铰链力矩天平作为一种测力元件广泛应用于铰链力矩风洞试验中。受到安装环境限制,铰链力矩天平尺寸一般较小,其元件部分及连接端多为片状结构,片状结构的连接端在连接模型主体或舵面时,连接面处会产生接触变形及接触应力,此接触应力会对天平的测量产生影响。为了研究铰链力矩天平结构尺寸对天平输出量的影响程度,使用有限元计算方法结合正交试验设计,分析了法向力加载下铰链力矩天平固定端结构参数变化对天平输出的影响趋势。研究结果表明:正交试验涉及的片式铰链力矩天平固定端厚度、接触面积和连接螺钉位置对铰链力矩天平输出量均存在显著影响,铰链力矩天平固定端接触面积影响最大,连接螺钉位置次之,铰链力矩天平固定端厚度影响最小。

Hinge moment balance as a force measuring element is widely used in the wind tunnel test of hinge moment.The size of the hinge moment balance is limited by the installation environment and is generally small and mostly sheet-like structure. When the connecting end of the sheet-like structure is connected to the model body or the rudder surface, contact deformation and contact stress will occur at the connecting surface. This contact stress will affect the balance. The measurement has an impact.In order to study the influence of the structural parameters of the hinge moment balance on the output of the balance, the finite element calculation method combined with orthogonal experimental design was used to analyze the influence trend of the change of the fixed end of the hinge moment balance on the output of the balance under normal force loading. The research results show that the thickness of the fixed end of the chip hinge moment balance, the contact area and the position of the connecting screw involved in the orthogonal experiment have significant effects on the output of the hinge moment balance. Among them, the contact area of the fixed end of the hinge moment balance has the greatest influence, followed by the position of the connecting screw, and the thickness of the fixed end of the hinge moment balance has the least influence.