基于弹性模型的飞机操纵动响应分析

Dynamic Response Analysis of Aircraft Maneuverbased on Aeroelastic Model

目的更好地研究飞机在操纵情况下的机体载荷和机体响应,同时验证动态响应分析模型和方法。方法以某型飞机突风载荷分析用的动气弹仿真模型为基础,考虑机体弹性修正和气动模型修正,梳理试验试飞的舵偏数据,利用MSC软件的动气弹仿真分析模块,将试飞的舵偏数据作为输入信号,开展舵面操纵情况下的机体响应仿真,并将飞机操纵情况下的机体响应分析结果与试验试飞结果进行对比。结果经过仿真和对比分析可以发现,分析数据和试飞数据整体吻合较好,能够较好地表征飞机的气动特性和结构动力学特性,同时在分析数据和试飞数据中均有比较明显的机体弹性响应成分。对于弹性飞机而言,除操纵造成的机体刚体响应外,机体弹性会带来额外的振动响应,对于特定的部位,这种振动可能是不可忽略的,需要根据具体情况进行详细分析。结论这种振动响应对飞机操纵、乘客舒适性是否会产生不利影响,需要进一步开展研究工作。

In order to study the dynamic load and aeroelastic response when the aircraft is maneuvering,dynamic aeroelastic analysis is done based on the gust load analysis model which considered the modal frequency correction and aero model correction in this paper.The analysis is done withMSC.NASTRAN.The elevator deflection signal in the flight test is used to do the dynamic aeroelastic analysis.With dynamic aeroelastic analysis,it can be found that the analyzed acceleration data can have a good match with the acceleration data getting from flight test.It shows that the model used in this paper can characterize the aerodynamic and structural dynamic characteristics of the real aircraft.At the same time,it can be noticed that the elastic vibration response is obvious in both analysis data and flight test data.For elastic aircraft,the elasticity of the body will cause additional vibration response.For specific stations of the aircraft,this vibration may not be ignored,which needs to be analyzed in detail.Further research can be done to analyze whether theelastic vibration response will have adverse effects.