高速铁路声屏障在列车风致脉动力与自然风荷载下的数值模拟

Numerical Simulation on Noise Barrier of High-speed Railway under Action of Wind-induced Fluctuating Pressure of Train and 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,分析在不同的风向角及风速下,自然风荷载对声屏障所受列车风致脉动力的影响。结果表明:自然风荷载对声屏障所受的脉动峰压影响较大,在对声屏障进行结构静力学设计时必须考虑自然风荷载的影响。

Based on the 3D, constant, incompressible and viscous fluid RANS equations and K -e two-equation model, this paper, by use of Fluent, a software for fluid mechanics calculation, carries out numerical simulation on the noise barrier of high-speed railway under joint action of wind-induced fluctuating pressure of train and natural wind load to analyze, under different values of wind angle and speed, how the natural wind load influences the wind-induced fluctuating pressure applied on the noise barrier. The result shows that natural wind load has a large influence on fluctuating peak pressure, which should be considered in structure static design of noise barrier.