地面颤振模拟试验技术研究进展

Research progress of ground flutter simulation test technology

颤振问题是飞行器在飞行过程中应竭力避免,且可能导致灾难性后果的一种气动弹性动力学稳定性问题。作为一种新兴的颤振试验研究方法,地面颤振模拟试验是指直接采用飞行器原型结构或模型结构作为试验对象,利用激振器等气动力模拟加载装置模拟分布的气动力载荷,在地面获得飞行器结构颤振特性的一种半物理仿真试验技术。本文从非定常气动力降阶实时重构、非定常气动力模拟加载以及地面颤振模拟试验的实施3个方面,分析了地面颤振模拟试验技术的研究现状,最后展望了地面颤振模拟试验技术未来的发展方向。

Flutter is a kind of aeroelastic dynamic stability problem that should be avoided during flight and may lead to disastrous consequences.Ground Flutter Simulation Test(GFST)is an emerging method for flutter testing,which directly uses the prototype structure or model structure of the aircraft as the test object and is a semi-physical simulation test technique.Aerodynamic simulation loading devices,such as shakers,are used to simulate the distributed aerodynamic loads on the structure,so that the aeroelastic stability characteristics of the real structure can be obtained on the ground(outside the wind tunnel).In this paper,the research status of GFST technology is analyzed from three aspects:reduced-order real-time reconstruction of the unsteady aerodynamic,unsteady aerodynamic simulation loading,and implementation of GFST.Future development directions of the GFST technology are also discussed.