The issue of model reduction is one that must often be overcome in order to perform the necessary checks as part of the spacecraft Finite Element Model (FEM) validation process. This work compares different reduction methods; specifically the popular and long-standing Guyan method, and the potentially more accurate System Equivalent Reduction Expansion Process (SEREP). The influence of sensor s...

We generalize the Guyan condensation of large symmetric eigenvalue problems to allow general degrees of freedom to be master variables. On one hand useful information from other condensation methods (such as Component Mode Synthesis) thus can be incorporated into the method. On the other hand this opens the way to iterative reenement of eigenvector approximations. Convergence of such a procedur...

2 Dynamic analysis is an important part of modern simulation strategy. However, finite element models are inherently high dimensional and, as a result, their dynamic analysis is computationally expensive. For this reason, it is impossible to include a finite element model directly into system level simulation where a device dynamic model should be simulated as a part of a whole system including...

A autora examina as principais ideias de Guyan, poeta e pensador francês do século XIX. Fortemente influenciado pelo positivismo, Guyau marca sua originalidade enquanto estudioso dos sentidos da arte considera o dinamismo social ao procurar entendimento que move a vida relação, sinalizando formas existências valorizadas. Annamaria Contini vai encontro sugere: coerções restritivas existência são...

A. Vroman*, G. Deschrijver*, M. De Munck**, D. Moens**, E. E. Kerre*, D. Vandepitte** *Department of Applied Mathematics and Computer Science, Ghent University Fuzziness and Uncertainty Modelling Research Unit Krijgslaan 281 (S9), B-9000 Gent, Belgium. E-mail: [email protected] Homepage: http://www.fuzzy.ugent.be **K.U.Leuven, Department of Mechanical Engineering, Celestijnenlaan 300 B, ...

For solving the eigenvalue problem of a structural system having a large number of degrees of freedom the authors introduced in 6] the improved condensation method using the Rayleigh functional of the exactly condensed nonlinear eigenvalue problem. In this paper we discuss the implementation of the method for substructured problems on a distributed memory MIMD Computer. Examples are presented w...

The subject of structural health monitoring and damage identification of structures at the earliest possible stage has been a noteworthy topic for researchers in the last years. Modal strain energy (MSE) based index is one of the efficient methods which are commonly used for detecting damage in structures. It is also more effective and economical to employ some methods for reducing the degrees ...

Order reduction of parametrically excited linear and nonlinear structural systems represented by a set of second order equations is considered. First, the system is converted into a second order system with time invariant linear system matrices and (for nonlinear systems) periodically modulated nonlinearities via the Lyapunov-Floquet transformation. Then a master-slave separation of degrees of ...