南极普里兹湾附近73 关键词： 损伤识别； 有限元模型； 模态参数； 振型扩展 [gap=1045]Key words： damage detection; finite element model; modal parameters; mode shape expansion
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针对某三跨连续梁桥，对几种振型扩展与修正的方法进行了比较研究。
With applications to a three-span continuous beam bridge, the comparative of some methods of mode shape expansion and updating is researched.
由于实测信息的不完备，使得在利用传统的基于模型修正的数学方法进行结构损伤识别时，必须对结构的模型进行缩聚或对实测振型进行扩展。
For the measured information is far from complete, the model condensation or the mode shapes extension techniques have to be used in the traditional model updating method.
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