کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10226319 1701260 2018 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Output-only modal analysis of wind turbine tower based on vibration response under emergency stop
ترجمه فارسی عنوان
تجزیه و تحلیل منحصربفرد خروجی برج توربین بادی بر اساس پاسخ ارتعاش تحت توقف اضطراری
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
چکیده انگلیسی
The identification technique of output-only modal parameters is proposed for the large wind turbine tower under emergency stop. Compared with the response of regular operating conditions, the immediate tower structural response under emergency stop much more resembles a state of free vibration, which is more appropriate for the modal identification of the wind turbine tower. The vibration response is measured in the nacelle, which is easy to perform in the field modal test. The variational mode decomposition (VMD) is applied to decompose the vibration response into several band-limited intrinsic mode functions. The free responses of decomposed functions are extracted by applying the random decrement technique (RDT). Finally, the modal damping ratio and natural frequency are identified from each free modal response by using the Hilbert transform method. Simulations and a 1.5 MW wind turbine field modal test results verify the effectiveness of the proposed identification method. The main modal parameters of wind turbine, including weak modes, are effectively extracted by using output-only vibration responses under emergency stop. The modal parameter identification method is provided for the large wind turbine structure under the engineering condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: ISA Transactions - Volume 80, September 2018, Pages 411-426
نویسندگان
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