Equivalent scaling method for the transient dynamic response of a megawatt-level wind turbine gearbox transmission system

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (2) : 205-215.

RAN Feng1,ZHU Caichao1,TAN Jianjun1,SONG Chaosheng1,ZHU Yongchao1,CHEN Shuai2

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Abstract

With the development of wind turbine gearbox towards 10MW and above ultra-high power, the problem of the full-size testing is limited by the power of the test stand becomes more and more obvious. In this paper, an equivalent scaling method is proposed for the transient dynamic response of the megawatt-level wind turbine gearbox transmission system. Taking a certain type of 5MW wind turbine gearbox as the research object, a wind turbine gearbox transmission system variable speed dynamic model is established by dimensional theory. The dynamic similarity relationship of equivalent reduction of wind turbine gearbox transmission system suitable for variable speed conditions is analyzed, and the inherent characteristics and vibration response of the prototype and scaled wind turbine gearbox transmission system are compared and analyzed. The research results show that the natural frequency and mode shape of the scaled wind turbine gearbox transmission system meet the similar relationship with the prototype, and the steady-state response and transient response of the scaled wind turbine gearbox transmission system meet the similar relationship with the prototype, and the maximum error is less than 3%. This method can provide a certain reference basis for the equivalent scale design of wind turbine gearbox.

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wind turbine gearbox / transmission system / dynamic similarity / modal analysis / dynamic response

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RAN Feng1,ZHU Caichao1,TAN Jianjun1,SONG Chaosheng1,ZHU Yongchao1,CHEN Shuai2. Equivalent scaling method for the transient dynamic response of a megawatt-level wind turbine gearbox transmission system[J]. Journal of Vibration and Shock, 2023, 42(2): 205-215

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