发明名称 |
Schwingungsdämpfung in Windkraftanlagen |
摘要 |
Damping of oscillations of the second bending mode of a wind turbine is performed by means of one or more containers partly filled with a liquid for damping oscillations of the second natural bending frequency of the wind turbine. The damping means comprises a plurality of box shaped containers having a square cross section and being partly filled with liquid so as to provide a unidirectional damping with a logarithmic decrement of oscillations of the second natural bending frequency of the wind turbine of at least 4-8%. For off-shore wind turbines, the combined excitation of the wind and sea waves requires more damping, the damping is preferably equivalent to a logarithmic decrement of 10-15%. Furthermore, the invention relates to combined damping of oscillations of the first as well as the second bending mode of the wind turbine. <IMAGE> |
申请公布号 |
DE60034079(T2) |
申请公布日期 |
2007.11.22 |
申请号 |
DE2000634079T |
申请日期 |
2000.06.15 |
申请人 |
NEG MICON A/S |
发明人 |
NIELSEN, THOMAS STEINICHE BJERTRUP |
分类号 |
F03D1/06;F03D7/02;F03D7/04;F03D11/00 |
主分类号 |
F03D1/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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