KR100394172B1 - Method for estimating dynamic parameters of structure, making use of morlet wavelet transform - Google Patents

Method for estimating dynamic parameters of structure, making use of morlet wavelet transform Download PDF

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Publication number
KR100394172B1
KR100394172B1 KR1020030024411A KR20030024411A KR100394172B1 KR 100394172 B1 KR100394172 B1 KR 100394172B1 KR 1020030024411 A KR1020030024411 A KR 1020030024411A KR 20030024411 A KR20030024411 A KR 20030024411A KR 100394172 B1 KR100394172 B1 KR 100394172B1
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KR
South Korea
Prior art keywords
making use
estimating
wavelet transform
morlet wavelet
dynamic parameters
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KR1020030024411A
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Korean (ko)
Inventor
Hyung Ghee Park
Original Assignee
Do Dam Engineering & Construct
Kim Yang Won
Hyung Ghee Park
Yu Seong
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Application filed by Do Dam Engineering & Construct, Kim Yang Won, Hyung Ghee Park, Yu Seong filed Critical Do Dam Engineering & Construct
Priority to KR1020030024411A priority Critical patent/KR100394172B1/en
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Publication of KR100394172B1 publication Critical patent/KR100394172B1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/02—Vibration-testing by means of a shake table
    • G01M7/025—Measuring arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)

Abstract

PURPOSE: A method for estimating dynamic parameters of a structure, making use of Morlet wavelet transform is provided to estimate the natural frequency, the damping rate, and the vibration mode shape through one-time Morlet wavelet transform. CONSTITUTION: A method for estimating dynamic parameters of a structure, making use of Morlet wavelet transform comprises steps of measuring the frequency at a specified position of the structure, making use of a measuring instrument(S1); abstracting an acceleration time history signal from the measured signal(S2); filtering the acceleration time history signal and abstracting an acceleration time history signal to the time zone of an interested area(S3); finding a ridge constant through Morlet wavelet transform of the acceleration time history signal of the time zone of the interested area and estimating the natural frequency of the structure by the founded ridge constant(S4); taking a natural logarithm to the magnitude of a wavelet coefficient to the natural frequency and estimating the damping rate of the structure through the gradient of a variable wave form by time(S5); and estimating the vibration mode shape of the structure, making use of a difference of argument to a reference point, and the amplitude ratio from the ratio of the wavelet coefficient magnitude of the identical time(S6).
KR1020030024411A 2003-04-17 2003-04-17 Method for estimating dynamic parameters of structure, making use of morlet wavelet transform KR100394172B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020030024411A KR100394172B1 (en) 2003-04-17 2003-04-17 Method for estimating dynamic parameters of structure, making use of morlet wavelet transform

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Application Number Priority Date Filing Date Title
KR1020030024411A KR100394172B1 (en) 2003-04-17 2003-04-17 Method for estimating dynamic parameters of structure, making use of morlet wavelet transform

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KR100394172B1 true KR100394172B1 (en) 2003-08-09

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101006971B1 (en) 2010-10-19 2011-01-12 성균관대학교산학협력단 Apparatus for estimating strength development of curing concrete by using guided wave and the method thereof
CN104458170A (en) * 2014-11-07 2015-03-25 桂林电子科技大学 Time-frequency diagram processing method and system for mechanical equipment monitoring vibration signals
CN107966205A (en) * 2017-10-20 2018-04-27 哈尔滨工业大学（威海） A kind of underwater target acoustic detection method and device based on coherent laser
CN110441749A (en) * 2019-07-19 2019-11-12 南京信息职业技术学院 Frequency stepping radar target motion parameter estimation method
CN112924154A (en) * 2021-03-09 2021-06-08 中国农业大学 Method and device for extracting damping ratio of structural response signal in high-noise flowing environment
KR20210083775A (en) 2019-12-27 2021-07-07 한국전력공사 Method for predicting dynamic properties under free vibration

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101006971B1 (en) 2010-10-19 2011-01-12 성균관대학교산학협력단 Apparatus for estimating strength development of curing concrete by using guided wave and the method thereof
CN104458170A (en) * 2014-11-07 2015-03-25 桂林电子科技大学 Time-frequency diagram processing method and system for mechanical equipment monitoring vibration signals
CN107966205A (en) * 2017-10-20 2018-04-27 哈尔滨工业大学（威海） A kind of underwater target acoustic detection method and device based on coherent laser
CN110441749A (en) * 2019-07-19 2019-11-12 南京信息职业技术学院 Frequency stepping radar target motion parameter estimation method
CN110441749B (en) * 2019-07-19 2023-09-01 南京信息职业技术学院 Frequency stepping radar target motion parameter estimation method
KR20210083775A (en) 2019-12-27 2021-07-07 한국전력공사 Method for predicting dynamic properties under free vibration
KR102652754B1 (en) 2019-12-27 2024-04-01 한국전력공사 Method for predicting dynamic properties under free vibration
CN112924154A (en) * 2021-03-09 2021-06-08 中国农业大学 Method and device for extracting damping ratio of structural response signal in high-noise flowing environment

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