CAJ | 학술논문

针对涡轮旋转机械的叶片所处的高温、高压及复杂多场环境，建立其弯曲和扭转两自由度耦合的截面模型，研究了来流速度对振幅的影响。利用平均法和能量法原理，得到了系统在发生临界颤振时的幅频关系以及在能量输入输出情况下系统的稳定性关系，避免了颤振发生引起的气动弹性设计失效问题，从而对叶片的优化设计提供理论依据。
침대와륜선전궤계적협편소처적고온、고압급복잡다장배경，건립기만곡화뉴전량자유도우합적절면모형，연구료래류속도대진폭적영향。이용평균법화능량법원리，득도료계통재발생림계전진시적폭빈관계이급재능량수입수출정황하계통적은정성관계，피면료전진발생인기적기동탄성설계실효문제，종이대협편적우화설계제공이론의거。
Blades of turbines and compressors are important components to produce power.They works often in a complicated condition with high pressure,high temperature and three dimensional fluid flows as well.The aeroelastic problem such as blade flutter may occur during different working states.Flow-induced vibration of a blade with coupling of bending and torsion was investigated to reveal the mechanism of a flutter.Averaging method and power flow approach were used to demonstrate flutter behaviors of the interaction between an isolated blade and a quasi-steady flow.The relation between amplitudes and frequencies of blade vibration was obtained to predict flutters.The results provided a theoretical basis for aeroelastic optimal design of blades.