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Panel Flutter Emulation Using a Few Concentrated Forces

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Abstract

The objective of this paper is to study the feasibility of panel flutter emulation using a few concentrated forces. The concentrated forces are considered to be equivalent to aerodynamic forces. The equivalence is carried out using surface spline method and principle of virtual work. The structural modeling of the plate is based on the classical plate theory and the aerodynamic modeling is based on the piston theory. The present approach differs from the linear panel flutter analysis in scheming the modal aerodynamics forces with unchanged structural properties. The solutions for the flutter problem are obtained numerically using the standard eigenvalue procedure. A few concentrated forces were considered with an optimization effort to decide their optimal locations. The optimization process is based on minimizing the error between the flutter bounds from emulated and linear flutter analysis method. The emulated flutter results for the square plate of four different boundary conditions using six concentrated forces are obtained with minimal error to the reference value. The results demonstrated the workability and viability of using concentrated forces in emulating real panel flutter. In addition, the paper includes the parametric studies of linear panel flutter whose proper literatures are not available.

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Acknowledgements

The work is performed under High-Speed Vehicle Research Center (HVRC) Program, funded by Defense Acquisition Program Administration (DAPA) and Agency for Defense Development (ADD).

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Authors and Affiliations

  1. Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea

    Kailash Dhital & Jae-Hung Han

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  1. Kailash Dhital
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  2. Jae-Hung Han
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Correspondence to Jae-Hung Han.

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Dhital, K., Han, JH. Panel Flutter Emulation Using a Few Concentrated Forces. JASS 19, 80–88 (2018). https://doi.org/10.1007/s42405-018-0009-3

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  • DOI: https://doi.org/10.1007/s42405-018-0009-3

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