1001-2060
2023
38
6
166
article
风浪异向下大型风力机动力学响应及非线性特征研究
Dynamic response and nonlinear characteristics of large wind turbine under windwave anisotropy
为探究风、浪不同入射角对风力机塔架动力学响应及其混沌特性影响，以DTU 10 MW近海单桩式风力机为研究对象，采用相图法及最大Lyapunov指数对风、浪异向下风力机塔架振动信号展开混沌特征分析。结果表明：塔顶前后向位移几乎不随波浪入射角改变而变化，塔顶侧向位移受波浪入射角影响较大；塔架弯矩随塔架高度增加而逐渐减小，且受波浪入射角影响较大；随着风速增大，塔顶侧向加速度波动剧烈程度逐渐降低，不同海况塔架前后向加速度波动差异较小；随着波浪入射角变化，各海况加速度最大Lyapunov指数均大于零，混沌特征明显。尤以湍流风速11.4 m/s、有义波高3.5 m时，在风波夹角为60°与210°时塔顶前后向及侧向加速度的最大Lyapunov指数最大，此时风力机塔顶稳定性较差。
In order to investigate the effect of different incidence angles of wind and waves on the dynamic response of wind turbine tower and its chaotic characteristics, the DTU 10 MW offshore monopile wind turbine was used as the research object. The phase diagram method and the maximum Lyapunov exponent were used to analyze the chaotic characteristics of wind and wave anisotropic wind turbine tower vibration signals. Results show that the foreaft displacement of the tower top hardly changes with the wave incidence angle, and the sideside displacement of the tower top is greatly affected by the wave incidence angle. The tower bending moment decreases gradually with the increase of tower height and is influenced by the wave incidence angle greatly; with the increase of wind speed, the fluctuation amplitude of the sideside acceleration of the tower top decreases gradually, and the fluctuation difference of foreaft acceleration of the tower top in different sea states is small; with the change of wave incidence angle, the maxi〖JP〗mum Lyapunov exponent of acceleration in each sea state is greater than zero, and the chaotic characteristics are obvious. Especially when the turbulent wind speed is 11.4 m/s and wave height is 3.5 m, the maximum Lyapunov exponents of the foreaft and sideside accelerations of the tower top are the largest when the wind wave angle is 60° and 210°, and the stability of the wind turbine tower top is poor at this time.
风浪异向；单桩式风力机；动力学响应；混沌特性；Lyapunov指数
wind and wave anisotropy，monopile wind turbine，dynamic response，chaotic characteristic，Lyapunov exponent
王海生,李志昊,缪维跑,李 春
WANG Hai-sheng, LI Zhi-hao, MIAO Wei-pao, LI Chun
rndlgc/article/abstract/202306019