Method for identifying modal frequency of beam bridge by considering influence of environmental temperature
US11680848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2022 |
| Grant date | Jun 20, 2023 |
| Priority date | — |
| Expiry date | Jul 29, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The disclosure provides a method for identifying a modal frequency of a beam bridge by considering influence of environmental temperature. The method includes the following steps: installing a sensor on a newly-built beam bridge without damage, measuring a dynamic response of the beam bridge cinder ambient excitation, recording temperature data, processing by a modal parameter identification method to obtain a modal frequency value at the temperature, and starting from a modal frequency corresponding to the temperature, carrying out iterative calculation to obtain the modal frequency at any temperature. The modal frequency value at any temperature is obtained by arranging a small number of sensors and carrying out a small number of tests, so that the influence of the temperature on the modal frequency is quantified, furthermore, the part of environmental influence is eliminated in future damage evaluation of the beam bridge, which allows for a more accurate damage evaluation result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.