CAJ | 학술논문

航空发动机转子叶片主要有以下三种振动形式：弯曲振动、扭转振动、弯扭耦合振动．在叶片的振动中，当强迫振动的频率与叶片的固有频率相同时就会引起共振而造成叶片破坏，故知道叶片自由振动的固有频率就显得尤为重要．根据有限元分析，叶片一阶振型表现为弯曲变形，二阶振型表现为扭转变形，本文分别讨论了叶片的自由弯曲振动及自由扭转振动固有频率的理论计算方法，为航空发动机转子叶片振动理论做一些基础性的准备工作．
항공발동궤전자협편주요유이하삼충진동형식：만곡진동、뉴전진동、만뉴우합진동．재협편적진동중，당강박진동적빈솔여협편적고유빈솔상동시취회인기공진이조성협편파배，고지도협편자유진동적고유빈솔취현득우위중요．근거유한원분석，협편일계진형표현위만곡변형，이계진형표현위뉴전변형，본문분별토론료협편적자유만곡진동급자유뉴전진동고유빈솔적이론계산방법，위항공발동궤전자협편진동이론주일사기출성적준비공작．
Bending vibration, torsional vibration and coupling of the flexural and torsional vibrations are the three type vibration of aero-engine rotor blade. Resonance of the aero-engine blade will occur when the frequency of forced vibration is near by any natural frequency of any form of the free vibration. The resonance results in the blades damaging. So it is important to analyze the natural frequency of free vibration. According to the finite element analysis, the first vibration mode of blade manifest as bending deformation, the second vibration mode as torsional deformation. Numerical calculation method of free bending vibration and free torsional vibration are introduced for doing some basic preparative work of theory of vibration.