摘要
通过实验及信号处理的手段,研究了声发射信号沿海洋平台传播的特性与规律。开展海洋平台声发射监测实验得到声发射信号时域波形等数据,利用特征参数分析几何尺寸、管节点、信号源与传感器相对位置等因素对声发射信号衰减规律的影响,并采用小波包能量谱方法确定信号衰减的频域特征。
Investigation on the propagation characteristics and laws of Acoustic Emission （AE） in the offshore platform structural system was proposed in this paper. The AE monito- ring experiment of offshore platform was conducted, and data acquisition and parameters ex- tracted were carried out for the AE signal. The effects of member geometric dimension and tu- bular joints on the attenuation rule of the AE signal was investigated, and the distribution mode of signal on the surface of the member was also analyzed. Wavelet packet energy spec- trum method was used to determine the main frequency properties of the attenuated AE sig- nal.
出处
《中国海洋平台》
2013年第4期23-27,32,共6页
China offshore Platform
基金
国家自然科学基金课题(50679083)"面向老龄平台延寿工程的寿命预测与管理理论及方法研究"
中央高校基本科研业务费专项资金课题(10CX04028A)"考虑时变力学特征的复杂工况下自升式海洋平台动力灾变机理研究"
山东省自然科学基金课题(ZR2010EQ029)"自升式海上风电安装平台时变系统动力学行为及应用研究"联合资助研究
关键词
声发射信号
传播特性
信号处理
acoustic emission signal
propagation characteristics
signal processing
