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基于Kriging模型的频响函数有限元模型修正方法
Kriging model based finite element model updating method using frequency response function
投稿时间:2017-03-03  修订日期:2017-04-13
DOI:
中文关键词:  模型修正  Kriging  有限元分析  频响函数  损伤识别
英文关键词:model updating  Kriging  finite element analysis  frequency response function  damage identification
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
杨修铭 大连理工大学 allalongyxm@163.com 
郭杏林 大连理工大学 xlguo@dlut.edu.cn 
李东升 大连理工大学  
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中文摘要:
      针对使用频响函数进行有限元模型修正的问题,提出了一种基于Kriging模型的修正方法,用于检测结构由损伤引起的在单元刚度特性上的衰减。该方法可以在不需要推导修正参数与频响函数残差的代数关系的前提下,通过少量测点提供的有效数据快速求解。还可以通过控制算法的终止准则来提高对未知区域的探索程度,降低结果收敛到局部解上的可能。使用Kriging模型可以有效地减少原有限元模型的计算次数,在保证了计算效率的同时,为对结构进行更准确精密的有限元建模提供了便利。
英文摘要:
      Aiming at the problem of finite element model updating using frequency response function, a Kriging model based model updating method is proposed to detect the loss of element stiffness of the structure caused by damage. The method can get results quickly by the data provided by a small number of measuring points without deriving the algebraic relationship between the updated parameters and the residuals of the frequency response function. The method can also improve the exploration degree of the unknown region and reduce the possibility that the result converges to a local solution by controlling the stopping criterion of the algorithm. Using Kriging model can effectively reduce the number of calculations of the original finite element model. While ensuring the efficiency of the calculation, it makes it convenient to construct a more accurate finite element model of the structure.
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