风洞阻尼网受风载的挠度计算

Deflection Calculation of Wind Tunnel Screen under Wind Load

风洞阻尼网受风载会发生挠曲变形,从而影响阻尼网的性能。文中以方形截面阻尼网为研究对象,利用小变形时的近似处理方法,推导出阻尼网受风载的挠度计算公式,并分析最大挠度的影响因素。结果表明,施加一定程度的预紧力可以在不明显增加阻尼网应力的条件下减小阻尼网的最大挠度,是有效减小阻尼网挠度的合理方法。

The wind tunnel screen will be flexibly deformed under wind load,which will affect the performance of the screen.Taking the square section screen as the research object,this paper uses the approximation processing method of small deformation to derive the calculation formula of screen deflection under wind load,and analyzes the influencing factors of maximum deflection.The results show that applying a certain pre-tightening force can reduce the maximum deflection of the screen without significantly increasing the screen stress,which is a reasonable method to effectively reduce the screen deflection.