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Research on Structural Reliability Analysis for Darrieus-type Vertical Axis Wind Turbine

Author: SuLiang
Tutor: TongShuiGuang
School: Zhejiang University
Course: Chemical Process Equipment
Keywords: Vertical axis wind turbine The structure of the wind wheel Finite Element Analysis Structural properties Reliability
CLC: TM315
Type: Master's thesis
Year: 2010
Downloads: 346
Quote: 3
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Abstract


Wind energy is a clean renewable energy, wind power is an important means to ease the energy shortage and environmental pressures. In wind turbine design technically, China is still at a low level, especially for vertical axis wind turbine, due to the lack of adequate engineering practice to draw on, there is no mature specification available, the The design is still stuck in the traditional structure. In this paper, the theoretical knowledge of aerodynamics, structural mechanics, focus on Dali E-type vertical axis wind turbine structure design method, and CAD / CAE technology successfully used to prototype design stage, effectively shortening the design cycle. Dali E-type vertical axis wind turbine wind wheel structure is highly flexible complex nonlinear structural systems, structural reliability is an important performance indicators of the unit. The work carried out in this paper are as follows: vertical axis wind turbine structural design methods to explore, which focuses on the calculation of wind turbine structural design process, layout program, and the blade profile; using CAD / CAE technology focuses on the dynamic characteristics of the wind wheel, static the characteristics, fatigue characteristics, stability, etc. reliability index. The dynamic characteristics of the wind turbine structure under random wind loads and periodic aerodynamic loads with reliable dynamic characteristics, focusing on analysis of damped free vibration characteristics of structures under impact loading excitation system, the system under the random wind loads wind-induced vibration response characteristics as well as the nonlinear vibration characteristics of the system. The static characteristics indicate that the wind turbine has a good structural strength in all conditions, especially the use of the wind turbine blades structure Troposkien line, the level of internal stress in leaves always remain stable and not affected by the influence of the centrifugal force during operation , nor due to stress concentration can cause fatigue damage. Wind wheel structure of the static and dynamic characteristics of the basis of the study, the completion of the the components detailed design of the wind wheel structure, fatigue analysis and structural stability analysis. The research results of the analysis showed that the structure can meet national standards require life does not occur during the failure, the structure having a high reliability. This paper presents research work on the structural design, strength analysis and reliability analysis of vertical axis wind turbine wind wheel, ideas and methods with greater versatility and value of engineering practice.

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CLC: > Industrial Technology > Electrotechnical > Motor > Generators, large the generator group ( Zonglun,) > Wind turbines
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