摘要
从振动测试角度研究了识别海洋平台结构损伤的方法,利用损伤前后振动信号的小波包能量谱中特征频带能量谱幅值的差异来识别结构的损伤,为验证方法的有效性,利用海洋平台模型进行了振动测试试验,在模型的某一杆件处预制损伤,针对完好和损伤2种工况进行了振动测试,并应用小波包方法进行分析。试验结果表明,基于振动测试的海洋平台结构损伤识别是可行的。
From the perspective of the vibration testing of structural damage identification method of offshore platform,the use of injury before and after the vibration signal using wavelet packet energy spectrum characteristic frequency bands between the amplitude of the energy spectrum to identify the structural damage,to verify the validity of the method,the use of offshore platform model Vibration test conducted tests in advance of a model at the pre-injury bar,both for good working conditions and damage the vibration test and wavelet packet analysis method.The results show that,based on vibration testing damage detection for offshore platform structures is feasible.
出处
《煤炭技术》
CAS
北大核心
2011年第8期207-209,共3页
Coal Technology
关键词
振动测试
小波包能量谱
模型试验
损伤识别
Vibration test
Wavelet packet energy spectrum
Model test
Damage Identification
