基于振动响应时频分析的桅杆损伤识别方法

周 凌;程 华;王仲刚;黄双杰

振动与冲击 ›› 2010, Vol. 29 ›› Issue (1) : 214-218.

PDF(1554 KB)
PDF(1554 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (1) : 214-218.
论文

基于振动响应时频分析的桅杆损伤识别方法

  • 周 凌;程 华;王仲刚;黄双杰
作者信息 +

DAMAGE IDENTIFICATION METHOD FOR GUYED MAST BASED ON TIME-FREQUENCY ANALYSIS OF VIBRATION RESPONSE

  • Zhou Ling;Cheng Hua;Wang Zhong-gang;Huang Shuang-jie
Author information +
文章历史 +

摘要

桅杆的模态参数和刚度对纤绳平衡张力、激励和环境条件比较敏感,导致目前比较有效的结构损伤识别方法和指标难以直接应用。为此,本文探索了基于测点振动响应时频分析而不依赖模态信息的桅杆结构损伤识别方法,提出利用结构测点振动响应的Wigner-Ville分布交叉项统计量WCS(WVD Cross-term Statistic),通过比较损伤前后统计量的相对变化量来进行损伤识别。算例分析结果表明,利用测点振动响应的损伤识别指标WCS相对变化量,除能识别杆身单个不同程度的损伤位置以及多个损伤外,还能分辩出纤绳的损伤特征。通过增大激励的幅值和增加测点的数量,可以提高识别的精度和指标的灵敏度;基于测点位移响应与基于测点加速度响应的损伤识别指标相比,具有更好的损伤识别效果。

Abstract

The model parameters and stiffness of guyed mast are sensitive to the initial pre-tension, excitation and environment, this leads many efficient methods and index difficult to be applied. A damage identification method that takes advantage of the time-frequency analysis of structure response and does not rely on modal information is explored, the relative alteration of Wigner-Ville Distribution Cross-term Statistic (WCS)based on vibratory response is developed for damage identification of guyed mast. Analysis results of a numerical example demonstrate that, not only can the relative alteration of WCS at sensors distinguish single different degree damage and multi damages of the shaft, but also it can identify guy’s damage. The susceptivity of the index to damage can be enhanced by increasing excitation and the number of sensors. The damage identification of the index computed by displacement response is better than that computed by acceleration response.

关键词

损伤识别 / 桅杆 / Wigner-Ville Distribution / 交叉项 / 统计量

Key words

damage identification / guyed mast / Wigner-Ville Distribution / Cross-term / statistic

引用本文

导出引用
周 凌;程 华;王仲刚;黄双杰. 基于振动响应时频分析的桅杆损伤识别方法[J]. 振动与冲击, 2010, 29(1): 214-218
Zhou Ling;Cheng Hua;Wang Zhong-gang;Huang Shuang-jie. DAMAGE IDENTIFICATION METHOD FOR GUYED MAST BASED ON TIME-FREQUENCY ANALYSIS OF VIBRATION RESPONSE[J]. Journal of Vibration and Shock, 2010, 29(1): 214-218

PDF(1554 KB)

Accesses

Citation

Detail

段落导航
相关文章

/