横Π型梁在风洞应变天平阻力结构上的应用

主要通过对比传统T型梁和横Π型梁,对风洞应变天平的阻力测量梁进行了分析,根据分析结果提出了传统的横Π型阻力测量梁的改进方式,并通过有限元分析软件进行了优化分析,改进后的横Π型阻力测量梁降低了升力对阻力的干扰,并有利于提高天平阻力分量的稳定性。该测量梁结构应用到了某型飞机高速风洞试验测力天平上,天平静态校准结果与理论分析结果吻合,风洞试验时天平状态良好、性能稳定。

The application of thwart Ⅱ beam to axial force structure of wind tunnel strain gauge balance

In this paper,the measurement beam of axial force of wind tunnel strain gauge balance was analyzed by contrasting the traditional T beam and thwart Π beam.Based on the analysis,we put forward the improvement on thwart Π beam,and the improved beam is optimized by using the FEA soft.The beam reduces the Y-interaction on X availably,benefiting the stability improvement of axial force.A balance on the high speed wind tunnel force test of an airplane model applies the thwart Π beam.The static calibration accords with the results of the analysis,and the balance is in order and stable during the wind tunnel test.