本文件旨在描述、讨论和澄清API标准段落（SP）第6.8节，该节概述了API为确保设备机械可靠性而设计的完整横向和扭转转子动力学和转子平衡验收程序。为不熟悉该主题的人提供了有关这些主题的基础知识（包括术语）以及本分析中使用的转子建模的背景材料。标准段落的介绍参考了适当的背景材料，以增强理解。 本信息旨在作为这一复杂主题的主要信息来源，并作为在典型横向动力学分析期间讨论的旋转设备振动主要方面的介绍。

This document is intended to describe, discuss, and clarify the API Standard Paragraphs (SP) Section 6.8 which outlines the complete lateral and torsional rotor dynamics and rotor balancing acceptance program designed by API to ensure equipment mechanical reliability. Background material on the fundamentals of these subjects (including terminology) along with rotor modeling utilized in this analysis is presented for those unfamiliar with the subject.The standard paragraphs are introduced with references to the appropriate background material to enhance the understanding. This information is intended to be a primary source of information for this complex subject and is offered as an introduction to the major aspects of rotating equipment vibrations that are addressed during a typical lateral dynamics analysis.