摘要
采用基于流构耦合的有限元方法模拟了管道内三维水锤现象发生的过程及管壁的动态响应。在考虑流体与管道结构体相互作用的基础上,通过任意拉格朗日欧拉法(ALE)仿真分析和确定了管壁最大变形发生在距管末端约1/3管径处,最大变形滞后于水锤波到达时刻。进一步研究发现,在管壁三维动态应力中,周向应力起主要作用,并且与水锤压力波的周期具有较强的相关性。
The finite element analysis（FEA） based on fluid-structure interaction（FSI） is applied in simulating the three-dimensional water hammer in the pipe.The FSI is achieved through the Arbitrary Lagrangian Eulerian（ALE） method.The results of finite element model are consistent with that of one-dimensional classical model.The model and method used in this research are confirmed.The maximum breathing deformation and the dynamic stresses in pipe wall are created at a significant time after the wave front has passed.The maximum deformation does not occur at either the wave front,or near the fixed ends of the pipe,but occurs about one-third of a pipe diameter away from the end.Among the dynamic stresses in pipe wall,the hoop stress is dominant in the effective stress and has the same period with water pressure wave.Finally,the simulation and analysis carried in this paper show the correctness and the affectivity of the proposed method.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2010年第2期33-36,42,共5页
Nuclear Power Engineering
关键词
水锤
三维仿真
流构耦合
动态应力
Water hammer
Three-dimensional simulation
Fluid-structure interaction
Dynamic stress
