Academic Projects

A finite element approach to simulate surface response of a cylinder due to a subsurface acoustic source

Problem Statement

Using finite element analysis on ANSYS and ABAQUS to simulate surface oscillation of a cylinder due to an internal oscillating sphere. Compare the results from simulation on ABAQUS with analytical solution and simulation on ANSYS to validate our result.


Outcome

  • Compression, shear and surface wave response are formulated using numerical finite element method.

  • At low audible frequencies compression and shear wave propagation from point source can both be significant with shear wave are less significant as frequency increases


Energy Audit and HVAC Design of a Small Sized Office Space

Problem Statement

  • Simple office space design in Revit.

  • Calculate the highest load cooling/heating and design based on the highest load

  • Find out volume flowrate

  • Design the duct system



Outcome

  • Calculate the total heating and cooling load

  • Generate duct pressure loss report for every section of the duct

  • Optimize duct sizing to minimize duct and fitting pressure loss

  • Recommend fan type and power of the AHU.


Early screening of DDH using ensemble-based machine learning

Problem Statement

  • Treatment of Developmental Dysplasia of Hip (DDH) becomes less convoluted if it is detected early

  • At low audible frequencies compression and shear wave propagation from point source can both be significant with shear wave are less significant as frequency increases




Outcome

  • We developed a model to classify the dislocation of the thigh bone from the hip socket.

  • Acoustic parameters, in conjunction with a linear SVM techniques to achieve an overall accuracy of 79%.



Experimental investigation on photo strictive materials for MEMS application

Problem Statement

Transverse deflection of the PLZT optical actuator depends on the light intensity. The deflection of the PLZT optical actuator will vary for the continuous and pulses of lights. Fast response and significant deflection of the PLZT optical actuator under the illumination of light could be used in MEMS applications as a wireless control.





Outcome

  • Continuous and pulses of lights deflects PLZT optical actuator.

  • Transverse deflection of cantilever beam increases with the increase of light intensity.

  • Locations and boundary conditions influence on the transverse deflection magnitude of cantilever.




Analysis of Effects of Surface Roughness on Muffler Performance

Problem Statement

  • Effect of surface roughness in muffler performance

  • Design and modelling of an exhaust muffler with different surfaces

  • Measure the sound attenuation for different input frequency.

  • Compare experimental sound attenuation and simulation result using COMSOL.





Outcome

  • Surface roughness improves sound attenuation in some particular range of frequency.

  • From 900Hz to 1200 Hz, sound attenuation is greater for rough surface than for smooth surface.