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Dynamic simulation platform, simulation system and method for bolt loosening fault of tower vibration

A bolt loosening and dynamic simulation technology, applied in design optimization/simulation, geometric CAD, etc., can solve the problems that the simulation results cannot be verified, and the bolt loosening fault monitoring method cannot be verified experimentally, etc.

Pending Publication Date: 2020-02-07
国家电投集团徐闻风力发电有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems existing in the existing technology in the experimental research on bolt loosening fault characteristics on the actual wind turbine tower bolts, the simulation results cannot be verified and the new bolt loosening fault monitoring method cannot be verified experimentally, etc. The invention provides a dynamic simulation platform, simulation system and method for bolt loosening faults caused by tower vibration

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  • Dynamic simulation platform, simulation system and method for bolt loosening fault of tower vibration
  • Dynamic simulation platform, simulation system and method for bolt loosening fault of tower vibration
  • Dynamic simulation platform, simulation system and method for bolt loosening fault of tower vibration

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Embodiment 1

[0084] Embodiments of the present invention can carry out dynamic research experiments on related bolt loosening faults (scribing method, vibration monitoring method, etc.), such as carrying out bolt loosening experiments based on embedded strain. The main principle is that the swinging of the swinging device can drive the swinging of the tower. In this way, the low-frequency dynamic vibration state of the tower is simulated, so as to monitor the internal strain of the bolts with embedded strain gauges in real time. Different degrees of looseness are expressed by changing different torque values ​​of the bolts, and the dynamic test is carried out under the condition of the same height of the pendulum of the swing device. It is of great significance to judge the state of bolt loosening by collecting and analyzing the Roa accounting strain value data of different loosening degrees, and then obtaining the corresponding characteristic form and expression.

[0085] In addition, the...

Embodiment 2

[0087] refer to figure 1 , The bolt loosening fault research experimental platform for dynamically simulating wind turbine tower vibration provided by the embodiment of the present invention is mainly composed of a tower model, a flange, bolts, a base, a swing device, and a base.

[0088] The tower model is mainly the subject of the experiment. It is processed from the same material as the actual tower under the condition that the power of the actual wind turbine and the size of the tower meet the requirements through proportional reduction and strength simulation.

[0089] The flange is mainly a bolt-connected part with a fixed installation position. Its material is consistent with that of the actual tower. The specific size is determined after the strength simulation results of the tower model meet the requirements.

[0090] Bolts are mainly high-strength bolts and the main research object. The material and size are determined according to specific experimental requirements....

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Abstract

The invention belongs to the technical field of wind driven generator tower safety monitoring, discloses a dynamic simulation platform, simulation system and method for the bolt loosening fault of tower vibration. A tower model is formed by welding steel plates and used for carrying out model machining under the condition that it is determined that the rigidity and structure of the tower model meet the requirements after equal-proportion reduction modeling simulation is carried out according to the power of different wind driven generators and the model size of a tower; the flanges are connected with the towers in a thick steel plate punching and welding mode and used for connecting the two towers through high-strength bolts, and the number of flange holes and the hole diameter are determined according to specific requirements. The bolt is connected with the flange through a torque wrench; the base is used for preventing the lower end of the tower from shaking left and right; the swingdevice is welded to the tower through a steel pipe. The base is a concrete block for fixing a wind turbine tower base and is used for preventing the bottom end from shaking. According to the invention, great help can be provided for bolt loosening fault monitoring and fault feature extraction experiments.

Description

technical field [0001] The invention belongs to the technical field of wind power generator tower safety monitoring, and in particular relates to a dynamic simulation platform, simulation system and method for bolt loosening failure of tower vibration. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: in recent years, with the continuous deterioration of the global climate and the depletion of fossil energy, new energy has gradually entered people's field of vision. As a relatively mature clean and renewable energy, the installed capacity of wind energy has grown rapidly. Due to the complex working environment of the wind turbine, which is in the shear wind, gust and typhoon formed on the ground layer, the wind turbine tower, as an important bearing part of the unit, belongs to a typical thin and thin shell structure. Free and subject to the gravity and aerodynamic loads of the nacelle and the wind rotor, this ...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/17
Inventor 吴恩军陈洪军屈文峰霍崇梁郑钊黄香朝李真荣杨涛沈忠明
Owner 国家电投集团徐闻风力发电有限公司
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