Laying method for vibration monitoring points of offshore wind power generation support structure

Abstract

The invention provides a laying method for vibration monitoring points of an offshore wind power generation support structure. On the one hand, an initial laying scheme can be provided by the aid of the traditional sensor position optimization technology, and on the other hand, mounting complexity of sensor position can be considered more fully, namely position of high water depth in the initial laying scheme is abandoned and position of non-connecting points low in water depth is added properly. Therefore, model error between a finite element model and an actual structure can be considered, a complete vibration model of an offshore wind power generation structure can be obtained relatively accurately. In addition, the method has a unique advantage different from the optimization scheme in traditional sensor position optimization that the sensor laying scheme can be changed according to different modal identification orders, and a modal vibration model of the offshore wind power generation structure is obtained by least sensors at sensor position easiest to mount to the maximum extent.

Description

technical field [0001] The invention relates to a new sensor position layout method aiming at obtaining the mode shape of the support structure of offshore wind power generation with the same precision, especially for the selection of vibration points of the support structure of deep water jacket type offshore wind power generation. Background technique [0002] Wind power generation is the main way to utilize wind energy and is the fastest growing green energy technology in the world. Offshore wind conditions are better than those on land, and the offshore wind speed at 10 km offshore is usually about 25% higher than that on the coastal land; the offshore wind turbulence intensity is small, with a stable dominant wind direction, and the fatigue load on the unit is low, making the fan life longer; The shear is small, so the tower can be lower; the development and utilization of wind energy at sea is less restricted by problems such as noise, landscape, birds, and electromagn...

AI Technical Summary

Problems solved by technology

Although the monitoring signal can reflect the operation of wind turbines to a certain extent, for offshore wind power support structures, because the sensor is far away from the support structure, and the support structure is basically located below the water surface, it is impossible to know the support structure using the existing sensor data. vibration conditions, including the modal information of the supporting structure, especially the mode shapes

Conventional sensor position optimization technology, the optimization process often requires the modal shape of the established finite element model, but when the error between the actual structure and the finite element model is large, it will inevitably cause the finite element modal shape and the corresponding modal vibration of the actual structure. In other words, the sensor position obtained based on the finite element mode shape is not the sensor position required by the actual structure; especially for offshore structures, the difficulty and cost of installing sensors underwater can be imagined

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