漂浮式潮流能发电装置振动与波浪响应试验研究

Tests for oscillation and wave response of a floating tidal power generation device

为了研究基于竖轴水轮机的漂浮式潮流能发电装置的振动与波浪响应,设计试验模型和装置,进行水轮机转与不转的静水拖航试验和波浪试验,测量系泊链拉力和模型的纵摇响应。试验发现,系泊系统具有高频振动现象,V等于0.7 m/s、0.9 m/s,水轮机不转时,以及V等于0.9 m/s,水轮机转动时,系泊系统具有明显的慢摇现象,水轮机转动还带来了系泊链的低频拉力响应。水轮机转动使系泊系统的纵摇周期增大,载体模型的共振波长增加。与水轮机不转时相比,水轮机转动使低波长-载体模型长度比下模型的纵摇运动响应减小,对高波长-载体模型长度比下模型的纵摇运动影响较小。试验研究可为基于竖轴水轮机的漂浮式潮流能发电装置的理论研究与工程应用提供参考和借鉴。

In order to study the vibration and wave response of a floating tidal power generation device based on a vertical axis turbine, corresponding test models and eguipments were designed to conduct hydrostatic towage tests and wave tests with the turbine rotating and holding still, and the tension of the mooring chain and the pitching response of the model were measured. It was shown that the mooring system has a high-frequency vibration phenomenon and an obvious slow shake phenomenon when V is 0.7m/s and 0.9m/s with the turbine holding still and when V is 0.9m/s with the turbine rotating; the turbine rotation also causes the low-frequency tension response of the mooring chain; the rotation of the turbine leads to increase in not only the pitching period of the mooring system but also the resonance wavelength of the carrier model ; compared to the case with the turbine holding still, the turbine rotation reduces the pitching response of the cartier model under lower ratios of wavelength to carrier model length, while it has little influence on that under higher ratios of wavelength to carrier model length. Test results provided a reference for theoretic studying and engineering application of a floating tidal power generation device based on a vertical axis turbine.