汽轮机叶片——叶轮系统耦合振动特性的理论计算和实验研究

对汽轮机叶片—叶轮系统（轮系）耦合振动特性进行了理论和实验研究。首先介绍了一种简便实用的计算轮系振动特性的数值积分方法。此方法考虑了叶片的剪切变形、转动惯量、叶轮轮孔处支承柔度、叶片和叶轮连接处的叶根柔度及离心力等影响轮系振动的各种主要因素，给出了焊拉筋和松拉筋的处理方法，可供计算各种结构轮系振动的静、动频谱和相应的振型。其次，本文利用锤击法对叶片—叶轮系统模型进行了模态分析和参数识别，得到系统各阶固有频率和振型，理论计算结果与实验值的比较较为吻合。

^THEORETICAL AND EXPERIMENTAL RESEARCH ON THE COUPLED VIBRATION CHARACTERISTICES OF BLADED DISK IN STEAM TURBINE

Theoretical and experimental research on the coupled vibration characteristics of bladed disk insteam turbine are discussed in this paper. First,the paper puts forward a simple and practical numerical integrationto calculate the vibration characteristics of bladed disk. Various primary factors which influence the coupled vibration characteristics of bladed disk,such as shear deformation,rotary inertia of the blada and disk,and centifugalforce are considered in the model,therefore the method can be use to calculate the static frequency,rotating frequency and mode shape of various structure of bladed disk. Second,hammering method is used to modal analyzesthe bladed disk model and obtain the natural frequency and mode shape. Finally,the calculating results are compared with the experimental results,they are fit well with each other.