| dc.description.abstract | The present study aims to examine the acoustic characteristics of a metamaterial made from tungsten loaded thermoplastic polyurethane (TPU) using COMSOL simulations. The investigation encompasses the simulation of single spheres with varied sizes, consecutive spheres with a fixed displacement, and spheres with different radii. The findings suggest that alterations in the dimensions and arrangement of spheres have a notable impact on resonance frequencies and acoustic absorption bandwidth. The objective of this study is to attain a broader absorption bandwidth at a frequency of 55 kHz. The simulations conducted in this research illustrate the possibility of modifying the parameters of the sphere to fulfil this objective.
Moreover, the thesis investigates the implications of employing two spheres with different sizes within a singular simulation, thereby uncovering the possibility of generating wider peaks and enhanced bandwidth. The inquiry additionally explores the correlation between the spacing of two distinct spheres and the resultant bandwidth, thereby offering valuable insights into the phenomenon of coupling.
In summary, this study makes a scholarly contribution to the advancement of optimum backing materials for underwater acoustic transducers. It provides an investigation into the impact of geometric parameters on acoustic behaviour. The results indicate that there are viable methods for customizing metamaterials to target specific frequency ranges, which could have potential uses in areas such as underwater exploration, navigation, and sonar systems. | |
