文献类型：期刊文献

中文题名：结构损伤识别的改进柔度灵敏度方法研究

英文题名：An improved flexibility sensitivity method for structural damage detection

作者：杨秋伟[1];孙斌祥[1]

机构：[1]绍兴文理学院土木工程系

年份：2011

卷号：30

期号：5

起止页码：27

中文期刊名：振动与冲击

外文期刊名：Journal of Vibration and Shock

收录：CSTPCD、、EI(收录号：20112614094165)、Scopus(收录号：2-s2.0-79959523803)、CSCD2011_2012、北大核心2008、北大核心、CSCD

基金：浙江省自然科学基金项目(Y1110949);绍兴市科技计划重点项目(2010A23006);国家自然科学基金项目(40772194)

语种：中文

中文关键词：损伤识别;柔度灵敏度;“加速”公式

外文关键词：damage detection; flexibility sensitivity; accelerating formula

中文摘要：提出一种改进的柔度灵敏度方法用于工程结构损伤识别。通过在迭代算法中引入一个"加速"公式来迅速获得足够精确的识别结果,避免了多次迭代,可以大大减少计算花费。用两个数值算例对所提方法进行了验证,并把结果和原柔度灵敏度方法的计算结果进行比较。结果表明:采用改进的算法一般只需经过一次计算即可获得很高精度的识别结果,而采用原方法必须经过多次迭代才能获得相同精度的识别结果。改进的方法比原方法大大减少了迭代次数,显著减少了计算花费,显示了改进方法的突出优越性。

外文摘要：Structural damage identification based on an improved sensitivity technique of structural flexibility was studied here.The drawback of the existing sensitivity methods was discussed firstly and then an improved technique was presented.The significant contribution of this study was to induce a simple accelerating formula in to iteration processes.With the introduction of the accelerating formula,the proposed method was able to identify damages without any high-order analysis of flexibility or multi-iteration.The effectiveness of the proposed method was illustrated using simulated data with measurement noise of two numerical examples.The results showed that the proposed procedure is economical for computation and simple to implement;regardless of damages being small or large,the proposed method can identify both locations and levels of structural damages accurately only using one iteration;the presented scheme may be useful for structural damage identification.