The periodic structure consists of repeating unit cells. Periodic structures can be found everywhere, from artificial multi-span bridges to naturally occurring atomic grids. Due to the high stiffness-to-weight ratio and economic cost, reinforced plate and shell structures are widely used in a variety of structural applications such as bridges, ship hulls and decks, aircraft, and aerospace rocket/missile structures. During manufacturing, friction stir welding periodically forms a wavy boundary. In building construction, the rebar used for reinforced concrete beams and slabs has a periodic surface. Determining the free vibration characteristics of a structural system can be a basic task of dynamic analysis. Over the last few decades, many researchers have discussed the behavior of reinforcing plates / shells under dynamic loads. This can lead to excellent implementations in the field of vibration and noise control. Periodic structures are also used to study the tunability of filter characteristics, such as required acoustic bandgap, cut-off frequency, and response direction. Health monitoring and damage detection of these structures requires a good understanding of the propagation of elastic waves through such periodic structures. In particular, the effect of periodicity on the movement of electromagnetic waves has been extensively studied and they have been applied to many optical and electromagnetic devices. The ability of periodic configurations to create electron / photonic bandgap in semiconductors and crystals is similar to the structural / acoustic bandgap of elastic media.
This topic is interesting for new potential applications in the fields of vibration acoustic isolation, noise suppression devices, vibration control, and seismic mitigation. Numerical and experimental studies of periodic structures, composite structures, phononic crystals, waveguides such as transmission lines, acoustic / elastic metamaterials. This marks the recent advances in these areas and the growing interest in academic and applied research.
Experimental studies on periodic structures have recently been published in many publications, verifying periodic effects such as structural and acoustic bandgap, attenuation, and directed energy flow in many specific cases.
Among the proposed numerical approaches, the one based on finite element theory shows great diversity and applicability in modeling physical structures. The numerical solution is based on the FE analysis of the unit cell of the structure and the theory of wave propagation in the periodic structure. This numerical method enables high accuracy up to high frequencies with very little computational effort and is a recommended option for predicting waves in one-dimensional and two-dimensional single waveguides (beams, plates and shells, cylindrical structures, etc.). Although these phenomena are well known, most published studies on periodic structures applied in the field of engineering aims to develop theoretical and numerical approaches to understanding wave propagation behavior and its properties.
The aim of the current Research Topic is to cover promising, recent, and novel research trends to study wave propagation in different forms of structures and materials. Themes include, but are not limited to:
- Modeling of periodic structures with local perturbations
- Dynamic analysis of periodic structures and elastic/acoustic metamaterials
- Dynamic behavior and acoustic analysis of arbitrary-shaped substructures
- Passive vibration control
- Reinforced concrete structures with damage
- Dynamics of phononic materials and structures
- Wave reciprocity in composite and metallic pressurised structures with defects
- Bloch waves of elastically connected periodic slender structures in an array
- Nonlinear periodic structures
The periodic structure consists of repeating unit cells. Periodic structures can be found everywhere, from artificial multi-span bridges to naturally occurring atomic grids. Due to the high stiffness-to-weight ratio and economic cost, reinforced plate and shell structures are widely used in a variety of structural applications such as bridges, ship hulls and decks, aircraft, and aerospace rocket/missile structures. During manufacturing, friction stir welding periodically forms a wavy boundary. In building construction, the rebar used for reinforced concrete beams and slabs has a periodic surface. Determining the free vibration characteristics of a structural system can be a basic task of dynamic analysis. Over the last few decades, many researchers have discussed the behavior of reinforcing plates / shells under dynamic loads. This can lead to excellent implementations in the field of vibration and noise control. Periodic structures are also used to study the tunability of filter characteristics, such as required acoustic bandgap, cut-off frequency, and response direction. Health monitoring and damage detection of these structures requires a good understanding of the propagation of elastic waves through such periodic structures. In particular, the effect of periodicity on the movement of electromagnetic waves has been extensively studied and they have been applied to many optical and electromagnetic devices. The ability of periodic configurations to create electron / photonic bandgap in semiconductors and crystals is similar to the structural / acoustic bandgap of elastic media.
This topic is interesting for new potential applications in the fields of vibration acoustic isolation, noise suppression devices, vibration control, and seismic mitigation. Numerical and experimental studies of periodic structures, composite structures, phononic crystals, waveguides such as transmission lines, acoustic / elastic metamaterials. This marks the recent advances in these areas and the growing interest in academic and applied research.
Experimental studies on periodic structures have recently been published in many publications, verifying periodic effects such as structural and acoustic bandgap, attenuation, and directed energy flow in many specific cases.
Among the proposed numerical approaches, the one based on finite element theory shows great diversity and applicability in modeling physical structures. The numerical solution is based on the FE analysis of the unit cell of the structure and the theory of wave propagation in the periodic structure. This numerical method enables high accuracy up to high frequencies with very little computational effort and is a recommended option for predicting waves in one-dimensional and two-dimensional single waveguides (beams, plates and shells, cylindrical structures, etc.). Although these phenomena are well known, most published studies on periodic structures applied in the field of engineering aims to develop theoretical and numerical approaches to understanding wave propagation behavior and its properties.
The aim of the current Research Topic is to cover promising, recent, and novel research trends to study wave propagation in different forms of structures and materials. Themes include, but are not limited to:
- Modeling of periodic structures with local perturbations
- Dynamic analysis of periodic structures and elastic/acoustic metamaterials
- Dynamic behavior and acoustic analysis of arbitrary-shaped substructures
- Passive vibration control
- Reinforced concrete structures with damage
- Dynamics of phononic materials and structures
- Wave reciprocity in composite and metallic pressurised structures with defects
- Bloch waves of elastically connected periodic slender structures in an array
- Nonlinear periodic structures
