A motion formalism approach to modal reduction for flexible multibody system applications

Design; Deformation measures; Flexible multibody systems; Geometric non-linearity; Kinematic joints; Multi Body Systems; Nonlinear problems; Position and orientations; Refactorization; Kinematics

Abstract :

[en] Multibody systems are often modeled as interconnected multibody and modal components: multibody components, such as rigid bodies, beams, plates, and kinematic joints, are treated via multibody techniques whereas the modal components are handled via a modal reduction approach based on the small strain assumption. In this work, the problem is formulated within the framework of the motion formalism. The kinematic description involves simple, straightforward frame transformations and leads naturally to consistent deformation measures. Derivatives are expressed in local frames, which results in the remarkable property that the tangent matrices are independent of the position and orientation of the modal component with respect to an inertia frame. This implies a reduced level of geometric non-linearity as compared to standard description. In particular, geometrically non-linear problems can be solved with the tangent matrices of the reference configuration, without re-evaluation and re-factorization. Copyright © 2018 ASME

Disciplines :

Mechanical engineering

Author, co-author :

Sonneville, Valentin; Department of Aerospace Engineering, University of Maryland, College Park, United States

Bauchau, Olivier A.; Department of Aerospace Engineering, University of Maryland, College Park, United States

Bruls, Olivier ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques

Language :

English

Title :

A motion formalism approach to modal reduction for flexible multibody system applications

Publication date :

2018

Event name :

ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2018

Event date :

26 August 2018 through 29 August 2018

By request :

Yes

Audience :

International

Journal title :

Proceedings of the ASME Design Engineering Technical Conference

Publisher :

American Society of Mechanical Engineers (ASME)

Volume :

Peer reviewed :

Peer reviewed

Commentary :

9780791851838

Available on ORBi :

since 16 June 2020

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