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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Attenuation Characteristics of Plane Waves by Metabarriers with Negative Parameters
Metamaterials have come to the fore in the fields of electromagnetics and acoustics due to their superior performance in targeted frequency ranges. However, the related application such as in vibration mitigation in civil engineering is rare. In this paper, the dispersion relation of a new kind of metabarriers is obtained according to the theory of periodic structure in solid mechanics. The dispersion of the metabarriers is generated by local resonance. A simplified model is established to explain the mechanism of bandgaps. The effective mass density, effective shear modulus and effective bulk modulus of the metabarriers are calculated by finite element method. It is found that the resonance of the oscillator produces a negative effective mass density, which prevents the wave propagating in soil, thus creating bandgaps. At this point, the effective shear modulus and effective bulk modulus of the metabarriers are both positive. The findings of this paper are beneficial for the design of periodic pile barriers to isolate elastic waves propagating in soil.
Attenuation Characteristics of Plane Waves by Metabarriers with Negative Parameters
Metamaterials have come to the fore in the fields of electromagnetics and acoustics due to their superior performance in targeted frequency ranges. However, the related application such as in vibration mitigation in civil engineering is rare. In this paper, the dispersion relation of a new kind of metabarriers is obtained according to the theory of periodic structure in solid mechanics. The dispersion of the metabarriers is generated by local resonance. A simplified model is established to explain the mechanism of bandgaps. The effective mass density, effective shear modulus and effective bulk modulus of the metabarriers are calculated by finite element method. It is found that the resonance of the oscillator produces a negative effective mass density, which prevents the wave propagating in soil, thus creating bandgaps. At this point, the effective shear modulus and effective bulk modulus of the metabarriers are both positive. The findings of this paper are beneficial for the design of periodic pile barriers to isolate elastic waves propagating in soil.
Attenuation Characteristics of Plane Waves by Metabarriers with Negative Parameters
Lecture Notes in Civil Engineering
Tutumluer, Erol (Herausgeber:in) / Nazarian, Soheil (Herausgeber:in) / Al-Qadi, Imad (Herausgeber:in) / Qamhia, Issam I.A. (Herausgeber:in) / Zhou, Jiahua (Autor:in) / Pu, Xingbo (Autor:in) / Shi, Zhifei (Autor:in)
17.09.2021
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Propagation Attenuation of Plane Waves in Saturated Soil by Pile Barriers
| Online Contents | 2017
Attenuation of sea waves with depth
| Engineering Index Backfile | 1957