Optimum Thermal Modes for Coupled Structural-Thermal Reduced Order Models

Murthy, Raghavendra; Wang, Xiaoquan; Matney, Andrew; Mignolet, Marc P.

doi:10.2514/6.2016-1709

Cited by 4 publications

(7 citation statements)

References 10 publications

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“…(1) a series of "optimum thermal modes" as defined in [7], i.e., temperature distributions that most strongly affect the structural ROM with temperature independent properties. As shown in [7], these modes are in fact derived from stress distributions associated with the structural modes selected, and…”

Section: Thermal Rom Basis Constructionmentioning

confidence: 99%

“…(3), the temperature of the panel may (often does) strongly affect the structural response. This observation recently motivated [7] the search for the temperature distributions that have a maximum effect on this response with the intent that these distributions should be included in the thermal basis so that the thermal-structural coupling is well captured by this basis. This effort was conducted for temperature independent properties and thus the terms which must be maximized are…”

Section: Optimum Thermal Modesmentioning

confidence: 99%

“…Following the methodology presented in [7], 44 optimum thermal modes from the linear stress distributions and 741 from the nonlinear ones were first selected. They were then modified as discussed above with the heated part of the panel being only the top of the skin.…”

Section: Optimum Thermal Modesmentioning

confidence: 99%

“…The construction of such ROMs has been the subject of continuous focus in the last few years, e.g., see [4][5][6][7], that has firmed up the process. One issue which remains challenging is the selection of the basis functions to be used to represent the temperature distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Proceeding in this manner would likely reduce the number of snapshots to be determined but also would provide robustness with respect to unexpected physics and/or a poor selection of the snapshots. This paper will propose such a basis and provide a first demonstration of it on the panel investigated in [1,[5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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A Construction of Thermal Basis Functions for Coupled Structural - Thermal Reduced Order Models

Murthy

Wang

Matney

et al. 2017

58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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The focus of this paper is on the formulation and assessment of a novel approach for the construction of a thermal basis to be used in coupled nonlinear geometric structural-thermal reduced order modeling efforts. The intent is to have this basis rely as little as possible on the existence of snapshots of the temperature distribution obtained by full order computations, i.e., finite element and CFD solutions, to reduce the numerical effort associated with their determination. To this end, the core of the basis is first constructed from the recently introduced optimum thermal modes which are the temperature distributions that most strongly affect the structural response and thus are independent of the applied heat flux. It is shown that this basis is not sufficient and thus a limited number of enrichments are introduced that do come from such full order computations and which complete the basis. The approach is demonstrated on a representative hypersonic panel in fully coupled aero-structural-thermal interaction.

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Section: Thermal Rom Basis Constructionmentioning

confidence: 99%

Section: Optimum Thermal Modesmentioning

confidence: 99%

Section: Optimum Thermal Modesmentioning

confidence: 99%