Reduced-Order Modeling for Flexible Spacecraft Deployment and Dynamics

Marshall, Michael A.; Pellegrino, Sergio

doi:10.2514/6.2021-1385

Cited by 5 publications

(2 citation statements)

References 42 publications

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“…Reduced-order models (ROMs) based on a modal approach are used in many structural engineering problems such as wind turbine blades (Hansen, 2015), aircraft wings (Bisplinghoff et al, 2013) and spacecraft (Marshall and Pellegrino, 2021) due to their computational efficiency and reasonable accuracy. These ROMs are based on the smalldeflection assumption; in other words they use constant stiffness, mass and damping matrices which are not updated by deflections unlike nonlinear models.…”

Section: Introductionmentioning

confidence: 99%

A correction method for large deflections of cantilever beams with a modal approach

Gözcü¹,

Barlas²,

Dou

2023

Wind Energ. Sci.

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Abstract. Modal-based reduced-order models are preferred for modeling structures due to their computational efficiency in engineering problems. One of the important limitations of the classic modal approaches is that they are geometrically linear. This study proposes a fast correction method to account for geometric nonlinearities which stem from large deflections in cantilever beams. The method relies on pre-computed correction terms and thus adds negligibly small extra computational efforts during the time domain response analyses. The accuracy of the method is examined on a straight-beam model and International Energy Agency (IEA) 15 MW wind turbine blade model. The results show that the proposed method increases the accuracy of modal approaches significantly in secondary deflections due to nonlinearities such as axial and torsional motions for the two studied cases.

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Section: Introductionmentioning

confidence: 99%

A correction method for large deflections of cantilever beams with a modal approach

Gözcü¹,

Barlas²,

Dou

2023

Wind Energ. Sci.

View full text Add to dashboard Cite

show abstract

“…Reduced order models (ROMs) based on modal approach is used in many structural engineering problems such as wind turbine blades (Hansen, 2015), aircraft wings (Bisplinghoff et al, 2013), space crafts (Marshall and Pellegrino, 2021) due to their computational efficiency and reasonable accuracy. Most of the existing ROMs are based on the small deflection assumption, in other words the stiffness, mass and damping matrices are not updated by deflections.…”

Section: Introductionmentioning

confidence: 99%

A correction method for large deflections of cantilever beams with modal approach

Gözcü

Barlas²,

Dou

2022

Preprint

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Abstract. Modal based reduced order models are preferred for modelling structures in engineering problems due to their computational efficiency. One of the important limitations of the classic modal based models is that they are linear and thus can not fully account for the nonlinearities in structures. This study proposes a fast correction method to account for geometric nonlinearities linked to large deflections in cantilever beam-like engineering structures. The large deflections cause secondary motions such as axial and torsional motions when the structures go through bending deflections. The method relies on pre-computed correction terms and thus adds negligibly small extra computational cost to the time domain analyses of the dynamic response. The accuracy of the method is examined on a straight beam benchmark model and an engineering wind blade model for the IEA 15 MW wind turbine. The results show that the proposed method increases the accuracy of modal approach significantly in estimating the secondary motions in comparison to the conventional modal based linear models.

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Aeroelastic Analysis Considering the Coupling Effect Between the Reference and Elastic Displacements in Flexible Multibody Dynamics

Nguyen,

Rho,

Pyeon

et al. 2023

Int. J. Aeronaut. Space Sci.

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Reduced-Order Modeling for Flexible Spacecraft Deployment and Dynamics

Cited by 5 publications

References 42 publications

A correction method for large deflections of cantilever beams with a modal approach

A correction method for large deflections of cantilever beams with a modal approach

A correction method for large deflections of cantilever beams with modal approach

Aeroelastic Analysis Considering the Coupling Effect Between the Reference and Elastic Displacements in Flexible Multibody Dynamics

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