Stress Analysis of a ۲.۵ MW Wind Turbine Main Frame - A Finite Element Study
Publish place: 30th Annual International Conference of the Iranian Association of Mechanical Engineers
Publish Year: 1401
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISME30_313
تاریخ نمایه سازی: 29 خرداد 1401
Abstract:
Main frame is one of the wind turbine nacelle parts, which includes critical rotating parts like the main shaft and gearbox. Main frame experiences considerable loads due to gravity and operating conditions, which are explained as ۱۴ load cases. Force and moment components of load cases are presented in fixed main bearing coordinate. Steel S۲۳۵J۲ and S۳۵۵J۲ are used in the main frame. The main purpose of the present study is stress analysis of a ۲.۵ MW wind turbine. This analysis has been performed utilizing the finite element method in the Ansys workbench. Average and elemental mean stress are utilized to explain the maximum stress in load cases. These stress are modified in singular points using the Hobbacher method. The safety factor of each load case is calculated considering the maximum stress of the model after modification. Stress analysis results show the highest stress in the main frame is ۱۴۱ MPa which leads to the safety factor ۱.۴۴. Design of the wind turbine main frame can be improved by considering the stress analysis result.
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Authors
Mohsen Maleki
Stationary Equipment Design Specialist, R&D Department, MAPNA Generator Engineering and Manufacturing Co.(PARS), Karaj;
Mohsen Nikfar
Head of Stationary Equipment Design, R&D Department, MAPNA Generator Engineering and Manufacturing Co.(PARS), Karaj;