Research Interests

• Linear and Nonlinear Dynamics of Mechanical Devices/Components:

  · Chatter vibrations in high speed and precision machining;
  · Vehicle dynamics and kinematics, vehicle structural vibrations; 
  · Liquid sloshing in moving containers;
  · Chaotic, quasiperiodic and periodic behavior of nonlinear vibration systems;
  · Linear and nonlinear vibrations of mechanical devices.

• Enhanced Oil Recovery (EOR) with Seismic Wave and Vibration Stimulation:

  · Wave propagation in porous media;
  · Energy conservative vibration stimulation with multiple energy sources; 
  · Multiphase fluid mobilization in porous media with experimental and numerical approaches;
  · Wave motion in half-space porous media;
  · Theoretical and experimental approaches of the response of strata saturated with water and oil to elastic waves;
  · Oil field appication of EOR with seismic wave and vibration stimulation technique.

• Acoustic Engineering:

  · Noise assessment and noise control for all terrain vehicles;
  · Speech privacy in enclosure, sound propagation in large-scale power plant, industrial noise control and acoustic materials design;
  · Traffic noise mapping and traffic noise evaluation;
  · Trafficnoise control with porous pavements.

• Fatique Analysis:

  · Fatigue strength assessment of vehicle structures subjected to nonlinear dynamical loading due to road conditions, operation maneuvers and sloshing of liquid cargos.
  · Finite element fatigue analysis for steel ASME pressure vessels and tank vehicle structures exerted by cyclic operating pressures.

• CAD in Mechanical Design:

  · Stress/strain/deformation analysis for engineering structures with large deformation and thermal effects;
  · Numerical modeling of motions and dynamical responses of mechanical devices subject to linear and nonlinear loadings;
  · Fracture assessment (stress-strain-deformation states at crack tip) of mechanical components under triaxial loading.

• Constitutive Relation:

  · Geometrically and physically nonlinear wave propagation in thermoelastic media including a novel constitutive theory.

• Design and Manufacturing Optimization:

  · Optimization of mechanical design and manufacturing with nonlinearities and uncertainties.

• Computer simulation (Vehicles and Machinery), novel numerical method:
• · Numerical simulation of liquid slosh in moving containers of various shapes;
  · Effective and accurate numerical methods through a technique of “piecewise constantization” in simulating linear and nonlinear vibrations, chaotic behavior and dynamical responses of vehicles and machineries;
  · P-T method developed generates more accurate and faster convergent result in comparing with Runge-Kutta method.