R. Parker Eason
R. Parker Eason, Ph.D., P.E.
Senior Engineer
Mechanical Engineering
  • Houston

Dr. Parker Eason is a Senior Engineer in Exponent’s Mechanical Engineering practice.  Dr. Eason has a specialized background in the areas of vibrations and solid mechanics, field experience in oil and gas drilling and manufacturing, and extensive programming expertise in Matlab and Fortran.  Dr. Eason’s project experience includes analysis of fluid-elastic instability and turbulent buffeting in a nuclear steam generator tube bundle, rotor vibration diagnostics of steam turbine generators and vertical pumps, root cause failure analysis of a rapidly-oscillating consumer electronics component, feasibility studies for water hammer and accelerated lifetime tests, investigation of excessive noise and vibrations of a commercial plug valve, and analysis of vibration and noise transmission through building structures housing material handling equipment.

Dr. Eason’s oil and gas experience includes analysis of directional drilling data related to an alleged well collision, stress analysis of a failed blowout preventer (BOP) component which had resulted in a fire and explosion, and supporting the development of oil and gas drilling and safety equipment.  Prior to his graduate studies, Dr. Eason worked as a Measuring and Logging While Drilling (MWD/LWD) Field Engineer on both land and offshore drilling rigs.  He was responsible for monitoring and interpreting real-time directional drilling data from surface and downhole equipment.  Dr. Eason was also a founding member of FracEnsure, a start-up company specializing in uniquely identifiable nano-particles used for long-term, long-distance tracking of hydraulic fracture fluids.    

Within his doctoral research, Dr. Eason used numerical, experimental, and analytical methods to identify the complex non-linear interactions in a structural vibration absorber.  He also developed a computational method used to increase the efficiency of analyzing the global dynamic behavior of mechanical systems.  Dr. Eason’s Master’s degree research identified and quantified measurement errors resulting from the presence of higher harmonics in the response of an atomic force microscope probe.

In his work at an advanced prototyping facility, Dr. Eason executed all stages of prototype design from initial concept to finished product.  He is proficient in computer aided design (CAD) and has hands-on experience in manual and computer-controlled (CNC) precision manufacturing including milling, turning, and plasma cutting. 

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Mechanical Engineering, Rice University, 2013
  • M.S., Mechanical Engineering, Rice University, 2011
  • B.S., Mechanical Engineering, University of Maine, 2008, magna cum laude
  • Departmental Fellowship, Rice University, 2009–2013

    National Science Foundation Fellow, 2011

    Loewenstern Scholarship in Engineering, Rice University, 2010

    Presidential Distinguished Scholarship, University of Maine, 2007

    Tau Beta Pi: Engineering Honor Fraternity, Inducted 2007

    Pi Tau Sigma: Mechanical Engineering Honor Fraternity, Inducted 2007

LICENSES & CERTIFICATIONS

Licensed Professional Engineer, Texas, #118757

Certified Vibration Analyst (Category II), Mobius Institute

Publications

Eason RP, Sun C, Dick AJ, Nagarajaiah S.  Steady-state response attenuation of a linear oscillator-nonlinear absorber system by using an adjustable-length pendulum in series: Numerical and experimental results.  Journal of Sound and Vibration, 2015; 344(1): 332-344.

Eason RP, Dick AJ.  A parallelized multi-degrees-of-freedom cell mapping method.  Nonlinear Dynamics, 2014; 77(3): 467-479.

Eason RP, Dick AJ, Nagarajaiah, S.  Numerical investigation of coexisting high and low amplitude responses and safe basin erosion for a coupled linear oscillator and nonlinear absorber system. Journal of Sound and Vibration, 2014;

Eason RP. High amplitude response behavior of a linear oscillator-nonlinear absorber system: Identification, analysis, and attenuation by using a semi-active absorber in series. PhD Thesis, Department of Mechanical Engineering and Materials Science, Rice University, April 2013.

Eason RP, Sun C, Dick AJ, Nagarajaiah S. Attenuation of a linear oscillator using a nonlinear and a semi-active tuned mass damper in series. Journal of Sound and Vibration, 2013; 332(1): 154-166.

Sun C, Eason RP, Nagarajaiah S, Dick AJ. Hardening Duffing oscillator attenuation using a nonlinear TMD, a semi-active TMD and multiple TMD. Journal of Sound and Vibration, 2013; 332(4): 674-686.

Eason RP, Sun C, Dick AJ, Nagarajaiah S. Using a semi-active tuned mass damper to limit the motion of a nonlinear absorber and attenuate structural vibrations. Proceedings of the ASME International Mechanical Engineering Congress & Exposition, 2012.

Eason RP. Optical lever measurement accuracy for off-resonance excitation in atomic force microscopy. Master’s Thesis, Department of Mechanical Engineering and Materials Science, Rice University, April 2011.

Eason RP, Dick AJ. Response measurement accuracy for off-resonance excitation in atomic force microscopy. Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME, 2012; 134(1): 011010 (9 pages).

Dick AJ, Eason RP. Response measurement accuracy for off-resonance excitation in atomic force microscopy. Proceedings of the ASME International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, 2010.

Presentations

Eason RP, Sun C, Dick AJ, Nagarajaiah S. Using a semi-active tuned mass damper to limit the motion of a nonlinear absorber and attenuate structural vibrations. Presented at the ASME International Mechanical Engineering Congress & Exposition, 2012.

Eason RP et al. Initial mechanical stability of cementless porous titanium patellar components. Presented at the 26th Conference and Exposition on Structural Dynamics, 2008.

Prior Experience

Research & Teaching Assistant, Nonlinear Phenomena Laboratory, Rice University, 2009–2013

Field Operations Manager & Founding Member, FracEnsure, 2011–2013

Business Consultant, Advanced Quantum Wire, Fall 2012

Technical Consultant, Atelier Domingue, 2011–2012

LWD Field Engineer, Weatherford International, 2008–2009

Student Engineering Assistant, Advanced Manufacturing Center, 2005–2008

Engineering and Research Intern, Los Alamos National Laboratory, Summer 2007

Engineering Intern, NASA, Summer 2006

Professional Affiliations

American Society of Mechanical Engineers—ASME (Member)

Claims and Litigation Management – CLM (Fellow)

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Mechanical Engineering, Rice University, 2013
  • M.S., Mechanical Engineering, Rice University, 2011
  • B.S., Mechanical Engineering, University of Maine, 2008, magna cum laude
  • Departmental Fellowship, Rice University, 2009–2013

    National Science Foundation Fellow, 2011

    Loewenstern Scholarship in Engineering, Rice University, 2010

    Presidential Distinguished Scholarship, University of Maine, 2007

    Tau Beta Pi: Engineering Honor Fraternity, Inducted 2007

    Pi Tau Sigma: Mechanical Engineering Honor Fraternity, Inducted 2007

LICENSES & CERTIFICATIONS

Licensed Professional Engineer, Texas, #118757

Certified Vibration Analyst (Category II), Mobius Institute