Faculty Profile


Adrian S. Onas

Associate Professor of Naval Architecture 

Ph.D., Ocean Engineering (Naval Architecture and Hydrodynamics), Stevens Institute of Technology, 2009

Thesis: “Nonlinear Roll Motions of a Frigate-type Trimaran and Susceptibility to Parametric Roll Resonance”

M.Sc., Naval Architecture and Marine Engineering, University of New Orleans, 1998

B.Sc., Naval Engineering, Constanta Merchant Marine Institute, 1993

Appointments at Webb Institute:
Associate Professor of Naval Architecture, 2013 - Present
Assistant Professor of Naval Architecture, 2011 - 2013 
Director, Circulating Water Channel/PIV System, 2012 - Present 

Other Academic Experience:
Adjunct Professor, Stevens Institute of Technology, 2009 - Present

Non-academic Experience:

Hydrodynamics Specialist, Research on nonlinear roll damping, validation work on potential flow code, Navatek Ltd., 2014

Principal Investigator, Atlantic Center for Innovative Ship Design and Control of Small Ships, Performed hydrodynamic analysis using potential flow code on multihull vessels, Webb Institute, 2011 - 2014

Naval Architect/Tonnage Coordinator, Performed tonnage calculations on ocean going vessels, consulting/verification work with nonlinear potential flow code HydroD/WASIM and FEA program Sesam/GeniE, DNV GL, 2013 - 2014

FEA structural analysis, 2013 - 2014

Naval Architect/Tonnage Coordinator, Performed tonnage calculations on ocean going vessels, verification of nonlinear potential flow hydrodynamic analysis and FEA structural analysis, Det Norske Veritas, 2011 - 2013

Naval Architect/Plan Approval, Conducted newbuilding class surveys on ocean-going car carriers and high speed ferries, performed tonnage calculations on ocean going vessels, design assessment and class surveys of diesel engines and control and monitoring systems, verification of nonlinear potential flow hydrodynamic analysis and FEA structural analysis code, Det Norske Veritas, 1999 - 2011

Research Assistant, Performed research on hydrofoil catamaran hydrodynamics and structural analysis using FEA, University of New Orleans, 1997 - 1998 

Deck Officer/Naval Engineer, Operation and class surveys of ocean-going vessels, supervise dry docking operations, Klaveness Group/Kassos/Petromin S.A., 1993 - 1997

Work Experience:

Seventeen years of experience in the Maritime Industry in Europe and the United States including four years at sea. Over twelve years of work with ships and mobile offshore units classification plan approval, certification of materials, components and systems, newbuilding surveys including sea trials, shipyard and marine product quality assessments.

Carried-out, verified and coordinated the execution of tonnage calculations and confirmatory surveys for newbuildings, conversions and operating ships and mobile offshore units under U.S. Flag and foreign Flag. Single point of contact (POC) for DNV in North America to USCG, Marine Safety Center (MSC-4) for tonnage admeasurement under USCG Alternate Compliance Program (ACP).

Research experience in the high-speed towing tank at Davidson Laboratory, Stevens Institute of Technology with monohull and multihull models. Research work included calm water resistance, roll damping, forced roll and dynamic stability.

Research experience with nonlinear ship motion program WASIM, including time-domain simulations of roll decay, forced roll and parametric roll resonance in regular seas; frequency-domain simulation experience, including the study of trimaran roll response in beam/oblique seas and the resonant wave trapping modes in forced roll and forced heave oscillations. Investigated two nonlinear roll damping models using forced roll tests with a specially designed forced roll apparatus.

Current research is focused on tank wall effects on trimaran roll added mass and radiation damping and validation of forced roll oscillation simulations in WASIM. Numerical towing tank implementation in WASIM is validated by experimental investigation of the hydrodynamic coefficients of a monohull and trimaran in restricted channels at forward speed.

Involved in logistics, work verification and reporting of results related to towing tank and ocean basin tests on a flexible model of a high-speed vessel in regular and irregular seas in order to verify the analytical predictions of the hull girder structural loading, including slamming induced whipping, and confirming the operational profile.

Courses Taught, 2011 to Present:
Ship Vibrations
Naval Architecture V: Ship Dynamics
Ship Design III

As an adjunct at Stevens Institute of Technology:
OE 520 Design of Marine Structures (Ship Motions)
OE 532 Total Ship Design II (Ship Structures)

Important Publications and Presentations, 2009 to Present:

  • Onas, A.S., Datla, R. - Experimental Analysis of roll damping of a trimaran with varying side hull stagger and transverse spacing; Presented at WMTC 2009, Mumbai, India, Proceedings.
  • Onas, A.S., Datla, R. - Nonlinear Roll Motions of a Frigate-type Trimaran, 2011 FAST Conference.

Professional Development Activities:
CD-Adapco Star CCM+ treaining, 2013.LaVision PIV Training, 2012.
Attended SNAME Annual meetings.
Attended SNAME/ASNE New York Metropolitan Section meetings.
Regularly attend Annual Tonnage Conference at the USCG Marine Safety Center (MSC-4).
Attended meetings with the Atlantic Center for the Innovative Design and Control of Small Ships (ACCeSS).

Honors and Professional Recognition:
Det Norske Veritas, Ph.D. Scholarship, 2006 - 2009
Torvald Klaveness Cadet Fellowship, 1993

Professional Memberships:
Society of Naval Architects and Marine Engineers (SNAME)
American Society of Naval Engineers (ASNE)

Service Beyond Webb Institute:
PhD Committee member, Stevens Institute of Technology (2012 - 2013), Dissertation of Paredes, Ruben J., “Smoothed Particle Hydrodynamics applied to fluid structure interaction problems involving hydroelastic response”

Member of the U.S. Delegation at the IMO/SLF55 - 2013

Return to Faculty Page