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Abstract 基于位移响应时间序列，提出了对结构动态载荷时间历程进行识别的区间方法。载荷在时域内可用一系列脉冲响应函数来表示，系统的响应是载荷与单位脉冲响应函数(Green函数)的卷积分。采用区间向量定量化不确定但有界的位移响应时间序列，并将Green函数离散，构造区间线性方程组。将载荷识别反问题转换为正问题，采用区间摄动法求解区间方程，从而得到待识别载荷时间历程的区间估计。通过不同测点下识别得到的载荷区间进行求交运算，改进识别结果。通过一个十杆桁架系统的载荷识别问题，说明了本文方法的可行性和有效性。
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Received: 24 July 2009
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2011, Vol. 32 
