This study compares the dynamic behaviour of a conventional and a compact gearbox for the DTU 10 MW wind turbine supported on a monopile offshore structure. The conventional gearbox configuration is composed of two planetary epicyclic stages and one parallel stage, while the compact gearbox configuration consists of a fixed planetary stage and a differential compound epicyclic stage. The design methodology for these two gearboxes is described, and the final gearbox specifications show a lighter weight and smaller volume for the compact gearbox design compared to the conventional one. Computational gearbox models are established using the multi-body system dynamic analysis method. A decoupled approach is employed for the gearbox load effect analysis. Comparisons of the dynamic behaviour between these two gearboxes are conducted under pure torque load cases, tangential pin position error conditions and non-torque load cases. The results demonstrate that the compact gearbox has better dynamic performance under different torque load cases and is more robust to withstand the effects of manufacturing errors and rotor non-torque loads compared to the conventional gearbox. It is believed that the proposed compact gearbox concept is promising and would be a good alternative for multi-megawatt floating wind turbines, although challenging with respect to the design and operation complexity.

中文翻译：

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海上风电机组 10 MW 常规齿轮箱与紧凑型齿轮箱动力特性对比研究

本研究比较了支撑在单桩海上结构上的 DTU 10 MW 风力涡轮机的传统齿轮箱和紧凑型齿轮箱的动态行为。常规齿轮箱配置由两个行星行星级和一个并联级组成，而紧凑型齿轮箱配置由一个固定行星级和一个差速复合行星级组成。描述了这两种齿轮箱的设计方法，最终的齿轮箱规格表明，与传统齿轮箱设计相比，紧凑型齿轮箱设计具有更轻的重量和更小的体积。使用多体系统动力学分析方法建立计算齿轮箱模型。齿轮箱负载效应分析采用解耦方法。在纯扭矩负载情况、切向销位置误差条件和非扭矩负载情况下，对这两种齿轮箱之间的动态行为进行了比较。结果表明，与传统齿轮箱相比，紧凑型齿轮箱在不同扭矩负载情况下具有更好的动态性能，并且更能承受制造误差和转子非扭矩负载的影响。据信，所提出的紧凑型齿轮箱概念是有前途的，并且将是多兆瓦浮动风力涡轮机的良好替代方案，尽管在设计和操作复杂性方面具有挑战性。结果表明，与传统齿轮箱相比，紧凑型齿轮箱在不同扭矩负载情况下具有更好的动态性能，并且更能承受制造误差和转子非扭矩负载的影响。据信，所提出的紧凑型齿轮箱概念是有前途的，并且将是多兆瓦浮动风力涡轮机的良好替代方案，尽管在设计和操作复杂性方面具有挑战性。结果表明，与传统齿轮箱相比，紧凑型齿轮箱在不同扭矩负载情况下具有更好的动态性能，并且更能承受制造误差和转子非扭矩负载的影响。据信，所提出的紧凑型齿轮箱概念是有前途的，并且将是多兆瓦浮动风力涡轮机的良好替代方案，尽管在设计和操作复杂性方面具有挑战性。