5. C modeling

5.1. Characteristics of modeling

As in the previous modeling (modeling B), the structure is damped with the same proportional damping and the same Rayleigh coefficients (cf. [§ 5.1]).

The difference lies in the use of a method of dynamic condensation of the right part of the structure (this time comprising 6 elements) which is then represented by a dynamic macro-sub-structuring element. The dynamic problem is solved on a mixed model consisting of the macro-element of the right part of the structure where the applied force is exerted and a physical model reduced to its left part comprising 4 elements where there is an embedment.

5.2. Characteristics of the mesh

The mesh used is the initial complete mesh (see §1.1) obtained by duplicating and then assembling the modeling A mesh, which gives 10 elements and 11 nodes.

5.3. Tested features

We test the dynamic calculation functionalities with condensation of a part of the structure as well as the reproduction in physical space.

5.4. Tested sizes and results

The results are reproduced on the complete initial mesh combining the two substructures of the previous models. The end node corresponds to node \(\mathit{N10}\) (cf. figure in §1.1). These are exactly the same as those in B modeling as expected.

Identification	Reference
(full model) »	Dynamic condensation	Difference (%)
Node \(\mathit{N10}\): move (\(m\))	—9.54882E—7	—9.54882E—7	< 0.1
Node \(\mathit{N10}\): speed (\({\mathit{m.s}}^{\mathrm{-}1}\))	1.22190E—3	1.22190E—3	< 0.1
Node \(\mathit{N10}\): acceleration (\({\mathit{m.s}}^{\mathrm{-}2}\))	—1.91712E+0	—1.91712E+0	< 0.1