论文部分内容阅读
提出了一种利用不完整模态多数估计结构损伤的方法。不完整模态体现在模态数少于自由度数，测点数少于自由度数。通过不完整模态参数建立了完整的剪切型模型，然后利用结构变化后产生的广义残余力来估计结构的损伤。该方法的优点：（１）不仅可以估计刚度损伤还可以估计质量的变＊化；（２）利用的是不完整模态。最后用该方法对一个结构模型的振动台试验的结果做了分析。
A method for estimating structural damage using an incomplete modal majority is proposed. The incomplete mode is reflected in the number of modes less than the degree of freedom, and the number of measurement points is less than the number of degrees of freedom. A complete shear model is established by incomplete modal parameters, and then the structural damage is estimated by using the generalized residual forces generated after structural changes. The advantages of this method: (1) It is not only possible to estimate the stiffness damage but also to estimate the change of the quality; (2) to use the incomplete mode. Finally, the results of shaking table tests of a structural model were analyzed using this method.