Vibration of wind turbine components due to aero-elasticity will cause structural failure. Here t... more Vibration of wind turbine components due to aero-elasticity will cause structural failure. Here the structural failure refers to the high rise structures, which fails to withstand in its operating condition. There are 100+ structural failures recorded until Sep 2014 (Caithness wind farm’s data). Vibration affects the performance as well as the expected life of the components. The harmful things with high rise structures are: Low natural frequency, more prone to bending, wind-induced oscillations and torsional oscillations. The extreme wind conditions in the regions not prone to hurricanes will also experience these structural failures. High rise structures are not stable and have more static deflections too. The causes are wind load, restoring moment, vortex shedding and the motion of structures. A technique called Tuned Mass Damper (TMD) is proposed here to mitigate the wind induced oscillations via, Pendulum type Tuned Mass Damper (PTMD) have an oscillating mass about a fixed pivot. The mass associated with pendulum will produce a restoring force & will make the vibrating structure to be in equilibrium state or stable state. Results shows 5% reduction in tower frequency for 1% of tower mass as bob mass and reduction in time taken to achieve equilibrium as well as displacement of the tip of the tower.
Vibration of wind turbine components due to aero-elasticity will cause structural failure. Here t... more Vibration of wind turbine components due to aero-elasticity will cause structural failure. Here the structural failure refers to the high rise structures, which fails to withstand in its operating condition. There are 100+ structural failures recorded until Sep 2014 (Caithness wind farm’s data). Vibration affects the performance as well as the expected life of the components. The harmful things with high rise structures are: Low natural frequency, more prone to bending, wind-induced oscillations and torsional oscillations. The extreme wind conditions in the regions not prone to hurricanes will also experience these structural failures. High rise structures are not stable and have more static deflections too. The causes are wind load, restoring moment, vortex shedding and the motion of structures. A technique called Tuned Mass Damper (TMD) is proposed here to mitigate the wind induced oscillations via, Pendulum type Tuned Mass Damper (PTMD) have an oscillating mass about a fixed pivot. The mass associated with pendulum will produce a restoring force & will make the vibrating structure to be in equilibrium state or stable state. Results shows 5% reduction in tower frequency for 1% of tower mass as bob mass and reduction in time taken to achieve equilibrium as well as displacement of the tip of the tower.
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