دورية أكاديمية
Defect modes in imperfect periodic structures
| العنوان: | Defect modes in imperfect periodic structures |
|---|---|
| المؤلفون: | Li, Yilun, Cottereau, Régis, Tie, Bing |
| المساهمون: | Laboratoire de Mécanique Paris-Saclay (LMPS), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay), Laboratoire de Mécanique et d'Acoustique Marseille (LMA ), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | ISSN: 1742-6596 ; EISSN: 1742-6588. |
| بيانات النشر: | HAL CCSD IOP Science |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Elastic wave propagation, imperfect periodic structures, dispersion relation and defect modes, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], [PHYS.PHYS.PHYS-COMP-PH]Physics [physics]/Physics [physics]/Computational Physics [physics.comp-ph] |
| الوصف: | International audience ; Lack of periodicity in engineering structures can arise because of imperfections in the production process or a particular purpose to produce desirable physical effects. This contribution presents a series of numerical simulations that quantitatively characterize the influence of defects on the dispersion relation and associated eigenmodes of imperfect periodic structures. Local defects are introduced periodically on a scale larger than the size of the unit cell of the non-disturbed periodic structure. The observations reveal that these defects can give rise to non-propagating modes at frequencies situated within the bandgaps of the periodic structure. The eigenfrequency of such a defect mode varies monotonically with the amplitude of the defects, and its deformations are located in and around the disturbed cell. Furthermore, a bounded periodic medium with defects is studied by finite element analysis to demonstrate the existence of these defect modes in bounded imperfect periodic structures. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-04516732; https://hal.science/hal-04516732Test; https://hal.science/hal-04516732/documentTest; https://hal.science/hal-04516732/file/2024_JPCS_YLi.pdfTest |
| الإتاحة: | https://hal.science/hal-04516732Test https://hal.science/hal-04516732/documentTest https://hal.science/hal-04516732/file/2024_JPCS_YLi.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.43C60A1E |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |