Jamie s'amuse avec la physique : Mise en place d'une analyse de fréquence

Welcome back to “Physics Fun with Jamie”. A frequency study in SOLIDWORKS FEA is a powerful tool for predicting the natural frequencies and mode shapes of a structure. It is used to identify any resonant frequencies that may lead to unwanted vibrations or failures. Here are some steps to follow when setting up a frequency study in SOLIDWORKS FEA.

1. Define the model: Define the 3D model of the structure you want to analyze. This can be done in SOLIDWORKS or imported from other CAD software.
2. Définir les propriétés des matériaux : attribuez les propriétés de matériaux appropriées au modèle. Les propriétés des matériaux doivent être définies avec précision afin de garantir des résultats fiables.
3. Define the loads and boundary conditions: Define the loads and boundary conditions that the model will experience in its operating environment. In a frequency study, the load should be zero.
4. Générer le maillage : générez le maillage du modèle. La taille et le type du maillage doivent être choisis en fonction de la complexité du modèle et du niveau de précision requis.
5. Choose the frequency analysis type: Select the frequency analysis type in the SOLIDWORKS FEA menu. SOLIDWORKS FEA provides different options for frequency analysis, including linear frequency and nonlinear frequency.
6. Définir les options du solveur : définissez les options du solveur dans le menu SOLIDWORKS FEA, notamment les critères de convergence, le nombre maximal d'itérations et d'autres options.
7. Run the analysis: Run the frequency analysis and review the results. SOLIDWORKS FEA provides graphical representations of the results, including natural frequencies and mode shapes.
8. Evaluate the results: Evaluate the results by comparing the natural frequencies with the applied loads. If the natural frequency of the structure is close to the frequency of the applied load, then there is a risk of resonance.
9. Affiner le modèle : affinez le modèle en ajustant les charges, les conditions aux limites ou les propriétés des matériaux, puis relancez l'analyse.
10. Finalize the design: Finalize the design by adjusting the geometry or material properties to avoid resonant frequencies and unwanted vibrations.

In conclusion, setting up a frequency study in SOLIDWORKS FEA is critical in evaluating the natural frequencies and mode shapes of a structure. By following these steps, you can ensure that your frequency study is accurate, efficient, and effective in avoiding unwanted vibrations and failures in your design.