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SUMMARY:3D Fluid-Structure Interaction and Fatigue Damage Simulation of Wi
 nd Turbine Structures
DTSTART:20160210T090000
DTEND:20160210T100000
DTSTAMP:20260407T045503Z
UID:2553f65f93bc306ef1e8fcefc31b192d1131dffc84a9d8953031208e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Xiaowei Deng\, Department of Structural Engineering\, Univ
 ersity of California\, San Diego\nWind energy\, as an alternative to fossi
 l fuels\, is plentiful\, renewable\, widely distributed\, clean\, produces
  no greenhouse gas emissions during operation. Wind turbines\, converting 
 mechanical energy to electricity\, must extract as much wind energy from a
 ir flow as possible while resisting huge forces and deformations over a li
 fespan of 20 years. The size of wind turbine has been steadily increasing 
 over the past few years with the limit of blade length expanding from 30 m
 eters to 80 meters. Therefore the design challenge of large wind turbines 
 is to balance aerodynamic performance and structural integrity. The primar
 y goal of this project is to develop a high-fidelity simulation techniques
  that are capable of modeling the interaction of full scale wind turbine s
 tructures with air flow and ocean water and capture the fatigue behaviors 
 of the large wind turbine blade under millions of loading cycles over the 
 long life span.\nFull-scale wind turbine structure is modeled with Kirchho
 ff-Love shell and rotaion-free beam using isogeometric analysis. Residual 
 based variational multiscale simulations (RBVMS) combined with the techniq
 ues of enforcement of weak boundary conditions and track of non-matching m
 eshes have been applied to the problem of wind and turbine interaction for
  high Reynolds number aerodynamics. With the assistance of level set metho
 d\, the free-surface flow is modeled by two-phase Navier-Stokes equations\
 , which enables the simulations of the interaction between the free-surfac
 e ocean waves and floating wind turbines. A framework of fatigue damage mo
 del based on continuum damage mechanics and residual stiffness approach an
 d driven by the dynamic data application system (DDDAS) was established\, 
 aiming at simulating high-cycle fatigue of wind turbine composite blades. 
 The final results indicate accurate prediction of the damage zone formatio
 n\, damage progression\, and eventual failure of the composite turbine bla
 de.\nBio: Xiaowei Deng is a Postdoc in the Department of Structural Engine
 ering\, University of California\, San Diego. He is currently working on f
 luid-structure interaction (FSI) analysis and fatigue damage modeling of c
 omposite structures. He held a M.S. in Civil Engineering from Tsinghua Uni
 versity. He started the Pd.D. program from University of Cambridge and the
 n transferred to California Institute of Technology to complete the Ph.D. 
 in Aerospace Engineering. During the Ph.D. studies\, he mainly worked on d
 eployable lightweight structures with a focus of a NASA project\, deployme
 nt of super-pressure balloons up to 128-m diameter. He received the Willia
 m F. Ballhaus Prize for outstanding PhD dissertation\, and two best paper 
 awards from ASME and AIAA respectively.
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STATUS:CONFIRMED
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