Firstly, the theory of fluid mechanics is used to establish a mathematical model of turbulence and explain the operation mechanism of the wind field. The research on fluid mechanics is mainly divided into two parts.
The theoretical basis of the research is fluid mechanics, and the methods of collecting experimental data are wind tunnel experiments and computational fluid dynamics (CFD) simulation experiments. Existing studies have rarely used traffic sign boards as the research object, instead of focusing mainly on objects such as billboards and other buildings. Other experts and scholars have considered studying the characteristics of wind load on the sign board surface. Therefore, improving the wind load resistance of the sign board as much as possible on the original basis is particularly important. However, the optimal design of the sign board structure is limited by the support steel, and the wind load resistance of the sign board is proportional to the cost of the steel. With regards to the influence of the aerodynamic effect on sign boards, a new sign board design scheme was proposed that separates the sign board and the supporting structure. In addition, they considered the effect of large vehicles passing by. Therefore, the wind-load countermeasures applied to sign boards need a scientific and feasible plan.Īiming at the problem of insufficient wind load resistance of traffic sign boards, some experts and scholars analysed the force of the support structure under wind load by optimising the support structure of the sign board. However, the implementation of these measures generally lacks a theoretical basis and relies on the designer's subjective feelings, which often leads to problems, such as structural instability or improper visibility of the sign board and cannot achieve the expected anti-wind load effect. In real-world engineering applications, designers improve the wind load resistance of the sign boards by making holes and slots on these boards. In some coastal areas and flat areas, large-scale guide signs are easily damaged by strong winds, which seriously affects road traffic safety.
#Autodesk cfd drivers#
This study provides decision-makers with useful information for installing traffic signs in areas affected with strong winds, thereby improving the wind resistance of traffic signs and ensuring traffic safety.Īs an important part of road infrastructure, traffic signs convey essential information in terms of guidance, restrictions, warnings, or instructions to drivers and pedestrians. The results show that reasonable perforation diameters and hole spacings can reduce the wind load and improve the wind load resistance of sign boards. By analysing the wind pressure distribution on the surface of the perforated traffic sign board, the perforation scheme for different regions of the sign board under different wind loads was obtained. Therefore, the RNG model is used to simulate the wind load of traffic sign boards with different perforation diameters and different hole spacings under different wind speeds. By comparing the solutions to different turbulence models with empirical results, it was found that the simulation results of the re-normalisation group (RNG) model have the smallest error. Using computational fluid dynamics simulations, the wind load resistance of traffic signs with holes was optimised. To increase their resistance to strong winds, sign boards are perforated. Traffic sign boards are often blown away by strong winds, seriously endangering the safety of vehicles and pedestrians.
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