Analysis and Topology Optimization of Adaptive Sandwich Plates treated with Magnetorheological Elastomer core layer
Notice bibliographique
Résumé
Structural vibration control is a promising method for mitigating the detrimental effects of excessive vibration in structures. It involves monitoring the dynamic behavior of a structure and implementing control strategies to reduce the vibration levels of the structure. Among various control methodologies, the semi-active control method adeptly combines the reliability characteristic of passive systems with the adaptability inherent in fully active systems, without requiring complex control hardware. Smart materials play a crucial role in implementing semi-active vibration control, and among them, magnetorheological (MR) materials have garnered substantial attention for their remarkable properties, including rapid response times and low energy consumption. Compared with MR fluids (MRFs) which can only provide variable damping, Magnetorheological elastomers (MREs) have field dependent viscoelastic properties in which both stiffness and damping properties can be effectively altered using the applied magnetic field. By incorporating MREs into the core of sandwich plates, it becomes possible to modify the continuous plate's vibration characteristics on-demand through application of an external magnetic field. Although employing complete coverage of the MRE core layer within a sandwich plate is likely to yield the best results in reducing vibration levels, it is essential to consider practical factors like mass limitations. Therefore, optimizing the topology of the MRE layer with a constrained volume fraction is of practical importance. The goal of the topology optimization process is to attain the desired vibration control performance while concurrently minimizing the mass or volume of the MRE layer. This enables the efficient utilization of MRE-based vibration control systems in real-world applications, where optimizing resources is crucial. \nTo achieve this end, first a finite element model has been formulated to evaluate the vibration behavior of MRE-based sandwich plate under dynamic loading. The plate is discretized with rectangular elements, each having 28 degrees of freedom and 4 nodes, enabling accurate estimation of the MRE-based sandwich plate's vibration characteristics. \nAn optimization problem based on the method of moving asymptotes (MMA), is subsequently formulated to identify the optimal topology of the MRE layer within the sandwich plate to minimize dynamic compliance yielding reduction in vibration amplitude. For material properties interpolation, an MRE-based penalization (MREP) model, based on solid isotropic material with penalization (SIMP) method, has been developed. To validate the accuracy of the proposed methodology, several numerical examples considering MRE-based sandwich plates under different loading and boundary conditions are provided. These examples illustrate the effectiveness of the proposed design optimization methodology for topology optimization of MRE-based sandwich panels to mitigate the vibration.
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,002 | 0,002 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».