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悬臂静子叶片连同机匣是航空发动机静子系统的典型结构。应用有限元法分析结构周向弯曲振动的模态频率和振型,分别采用实体单元建模、梁壳单元建模、质量单元取代叶片的三种建模方法建立结构的有限元模型。通过对比分析三种有限元模型的计算结果和计算规模,结构的梁壳有限元模型有较好的计算精度并减小计算规模;在分析低阶模态中用质量单元取代叶片的建模方法满足计算精度,有限元的计算规模大为减小。
Cantilever stator blades together with the casing are typical structures of aero-engine stator systems. The finite element method was used to analyze the modal frequencies and mode shapes of the circumferential bending vibration of the structure. The finite element model of the structure was established by using three modeling methods: solid element modeling, beam shell element modeling and mass element replacing blade. By comparing and analyzing the results of three finite element models and the calculation scale, the finite element model of the beam shell has better calculation accuracy and reduces the calculation scale. In the analysis of low-order modes, To meet the calculation accuracy, finite element calculation greatly reduced the scale.