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Numerical Investigation of an Electromechanical Internally Resonating Metamaterial
In this thesis an electromechanical acoustic metamaterial for vibration attenuation is investigated numerically. Based on previous work different topologies are assessed on their dynamic behavior concerning wave propagation and frequency response.
Metamaterials are a novel approach to introduce active or passive structural damping in aerospace applications. They are composed of artificial micrometric atoms, e.g. lattice-like unit cells. A material composed of these artificial atoms can have material properties that are not found in classical materials, it can for example negative Poisson ratio or band gaps in the mechanical wave transmission behavior.
In this work a metamaterial containing local resonators in its unit cells is investigated. These local resonators can be tuned to specific frequencies by adjusting mass and stiffness of the different components of the unit cells. During this thesis the influence of the different parameters of the metamaterial such as the size and the geometry of the unit cells shall be optimized in order to maximize the vibration attenuation and minimize the weight penalty while maintaining the stiffness of the material.
Metamaterials are a novel approach to introduce active or passive structural damping in aerospace applications. They are composed of artificial micrometric atoms, e.g. lattice-like unit cells. A material composed of these artificial atoms can have material properties that are not found in classical materials, it can for example negative Poisson ratio or band gaps in the mechanical wave transmission behavior.
In this work a metamaterial containing local resonators in its unit cells is investigated. These local resonators can be tuned to specific frequencies by adjusting mass and stiffness of the different components of the unit cells. During this thesis the influence of the different parameters of the metamaterial such as the size and the geometry of the unit cells shall be optimized in order to maximize the vibration attenuation and minimize the weight penalty while maintaining the stiffness of the material.
- Expand an existing MATLAB model to investigate different unit cell topologies
- Find advantageous topologies for the task of vibration attenuation in beam structures
- Draft of a prototype Design
- Expand an existing MATLAB model to investigate different unit cell topologies - Find advantageous topologies for the task of vibration attenuation in beam structures - Draft of a prototype Design
ETH Zürich
Jascha Schmied
LEE O 205
Leonhardstrasse 21
8092 Zürich
Phone: +41 44 633 87 40
Mail: jschmied@ethz.ch
ETH Zürich Jascha Schmied LEE O 205 Leonhardstrasse 21 8092 Zürich