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本文采用扇形厚板元和波传动法,计算了叶盘组合模型件的振动特性,讨论了组合体与单独叶片及轮盘振动特性的差异,分析了叶盘几何参数变化所产生的影响。文中还对某实际叶盘组件进行了有限元分析,并用实验方法作了检验,结果表明两者是吻合的。 用有限元法计算叶盘组合体振动,有两种较好方法:一种是Kirkhope和Wilson提出,后经Mota Soares等人发展成半解析的环形元法(即有限条法);另一种是后者提出的采用扇形厚板元的波传动法。这两种方法都具有取单元和节点数少、计算精度高等优点,较便于工程应用。然而,这些方法对实际叶盘组件进行计算的经验尚不多,国内外还没有精度高的范例。本文作者经过大量的计算考核,认为对实际叶盘组件的计算拟采用扇形厚板元与厚壳元的组合方案。
In this paper, the fan-shaped slab element and the wave-driven method are used to calculate the vibration characteristics of the leaf disc assembly model. The differences between the vibration characteristics of the combination body and the individual blades and the roulette wheel are discussed and the influence of the geometric parameters of the leaf disc is analyzed. The paper also carried out a finite element analysis of an actual leaf disc assembly, and the experimental method was tested, the results show that the two are consistent. Finite element method to calculate the vibration of the leaf disc assembly, there are two better methods: one is proposed by Kirkhope and Wilson, after the development by Mota Soares et al semi-analytical ring element method (ie finite strip method); the other Is the latter proposed fan-shaped plate wave drive method. Both of these methods have the advantages of fewer elements and nodes, higher computational accuracy, and are easier for engineering applications. However, these methods do not have much experience in calculating the actual leaf disk assembly, and no precise examples are available at home and abroad. After a large number of calculation and evaluation, the author thinks that the combination plan of fan-shaped thick plate element and thick shell element is proposed to calculate the actual leaf plate assembly.