Title:
鉄道橋の変位推定方法
Document Type and Number:
Japanese Patent JP7334138
Kind Code:
B2
Abstract:
To provide a displacement estimation method for railroad bridge capable of targeting a railroad bridge such that it is easy to specify its external force caused by a train, and easily finding a high-precision displacement waveform at low cost from acceleration data.SOLUTION: A displacement estimation method for railroad bridge for estimating displacement occurred on the basis of acceleration data obtained from the railroad bridge on which a train travels comprises: a step S1 of acquiring an acceleration waveform when the train passes through the railroad bridge; steps S11, S12 of acquiring data such as a span length of the railroad bridge, kind information on the train, etc.; steps S13, S14 of using a natural vibration frequency and an attenuation ratio of the railroad bridge to calculate a frequency response function and a dynamic displacement waveform; steps S15, S16 of setting an evaluation section of a frequency region to identify static maximum displacement; and steps S31-S40 of performing replacement with a static displacement waveform based upon linear vibration theory in a correction section to generate a displacement waveform in train passage.SELECTED DRAWING: Figure 1
Inventors:
Munemasa Tokunaga
Application Number:
JP2020129727A
Publication Date:
August 28, 2023
Filing Date:
July 30, 2020
Export Citation:
Assignee:
Railway Technical Research Institute
International Classes:
G01H17/00; E01D1/00; G01M5/00; G01M7/02; G01M99/00
Domestic Patent References:
| JP2015140537A | ||||
| JP2019049095A | ||||
| JP2017067722A | ||||
| JP2016148549A | ||||
| JP2018031676A | ||||
| JP2017003556A |
Foreign References:
| US10351150 | ||||
| CN105241660A |
Attorney, Agent or Firm:
Cleo International Law & Patent Office