scholarly journals Study on Novel Yaw Error Strategy for Wind Turbines Based on a Multi-Body Dynamics Method

2021 ◽  
Vol 9 ◽  
Author(s):  
Yazhou Wang ◽  
Xin Cai ◽  
Bofeng Xu ◽  
Zhen Li
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Optimization Strategy ◽  
Structure Control ◽  
Body Dynamics ◽  
Flexible Body Dynamics ◽  
Yaw Bearing ◽  
Multi Body ◽  
Dynamics Models ◽  
Dynamics Method

At present, using structural dynamics models is the most commonly used and effective method to simulate the dynamic characteristics of large wind turbine. This paper used the multi-body dynamics method to construct the precise multi-flexible body dynamics model of a wind turbine coupled with aerodynamics/structure/control. The model can realize multi-disciplinary co-simulation interactions, and the accuracy was verified by comparing the numerical simulation data with the measured data. The allowable yaw error of a wind turbine is typically simplified to two or three fixed values according to the wind speed range, which cannot often adapt to the high and unsteady change characteristics of wind speed and direction under special conditions. In this paper, an accurate calculation method of allowable yaw error threshold based on measured wind speed and the corresponding optimization strategy of large yaw error are proposed, which not only avoid unnecessary shutdown and improve the availability, but also reduce the load of yaw bearing and improve the safety.

A study of dynamic response of a wind turbine blade based on the multi-body dynamics method

2020 ◽  
Vol 155 ◽  
pp. 358-368 ◽  
Author(s):  
Jin Xu ◽  
Lei Zhang ◽  
Xue Li ◽  
Shuang Li ◽  
Ke Yang
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Body Dynamics ◽  
Multi Body ◽  
Dynamics Method

Analysis for the deployment of single-point mooring buoy system based on multi-body dynamics method

2012 ◽  
Vol 26 (3) ◽  
pp. 495-506 ◽  
Author(s):  
Zong-yu Chang ◽  
Yuan-guang Tang ◽  
Hua-jun Li ◽  
Jian-ming Yang ◽  
Lei Wang
Keyword(s):  
Single Point ◽  
Body Dynamics ◽  
Multi Body ◽  
Dynamics Method

Coupled multi-body dynamics and CFD for wind turbine simulation including explicit wind turbulence

2015 ◽  
Vol 76 ◽  
pp. 338-361 ◽  
Author(s):  
Y. Li ◽  
A.M. Castro ◽  
T. Sinokrot ◽  
W. Prescott ◽  
P.M. Carrica
Keyword(s):  
Wind Turbine ◽  
Body Dynamics ◽  
Wind Turbulence ◽  
Multi Body

Optimal Design of Horizontal Axis Wind Turbine Blades

2008 ◽  
Author(s):  
Ohad Gur ◽  
Aviv Rosen
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Design Method ◽  
Turbine Blades ◽  
Horizontal Axis ◽  
Optimization Strategy ◽  
Wind Turbine Blades ◽  
Horizontal Axis Wind Turbine ◽  
Wind Speeds ◽  
Design Variables

The optimal aerodynamic design of Horizontal Axis Wind Turbine (HAWT) is investigated. The Blade-element/Momentum model is used for the aerodynamic analysis. In the first part of the paper a simple design method is derived, where the turbine blade is optimized for operation at a specific wind speed. Results of this simple optimization are presented and discussed. Besides being optimized for operation at a specific wind speed, without considering operation at other wind speeds, the simple model is also limited in the choice of design goals (cost functions), design variables and constraints. In the second part of the paper a comprehensive design method that is based on a mixed numerical optimization strategy, is presented. This method can handle almost any combination of: design goal, design variables, and constraints. Results of this method are presented, compared with the results of the simple optimization, and discussed.

Quasi-Variational Principles of Single Flexible Body Dynamics

2010 ◽  
Author(s):  
Haiyan Song ◽  
Jiansheng Zhou ◽  
Lifu Liang ◽  
Zongmin Liu
Keyword(s):  
Variational Principle ◽  
Variational Principles ◽  
Deformable Body ◽  
Rigid Body Dynamics ◽  
Flexible Body ◽  
Cross Link ◽  
Body Dynamics ◽  
Flexible Body Dynamics ◽  
Multi Body

The theoretical analysis of flexible multi-body system is a long-term and complicated problem. So the single flexible body dynamics should be studied firstly. Quasi-variational principle of non-conservative single flexible body dynamics is established under the cross-link of particle rigid body dynamics and deformable body dynamics. Some important problems are studied in quasi-variational principle of non-conservative single flexible body dynamics. The vibration problem of unrestrained beam can be solved very well by using quasi-variational principle.

Simulation Research on Braking Safety Properties of Aircraft Traction System

2009 ◽  
Vol 419-420 ◽  
pp. 705-708 ◽  
Author(s):  
Neng Jian Wang ◽  
Li Jie Zhou ◽  
Qiang Song ◽  
De Fu Zhang
Keyword(s):  
Critical Conditions ◽  
Safety Properties ◽  
Simulation Research ◽  
Straight Line ◽  
Body Dynamics ◽  
Braking Torque ◽  
Traction System ◽  
Multi Body ◽  
Dynamics Models ◽  
The Relationship

The jack-knifing tendency of aircraft traction system during braking was discussed and analyzed using multi-body dynamics models that consist of aircraft-towing tractor, aircraft draw link and aircraft. The braking critical conditions of the aircraft traction system for straight-line braking and turning braking were discussed and analyzed respectively. In the case of straight-line braking, the effect of friction coefficient on the maximum braking torque is described. In the case of turning braking, the relationship between the maximum baking torque and relative angle is obtained.

Vibrating Simulation of Diesel Engine Based on Multi-Body Dynamics

2011 ◽  
Vol 97-98 ◽  
pp. 706-711 ◽  
Author(s):  
Kang Shao ◽  
Chang Wen Liu ◽  
Fong Rong Bi ◽  
Xian Feng Du ◽  
Xia Wang ◽  
...  
Keyword(s):  
Diesel Engine ◽  
System Analysis ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Dynamics Simulation ◽  
Main Bearing ◽  
Engine Vibration ◽  
Body Dynamics ◽  
Flexible Body Dynamics ◽  
Multi Body

Taking example of a four-cylinder inline diesel engine that used in vehicle, this paper makes an assembly engine of three-dimensional that based on virtual prototype technology. While using the flexible-body dynamics simulation, the main bearing load that effect engine’s vibration will be gained. And the key point vibration response will be gained when the support part constrained. The experimental results coincide with the simulation results shows the correction of the simulation analysis. The initial stage of the vibration can be predicted by using the method of multi-body system analysis, and this guide the designer to identify the engine vibration.

Cartridge-Case Extracting Analysis of some Breech Mechanism Based on Flexible Body Dynamics Method

2010 ◽  
Vol 43 ◽  
pp. 338-341
Author(s):  
Wen Xian Tang ◽  
Jian Zhang ◽  
Pan Zhang
Keyword(s):  
Nonlinear Finite Element ◽  
Flexible Body ◽  
Nonlinear Finite Element Method ◽  
Dynamics Model ◽  
Average Speed ◽  
Body Dynamics ◽  
Flexible Body Dynamics ◽  
Cartridge Case ◽  
Dynamics Method ◽  
Abaqus Software

Dynamic characteristics of the breech mechanism directly affect warship’s reliability. Most of the research on the breech mechanism is related to locking chamber and firing primer, while few articles are found out about extracting cartridge-case. In this paper, nonlinear finite element method is used to research on flexible body dynamics of the breech mechanism. At first, structure and cartridge-case extracting process is analyzed. Then stresses and case speeds caused during the extracting process are tested. Flexible body dynamics model of some breech mechanism is built by using PROE, Hypermesh and ABAQUS software. Three models are used to compared with the experiment, which include three different element types. Finally, kinetic energy, internal energy, extractor stresses and case average speed are analyzed after wear of the extracting template.

Modeling and Simulation Analysis of Certain Vehicular Gatling Gun

2013 ◽  
Vol 275-277 ◽  
pp. 2467-2470
Author(s):  
Tao Li ◽  
Rui Lin Wang ◽  
Long Bo Sheng
Keyword(s):  
Simulation Analysis ◽  
Flexible Body ◽  
Response Characteristics ◽  
Vehicle Velocity ◽  
Impact Position ◽  
Body Dynamics ◽  
Velocity Condition ◽  
Flexible Body Dynamics ◽  
Multi Body ◽  
Exterior Ballistics

To study the influence of barrel’s deformation and vehicle velocity to certain vehicular Gatling gun, a virtual simulation with rigid-flexible coupling was established by using ADAMS/Flex module based on rigid multi-body dynamics and flexible body dynamics theories. Considering the interaction of the tires and road surface, vehicle and machine gun, the dynamic analysis and calculation of exterior ballistics were completed in various vehicle velocity condition, the muzzle response characteristics and impact position were obtained. The Model is testified rational, accuracy and effective by comparing simulating results with the experimental data of the velocity and displacement of barrel, which has laid the foundation for further simulation and structural optimization.

Sign in / Sign up

Export Citation Format

Share Document