一种两自由度全机模型阵风试验支撑装置研制

全机模型风洞阵风试验不仅要求模拟飞机弹性模态,还要求模拟飞机刚体运动模态.国内现有的气弹试验钢索悬挂支撑方式和侧壁支撑方式不能满足全机模型阵风试验支撑需求.为此,在中国空气动力研究与发展中心低速空气动力研究所8 mX6 m风洞中研制了一套两自由度支撑装置.该装置可提供模型沉浮和俯仰方向较大的运动自由度,以模拟飞机刚体运...

Development of a two degrees of freedom support system for full model gust tests

This paper describes the development of a support system for free flying dynamically scaled full model. The free flying model requires plunge and pitch degrees of freedom(DOF) for the measurement of the gust response in the 8 m×6 m wind tunnel in LSAI of CARDC. The main part of the system consists of 2 slideways and a steel beam. The characteristics of the system include: its left and right structures are symmetrical, the range of free movement in the plunge direction is 2.8 m and the coefficient of friction is 0.006, the range of free movement in the pitch direction is ±10°, the lowest frequency of the system supporting a 50 kg model is not less than 12 Hz, and the structure changes in the test section can be ignored. By optimizing the structure and selecting the materials, the sliding carriage's mass is less than 6 kg. A gust load alleviation test for a full model was successfully completed by the use of the support system, which verifies the practical effect of the system.