Title:
MODE CHARACTERISTICS ESTIMATION METHOD OF BRIDGE AND MODE CHARACTERISTICS ESTIMATION SYSTEM THEREOF
Document Type and Number:
Japanese Patent JP2021098967
Kind Code:
A
Abstract:
To provide a mode characteristics estimation method of bridge capable of precisely estimating mode characteristics of a bridge while separating the vibration components caused by moving bodies that move on the bridge, and a mode characteristics estimation system thereof.SOLUTION: The mode characteristics estimation method is a method of estimating the mode characteristics of bridge B. In a mode characteristic estimation step, vibration components of vibrations of the bridge B caused by a train T are separated from the vibration components of the bridge B based on the vibration waveform of the bridge B when the train T moves on bridge B, and mode characteristics of the bridge B are estimated. In the mode characteristic estimation step, defining the load of the moving train T, which is an external force as an exogenous variable Am, the mode characteristics of the bridge B is estimated by using a hierarchical Bayesian estimation method for time-varying autoregressive (TV-ARX) models with exogenous variables that allow time-varying parameters. In the mode characteristic estimation step, the natural frequency of the bridge B and/or mode fluctuation of the attenuation ratio is estimated.SELECTED DRAWING: Figure 7
Inventors:
MATSUOKA KOTA
Application Number:
JP2019230533A
Publication Date:
July 01, 2021
Filing Date:
December 20, 2019
Export Citation:
Assignee:
RAILWAY TECHNICAL RES INST
International Classes:
E01D21/00; E01D22/00; G01H17/00; G01M5/00; G01M99/00
Attorney, Agent or Firm:
Taketo Okuma