采用FAST软件对同一风场、2 MW风电机组的纯钢塔架和钢-混凝土组合塔架进行正常运行工况和急停工况的动力响应分析。结果表明：两种工况下,纯钢塔架塔顶位移响应均大于钢混塔架;在正常运行工况下,两类塔架塔顶处加速度响应受3倍、6倍风轮转速对应的频率影响较大,且纯钢塔架受二阶振型影响明显;急停工况下,塔架振动加剧,纯钢塔架相比于钢混塔架更加敏感,两种塔架前后振动方向加速度响应主要受塔架一阶振型影响,而侧向振动方向加速度响应受塔架二阶振型影响明显。
Abstract
Software FAST is used to study the dynamic response of a single tube steel tower and a steel-concrete combined tower of a 2 MW wind turbine in the same wind farm under two typical working conditions - normal operation condition and emergency shut-down condition. The analysis results show that the displacement response at the top of the single steel tower is greater than that of the steel-concrete tower under both conditions, and under the normal operating condition, the acceleration response of the two towers is affected by frequency corresponding to the three and six times wind wheel rotation rate (3P, 6P). The dynamic response of the steeltower is obviously affected by the second-order vibration mode, and under the emergency shut-down condition, the vibration of the towers intensify, and the single steel tower is more sensitive than the steel-concrete tower, besides, the acceleration response in the fore-and-aft direction of the two towers is mainly affected by the first-order vibration mode, while in the lateral direction the acceleration response of the towers is obviously affected by the second-order vibration mode.
关键词
风电机组 /
塔架 /
动力响应 /
正常运行工况 /
急停工况
Key words
wind turbine /
tower /
dynamic response /
normal operating condition /
emergency shut-down condition
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