The determination and enhancement of compliant modes for actuation in structural assemblies. (February 2017)

• Record Type: Journal Article
• Authors: Bird, James; Santer, Matthew; Morrison, Jonathan
• Is Part Of: International journal of solids and structures. Volume 106/107(2017)
• Page Start: 264
• Page End: 273
• Publication Date: 2017-02
• Subjects: Adaptive structures -- Kagome lattice -- SVD; 00-01 -- 99-00; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2016.11.006
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: Linear algebra methods for determining modes of kinematic and static indeterminacy in jointed frames are extended to reveal modes of compliance in otherwise rigid assemblies. These modes are extracted from a structural model, based on finite elements, via a singular value decomposition and yield the ways in which a structure can be most easily deformed. This modal approach also allows for the formulation of a reduced-order structural model, whereby relevant modes are selected and used as the basis for the optimisation of a complaint structure. The method detailed is shown to be a useful design tool, demonstrated by its application to a structure based on the Kagome lattice geometry. For certain frameworks, first order effects produce tightening under actuation. As a result, a scheme to adjust the modes to take nonlinear effects into account is also given.