Dissertation > Excellent graduate degree dissertation topics show

Load Calculation and Strength Analysis Hub of3MW Wind Turbine

Author: LiuTong
Tutor: DuanZhenYun
School: Shenyang University of Technology
Course: Mechanical Design and Theory
Keywords: load calculation of wind turbine load sensitivity analysis extreme loadextrapolation modeling conditions
CLC: TM315
Type: Master's thesis
Year: 2013
Downloads: 70
Quote: 0
Read: Download Dissertation

Abstract


In the background of China’s rapid development of wind power technology, windturbine load calculations and strength analysis are directly related to the safety of itsoperation. This paper focuses on the extreme load and fatigue load of3MW wind turbinehub strength on the basis of the extreme load, and provide an effective strength calculationmethod for the design of the hub. Therefore, this study has practical value and academicsignificance analysis of wind turbine.According to the IEC standard3MW wind turbine parametric modeling, normal loadconditions and extreme load cases were based on research and simulation study. Severalimpact of wind turbine load factors were only the tower shadow, wind shear, wake withthree effects are compared. Sensitivity for blade stiffness of the wind turbine changesunder load, flexible multi-body dynamic equations fully coupled wind turbine modeling,and consider generated when the blade rotates aerodynamics, gravity, centrifugal force.Dynamic response characteristics of the analysis blade, mainly consider the aerodynamicdamping of the blade effect. The use of Newmark method for dynamic analysis of windturbine blades calculation, and the dynamic response of the total. Calculate the sensitivityof the load of the blades in different stiffness.During the analysis of the extreme load and fatigue load analysis of extreme load,fatigue load changes due to blade installation angle installation errors obtained fatigue loadis much larger than the increase in the degree of extreme load. In addition, Base on theresearch edgewise and flapwise blade root bending moment extreme load extrapolationmethod of wind turbines, the introduction of the peak over threshold method. Use the twomethods respectively for two typical probability distributions for analysis and comparison.Research shows that the most suitable in the calculation of the extreme load extrapolationmethod is three parameters Weibull distribution of maximum likelihood estimation method,and more extensive relative to the other three methods.Finally, on the hub of the FEM in the case of the extreme load, the blades and hub connection at the stress maximum and verify a3MW wind turbine of the hub and othereffects of force is lower than the hub material’s yield strength, and prove that the structureof the design is full strength requirements.

Related Dissertations

  1. Research of Sustained Tracking Targets During Immobile and Moving Status Methods Based on Multiple Statistical Methods,TP391.41
  2. Experimental Investigation of Complex Eddy Viscosity Modeling in Turbulent Boundary Layer with Periodic Blow/Suction Disturbance,O357.5
  3. The Study of Double-Fed Variable Speed Wind Power Control System,TM315
  4. Research on Individual Pitch Control for Wind Turbines,TM315
  5. Asynchronous off-grid wind power system control technology research,TM315
  6. Research of Direct Torque Control Strategy Applied to Doubly Fed Induction Generator in Wind Power Generating System,TM315
  7. Research on Efficiency Enhancement of Vertical Axis Wind Turbine with Wind Flow Recitifier,TM315
  8. Research of the Control of Wind Turbine Tower Side to Side Vibration and the HSMC in the DFIG,TM315
  9. Small vertical axis wind turbine wind turbine design optimization,TM315
  10. Design of Back to Back PWM Converters for Double-fed Wind Power System,TM315
  11. The Research of the Control Technology of the VSCF Wind Turbine Generator System,TM315
  12. Research on Direct Drive Volume Control Pitch-Angle System of Wind Turbine,TM315
  13. Research on Related Issues for the Safe Operation of Permanent Magnet Synchronous Wind Generator,TM315
  14. Research on Control of Doubly Fed Wind Power System in Case of Speed Sensor Failure,TM315
  15. The Research of Passive Automatic Maximum Wind Energy Tracking Wind Power Generation System,TM315
  16. The Research on Doubley-fed Wind Turbine Control System and Converter,TM315
  17. Study of Wind Wheel Simulation System of Wind Power Generation,TM315
  18. Research on Working Reliability of 5KW Off-grid Small Wind Driven Generator,TM315
  19. Study and Simulation Analysis of the Drive Train Dynamics of Direct-Drive Wind Turbine,TM315
  20. Dynamic and Fatigue Analysis of the Whole Truss Support Structure of Offshore Wind Turbine,TM315
  21. Individual Pitch Control Design and Simulation of Mega-Watt Wind Turbine,TM315

CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,) > Wind turbines
© 2012 www.DissertationTopic.Net  Mobile