基于随机减量技术的混凝土结构模态参数识别

Modal Parameters Identification of Concrete Beam Based on the Random Decrement Technique

本文针对时域方法只需实测响应信号的特点,对基于环境激励下模态参数识别的时域方法ITD法、随机减量技术进行详细讨论,并针对两种算法的特点,将其结合形成随机减量技术/ITD时域联合算法,使之有效识别环境激励下结构模态参数,并建立混凝土连续梁结构数值模型进行仿真模拟,验证了算法的可行性,为工程实践提供了有益的帮助.

On account of the feature that time-domain method only need actual response signals,the ITD and random decrement technique based on ambient excitation are discussed.Two methods are combined to become a kind of time-domain joint algorithm for structural modal parameter identification effectively.The numerical simulations of a concrete continuous beam are carried out to verify the feasibility of time-domain joint algorithm.The study has important theoretical significance and practical engineering value.