水轮机主轴横向振动分析的有限单元法

Bending Vibration Analysis for Driving Shafts of Water Turbines by a Finite Element Method

针对三支点双悬臂、三支点单悬臂及二支点双悬臂水轮机主轴,分别建立了相应的有限元振动分析模型,导出了相应的振动分析方程,并采用逆迭代法求解主轴的第一阶自振频率。本方法已在计算机上实现。计算结果表明,本文方法精度高,程序运行可靠。

For the water turbine driving Shafts with three simple supports and two cantilevers, and three simple supports and single cantilever, as wall as two simple supports and two cantilevers, this paper establishes their finite element analysis models of bending vibration. And relevant vibration analysis equations are established. Solving vibration analysis equations with reverse iteration approach, the first free vibration frequences of driving shafts are obtained. The method presented here has been programmed, Examples show' that this method is highly reliable and accurate.