Ali Ihsan Adham
A PhD Fellow at the University of Auckland and a Senior Specialist in the Department of Monitoring and Analyses of Existing Structures at Ramboll A/S in Denmark, with over 10 years of experience in Structural Dynamics, Structural Monitoring, and Vibration Measurements. Specializes in team leadership, technical consultancy, and conducting measurement campaigns on various structures. Experienced in data analysis and numerical simulations in Python, MATLAB, VBA, and commercial Finite Element software.
PhD project:
The doctoral research project focuses on graded metamaterials, specifically finite elastic structures with nonuniform neutralizers, where multiple properties of the neutralizers vary independently. The primary objective is to explore the potential for achieving broadband vibration attenuation. Using the wave approach as the theoretical basis, the study aims to assess how the properties of the neutralizers influence the vibration isolation performance in finite structures, such as axial rods and beams, in terms of both magnitude and bandwidth of attenuation.
Furthermore, an analytical framework is developed for designing finite structures with tailored vibration isolation capabilities. Practically, this involves reducing vibration transmissibility within specific frequency ranges by tuning the neutralizers’ mass, stiffness, damping, and position.
Experimental work has shown promising results, particularly highlighting the innovative aspect of nonuniform neutralizers. By strategically tuning and placing these neutralizers, broadband attenuation has been achieved without introducing new amplification to the system.