@article {Qi:2019:0736-2935:3715,
title = "Research on In-plane Fluid-elastic Instability of Heat Transfer Tube in Steam Generator",
journal = "INTER-NOISE and NOISE-CON Congress and Conference Proceedings",
parent_itemid = "infobike://ince/incecp",
publishercode ="ince",
year = "2019",
volume = "259",
number = "6",
publication date ="2019-09-30T00:00:00",
pages = "3715-3722",
itemtype = "ARTICLE",
issn = "0736-2935",
url = "https://ince.publisher.ingentaconnect.com/content/ince/incecp/2019/00000259/00000006/art00075",
author = "Qi, Huan-huan and Jiang, Nai-bin and Huang, Xuan and Feng, Zhi-peng",
abstract = "Due to a small gap between the anti-vibration bars (AVBs) and the heat transfer tubes, and according to the position of AVBs and the number of continuous failures of the in-plane support, the in-plane restraint failure analysis of AVB is divided into 13 cases. The influence of the restraint
failure on the in-plane mode of the heat transfer tube under different cases is analysed. The mode damping ratio was calculated by performing a weighted average method based on the mode shape function, and then the effects of different restraints by AVBs on fluid-elastic instability of steam
generator tubes are studied. The analysis results show that with the increase of the continuous failure position of the in-plane support, the first-order modal frequency in the elbow zone decreases continuously, and the mode shape appearing in the elbow zone becomes more obvious. The first-order
mode in the elbow zone is not necessarily the mode in which the largest fluid-elastic instability ratio occurs. The vibration mode with the largest ratio of the fluid-elastic instability appears almost in the elbow zone. With the increase of the continuous failure position of the in-plane
support, the fluid-elastic instability ratio increases continuously. When three or more continuous AVBs fail in-plane, fluid-elastic instability will occur.",
}