摘要
为了更好地了解和掌握发动机固有的振动特性,利用有限元分析ANSYS软件,对某型发动机双转子系统进行了固有频率及振型计算。通过改变轴承的刚度与原计算结果作对比,分析轴承刚度的改变对整个系统动力特性的影响。结合振动力学相关理论,对设计方案进行动力学评价。结果表明,该方法运算速度快,输入参数少,特征值、特征向量求解精度高。
In order to understand and predominated the inherent vibration characteristics of the engine better, the natural frequencies and vibration mode shapes of the dual-rotor system of Aero-engine are calculated based on the ANSYS program. Compared with the original calculation, the impact by change of stiffness in bearings on the dynamic properties of the whole system is analyzed. Integrated with the mechanical vibration theory, dynamics evaluations for the design are carried out. The results show that the computing speed of this method is fast and the eigenvalue and the eigenvector can be obtained with high precision and few input parameters.
出处
《兵工自动化》
2010年第2期34-36,共3页
Ordnance Industry Automation
基金
国家自然科学基金资助项目(10672053)
关键词
双转子
有限元方法
模态分析
Dual-rotor
Finite element method
Modal analysis
