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在利用实测的结构动态特性修正结构分析模型中 ,针对实测低阶固有频率 ,固有振型含有测量误差 ,造成结构特征方程不适定性的问题 ,以及实测振型的坐标数比分析模型指定的坐标数少的问题 ,本文给出了直接利用结构的特征方程 ,修改结构分析模型和振型扩充的方法 .通过实例对方法的可靠性、有效性进行了验证
In the structure analysis model with the measured structural dynamic characteristics, aiming at the low natural frequency measured, the natural vibration mode contains the measurement error, the problem of ill-posed structure equation and the coordinate number ratio of the measured vibration model are analyzed. In this paper, the eigenvalue of structure is directly used to modify the structural analysis model and the method of modal expansion, and the reliability and validity of the method are verified by examples