本文件给出了识别以下各项的指南: a） 接地轴承系统的典型结构，以显示哪些部件可能包含此类系统以及这些部件提供哪些功能； 注意接地轴承也被称为“备用轴承”、“辅助轴承”，“捕捉器轴承”或“着陆轴承”。在本文件中，术语“触地轴承”专用于ISO14839？1. b） 着陆轴承系统的功能要求，以便设定明确的性能目标； c） 动态系统设计中要考虑的元素，以便能够优化接地轴承和主动磁轴承（AMB）的转子动态性能； d） 对触地轴承系统性能有重大影响的环境因素允许优化整体机器设计； e） AMB操作条件可能导致触地轴承系统内发生接触，因此此类事件可被视为整体机器设计的一部分。 它还考虑了AMB系统内可能导致接触事件的故障模式。这可确保接地轴承的规格涵盖所有操作要求； f） 最常见的触地轴承故障模式和管理这些事件的典型机制； g） 着陆轴承系统设计过程的典型要素，包括载荷要求规范、尺寸确定过程、设计验证所用的分析和模拟方法； h） 设计触地轴承系统验收测试计划时应考虑的参数，包括规定的测试条件和用于确保成功执行测试的相关仪器； i） 允许评估在役接地轴承状态的状态监测和检查方法，并在必要时确定要采取的纠正措施； j） 设计触摸保养制度时要考虑的因素- 向下轴承系统，包括在特定事件发生后采取的措施以及定期采取的任何措施； k） 与其他生命周期主题相关的考虑因素（例如，淘汰管理、停运和处置）。

This document gives guidelines for identifying: a) The typical architectures of touch-down bearing systems to show which components are likely to comprise such systems and which functions these components provide; NOTE       Touch-down bearings are also known as “backup bearings”, “auxiliary bearings”, “catcher bearings” or “landing bearings”. Within this document, the term “touch-down bearings” is used exclusively as defined in ISO 14839？1. b) The functional requirements for touch-down bearing systems so that clear performance targets can be set; c) Elements to be considered in the design of the dynamic system such that rotordynamic performance can be optimized, both for touch-down bearings and active magnetic bearings (AMBs); d) The environmental factors that have significant impact on touch-down bearing system performance allowing optimization of overall machine design; e) The AMB operational conditions that can give rise to contact within the touch-down bearing system so that such events can be considered as part of an overall machine design. It also considers failure modes within the AMB system that can give rise to a contact event. This ensures that the specification of the touch-down bearings covers all operational requirements; f) The most commonly encountered touch-down bearing failure modes and typical mechanisms for managing these events; g) Typical elements of a design process for touch-down bearing systems including the specification of load requirements, the sizing process, the analytical and simulation methods employed for design validation; h) The parameters to be taken into account when designing a touch-down bearing system acceptance test programme including the test conditions to be specified and the associated instrumentation to be used to ensure successful test execution; i) The condition monitoring and inspection methods that allow the status of in-service touch-down bearings to be evaluated and when necessary identifying the corrective actions to be taken; j) The factors to be considered when designing the maintenance regime for a touch-down bearing system including the actions to be taken after specified events have occurred together with any actions to be performed on a regular basis; k) The factors to be considered regarding other life cycle topics (e.g. obsolescence management, de-commissioning and disposal).