Use of a passing vehicle to scan the fundamental bridge frequencies: An experimental verification
Use of a passing vehicle to scan the fundamental bridge frequencies: An experimental verification
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DOI：
10.1016/j.engstruct.2005.06.016
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发表时间：
2005-11-01
影响因子：
5.5
通讯作者：
Yang, YB
中科院分区：
文献类型：
--
作者：
Lin, CW;Yang, YB
用一辆由轻型卡车牵引的两轮小车扫描支撑桥的振动基频。卡车通过它的运动刺激桥梁，从而起到桥梁的激励作用。桥的振动由安装在车上的加速度计接收或扫描。桥梁的运动将影响拖车的动力响应，而拖车则是桥梁动力特性，特别是振动频率的接收器或扫描仪。安装在小车上的加速度计记录下的响应经过快速傅里叶变换（FFT）处理，提取出小车的“源”频率，这正是桥梁的振动频率。通过现场试验，验证了用拖车扫描桥梁基频的可行性。本文首次开发的方法简单有效，只要对基频感兴趣，就可以应用于广泛的桥问题。(c) 2005 Elsevier Ltd版权所有。
A two-wheel cart towed by a light truck is used to scan the fundamental frequency of vibration of a sustaining bridge. The truck excites the bridge through its movement, thereby serving as an exciter to the bridge. The bridge vibration is received or scanned by an accelerometer installed in the cart. The bridge that is set into motion will affect the dynamic response of the towed cart, which in turn serves as a receiver or scanner of the bridge's dynamic properties, especially the frequencies of vibration. The response recorded using an accelerometer installed in the cart is processed by a fast Fourier transform (FFT) to extract the "source" frequencies of the cart, which are exactly the frequencies of vibration of the bridge. The feasibility of scanning the fundamental frequency of the bridge using the towed cart is confirmed by field tests. The methodology developed for the first time herein is simple and efficient, and can be applied to a wide range of bridge problems, if only the fundamental frequency is of interest. (c) 2005 Elsevier Ltd. All rights reserved.