000013686 001__ 13686
000013686 005__ 20161114170127.0
000013686 04107 $$aeng
000013686 046__ $$k2011-05-25
000013686 100__ $$aGherlone, M.
000013686 24500 $$aDynamic Shape Reconstruction of Three-Dimensional Frame Structures Using the Inverse Finite Element Method

000013686 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013686 260__ $$bNational Technical University of Athens, 2011
000013686 506__ $$arestricted
000013686 520__ $$2eng$$aA robust and efficient computational method for reconstructing the threedimensional displacement field of truss, beam, and frame structures, using measured surfacestrain data, is presented. Known as “shape sensing”, this inverse problem has important implications for real-time actuation and control of smart structures, and for monitoring of structural integrity. The present formulation, based on the inverse Finite Element Method (iFEM), uses a least-squares variational principle involving strain measures of Timoshenko theory for stretching, torsion, bending, and transverse shear. Two inverse-frame finite elements are derived using the interdependent interpolations whose interior degrees-of-freedom are condensed out exactly at the element level. In addition, relationships between the order of kinematic-element interpolations and the number of required strain gauges are established. As an example problem, a thin-walled, circular cross-section cantilevered beam subjected to harmonic excitations in the presence of structural damping is modeled using iFEM; where, to simulate strain-gauge values and to provide reference displacements, a high-fidelity MSC/NASTRAN shell finite element model is used. Examples of low and high-frequency dynamic motion are analyzed and the solution accuracy examined with respect to the increased fidelity of the iFEM’s discretization and the number of strain gauges.

000013686 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013686 653__ $$aShape sensing, Frame structures, Inverse Finite Element Method, Strain gauge.

000013686 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013686 720__ $$aGherlone, M.$$iCerracchio, P.$$iMattone, M.$$iSciuva M., Di$$iTessler, A.
000013686 8560_ $$ffischerc@itam.cas.cz
000013686 8564_ $$s1128340$$uhttps://invenio.itam.cas.cz/record/13686/files/512.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 19 Progress and Challenges in Spacecraft Structural Dynamics.
000013686 962__ $$r13401
000013686 980__ $$aPAPER