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المؤلفAbdeljaber, Osama
المؤلفAvci, Onur
المؤلفInman, Daniel J.
تاريخ الإتاحة2021-09-01T10:03:35Z
تاريخ النشر2016
اسم المنشورJournal of Sound and Vibration
المصدرScopus
معرّف المصادر الموحدhttp://dx.doi.org/10.1016/j.jsv.2015.11.048
معرّف المصادر الموحدhttp://hdl.handle.net/10576/22516
الملخصOne of the major challenges in civil, mechanical, and aerospace engineering is to develop vibration suppression systems with high efficiency and low cost. Recent studies have shown that high damping performance at broadband frequencies can be achieved by incorporating periodic inserts with tunable dynamic properties as internal resonators in structural systems. Structures featuring these kinds of inserts are referred to as metamaterials inspired structures or metastructures. Chiral lattice inserts exhibit unique characteristics such as frequency bandgaps which can be tuned by varying the parameters that define the lattice topology. Recent analytical and experimental investigations have shown that broadband vibration attenuation can be achieved by including chiral lattices as internal resonators in beam-like structures. However, these studies have suggested that the performance of chiral lattice inserts can be maximized by utilizing an efficient optimization technique to obtain the optimal topology of the inserted lattice. In this study, an automated optimization procedure based on a genetic algorithm is applied to obtain the optimal set of parameters that will result in chiral lattice inserts tuned properly to reduce the global vibration levels of a finite-sized beam. Genetic algorithms are considered in this study due to their capability of dealing with complex and insufficiently understood optimization problems. In the optimization process, the basic parameters that govern the geometry of periodic chiral lattices including the number of circular nodes, the thickness of the ligaments, and the characteristic angle are considered. Additionally, a new set of parameters is introduced to enable the optimization process to explore non-periodic chiral designs. Numerical simulations are carried out to demonstrate the efficiency of the optimization process.
راعي المشروعThe financial support for this research was provided by Qatar National Research Fund , QNRF (a member of Qatar Foundation) via the National Priorities Research Program (NPRP), Project number NPRP 6-526-2-218 . Daniel J. Inman's work is supported in part by the U.S. Air Force Office of Scientific Research under the Grant number FA9550-14-1-0246 Electronic Damping in Multifunctional Material Systems monitored by Dr. B.L. Lee. The statements made herein are solely the responsibility of the authors.
اللغةen
الناشرAcademic Press
الموضوعAlgorithms
Cost engineering
Efficiency
Genetic algorithms
Lattice vibrations
Resonators
Shape optimization
Topology
Vibration analysis
Vibrations (mechanical)
Automated optimization
Beam-like structures
Broadband frequency
Characteristic angle
Experimental investigations
Optimization problems
Optimization techniques
Vibration suppression
Optimization
العنوانOptimization of chiral lattice based metastructures for broadband vibration suppression using genetic algorithms
النوعArticle
الصفحات50-62
رقم المجلد369
dc.accessType Abstract Only


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