Study On The Control Of Wind Pressure And The Wind-resistant Reliability For Low Structure

The coastal areas of China often suffer from typhoons,resulting in low structure being destroyed,so the problem of wind-resistant of low structure becomes a hot topic in the research field of wind engineering.The wind disaster may cause the low structure failing to complete the intended function or even being destroyed,which not only causes huge economic losses,but also may pose a threat to human.Thus,it is important to study the wind-resistant reliability of the low structure,so as to reduce the destruction caused by typhoons.Plasma flow control technology is a new flow control technology in recent years,and it is widely concerned by the field of aerospace with many achievements.This paper makes the plasma flow control technology applied to low structure,and investigates the impact of the plasma flow control technology on the wind pressure of low structure with wind tunnel experiment and numerical simulation.At the same time,in order to evaluate the reliability of low structure,this paper uses the corresponding surface method to calculate the wind-resistance reliability of trough condenser.First,we conduct the wind tunnel experiment by installing the plasma actuator created by us in low structure,and explore the change of wind pressure coefficient before and after the plasma excitation.The results show that the plasma excitation can have a significant effect on the wind pressure coefficient.Then,by introducing the plasma excitation into a model of the volume force and adding the plasma volume force to the Fluent software,we simulate the influence of the plasma excitation on the roof wind pressure of the low house and achieve the flow structures of low structure before and after the plasma excitation.The results present that plasma excitation can have a significant effect on the roof wind pressure coefficient and also can change the flow structure of low structure,which is consistent with the results of the wind tunnel experiment.Finally,this paper investigates the wind-resistance reliability of the trough condenser with Midas finite element software and response surface method,and finds that the response surface method can be used to analyze the reliability of the complex function.Moreover,the reliable probability of the condenser structure is 99.79%,which can meet the reliability requirements of condenser lens structure.