摘要：The effect of aspect ratio of length to diameter on the dynamic response of a fluid-conveying pipe has been studied using the Timoshenko beam model. The coupled partial differential equations are solved by generalized integral transform technique. A comparison between the numerical results based on the Timoshenko beam model and the Euler-Bernoulli beam model was conducted to evaluate the effect of aspect ratio on the dynamic response of a fluid-conveying pipe. The limits of applicability of the Euler-Bernoulli beam theory were studied. By using generalized integral transform technique, the effect of aspect ratio on different mode dynamics was studied. The results indicate that the natural frequencies decrease with the increasing of internal fluid velocity, and its values are closer to the ones from Euler-Bernoulli beam model with a larger aspect ratio and lower mode. When the mode is higher, the natural frequency is decreasing more dramatically with the decreasing of aspect ratio. The critical velocity decreases with the decreasing of aspect ratio. Meanwhile with internal flow velocity increasing, the maximum vibration deflection is increasing faster with smaller aspect ratio, which means that a pipe conveying fluid will lose stability more easily with a smaller aspect ratio at a specific internal flow velocity.
© 2016 Elsevier Ltd.Allrightsreserved.

ISSN号：0029-8018

卷、期、页：v 114,p185-191

发表日期：2016-03-01

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：OCEAN ENGINEERING

参与作者：Ma, Tianqi

第一作者：顾继俊,段梦兰

论文类型：期刊论文

论文概要：顾继俊,Ma, Tianqi,段梦兰，Effect of aspect ratio on the dynamic response of a fluid-conveying pipe using the Timoshenko beam model，OCEAN ENGINEERING，2016，v 114,p185-191

论文题目：Effect of aspect ratio on the dynamic response of a fluid-conveying pipe using the Timoshenko beam model