3. Modeling A#
3.1. Characteristics of modeling#
In this modeling, we use the operator DYNA_VIBRA (see [U4.53.03]) with the relationship DIS_CHOC. The integration diagram is ADAPT_ORDRE2.
In this modeling, the force exerted on mass \({m}_{2}\) is cancelled out in \({t}_{2}=\mathrm{0,2}s\).
3.2. Characteristics of the mesh#
The mesh contains 2 discrete single-node meshes (one for each mass) and 1 discrete mesh for the spring.
3.3. Tested sizes and results#
Type |
Instant ( \(s\) ) |
Size |
Reference |
Aster |
Difference (%) |
|
Analytics |
0.02 |
|
2.0621E-05 |
|||
Analytics |
0.02 |
|
0.11221 |
0.11221 |
0.11221 |
0 |
Analytics |
0.15 |
|
1.35332 |
1.35329 |
-0.002 |
|
Analytics |
0.15 |
|
1.80751 |
1.80751 |
1.80751 |
0 |
Analytics |
0.34 |
|
-3.3802E-5 |
|||
Analytics |
0.34 |
|
3.96813 |
3.97012 |
0.05 |
Type |
Size (s) |
Reference |
Aster |
% difference |
Analytics |
\({t}_{1}\) |
0.03512 |
0.03520 |
0.23 |
Analytics |
\({t}_{3}\) |
0.31492 |
0.31500 |
0.03 |
3.4. notes#
The difference in \(\text{\%}\) is not given for cases where the reference value is 0, but it is observed that the absolute difference is of the order of \({10}^{-5}\).