Flow-induced vibrations in bellows
Flow-induced vibrations in bellows
复制标题
波纹管中的流动引起的振动
DOI：
10.1115/1.3265697
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
P. Ainsworth
中科院分区：
文献类型：
--
作者：
D. Weaver;P. Ainsworth
水流引起的振动已导致许多承载冷却水流的波纹管装置出现疲劳故障。波纹管由 Inconel 600 制成，标称内径为 20 mm。本文介绍了研究这些振动并开发减振方法的项目的结果。实验是在原型波纹管上进行的，观察振动幅度和频谱作为流速的函数。波纹管表现出流动引起的共振峰，随着流速的增加而激发出连续更高的模式。发现在使用条件下使用的上游流动几何形状可以降低产生共振所需的平均流速。人们发现细不锈钢丝网是消除振动的最有效方法。
Flow-induced vibrations have caused fatigue failures in a number of bellows units carrying cooling water flows. The bellows are made from Inconel 600 and have a nominal inside diameter of 20 mm. This paper presents the results of a project undertaken to study these vibrations and to develop a method for vibration alleviation. The experiments were conducted on prototype bellows with vibration amplitudes and frequency spectra being observed as a function of flow velocity. The bellows exhibit flow-induced resonant peaks with successively higher modes being excited by increasing flow velocities. The upstream flow geometry used in service conditions was found to reduce the mean flow velocity required to produce resonance. A fine stainless steel wire mesh was found to be the most effective means of eliminating the vibrations.