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Fast modeling and simulation method for natural vibration characteristics of wind turbine flexible tower system

A technology of natural vibration and modeling method, applied in the field of multi-body system dynamics, can solve problems such as low calculation efficiency and difficulty of high-order continuous field functions, and achieve high calculation efficiency, low matrix order, and small calculation amount Effect

Active Publication Date: 2021-09-17
YANGZHOU UNIV
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Problems solved by technology

Although the finite element method has strong versatility, it cannot complete the dynamic modeling of multi-rigid and flexible body systems alone
In addition, it is difficult to construct high-order continuous field functions, and the calculation efficiency is low

Method used

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  • Fast modeling and simulation method for natural vibration characteristics of wind turbine flexible tower system
  • Fast modeling and simulation method for natural vibration characteristics of wind turbine flexible tower system
  • Fast modeling and simulation method for natural vibration characteristics of wind turbine flexible tower system

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Experimental program
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Effect test

Embodiment

[0163] Multibody dynamics modeling and vibration characteristics analysis were carried out for the soft tower of the three-blade horizontal axis wind turbine model NORDEX S70 / 1500. The natural circular frequency calculation results of the soft tower system are as follows Figure 5shown. The abscissa in the figure is the circular frequency, and the ordinate represents the size of the Δ value. When the Δ value is close to 0, the circular frequency can be obtained. The vertical lines shown in the figure are the root search process, and each vertical line corresponds to the circular frequency of the mode. Figure 6 is the calculated first-order mode shape of the soft tower of the wind turbine, (a) is the z direction; (b) is the y direction; Figure 7 is the second-order mode shape of the soft tower of the wind turbine, (a) is the z direction; (b) is the y direction; Figure 8 It is the third-order mode shape of the soft tower of the wind turbine, (a) is the z direction; (b) is ...

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Abstract

The invention discloses a fast modeling and simulation method for natural vibration characteristics of a wind turbine flexible tower system comprising the following steps: reasonably simplifying a wind turbine flexible tower system, and dispersing the system into multi-body dynamic elements; based on a multi-body system transfer matrix method, deducing a tower tube beam transfer matrix considering the gravity effect; determining a transfer matrix of other multi-body dynamic elements; determining boundary conditions, and establishing a total transfer equation of the flexible tower system; and solving the total transfer equation to obtain the vibration characteristics of the flexible tower system. According to the method, the structural details of the wind turbine flexible tower system are fully considered, the calculation efficiency is high, the simulation precision is high, rapid modeling and natural vibration characteristic analysis of the wind turbine flexible tower system can be achieved, and meanwhile, and a reference is provided for dynamic modeling and vibration characteristic analysis of a slender flexible body system similar to a flexible tower structure in engineering.

Description

technical field [0001] The invention relates to the technical field of multi-body system dynamics, in particular to a soft tower system of a wind turbine. Background technique [0002] With the rapid development of the wind energy industry, in order to capture wind energy more effectively, large-scale megawatt wind turbines are gradually becoming the mainstream. In recent years, megawatt wind turbines are mainly supported by highly flexible towers. The flexible tower can support the hub of the wind turbine to a height of 110-150m, and the cost is relatively low. The tower frame is generally a thin-walled steel hollow cylinder, which has the characteristics of large flexibility, small damping and light weight. But the fluid-structure interaction (FSI) vibration caused by the soft tower of the wind turbine is more prominent. The life cycle of the wind turbine is mainly affected by its dynamic response. In order to avoid the resonance of the wind turbine in the range of flow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/28G06F113/08G06F113/06G06F119/14
CPCG06F30/17G06F30/28G06F2113/08G06F2113/06G06F2119/14
Inventor 陈东阳顾超杰徐瑞刘锟杨洁丁敏马冉倪正义
Owner YANGZHOU UNIV
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