The Aeroelastic Characteristic of a Wing with Preload Asymmetry Freeplay

摘要：

　　Nonlinearities in designing aircraft are inevitable.It is necessary to investigate the effects of them on the dynamic response.The aeroelastic dynamic model with freeplay nonlinearity in pitch degree of freedom is established with the Theodorsen aerodynamic model.The harmonic balance method is employed to obtain the flutter boundary.Then the nonlinear responses and the stability characteristic are studied by using the time marching aeroelastic method.The effects of the initial displacement in pitch degree of freedom and the gap size on the LCO characteristics are investigated.Results show that the appearance of the LCO depends on the initial condition and the flow speed.The velocity range for the existence of the LCO and the LCO amplitude are related to the freeplay gap.

关键词： Aeroelasticity Preload freeplay Harmonic balance method Limit cycle oscillation Direct integral method

作者: Zhang Hui Wu Jingtao

作者单位: China Aircraft Strength Research Institute,Xian 710065,China

会议类型: 国际会议

会议名称: 2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)

会议地点: 上海

会议语种:英文

页码: 1-7

在线出版日期: 2014-09-24（万方平台首次上网日期，不代表论文的发表时间）