摘要
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。
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.
出处
《兵工自动化》
2013年第9期50-53,79,共5页
Ordnance Industry Automation
基金
国家自然科学基金资助项目(11172093
11032004)
关键词
转子叶片
模态分析
振动
有限元
rotor blade
modal analysis
vibration
finite element
