Study on the influence of hold-down spring on the vibration characteristics of core barrel

The influence of hold-down spring (HDS) on the vibration characteristics of core barrel is studied in this paper. First, the vibration characteristics experiment of core barrel was carried out with four type of different hold-down spring. These hold-down springs represent the same hold-down force un...

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Bibliographic Details
Published in:Nuclear engineering and technology 2023, 55(9), , pp.3252-3259
Main Authors: Tan, Tiancai, Sun, Lei, Liu, Litao, Yang, Jie
Format: Article
Language:English
Subjects:
Core barrel
Hold-down force
Hold-down spring
Spring stiffness
Vibration characteristics
원자력공학
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Summary:The influence of hold-down spring (HDS) on the vibration characteristics of core barrel is studied in this paper. First, the vibration characteristics experiment of core barrel was carried out with four type of different hold-down spring. These hold-down springs represent the same hold-down force under different spring stiffness and different hold-down force under the same spring stiffness. And then a new finite element method for researching the influence of hold-down spring on the vibration characteristics of core barrel was presented. This new method could consider the influence of the hold-down force and the spring stiffness at the same time. The results suggest that, the hold-down force and friction have greater influence on the vibration characteristics of core barrel than the spring stiffness, and the influence is nonlinear. The influence of the boundary condition on beam mode is greater than that on shell mode for core barrel.
ISSN:1738-5733
2234-358X
DOI:10.1016/j.net.2023.05.027