Nonlinear Structural Reduced Order Modeling Methods for Hypersonic Structures

Matney, Andrew; Perez, Ricardo A.; Spottswood, S. Michael; Wang, X.; Mignolet, Marc P.

doi:10.2514/6.2012-1972

Cited by 15 publications

(18 citation statements)

References 16 publications

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“…Modes commonly referred to as "duals" and "tangent duals" are included in the basis in order to capture this motion. For a more detailed description, see [11]. Finally, the thermal expansion resulting from the nonzero temperature fields will in general be different from the nonlinear motion induced by large transverse displacements.…”

Section: Rom Formulationmentioning

confidence: 97%

“…see [7] for a recent extensive review. However, the inclusion of thermal effects with the temperature itself represented in a reduced order form has recently been developed and validated [8][9][10][11][12].…”

Section: Background and Objectivesmentioning

confidence: 99%

“…A purely structural, isothermal reduced order model of the panel of Fig. 1 was first developed and validated using uniform static pressure loads and acoustic loading in [11]. Next, a basis for the thermal reduced order model was determined [12] that captures the temperature fields occurring in the one-way coupled trajectory analysis of [2].…”

Section: Background and Objectivesmentioning

confidence: 99%

“…Should the desired displacement/temperature fields not be represented well by the basis, the solution will not be satisfactory. The structural basis is considered first and is developed following the work of [11].…”

Section: Rom Formulationmentioning

confidence: 99%

See 3 more Smart Citations

Panel Response Prediction Through Reduced Order Models with Application to Hypersonic Aircraft

Matney

Mignolet

Culler

et al. 2015

56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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The present work is the culmination of a series of investigations by the authors on the construction and validation of structural, thermal, and coupled structural-thermal reduced order models (ROMs) for the prediction of the displacements and temperature fields on a representative panel of a hypersonic aircraft during a particular trajectory. The focus of the present paper is first on the development and validation of an efficient strategy for enriching the thermal ROM basis to reflect the temperature distribution induced by the structural deformations through changes of the aerodynamics. Next, the assembly of the thermal and structural ROM bases and the identification of their coefficients is revisited for both cases of constant and temperature dependent coefficient of thermal expansion. The coupled ROM predictions are finally compared to those obtained from full structural and thermal finite element models and it is seen that the ROMs perform overall very well over the large temperature change during the trajectory, from room temperature to 2300F. The only exception to the accuracy of the ROMs is a mode switching event occurring for one of the finite element models but not for the ROMs. This issue is under continued investigation.

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Section: Rom Formulationmentioning

confidence: 97%

Section: Background and Objectivesmentioning

confidence: 99%

Section: Background and Objectivesmentioning

confidence: 99%

Section: Rom Formulationmentioning

confidence: 99%

See 2 more Smart Citations

Panel Response Prediction Through Reduced Order Models with Application to Hypersonic Aircraft

Matney

Mignolet

Culler

et al. 2015

56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Self Cite

View full text Add to dashboard Cite

show abstract

“…Further, the coupling of these nonlinear structural reduced order models with aerodynamics, either full or reduced order model has also been successfully demonstrated in [15][16][17]. A similar coupling but of the structural dynamics and thermal aspects, the two in reduced order model format, has also been proposed and validated in [18][19][20][21]. In addition, validation studies with experiments have been carried out for different types of panels [3,[23][24].…”

Section: Introductionmentioning

confidence: 99%

Prediction of displacement and stress fields of a notched panel with geometric nonlinearity by reduced order modeling

Perez

Wang

Mignolet

2014

Journal of Sound and Vibration

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The focus of this investigation is on a first assessment of the predictive capabilities of nonlinear geometric reduced order models for the prediction of the large displacement and stress fields of panels with localized geometric defects, the case of a notch serving to exemplify the analysis. It is first demonstrated that the reduced order model of the notched panel does indeed provide a close match of the displacement and stress fields obtained from full finite element analyses for moderately large static and dynamic responses (peak displacement of 2 and 4 thicknesses). As might be expected, the reduced order model of the virgin panel would also yield a close approximation of the displacement field but not of the stress one. These observations then lead to two "enrichment" techniques seeking to superpose the notch effects on the virgin panel stress field so that a reduced order model of the latter can be used. A very good prediction of the full finite element stresses, for both static and dynamic analyses, is achieved with both enrichments.

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Optimal Representation of a Varying Temperature Field for Coupling with a Structural Reduced Order Model

Murthy

Matney

Wang

et al. 2016

Nonlinear Dynamics, Volume 1

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Nonlinear Structural Reduced Order Modeling Methods for Hypersonic Structures

Cited by 15 publications

References 16 publications

Panel Response Prediction Through Reduced Order Models with Application to Hypersonic Aircraft

Panel Response Prediction Through Reduced Order Models with Application to Hypersonic Aircraft

Prediction of displacement and stress fields of a notched panel with geometric nonlinearity by reduced order modeling

Optimal Representation of a Varying Temperature Field for Coupling with a Structural Reduced Order Model

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