Library filed under Structural Failure from Denmark

Blades fly off runaway wind turbine

The blades and gearbox have been spun off a wind turbine in western Jutland after a malfunction allowed it to reach to dangerous speeds in high winds. ..."We cannot get close to it until the wind dies down,” Oluf Jakobsen, from the local Morsø municipality  explained on Friday morning. “There’s nothing we can do but sit and wait for the outcome." 
16 Jan 2015

Vestas blades break in Denmark

Two 44-metre blades have broken on a Vestas V90 3MW turbine commissioned at a Danish wind farm in December. The blades came off “approximately a third of the distance from the tip end” on Sunday at the site close to the town of Sæby in Northern Jutland, Vestas said.
29 Jan 2014

Wind turbines certified despite construction error

A construction flaw in the foundations of many sea-based wind turbines was not discovered by inspectors who approved the structures' operation One of the most common foundations for sea-based wind turbines has a critical flaw but was nonetheless approved by a Nordic certification company, reports trade journal Ingeniøren. ...‘It's something no one could foresee and can give any engineer nightmares,' he said.
7 Apr 2010

Final report on investigation of a catastrophic turbine failures, February 22 and 23, 2008

Endelig_redeg%c3%b8relse_for_haveriforl%c3%b8b_ved_halling_og_sidinge2_thumb Following the catastrophic failure of two Vestas wind turbines on Feb 22 and 23, 2008, the Danish energy agency requested an investigation into the events. A report was produced by engineers at Risø DTU. Below is the report translated into English. The original report, in Danish, can be accessed by clicking on the link below. A video of one of the failures can be seen here: http://www.windaction.org/videos/14294 . It is important to note that the debris from the first turbine failure which occurred on February 22 spread as far as 700 meters (2200 feet) away. Risø DTU is formerly a government research institution under the Danish Ministry of Science, Technology and Innovation.
1 Dec 2008

Windmill in Denmark explodes

A windmill in Denmark collapsed during a storm in Denmark on Feb 22, 2008. The braking system failed while two technicians worked in the turret at the top. The technicians were able to get out before the collapse. Pieces of the shattered turbine were sent more than 500 meters away. Additional footage can be viewed by clicking here.   Duration: 40 seconds
22 Feb 2008

The Dangers of Wind Power

After the industry's recent boom years, wind power providers and experts are now concerned. The facilities may not be as reliable and durable as producers claim. Indeed, with thousands of mishaps, breakdowns and accidents having been reported in recent years, the difficulties seem to be mounting. Gearboxes hiding inside the casings perched on top of the towering masts have short shelf lives, often crapping out before even five years is up. In some cases, fractures form along the rotors, or even in the foundation, after only limited operation. Short circuits or overheated propellers have been known to cause fires. All this despite manufacturers' promises that the turbines would last at least 20 years.
24 Aug 2007

http://www.windaction.org/posts?location=Denmark&p=2&topic=Structural+Failure
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