000013251 001__ 13251
000013251 005__ 20161114160333.0
000013251 04107 $$aeng
000013251 046__ $$k2009-06-22
000013251 100__ $$aTheodosiou, C.
000013251 24500 $$aPeriodic steady state response of complex finite element models using multi-level substructuring

000013251 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013251 260__ $$bNational Technical University of Athens, 2009
000013251 506__ $$arestricted
000013251 520__ $$2eng$$aLong term dynamics of a class of mechanical systems is investigated in a computationally efficient way. Each structural component is first discretized by applying the finite element method. This results frequently in models with a quite large number of degrees of freedom. In addition, the composite system may possess strongly nonlinear properties. The method applied overcomes some of these difficulties by first imposing a multi-level substructuring procedure. As a result, the original dimension of the complete system is substantially reduced. Subsequently, this allows the application of numerical methodologies which are efficient for predicting response of small scale systems. In particular, a systematic method is applied next, leading to direct determination of periodic steady state response of nonlinear models subjected to periodic excitation. The stability properties of the located motions are also determined, while an appropriate continuation scheme is applied, leading to evaluation of complete branches of periodic solutions. Finally, a respresentative set of numerical results is presented for an internal combustion car engine and a complete city bus model.

000013251 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013251 653__ $$aPeriodic Steady State Response, Large Scale Finite Element Models, Multi-Level Dynamic Substructuring. Abstract. Long term dynamics of a class of mechanical systems is investigated in a computationally efficient way. Each structural component is first discretized by applying the finite element method. This results frequently in models with a quite large number of degrees of freedom. In addition, the composite system may possess strongly nonlinear properties. The method applied overcomes some of these difficulties by first imposing a multi-level substructuring procedure. As a result, the original dimension of the complete system is substantially reduced. Subsequently, this allows the application of numerical methodologies which are efficient for predicting response of small scale systems. In particular, a systematic method is applied next, leading to direct determination of periodic steady state response of nonlinear models subjected to periodic excitation. The stability properties of the located motions are also determined, while an appropriate continuation scheme is applied, leading to evaluation of complete branches of periodic solutions. Finally, a respresentative set of numerical results is presented for an internal combustion car engine and a complete city bus model.

000013251 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013251 720__ $$aTheodosiou, C.$$iSikellis, K.$$iNatsiavas, S.
000013251 8560_ $$ffischerc@itam.cas.cz
000013251 8564_ $$s435754$$uhttps://invenio.itam.cas.cz/record/13251/files/CD372.pdf$$yOriginal version of the author's contribution as presented on CD, section: Fem: modelling and simulation - i.
000013251 962__ $$r13074
000013251 980__ $$aPAPER