Critical velocity of a load moving on a beam with a sudden change of foundation stiffness: Applications to high-speed trains

被引：65

作者：

Dimitrovova, Z. ^{[1
]}

Varandas, J. N. ^{[1
]}

机构：

[1] Univ Nova Lisboa, Dept Civil Engn, UNIC, Monte De Caparica, Portugal

来源：

COMPUTERS & STRUCTURES | 2009年 / 87卷 / 19-20期

关键词：

Foundation stiffness; Critical velocities; High-speed trains; Induced vibration; Moving load; Transition radiation; VIBRATIONS;

D O I：

10.1016/j.compstruc.2008.12.005

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

The transient dynamic response of a beam supported on a foundation with sudden stiffness change and subjected to a force moving with constant velocity is analysed. The abrupt change is located at the midsection of the beam of finite length. Two analytical approaches are implemented. In the first one, the response is obtained by finite integral transformations incorporating global modes of vibration, while in the second the analytical responses of each half of the beam are linked by continuity conditions. The values obtained are used to study the influence of the abrupt change on the critical velocities. The analyses carried out enable to reach results and draw conclusions directly related to the knowledge of ground vibrations induced by high-speed trains. (C) 2008 Civil-Comp Ltd. and Elsevier Ltd. All rights reserved.

引用

页码：1224 / 1232

页数：9

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