Affiliations: [a] State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an, Shaanxi, China | [b] Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang, Sichuan, China
Correspondence:
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Corresponding author: Shilin Xie, State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China. E-mail:slxie@mail.xjtu.edu.cn
Abstract: The strain (or stress) responses of structures are
generally of primary concern because they can provide an important
reference to the assessment of structure failure modes as well recognized.
The response surface method (RSM) is employed in strain response-based
finite element model updating in the paper. The model updating procedures
are outlined and the approach is then applied to a simply supported beam
model. In addition, the traditional updating method (sensitivity-based
method) is compared with the RSM method. The results show that response
surface models can accurately reflect the relationships between design
parameters and characteristic quantities and thus possesses better strain
response correction performance than the traditional method. Besides that,
the RSM based model updating by modifying boundary conditions is conducted,
which is difficult to achieve with the sensitivity-based method. The model
updating based on measured data validates the effectiveness and accuracy of
the present method.
Keywords: Strain response, response surface method, model updating, optimization
