CAJ | 학술논문

为更好地了解和掌握发动机叶片的固有振动特性，对某发动机转子叶片进行模态分析和谐响应分析。利用大型有限元计算软件ANSYS，采用三维实体单元建立有限元模型，得到了不同材质叶片的前8阶固有频率和振型，并将分析结果与实验结果比较。结果表明：钛合金更适合作为叶片的铸造材料；在简谐载荷作用下，叶顶的响应要远大于叶根部的响应值；采用20节点的三维实体单元计算精度高；定轴转动叶片的离心力载荷主要影响叶片的扭转振动频率。
위경호지료해화장악발동궤협편적고유진동특성，대모발동궤전자협편진행모태분석화해향응분석。이용대형유한원계산연건ANSYS，채용삼유실체단원건립유한원모형，득도료불동재질협편적전8계고유빈솔화진형，병장분석결과여실험결과비교。결과표명：태합금경괄합작위협편적주조재료；재간해재하작용하，협정적향응요원대우협근부적향응치；채용20절점적삼유실체단원계산정도고；정축전동협편적리심력재하주요영향협편적뉴전진동빈솔。
In order to understanding and predominating the inherent vibration characteristics of engine blades, modal analysis and harmonic response analysis of a blade are calculated based on ANSYS program. Established finite element model by three dimensional solid element, got the first eight natural frequency and vibration mode. Compared with the experiment result, titanium alloy material can be used cast blade better. With the harmonic load, the response on blade tip is more greater than the response on blade root. The calculated results by ANSYS with twenty nodes element agree with the experimental results definitely. The centrifugal force of rotational blade changes the torsional vibration frequency principally.