铁道标准设计2018，Vol.62Issue(3)：1-6,6.DOI:10.13238/j.issn.1004-2954.201705080002
基于动网格的铁路沿线孔板式沙障流固耦合数值模拟
Numerical Simulation of Fluid Solid Coupling of Hole-plate Sand Barrier Based on Dynamic Mesh
摘要
Abstract
The hole-plate sand barrier is a new porous and fence structure with very good effect on wind-sand resistance, but the flow field characteristics and mechanical characteristics of the hole-plate sand barrier under the wind load must be taken into account in its application. Fluid solid coupling numerical simulation of hole-plate sand barrier is conducted to analyze the influence of the characteristics of flow field around the sand barrier with the changes of pore size when the fixed porosity is constant on the displacement and stress of the sand barrier, and when the porosity is constant and the pore size changes. The relevant laws and characteristics are summarized. Research results conclude that there is no eddy zone after the sand barrier with different pore sizes, the deceleration zone increases with the decrease of the pore size and the deceleration effect is thus enhanced;the change of the pore size has no effect on the stress and deformation displacement distribution of the sand barrier, but has effect only on the value;the maximum force position of sand barrier pillar is 4.5cm away from the bottom of the pillar and the smaller the aperture, the greater the maximum value; when wind first contacts with the sand barrier it generates"impact effect",and the maximum value of"impact effect"is the maximum value of sand barrier deformation and also the most dangerous value; the smaller the aperture, the greater the maximum value of the"impact effect",and also the larger the displacement value in the steady state.关键词
孔板式沙障/数值模拟/流固耦合/动网格/受力分析Key words
Hole-plate sand barrier/Numerical simulation/Fluid solid coupling/Dynamic mesh/Stress analysis分类
交通工程引用本文复制引用
智凌岩,程建军,王连,辛林桂..基于动网格的铁路沿线孔板式沙障流固耦合数值模拟[J].铁道标准设计,2018,62(3):1-6,6.基金项目
国家自然科学基金应急管理项目(51641808) （51641808）
国家自然科学基金地区项目(51568057,51268050) （51568057,51268050）
