列车行驶时桥梁结构损伤预警的时域方法

付春雨;单德山;李乔

振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 27-32.

PDF(1498 KB)
PDF(1498 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (1) : 27-32.
论文

列车行驶时桥梁结构损伤预警的时域方法

  • 付春雨;单德山;李乔
作者信息 +

The time domain method for bridge structural damage alarming when the train is running

  • FU Chunyu;SHAN Deshan;LI Qiao
Author information +
文章历史 +

摘要

根据列车行驶时,铁路桥梁结构的损伤状态与列车荷载的相关性,提出了一种结构损伤预警的时域方法。该方法首先进行结构损伤敏感性分析,确定结构的易损截面;然后根据易损截面的损伤状态,从列车在桥梁上的行驶时间区域中,选择合适的子区域;再以加速度时域数据作为损伤指标,采用模式识别中支持向量机的方法在每个子区域内进行损伤预警研究。对一个三跨连续梁的实例分析表明:该方法具有较好的识别能力和较强的抗噪声能力。

Abstract

Based on the correlation between bridge’s damage state and train load when the train is running on railroad bridge, the time domain method for bridge structural damage alarming is put forward. Firstly, structural damage sensitivity is analyzed to find out the vulnerable sections in this method. Then right subdomains are selected from the time domain when the train is running on railroad bridge, owing to the damage state of the vulnerable sections. At last, by using the acceleration time domain data as damage index, support vector machine, one of pattern recognition methods, is used for damage alarming in every subdomain. A continuous girder is analyzed, and the results show that this method has a preferable capability of identification and noise resistance.

关键词

桥梁工程 / 损伤预警 / 子区域 / 时域数据 / 支持向量机

Key words

bridge engineering / damage alarming / subdomain / time domain data / support vector machine

引用本文

导出引用
付春雨;单德山;李乔. 列车行驶时桥梁结构损伤预警的时域方法[J]. 振动与冲击, 2011, 30(1): 27-32
FU Chunyu;SHAN Deshan;LI Qiao. The time domain method for bridge structural damage alarming when the train is running[J]. Journal of Vibration and Shock, 2011, 30(1): 27-32

PDF(1498 KB)

2017

Accesses

0

Citation

Detail

段落导航
相关文章

/