自然风作用下高速铁路声屏障的数值模拟研究

Numerical simulation on the noise barrier of high-speed railway under the action of natural wind load

基于三维、定常、不可压缩、粘性流体的RANS方程和κ—ε两方程模型,运用计算流体力学软件Fluent,对在列车风致脉动力与自然风荷载联合作用下的高速铁路声屏障进行数值模拟,分析声屏障表面所受复合载荷的叠加方式,依据仿真结果拟合出的复合载荷的理论计算公式具有较高的可靠性。

Based on the 3D,constant,incompressible and viscous fluid RANS equations and κ-ε two equations model,this paper runs a numerical simulation on the noise barrier of high-speed railway under the action of train-induced impulsive wind pressure and natural wind load by the CFD software Fluent.It analyses the compound mode of composite loads that the noise barrier bears,based on the results,it fits the theoretical formula of the composite loads which has higher reliability.