scholarly journals Nonlinear Structural Control Analysis of an Offshore Wind Turbine Tower System

Processes ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 22 ◽  
Author(s):  
Y. Hamed ◽  
Ayman A. Aly ◽  
B. Saleh ◽  
Ageel F. Alogla ◽  
Awad M. Aljuaid ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Nonlinear Oscillations ◽  
Oscillation Amplitude ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Control Analysis ◽  
Control Force ◽  
Wind Turbine System ◽  
Wind Turbine Tower ◽  
Tower System

This paper investigates the vibration control, stability, and energy transfer of the offshore wind turbine tower system with control force and nonlinearity terms. A nonlinear proportional derivative (NPD) controller was connected to the system to reduce a high oscillation amplitude and to transfer the energy in the wind turbine system. Furthermore, the averaging method and Poincaré maps were used with respect to the controlled system to study the stability and bifurcation analysis in the worst resonance cases. The curves of force response and frequency response were plotted before and after the control unit was added to the wind turbine system. In addition, we discuss the performances of the control parameters on the vibration magnitudes. Numerical simulations were carried out with Maple and Matlab algorithms to confirm the analytical results. The results show the effectiveness of the NPD controller in suppressing the nonlinear oscillations of the wind turbine system.

Analysis and Design of Integrated Optimization of 1.5MW Wind Turbine Tower

2014 ◽  
Vol 971-973 ◽  
pp. 958-961
Author(s):  
Yong Zhi Xie ◽  
An Le Mu
Keyword(s):  
Mathematical Modeling ◽  
Wind Turbine ◽  
Modal Analysis ◽  
Static Analysis ◽  
Optimization Algorithm ◽  
Parametric Modeling ◽  
Analysis And Design ◽  
Wind Turbine Tower ◽  
Tower Structure ◽  
Ansys Workbench

This paper uses Isight_FD 5.6 to integrate UG8.0 parametric modeling, ANSYS Workbench static analysis, modal analysis, and mathematical modeling of design optimization, by means of optimization algorithm, to meet strength and the stiffness of the tower, to realize the optimization of tower structure, so as to attain the expected target which reduces the weight of tower.

Study on Design Parameters of Wind Turbine Tower

2013 ◽  
Vol 753-755 ◽  
pp. 1106-1109
Author(s):  
Li Jun Zhang ◽  
Ming Gang Sun
Keyword(s):  
Wind Turbine ◽  
Design Parameters ◽  
Long Term Effects ◽  
Vibration Displacement ◽  
Wind Turbine Tower ◽  
Gravity Load ◽  
Relationship Of ◽  
Tower Height ◽  
Tower System

The tower is the main supporting structure of wind turbine, is connected with the foundation and bears the long-term effects of wind load and gravity load and so on. The structural styles of wind turbine tower are analyzed. The lowest height of tower is presented and the relationship of the tower height and diameter of the wind wheel is also studied in detail in this paper. By analyzing the natural frequency and the vibration displacement of wind turbine tower system, the reasonable resonance vibration interval of tower system is also obtained.

A Circuit Model for Lightning Surge of Wind Turbine Tower with an Internal Conductor

2015 ◽  
Vol 135 (3) ◽  
pp. 200-206 ◽  
Author(s):  
Yoki Ikeda ◽  
Naoto Nagaoka ◽  
Yoshihiro Baba
Keyword(s):  
Wind Turbine ◽  
Circuit Model ◽  
Wind Turbine Tower

Seismic response analysis of steel–concrete hybrid wind turbine tower

2021 ◽  
pp. 107754632110075
Author(s):  
Junling Chen ◽  
Jinwei Li ◽  
Dawei Wang ◽  
Youquan Feng
Keyword(s):  
Wind Turbine ◽  
Response Spectrum ◽  
Ground Motions ◽  
Time History ◽  
Seismic Action ◽  
Response Spectrum Method ◽  
Spectrum Method ◽  
Wind Turbine Tower ◽  
Ground Types ◽  
Nonlinear Time History

The steel–concrete hybrid wind turbine tower is characterized by the concrete tubular segment at the lower part and the traditional steel tubular segment at the upper part. Because of the great change of mass and stiffness along the height of the tower at the connection of steel segment and concrete segment, its dynamic responses under seismic ground motions are significantly different from those of the traditional steel tubular wind turbine tower. Two detailed finite element models of a full steel tubular tower and a steel–concrete hybrid tower for 2.0 MW wind turbine built in the same wind farm are, respectively, developed by using the finite element software ABAQUS. The response spectrum method is applied to analyze the seismic action effects of these two towers under three different ground types. Three groups of ground motions corresponding to three ground types are used to analyze the dynamic response of the steel–concrete hybrid tower by the nonlinear time history method. The numerical results show that the seismic action effect by the response spectrum method is lower than those by the nonlinear time history method. And then it can be concluded that the response spectrum method is not suitable for calculating the seismic action effects of the steel–concrete hybrid tower directly and the time history analyses should be a necessary supplement for its seismic design. The first three modes have obvious contributions on the dynamic response of the steel–concrete hybrid tower.

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