【摘要】 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自然激励技术(NExT)、特征系统实现算法(ERA)进行详细讨论,并针对两种算法的特点,将其结合形成NExT/ERA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.更多还原

【Abstract】 On account of the feature that time-domain method only need actual response signals,the NExT and ERA 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.更多还原