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Multiscale analysis method of factory building vibration

A multi-scale analysis and vibration velocity technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as endpoint effects, energy leakage, and mode mixing, and achieve high feature extraction accuracy and good scene Practicality, the effect of suppressing modal aliasing

Active Publication Date: 2018-03-30
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
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Problems solved by technology

Commonly used methods to deal with complex non-stationary signals include wavelet analysis, empirical mode decomposition, etc. However, wavelet analysis is based on adjustable window Fourier transform, which has the problem of energy leakage, and empirical mode decomposition has modal mixing. issues such as overlap and endpoint effects

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  • Multiscale analysis method of factory building vibration
  • Multiscale analysis method of factory building vibration
  • Multiscale analysis method of factory building vibration

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.

[0020] Such as figure 1 As shown, the plant vibration multi-scale analysis method provided by the present invention comprises the following steps:

[0021] 1) Obtain the horizontal vibration velocity signals of wind hood +Y in the middle layer of the hydropower plant under different working conditions.

[0022] Field tests were carried out on the vibration of the powerhouse of the hydropower station, and the horizontal vibration velocity signals of the wind cover + Y in the middle layer were obtained under different working conditions. The working conditions adopted in the present invention are power generation 150MW, power generation 300MW, pumping conditions and pump...

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Abstract

The invention relates to a multiscale analysis method of factory building vibration, characterized by comprising the steps of 1), acquiring horizontal vibrational speed signals of a middle hood +Y ofa hydropower station building under different conditions; 2), using adaptive iterative filtering to decompose the horizontal vibrational speed signals of the middle hood +Y of the hydropower station building under different conditions so as to obtain a plurality of stable components corresponding to the horizontal vibration speed signal of the middle hood +Y of the hydropower station building under each condition; 3), using the multiple stable components corresponding to the horizontal vibration speed signal of the middle hood +Y of the hydropower station building under each condition to construct a standard characteristic vector of building vibration based on a percentile method, and using the standard characteristic vector to recognize heath state of building structure so as to finish multiscale analysis of building vibration. The method of the invention is widely applicable to the field of structural operation maintenance for hydropower station buildings.

Description

technical field [0001] The invention relates to a multi-scale analysis method for plant vibration, and belongs to the technical field of on-line monitoring and state detection. Background technique [0002] The powerhouse of a hydropower station is a building in a hydropower station where hydroturbines, hydroelectric generators and various auxiliary equipment are installed. It is not only a complex of hydraulic buildings, machinery and electrical equipment, but also a place for operating personnel to carry out production activities, keeping its structure stable. Particularly important. In order to ensure the structural safety of the powerhouse, real-time monitoring of the vibration of the powerhouse can reflect the vibration of the sensitive structure, avoid abnormal occurrences, and provide a strong guarantee for the safe and stable operation of the powerhouse of the hydropower station. The powerhouse of a hydropower station is a group of super-large underground caverns. I...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 安学利潘罗平田雨赵明浩刘娟
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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