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Title |
Finite Element Model Updating of Simple Beam Considering Boundary Conditions
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Authors |
김세훈(Se-Hoon Kim) ; 박영수(Young-Soo Park) ; 김남규(Nam-Gyu Kim) ; 이종재(Jong-Jae Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.2.076 |
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Keywords |
유한요소모델 개선 ; 경계조건 ; 인공신경망 ; 구조 응답 Finite element model updating ; Boundary condition ; Neural network ; Structural response |
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Abstract |
In this present study, in order to update the finite element model considering the boundary conditions, a method has been proposed. The conventional finite element model updating method, updates the finite element model by using the dynamic characteristics (natural frequency, mode shape) which can be estimated from the ambient vibration test. Therefore, prediction of the static response of an actual structure is difficult. Furthermore, accurate estimation of the physical properties is relatively hard. A novel method has been proposed to overcome the limitations of conventional method. Initially, the proposed method estimates the rotational spring constant of a finite element model using the deflection of structure and the rotational displacement of support measurements. The final updated finite element model is constructed by estimating the material properties of the structure using the finite element model with updated rotational spring constant and the dynamic characteristics of the structure. The proposed finite element model updating method is validated through numerical simulation and compared with the conventional finite element model updating method.
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