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SCT907,  phgcma@hkbu.edu.hk, ext. 7095

 

Testing of Wave Propagation in Rotating Media (6 units) - Accepted Student ID: 19217838

Rotation of media, such as air of water, can break time-reversal symmetry and reciprocity, thereby leading to asymmetric transmission. This can be foundation of many interesting physics that can be observed in macroscopic systems. In the project, the student will study the physics of wave propagation in such media. We will design and fabricate a small unit containing rotating fluid and characterize the wave propagation through this unit. The student is expected to have good command with Newtonian mechanics and familiar with theory of waves. There are some interesting ideas that we may borrow from: https://www.youtube.com/watch?v=au4hbUm4mMo&feature=emb_logo

 

Design of low frequency vibration shield for electric automobiles (3/6 units)

Although electric automobile is generally quieter than those relying on gasoline, the vibration of electrical motor causes several very specific pitches that negatively affect the comfort in such vehicles. Mechanical metamaterials can display bandgaps for elastic vibrations, which may be useful for vibration isolation in electric automobiles. In this project, we will study the principle of elastic vibration and explore the tunability of mechanical metamaterials and seek to design a potentially useful unit. The student is expected to have good command with Newtonian mechanics and familiar with the concept of resonance.