| Welch法在双曲拱桥固有频率检测信号识别中的应用 |
| |
| 引用本文： | 潘纬,王龙,宋彧.Welch法在双曲拱桥固有频率检测信号识别中的应用[J].工业控制计算机,2006,19(11):22-23. |
| |
| 作者姓名： | 潘纬 王龙 宋彧 |
| |
| 作者单位： | 兰州理工大学电信学院,甘肃,兰州,730050;兰州理工大学土木实验中心,甘肃,兰州,730050 |
| |
| 摘 要： | 随机振动法是检测桥梁信号中常用的一种方法,首先采用经典功率谱估计的方法对高速静态应变采集系统DH3817得到的数据进行处理,但频谱泄漏是不可避免的.因此采取Welch功率谱估计法,从而达到频域滑动平均的效果,去掉频域曲线中的"毛刺",最终得出该桥的固有频率,以判断该桥梁是否需要加固.
|
| 关 键 词： | Welch法 功率谱密度估计 FFT 频谱泄漏 |
| 收稿时间： | 10 10 2006 12:00AM |
| 修稿时间： | 2006年10月10 |
Recognition of Double-curvature Arch Bridge Natural Frequency Detection Signal Using Welch Power Spectrum Estimation |
| |
| Pan Wei.Recognition of Double-curvature Arch Bridge Natural Frequency Detection Signal Using Welch Power Spectrum Estimation[J].Industrial Control Computer,2006,19(11):22-23. |
| |
| Authors: | Pan Wei |
| |
| Affiliation: | Pan Wei et al |
| |
| Abstract: | The random vibration method is often used to detect the signal of bridge.In this paper;the classical spectrum estimation was used to process the data;which were gotten from high-speed strain sample system DH3817;but the spectrum leakage can't be avoided.To improve the frequency resolution;Welch spectrum estimation was used to get rid of 'splinter' and make the power spectrum curve much smoother.When the natural frequency was detected;the necessity of bridge reinforcement can be known. |
| |
| Keywords: | Welch spectrum estimation method spectrum estimation FFT spectrum leakage |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
