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Wind-induced random vibration analysis method for power transmission tower and related device

A technology of random vibration and analysis method, which is applied in the field of electric power, can solve the problems of low calculation efficiency and achieve the effect of simple calculation, low solution efficiency and high efficiency

Pending Publication Date: 2021-02-19
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Application Information

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Problems solved by technology

[0004] The invention provides a wind-induced random vibration analysis method and related devices for transmission towers, which are used to solve the technical problem of low calculation efficiency in the prior art when performing wind resistance analysis on large transmission towers

Method used

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  • Wind-induced random vibration analysis method for power transmission tower and related device
  • Wind-induced random vibration analysis method for power transmission tower and related device
  • Wind-induced random vibration analysis method for power transmission tower and related device

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Embodiment 1

[0047] see figure 1 , Embodiment 1 of a wind-induced random vibration analysis method of a transmission tower provided by the present invention: includes:

[0048]Step 101. Acquire structural parameters of the transmission tower, and establish a structural response coefficient matrix of the transmission tower according to the structural parameters. The structural parameters include: mass array, damping array, and stiffness array.

[0049] It can be understood that the structural parameters of the transmission tower are input into the preset calculation formula for calculation to obtain the structural response coefficient matrix of the transmission tower, and the structural parameters include: mass matrix, damping matrix and stiffness matrix, etc.

[0050] Step 102, extracting the row matrix corresponding to the preset structural key response in the structural response coefficient matrix to obtain the structural key response coefficient matrix of the transmission tower.

[005...

Embodiment 2

[0062] see figure 2 , Embodiment 2 of a wind-induced random vibration analysis method of a transmission tower provided in an embodiment of the present invention includes:

[0063] Step 201. Establish a finite element model of the transmission tower according to the geometric information and material information of the transmission tower; extract parameters from the finite element model to obtain the structural parameters of the transmission tower, and establish the transmission tower according to the structural parameters based on the calculation formula of the structural response coefficient matrix The structural response coefficient matrix of , the structural parameters include: mass matrix, damping matrix and stiffness matrix.

[0064] In this embodiment, the geometric information and material information are input into the large-scale general-purpose finite element software to obtain the finite element model of the transmission tower, and then the parameters of the finite...

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Abstract

The invention discloses a wind-induced random vibration analysis method for a power transmission tower and a related device. The method comprises the following steps: establishing a structural response coefficient matrix of the power transmission tower according to structural parameters of the power transmission tower; extracting a row matrix corresponding to the structure key response in the structure response coefficient matrix to obtain a structure key response coefficient matrix; obtaining a wind pressure time history of the power transmission tower based on the relationship between the wind speed and the wind pressure according to the wind speed time history sample with the preset height, and substituting the wind pressure time history into a wind load formula to calculate and obtaina wind load time history sample of the power transmission tower; substituting the structure key response coefficient matrix and the wind load time history sample into a structure key response formulato calculate and obtain a structure key response sample of the power transmission tower; and according to the structure key response sample, based on the time-varying mean value and the variance formula, respectively calculating and obtaining the time-varying mean value and the time-varying variance of the structure key response sample. The technical problem that in the prior art, when wind resistance analysis is conducted on a large power transmission tower, the calculation efficiency is low is solved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a wind-induced random vibration analysis method and a related device of a power transmission tower. Background technique [0002] There are many methods in the study of random vibration, such as power spectrum method, virtual excitation method, and probability density evolution method. These methods have been applied in many practical engineering fields, and some scholars have applied these methods to the wind resistance research of transmission towers. [0003] However, these existing wind-induced random vibration methods are generally only suitable for solving random responses under steady winds. For wind loads with obvious non-stationary characteristics such as typhoons and hurricanes, in order to obtain the evolution power spectrum of the structural response, the first and second The first-order statistical moments require a large number of time history integration ca...

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Application Information

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IPC IPC(8): G06F30/23G06F17/16G06F17/18
CPCG06F30/23G06F17/16G06F17/18
Inventor 刘小璐聂铭谢文平罗啸宇黄正钟万里
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID