD
北大核心
2011年第2期219-224,共6页
Chinese Journal of Computational Physics
基金
国家自然科学基金(10902038)
教育部长江学者与创新团队发展计划(531105050037)
汽车车身先进设计制造国家重点实验室自主课题(60870003)资助项目
