The tower of onshore wind turbine is the supporting part whole machine, and its service related to safety state machine. In order ensure machine operation, vibration analysis needed. This paper takes as research object, establishes 3D model tower, uses Ansys Workbench software carry out finite element modal tower. According results analysis, measured scheme designed test data onto analyzed by p...

Transmission towers are prone to collapse under strong wind load, resulting in significant economic losses. In order investigate the mechanism and failure modes of transmission tower load whether vibration factor can greatly reflect increasing effect fluctuating wind, finite element method (FEM) is utilized analyze ultimate bearing capacity a typical 220 kV tower. The results show that loads us...

A technical challenge in deploying a floating offshore wind turbine shallow water is dissolution of the poor performance catenary mooring system due to decreased absorbable potential energy. It common practice improve by using buoys and sinkers enhance energy absorbed system. In this research, tower-shaped buoy (tower-buoy) proposed which sinker integrated structure. design, relatively large ar...

Li, Yuwei. "Coupled computational fluid dynamics/multibody dynamics method with application to wind turbine simulations." PhD ii To my family iii ACKNOWLEDGMENTS I would like to express my greatest appreciation to my advisor, Associate Professor Pablo M. Carrica, who has been continuously supporting me throughout my Ph.D. research with his knowledge, experience, enthusiasm and patience. I am gr...

The spatial and temporal components of a published wind power parameterization method are evaluated using observed winds (9 m to 90 m) from 7 years of data collected at 4 towers in the Kennedy Space Center/Cape Canaveral Air Force Station network. The temporal component is governed by two parameterization inputs which represent the amplitude and mean of an assumed sinusoidal diurnal variation o...

Short-term wind speed forecasting is useful for power system to regulate power dispatching plan, decrease reserve power needed and increase the reliability of system. The method of the short-term wind speed prediction is proposed in this paper. The data of wind speed in Dafeng, Jiangsu Province of China is predicted by the model combined with the grey system theory (GST). A grey system model co...

The results from a 1:50 scale aeroelastic model of self-supported steel lattice tower subjected to simulated hurricane winds are presented. considered is typical structure that used as part tower-insulator-conductor system for electrical transmission infrastructure. tests were conducted at the NSF Wall Wind Experimental Facility (WOW EF) Florida International University (FIU). was tested variou...

Based on preliminary assumptions and analysis, mathematical models have been used to estimate the behavior of the fires in the twin towers of the World Trade Center (WTC) on September 11, 2001. The hijacked-plane collision with each tower produced significant structural damage, generated a spectacular external fireball, and started burning within the tower. The fuel consumed by the fireball was...

One of the wind turbine nacelles at Taikoyama wind farm collapsed due to the fatigue failure of high tension bolts. Strain gauges and accelerometers were installed on the wind turbine to verify the aerodynamic model. Furthermore a FEM model was built in order to find out the relationship between tower tube and high tension bolts at the position of flange joint, where the fracture occurred. When...

Abstract To study the difference in wind-induced response of transmission tower caused by downburst and well-conditioned wind field, this paper uses harmonic superposition method to simulate field field. The responses under two farms are obtained compared through analysis. fields on quite different, can cause a larger response.