Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-intrusive reduced order modelling for the dynamics of geometrically
  nonlinear flat structures using three-dimensional finite elements   Non-intrusive methods have been used since two decades to derive
reduced-order models for geometrically nonlinear structures, with a particular
emphasis on the so-called STiffness Evaluation Procedure (STEP), relying on the
static application of prescribed displacements in a finite-element context. We
show that a particularly slow convergence of the modal expansion is observed
when applying the method with 3D elements, because of nonlinear couplings
occurring with very high frequency modes involving 3D thickness deformations.
Focusing on the case of flat structures, we first show by computing all the
modes of the structure that a converged solution can be exhibited by using
either static condensation or normal form theory. We then show that static
modal derivatives provide the same solution with fewer calculations. Finally,
we propose a modified STEP, where the prescribed displacements are imposed
solely on specific degrees of freedom of the structure, and show that this
adjustment also provides efficiently a converged solution.

37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc