中央肋对接平尾结构非对称载荷测量技术

ASYMMETRIC LOAD MEASUREMENT TECHNOLOGY FOR CENTRAL RIB BUTTED HORIZONTAL TAIL STRUCTURE

针对中央肋对接平尾结构,使用直接测量法和提出的唯象拟合法对其非对称弯矩载荷进行测量。通过先后开展虚拟试验和地面载荷校准试验,分别建立了两种测量方法的非对称载荷模型,并对其适用性和准确性进行研究。地面试验和飞行试验结果显示,唯象拟合法能够有效地完成平尾结构的非对称载荷测量,地面试验验模误差最大值为1.57%;直接测量法由于中央对称面附近连接有对接肋和平尾接头等导致局部传力比较复杂,测量精度较差,地面试验验模误差达到8.11%。

For the central rib butted horizontal tail structure,the asymmetric bending moment loads were measured by the direct measurement method and the proposed phenomenological fitting method.By carrying out virtual test and ground load calibration test successively,the asymmetric load models of the two measurement methods were established respectively,and their applicability and accuracy were studied.The ground load calibration test and flight test results show that the phenomenological fitting method could effectively complete the asymmetric load measurement of the horizontal tail structure,and the maximum value of the ground load calibration test model inspection error was 1.57%.In the direct measurement method,due to the connection of butt ribs and flat tail joints which near the central symmetry plane,the local force transmission of strain gage station was relatively complex.The accuracy of direct measurement method was poor,and the ground load calibration test model inspection error was up to 8.11%.