三维空间曲面结构风荷载的数值模拟

李清雅;叶继红

振动与冲击 ›› 2009, Vol. 28 ›› Issue (4) : 121-126,.

PDF(3303 KB)
PDF(3303 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (4) : 121-126,.
论文

三维空间曲面结构风荷载的数值模拟

  • 李清雅1,2 叶继红1
作者信息 +

Numerical Simulation of Wind Pressure on Spatial Structures

  • Li Qingya, Ye Jihong
Author information +
文章历史 +

摘要

本文运用计算流体动力学技术,基于FLUENT 流体动力学数值模拟平台,采用雷诺平均法和大涡模拟技术,对球壳、柱面、悬链面、菱形马鞍面及椭圆双曲抛物面五类结构进行了定常、非定常流场的模拟计算。使用自回归模型的线性滤波法生成了脉动风速的时间序列,该脉动风速的时间序列很好地满足了预先设定的脉动风速谱和空间相关性要求,进而将其代入到实际计算的边界条件当中。将五类空间曲面结构表面风压的模拟计算结果与风洞试验结果定量比较:稳态计算得到的平均风压数据与风洞试验结果吻合理想,非稳态计算得到的脉动风压数据与试验结果差别稍大,其中正高斯曲面模拟精度高于负高斯曲面。

Abstract

Based on FLUENT soft platform with Reynolds Stress Model (RMS) and Large Eddy Simulation (LES), the wind pressure distributions on the structures such as dome, cylinder, catenoid, saddle and elliptic hyperbolic paraboloid are obtained in steady and unsteady numerical simulation. The auto-regressive model is adopted to generate the time history of pulse wind speed. The time series satisfy the target spectrum and spatial correlations. Then the time series of pulse wind speed are imposed on the inflow boundary of omputational zone. The steady numerical results conform to the experimental data much at one. The unsteady numerical results match the experimental data a little worse, and the simulation precision of positive Gaussian structures is better than that of negative Gaussian structures.

关键词

计算流体动力学 / 数值模拟 / 空间结构 / 平均风压 / 脉动风压

Key words

Computational Fluid Dynamics (CFD) / numerical simulation / spatial structures / mean wind pressure / pulse windpressure

引用本文

导出引用
李清雅;叶继红. 三维空间曲面结构风荷载的数值模拟[J]. 振动与冲击, 2009, 28(4): 121-126,
Li Qingya;Ye Jihong. Numerical Simulation of Wind Pressure on Spatial Structures[J]. Journal of Vibration and Shock, 2009, 28(4): 121-126,

PDF(3303 KB)

Accesses

Citation

Detail

段落导航
相关文章

/