大变形条件下机翼法向载荷的随动加载技术

Tracking Loading Technology of Wing's Normal Force Under Large Deformation Condition

在静强度试验中大展弦比机翼的变形量会随加载级数的增加而增大,机翼法向载荷方向也会随之发生变化。为提高机翼在大变形条件下法向载荷加载的准确性,本文以机翼为研究对象,考虑其非线性变形的特点,提出了一种随动加载技术,即随着机翼的变形,作用在机翼上的法向载荷作动筒的方向也随之调整变化,保证机翼所受载荷始终沿法向,同时设计了验证试验进行验证。试验结果表明,该随动加载技术可用于大变形机翼法向载荷加载,为机翼静强度试验加载提供了一种新的方法。

In the static test,the deformation of wing with high-aspect-ratio will increase with loading level increment and the normal force direction of the wing will change at the same time.Taking the wing as the research object and considering the nonlinear deformation of feature,this paper proposes a kind of tracking loading technology in order to improve the accuracy of the wing’s normal force under the condition of large deformation.With the deformation of the wing,the direction of the actuator’s normal force is adjusted to ensure that the loading is always in the normal direction.The verification test is designed to validate the tracking loading technology in the end.The results show that the tracking loading technology can be used for the large deformation wing under normal force,which provides a new method for the wing static test.