Vibro-impact dynamics of complex engineering structures with applications to fretting of nuclear fuel bundles

复杂工程结构的振动冲击动力学及其在核燃料束微动磨损中的应用

• 批准号: 203167-2007
• 负责人: Yu, Shudong
• 金额: $ 1.31万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=453160
• 关键词: Vibro; impact; dynamics; complex; engineering

In a nuclear reactor, presence of excessive vibrations of fuel bundles was found responsible for abnormal wear of the supporting structures or pressure tube. Failures of reactor components may lead to the partial loss of production or even complete shutdowns. Maintenance and replacement of severely worn components can be very costly. During operations, a string of fuel bundles are placed inside a fuel channel and are subjected to several sources of excitations including acoustic pressure pulsations, flow induced dynamic forces, etc. Because of small clearances between fuel bundles structures and the pressure tube, even small amplitude vibrations (fretting) can cause impact and sliding periodically.

在核反应堆中，燃料束的过度振动被发现是导致支撑结构或压力管异常磨损的原因。反应堆组件的故障可能导致部分生产损失甚至完全停堆。严重磨损部件的维护和更换成本可能非常高。在运行过程中，一串燃料棒束放置在燃料通道内，并受到多种激励源的作用，包括声压脉动、流动引起的动态力等。由于燃料棒束结构和压力管之间的间隙很小，即使是很小的振幅振动（微动）会导致周期性冲击和滑动。