基于流固耦合的风荷载作用下声屏障强度分析

Strength Analysis of Noise Barrier under Wind Load Based on Fluid-structure Interaction

摘要:

为了解道路上风荷载作用下声屏障周围的流场、所受风压、结构强度等情况，采用流固耦合分析方法对声屏障进行强度分析。采用单向流固耦合技术，首先建立声屏障流场模型，采用有限体积法求解稳态不可压流体湍流方程，分析流场计算结果，并提取流场中声屏障表面的风压数据；然后建立声屏障有限元模型，依次施加重力、风压进行静力计算，对声屏障强度进行校核。结果表明：受验模型的声屏障立柱、基础连接、螺栓均满足强度要求，并且采用单向流固耦合分析方法对声屏障进行风荷载条件下的强度分析具有可行性。

关键词:流固耦合;风荷载;声屏障;强度分析

Abstract:

In order to understand the flow field, the wind pressure and the structural strength of noise barrier on road under the wind load, the strength of noise barrier is analyzed by the fluid-structure interaction method. The one-direction fluid-structure interaction technology is used. First, a flow field model of noise barrier is built. The turbulence equation of steady state incompressible fluid is solved by finite volume method. The calculation result of flow field is analyzed. The wind pressure data of noise barrier surface in the flow field are extracted. Then, the finite element model of noise barrier is built. Gravity and wind pressure are applied in order to calculate the static force. The strength of noise barrier is checked. The results show that the posts, foundation connection and bolts of the tested noise barrier all meet the strength requirements, which explains that the use of one-direction fluid-structure interaction analysis method has the feasibility for the strength analysis of noise barrier under the wind load condition.

Key words:fluid-structure interaction; wind load; noise barrier; strength analysis