建筑钢结构进展2013，Vol.15Issue(1)：50-56,7.
基于振动传递率的钢质导管架海洋平台结构损伤识别方法研究
Study on the Damage Identification Method of Steel Jacket Offshore Platform Based on Vibration Transmissibility Function
摘要
Abstract
During the application process of structural damage identification methods based on vibration, problems such as the excitation information is difficult to obtain, the measured modal parameters are incomplete, the method is dependent to FEM model will be encountered. So, in this paper, two node acceleration responses of the structure excited with the white noise are directly used to construct the vibration transmissibility function, and principal component analysis (PCA)is pursued to the amplitude of the vibration transmissibility for dimensionality reduction. The combinations of principal component variation before and after damage are used as the damage characteristic vectors, which are input into the BP neural network for damage identification, the influences of different degrees of noise during the damage identification are considered simultaneously. The results of numerical simulation and model experiment of offshore platform show that the method can identify the damage location and has reasonable noise resisting capability.关键词
损伤识别/振动传递率函数/主成份分析/钢质导管架海洋平台/BP神经网络Key words
damage identification/vibration transmissibility function/principal component analysis/steel jacket offshore platform/BP neural network分类
建筑与水利引用本文复制引用
刁延松,张启亮,孟冬梅..基于振动传递率的钢质导管架海洋平台结构损伤识别方法研究[J].建筑钢结构进展,2013,15(1):50-56,7.基金项目
国家自然科学基金(51179082),山东省自然科学基金(ZR2010EL035) （51179082）
