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Dr Karim Ashari MEng, PhD

Assistant Professor, Aeronautics and Astronautics / Mechanical Engineering Lecturer

Dr Karim Ashari's photo

Dr. Karim Ashari graduated with a first-class honours Master of Engineering degree in Aerospace Engineering, before being awarded a PhD, both from the University of Southampton. He was the top student in his cohort in the final year of his undergraduate studies.

Prior to starting his PhD, he was an aircraft maintenance trainee. Karim studies wave dispersion in repetitive structures using mathematical and computational approaches in order to gain understanding of the underlying physics. Present research includes decaying waves in such structures. Apart from that, he is interested in application of acoustic black holes as a potentially lightweight solution to noise and vibration in industrial applications. He has wide teaching experience at UoSM, particularly in the delivery of Mechanical Engineering as well as Aeronautics and Astronautics programmes.

Research interests

  • Repetitive structures
  • Structural dynamics
  • Acoustic black hole


Sort via:TypeorYear
  • MATH1054/MATH1055 Mathematics For Engineering 
  • FEEG1004 Electrical and Electronics Systems 
  • SESA1015 Introduction to Aeronautics and Astronautics
  • FEEG2002 Mechanics, Machines & Vibration 

Title: Vibrational characteristics of repetitive structure embedded with acoustic black hole

Principal Investigator: Karim Ashari (open for PhD application)


Acoustic black hole (ABH) is a passive vibration control technique in which a structure is modified to have a tapering end of power-law profile. As an elastic wave travels into the taper, its speed decreases but its amplitude increases. A damping mechanisms can be attached to the tip to extract the vibrational energy. As such, the tapering profile acts like a vibration absorber. However, in practice, the tip of the fabricated profile will have a finite thickness which reflects the elastic wave, making it impractical as a vibration absorber. This project will focus on exploring how the ABH effect can be embedded in discrete repetitive structure in which negligible reflection at the tip end is potentially achievable.


ABH effect embedded in discrete structures is expected to display complex vibrational characteristics. This project will investigate the characteristics of the waves with the aim of mitigating the vibrational effect. This study will lead to better understanding of how the ABH effect can be implemented on engineering structures with spatially regular construction such as building framework, multi-layered composites, multi-blade turbines, and metamaterials. The research will focus primarily on theoretical studies and numerical simulation analyses.

Prospective PhD candidates:  

Candidates interested in studying for a PhD and hold at least a 2:1 (or 60%) honours degree in Engineering are encouraged to send their CV to 

Dr Karim Ashari
C0302, Blok C Eko Galleria,
Jalan Eko Botani 3,
Taman Eko Botani, 79200
Iskandar Puteri, Johor


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