Bridge station structure natural vibration characteristic testing method based on grouped spring oscillators

Abstract

The invention provides a bridge station structure natural vibration characteristic testing method based on the grouped spring oscillators. The natural vibration characteristic of any position of the structure can be visually and simply monitored, and then the overall natural vibration frequency of a bridge station is obtained. The bridge station structure natural vibration characteristic testing method provided by the invention is characterized by comprising the following steps: step 1, groups of spring oscillators with different natural vibration frequencies are arranged on test points of different structure parts of a bridge station; 2, after a train leaves the bridge station, the bridge station structure vibrates freely, the grouped spring vibrators are forced to vibrate under the influence of natural vibration of the bridge station, and the vibration condition of each spring vibrator is accurately captured through a high-speed camera; 3, according to the obtained vibration condition of each spring oscillator, the forced vibration frequency of the spring oscillator group is calculated, wherien the forced vibration frequency is the natural vibration frequency of the corresponding measuring point; and step 4, the natural vibration frequency of the bridge station overall structure is obtained according to the natural vibration frequency of each measuring point.

Description

technical field [0001] The invention belongs to the field of structural safety monitoring, in particular to a method for testing the natural vibration characteristics of a bridge station structure based on grouped spring vibrators. Background technique [0002] With the spread of the country's large-scale infrastructure construction, different cities have begun to construct high-speed rail stations, railway stations, and subway stations. It is very important to monitor the natural vibration characteristics of the bridge station structure, which is directly related to the dynamic response of the bridge station, the structural safety and the comfort of the people in the station. [0003] At present, vibration frequency monitoring equipment mostly relies on electronic equipment, which needs to carry complex electronic sensors, which are bulky and have high requirements for power supply and strict environmental conditions, and the acquisition of frequency is not intuitive enough...

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Problems solved by technology

[0003] At present, vibration frequency monitoring equipment mostly relies on electronic equipment, which needs to carry complex electronic sensors, which are bulky and have high requirements for power supply and strict environmental conditions, and the acquisition of frequency is not intuitive enough, so it cannot Make adjustments now

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