文献类型：期刊文献

中文题名：不同曲率情况下的液压管道流固耦合特性仿真研究

英文题名：Simulation for fluid-solid interaction characteristics of hydraulic pipes with different curvatures

作者：周知进 何星 戴哲冰

第一作者：周知进

机构：[1]贵州理工学院机械工程学院;[2]湖南科技大学机电工程学院

第一机构：贵州理工学院机械工程学院

年份：2017

卷号：36

期号：5

起止页码：214-220

中文期刊名：振动与冲击

外文期刊名：Journal of Vibration and Shock

收录：CSTPCD;;EI(收录号：20171803628445);Scopus(收录号：2-s2.0-85018352450);北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家自然科学基金(51479073)

语种：中文

中文关键词：管道;布局;流固耦合;曲率;应力

外文关键词：pipe ; layout; fluid-solid interaction; curvature; stress

摘要：管道布局影响流体流动特性与管道应力分布。利用有限元方法对不同曲率情况下管道的流固耦合特性进行了分析,研究了流固耦合作用对不同曲率管道位置等效应力的影响。研究结果表明:流体对弯曲管道在弯曲壁面产生额外的作用力导致管道发生变形,且角度的改变会导致两端进出口位置应力发生较大的波动;管道曲率变化对弯管在弯曲附近位置应力影响较大,随着弯曲角度的增加管道弯曲处应力先减小后增大再减小,而内侧和两侧的应力改变幅度不同;管道曲率半径的改变会影响管道的受力分布。通过分析得出管道布局按R30(R/d=1.5)相比其他管道的模型布局更为合理的结论。
The layout of pipes has an effect on flow ing characteristics of fluid and their stress distribution. Fluid - solid interaction characteristics of fluid in pipes with d iffe re nt curvatures were analyzed with the finite element method. The effects of fluid-solid interact ion on the equivalent stress of pipes with diffe rent curvatures and positions were studied. The results were shown that fluid acts an additional force on the in ternal surface of bent pipes to cause pipes＇ deformation and bending angle changes cause stress fluctuation at both pipes’ in let and out let; moreover, the changes of pipe curvatures have a larger effect on bent pipes＇ stress near the bending position; the pipe bending stress decreases at first, then increases and decreases again with increase in bending angle of pipes whereas the changing levels of stresses on in ner side and both sides are different; the change of pipe curvature radius affects the stress distribution of pipes; the layout of pipes according to K30 （R/d = 1.5） is more reasonable than others.