축소 모델의 동적 거동 해석을 위한 등기하해석법 적용에 대한 연구

Using isogeometric analysis(IGA) gives more accurate results for higher order mode in eigenvalue problem than using the finiteelement method(FEM). This is because the FEM has C0 continuity between elements, whereas IGA guarantee CP-1 between elementsfor p-th order basis functions. In this paper, a mode based reduced model is constructed by using IGA and dynamic behavioranalysis is performed using this advantage. Craig-Bampton(CB) method is applied to construct the reduced model. Several numericalexamples were performed to compare the eigenvalue analysis results for various order of element basis function by applying the IGAand FEM to simple rod analysis. We have confirmed that numerical error increases in the higher order mode as the continuitybetween elements decreases in the IGA by allowing internal knots multiplicity. The accuracy of the solution can be improved byusing the IGA with high inter-element continuity when high-frequency external force acts on the reduced model for dynamicbehavior analysis.