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A dynamic substructuring-based parametric reduced-order model considering the interpolation of free-interface substructural modes

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Abstract

A parametric reduced-order model (PROM) was developed by using a free-interface coupling method. For dynamic substructuring, the accuracy of the free-interface assembly is generally higher than that of the fixed interface one in a low frequency range, since it considers free-interface normal modes and rigid-body modes of each substructures. Therefore, by using the free-interface coupling method, we can enhance the accuracy of the PROM developed previously, in particular, the one formulated with a primal assembly. One important characteristic to retain the efficiency of PROM in the free-interface assembly is that the interpolation of substructural modes should be discriminated considering the characteristics of the modes. In the present work, we newly suggest a strategy for interpolating free-interface mode according to the change of parameter values. To verify the accuracy of the proposed PROM, we investigated the accuracy of the eigenvalues with a high-dimensional parametric input space.

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Authors and Affiliations

  1. School of Mechanical Engineering, Kyungnam University, Changwon, 51767, Korea

    Jaehun Lee

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  1. Jaehun Lee
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Correspondence to Jaehun Lee.

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Recommended by Associate Editor Seunghwa Yang

Jaehun Lee is an Assistant Professor at Kyungnam University, Changwon, Korea, since 2015. His Ph.D. in Mechanical and Aerospace Engineering is from Seoul National University in 2015. His major research fields are computational mechanics of solids and structures, in particular, parametric reduced-order modeling for large-scale systems, and analysis and design of laminated composites.

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Lee, J. A dynamic substructuring-based parametric reduced-order model considering the interpolation of free-interface substructural modes. J Mech Sci Technol 32, 5831–5838 (2018). https://doi.org/10.1007/s12206-018-1131-7

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  • DOI: https://doi.org/10.1007/s12206-018-1131-7

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