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Otto Nielsens veg 10, Marinteknisk senter * F2.145

Background and activities

BASIC INFORMATION

Currently, I am a DNV-GL sponsored professor on marine structures at the Department of Marine Technology and Centre for Autonomous Marine Operations and Systems (AMOS), Norwegian University of Science and Technology (NTNU).

I obtained my bachelor and MSc degrees in naval architecture and ocean engineering from Shanghai Jiao Tong University (SJTU) in 2000 and 2003, respectively. My MSc study mainly focused on numerical simulations of ship-ship and ship-bridge collisions. The thesis title is "Numerical Simulation of Ship Collision and Study on Crashworthiness of FPSO's Side Structures". My supervisor was Professor Yongning Gu.

In August 2003, I came to NTNU to do my PhD study on marine technology. On February 6, 2008, I successfully defended my PhD thesis with the title "Stochastic Response Analysis of Mooring Systems with Emphasis on Frequency-domain Analysis of Fatigue due to Wide-band Response Processes". My PhD supervisor was Professor Torgeir Moan.

From 2008 to 2015, I worked as a post-doc, reseacher and then adjunct associate professor in the Offshore Wind Energy Group led by Prof. Torgeir Moan, before I became a full professor in July 2015.

RESEARCH FIELDS AND INTERESTS

Offshore Renewable Energy: numerical and experimental study of offshore wind turbines (both bottom-fixed and floating), wave energy converters (oscillating bodies and overtopping devices) and combined concepts; numerical methods for coupled global dynamic response analysis of offshore wind turbines; hierarchical methods for local response analysis of wind turbine drivetrains; design and analysis of floating structures to support large-scale (5 MW and 10 MW) wind turbines; modeling and analysis of offshore wind turbines with geared drivetrain, direct drive and hydraulic transmission; mooring system design and analysis for offshore renewable energy platforms.

Marine Operation: operational and safety criteria for marine operations related to offshore wind turbine transport, installation and access for maintenance and repair; numerical modeling and time-domain simulation of marine operations involving transient dynamics and nonstationary system responses (such as crane operations for monopile or jacket foundation installation).

Structural Mechanics and Dynamics: dynamic analysis of offshore structures using finite element methods; coupled mooring analysis; fatigue assessment of offshore structures; numerical simulation of ship collision and grounding.

Stochastic Analysis: frequency-domain cycle counting method for fatigue analysis of wide-band processes; extreme value prediction and fatigue analysis of non-Gaussian processes; contour line method; stochastic modeling of random waves; short-term and long-term statistics of wind and wave conditions.

Reliability and Risk Analysis: uncertainty modeling and structural reliability assessment of offshore oil and gas platforms as well as renewable energy platforms; fatigue reliability methods applied to mechanical components (such as gearbox in wind turbines); fatigue reliability analysis of offshore wind turbine jacket foundations for inspection and maintenance planning; overload and fatigue reliability of mooring system; risk analysis of station-keeping system.

Scientific, academic and artistic work

Displaying a selection of activities. See all publications in the database

Journal publications

Report/dissertation

  • Gao, Zhen. (2008) Stochastic Response Analysis of Mooring Systems with Emphasis on Frequency-domain Analysis of Fatigue due to Wide-band Response Processes. 2008. ISBN 9788247159835. Doktoravhandlinger ved NTNU (2008:11).