标准摘要
[中文适用范围]： 本文件提供了在正常工作条件下评估机组和燃气轮机发电机组的耦合轴系（包括长弹性转子叶片）的扭转固有频率和部件强度的指南。 特别地，该指南适用于由于涡轮发电机组所连接的电网的电激励而导致的耦合轴系在电网频率和两倍电网频率下的扭转响应。 本文件不涉及其他频率（例如次谐波频率）的激励。 没有给出关于由蒸汽激励或与电网无关的其他激励机制引起的扭转振动响应的指南。 如果轴横截面和联轴器不满足所需的强度标准和/或扭转固有频率不符合定义的频率裕度，则应定义其他措施来解决问题。 本文件中包含的要求适用于 a) 连接到电网的团队涡轮发电机组，和 b) 连接到电网的燃气轮机发电机组。 还描述了目前可用于对轴系扭转固有频率进行分析评估和测试验证的方法。 注 ISO 20816-2 涉及机组和/或燃气轮机发电机组的径向（横向、横向）和轴向振动。 [外文原描述]： This document provides guidelines for the assessment of torsional natural frequencies and component strength, under normal operating conditions, for the coupled shaft train, including long elastic rotor blades, of steam and gas turbine generator sets. In particular, the guidelines apply to the torsional responses of the coupled shaft train at grid and twice grid frequencies due to electrical excitation of the electrical network to which the turbine generator set is connected. Excitation at other frequencies (e.g. subharmonic frequencies) are not covered in this document. No guidelines are given regarding the torsional vibration response caused by steam excitation or other excitation mechanisms not related to the electrical network. Where the shaft cross sections and couplings do not fulfil the required strength criteria and/or torsional natural frequencies do not conform with defined frequency margins, other actions shall be defined to resolve the problem. The requirements included in this document are applicable to a) steam turbine generator sets connected to the electrical network, and b) gas turbine generator sets connected to the electrical network. Methods currently available for carrying out both analytical assessment and test validation of the shaft train torsional natural frequencies are also described. NOTE Radial (lateral, transverse) and axial vibration of steam and/or gas turbine generator sets is dealt with in ISO 20816-2.
英文名称Mechanical vibration — Torsional vibration of rotating machinery — Part 1: Evaluation of steam and gas turbine generator sets due to electrical excitation