Engineering Advanced Marine Systems: Challenges Imposed by Emergent Structural Behavior

Friday, February 2, 2018 - 2:30pm
3110 Etcheverry Hall
Jelena Vidic-Perunovic, Ph.D.

Doris Inc.

Houston, TX


E-201 Ocean Engineering Seminar Series, Spring 2018


2:00 - 2:30pm Beverages & Refreshments

2:30 - 4:00pm Seminar


Complexity of marine structures is ever increasing because of requirements on efficiency of ship operation and energy-production capability of offshore systems. During operation, marine systems are impacted by uncertainties caused by e.g., structural innovation, underexplored environment, or complicated regulation. Such impositions may lead to system responses that are difficult for engineers to predict and analyze in the design phase, which may later on result in structural failure.  The presentation is based on previously accomplished, or still undergoing studies, while the author was at the Technical University of Denmark, and later when working in industry as a Principal Investigator on DOE research projects on energy-production systems. The results were also published in several journal articles over the last five years. The presentation material is organized into cases that deal with complex dynamics of marine structures and resonant response in stochastic seaway or current conditions. Examples of ship responses include non-linear springing in hull girder induced by bi-directional sea states and parametric roll resonance in fine-form ships. Furthermore, some aspects are presented on conceptual design of a novel round-hull production system for ultra-deep water and in hurricane conditions. Results from preliminary model tests conducted at Texas A&M of a round-hull global motion in combined sea states are shown.  Finally, suggestions are given on how to minimize the system emergent properties by dealing with undesirable behavior of marine structures early in development phases.


Jelena Vidic-Perunovic is a senior analyst in naval architecture and riser mechanics at Doris Inc., Houston. She holds a Ph.D. degree in maritime engineering from the Technical University of Denmark, Copenhagen. She has research, teaching, and consultancy experience in: Loads and Global Structural Responses, Stochastic Waves Excitation, Seakeeping and Stability, Hydrodynamics, Complex System Design, Maritime and Offshore regulations. Her professional interests include advanced engineering analysis and research in maritime and offshore industry, ship hulls, floating-platform and risers design, wave-basin model tests, complex designs of large engineering systems and optimization methods, using analytical and integrated approaches to problem solving. Before joining Doris Inc., Vidic-Perunovic worked at the Technical University of Denmark, National Oilwell Varco, CA, and the American Bureau of Shipping.


Hosted by: Prof. Reza Alam, 6111 Etcheverry Hall (