摘要
将特征系统实现法(ERA)与CBSI算法相结合识别海洋平台结构的模态参数(固有频率,阻尼比,振型),利用有限的加速度信号进行结构模态参数识别。海洋平台结构数值模型模拟的动力响应信号用于参数识别。所识别出的海洋平台模态参数与有限元ANSYS分析所得的结果相比较,表明运用本文所提出的方法进行模态参数识别是有效的。
In this paper, the Eigensystem Realization Algorithm was applied in conjunction with the commonbased normalized structural identification (CBSI) to identify structural modal parameters (natural frequency, damp ratio, mode shape) with limited acceleration information. Simulated data from the numerical model of an offshore platform are used for the identification of the system. The identification results were compared with modal parameters of the offshore platform numerical model (FEM) by ANSYS. According to the results, the proposed method is effective for modal parameter identification.
出处
《海洋工程》
CSCD
北大核心
2003年第4期75-80,共6页
The Ocean Engineering
基金
国家十五"863"资助项目(2001AA602023)
高等学校博士点专项基金资助项目(200042302)
国家自然科学基金资助项目(50179014)
