Dynamics of flexible tower-blade and rigid nacelle system: dynamic instability due to their interactions in wind turbine

被引：10
|
作者：
Kang, Namcheol [1 ]
Park, Sung Chul [2 ]
Park, Junhong [3 ]
Atluri, Satya N. [4 ]
机构：
[1] Kyungpook Natl Univ, Sch Mech Engn, 1370 Sankyuk Dong, Daegu, South Korea
[2] Korea Powertrain Co Ltd, R&D Ctr, Daegu, South Korea
[3] Hanyang Univ, Sch Mech Engn, Seoul 133791, South Korea
[4] Univ Calif Irvine, Dept Mech & Aerosp Engn, Irvine, CA 92717 USA
来源：
JOURNAL OF VIBRATION AND CONTROL | 2016年 / 22卷 / 03期
基金：
新加坡国家研究基金会;
关键词：
Coupled tower-blade system; eigenvalue veering; mode coalescence; stability; wind turbine system; VIBRATION ANALYSIS; TIP MASS; BEAM;
D O I：
10.1177/1077546314532119
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
The dynamic stability of a coupled tower-blade wind turbine system is investigated analytically and experimentally. Coupled equations of motion and associated boundary conditions for the wind tower and a rotating blade are derived by considering the lateral acceleration of the nacelle at the tip of the tower, which is the base of the flexible blade. The coupled eigenvalues are computed for various blade rotational speeds and densities of the tower material by using Galerkin's method in spatial coordinates. The results indicate that the coupled tower-blade system becomes unstable when certain vibrational modes of the tower and blade coalesce. Additionally, the vibration of the rotating blades is measured using a wireless telemetry system attached to the small-scale tower-blade wind power system, and the results are compared with those of the analytical study. The experiment shows that instability is observed in the same ranges of the blade rotational speed as those predicted by our analytical study.
引用
收藏
页码：826 / 836
页数：11
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