Journal
RENEWABLE ENERGY
Volume 179, Issue -, Pages 842-858Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2021.07.055
Keywords
Monopile supported wind turbines (MWTs); Joint wind and operating loads (JWOLs); Long-term performance; Wind tunnel tests; Dynamic responses
Funding
- National Natural Science Foundation of China [51978225, 51978221]
- Shenzhen Strategic Emerging Industry Development Programme [XMHT20200103001]
- Shenzhen Natural Science Fund [GXWD20201230155427003-20200727153423001]
Ask authors/readers for more resources
This paper presents an experimental study on the effects of joint wind and operating loads on the long-term performance of monopole-supported wind turbines, finding that the effects on MWTs vary under different conditions.
This paper presents an experimental study on the effects of joint wind and operating loads (JWOLs) on the long-term performance of monopole-supported wind turbines (MWTs) standing on soils. In this paper, a novel loading method that can apply ambient excitation without constraints and generate random fluctuating loads around a non-zero mean is proposed to simulate JWOLs. The method was realized using a wind tunnel. A series of wind tunnel tests with different JWOLs were designed and performed on a 1:100 MWT model of the NREL 5 MW wind turbine. The effects of the average load in the fore-to-aft (F-A) direction and the fluctuating loads in the F-A and side-to-side (S-S) directions on the long-term performance of MWTs (including the variations in the natural frequency, damping ratio, and the accumulated deformation) were studied. The test results show that the variation in the natural frequency is marginal (within-2.1% to 3.6%), whereas that in the damping ratio is within-63.9% to 38.4%. The accumulated deformation curve under different conditions can be represented using a power function. The long-term performance problems (the frequency shift and the accumulated deformation) of MWTs observed under simple harmonic loads may be high to an extent compared with those observed under certain JWOLs. (c) 2021 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available