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DEVELOPMENT OF AN ASSET INTEGRITY MANAGEMENT STRATEGY FOR MARINE PROPULSION SHAFTS

机译:开发船舶推进轴的资产诚信管理策略

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The propulsion tailshafts fitted to submarines are potentially at risk from environmentally-assisted cracking in service due to the combination of a large number of rotating-bending stress cycles in conjunction with the possibility of exposure to seawater. Contact with seawater will cause corrosion pits to form which could act as fatigue initiators. To prevent this occurring, the exposed parts of the shaft are protected by an epoxy bandage. However, previous experience with older shafts has shown that the bandage may not entirely prevent ingress of seawater throughout the life of the shaft. In order to manage the risk of environmentally-assisted cracking, an Asset Integrity Management (AIM) strategy has been developed that defines a through-life inspection procedure intended to maintain shafts at their target level of operational safety. This paper describes the processes used to develop the AIM plan, establish user and system requirements, and select the optimum inspection technology for the application. The potential for transfer of this knowledge to future designs is also discussed.
机译:由于大量旋转弯曲应力循环结合接触海水的可能性,适合潜艇的推进尾部可能存在于服务中的环境辅助开裂的风险。与海水接触将导致腐蚀坑,其形式可以充当疲劳引发剂。为了防止发生这种情况,轴的暴露部分受环氧绷带保护。然而,以前的较旧轴的经验表明,绷带可能完全防止在轴的整个寿命中侵入海水。为了管理环境辅助开裂的风险,已经制定了资产完整性管理(AIM)策略,用于定义旨在维持其目标运行安全水平的轴的贯穿寿命检查程序。本文介绍了用于开发AIM计划,建立用户和系统要求的过程,选择应用的最佳检测技术。还讨论了将此知识转移到未来设计的可能性。

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