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

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:
依托单位国家:
加拿大
项目类别:
Discovery Grants Program - Individual
财政年份:
2008
资助国家:
加拿大
项目状态:
已结题
起止时间:
2008-01-01 至 2009-12-31

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中文摘要
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英文摘要
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.
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