High speed railway bridge vehicle-bridge vibration performance safety early warning method
A technology for high-speed railway and safety early warning, which is applied in the field of safety early warning of vehicle-bridge vibration performance of high-speed railway bridges, and in the field of safety early warning of vibration performance of high-speed railway bridges during service. Practitioners understand and cannot be popularized and applied, etc., to achieve the effect of being easy to popularize and apply, with few experience factors, and accurate and reasonable early warning methods
A technology for high-speed railway and safety early warning, which is applied in the field of safety early warning of vehicle-bridge vibration performance of high-speed railway bridges, and in the field of safety early warning of vibration performance of high-speed railway bridges during service. Practitioners understand and cannot be popularized and applied, etc., to achieve the effect of being easy to popularize and apply, with few experience factors, and accurate and reasonable early warning methods
CN106568557AActive Publication Date: 2017-04-19SOUTHEAST UNIV
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[0034] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
[0035] Such as figure 1 As shown, the embodiment of the present invention discloses a safety early warning method for the vehicle-bridge vibration performance of a high-speed railway bridge, which mainly includes the following steps:
[0036] Step 10): Collect bridge vibration acceleration and train speed data, and establish acceleration-vehicle speed correlation:
[0037] Acceleration sensors and radar speedometers are installed in the main beam span of high-speed railway bridges. Whenever a train passes by, the acceleration response time history of the main beam of the bridge and the instant speed of the passing train are collected. Take the maximum value of the acceleration response amplitude and the corresponding vehicle speed data of each train passing within a certain period of time (such as one year), and obtain two sets of monitoring ...
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The invention discloses a high speed railway bridge vehicle-bridge vibration performance safety early warning method. The method includes acquiring the maximum value of the acceleration response amplitude for each passing train and the corresponding vehicle speed data, pairing the corresponding elements of two sets of sequences, and making an arrangement according to the vehicle sped; decomposing the acceleration response amplitude sequences of a main beam by means of wavelet packet decomposition, extracting the acceleration-vehicle speed median line, and determining the optimal wavelet packet decomposition parameters according to the matching degree of the acceleration amplitude mean of the acceleration sequence within the fixed sequence length; acquiring the fluctuation interval, surrounding the acceleration-vehicle speed median line, of the acceleration amplitude in each subsequence based on an interval estimation theory; and superimposing the acceleration fluctuation interval and the acceleration-vehicle speed median line to obtain the safety early warning interval of the high speed railway bridge vehicle-bridge vibration performance. Compared with the prior art, the method provided has the advantages of comprehensive consideration of factors, accurate and reasonable way, clear physical meaning, easy understanding and implementation, and wide application.
Description
technical field [0001] The invention belongs to the field of structural performance analysis and early warning of high-speed railway bridges, and relates to a safety early warning method for vehicle-bridge vibration performance of high-speed railway bridges, and specifically relates to a safety early warning method for vibration performance of high-speed railway bridges during service. Background technique [0002] High-speed railway bridges are key projects on China's high-speed railway trunk lines. The maximum speed of high-speed trains operating in my country has reached 350km / h. High-speed trains are the main source of excitation during the operation of bridges. focus on. The bridge structure health monitoring system is widely used in the performance monitoring of bridge structures. In order to ensure the normal service of the bridge structure and the driving safety of high-speed trains, my country's high-speed railway bridges are also equipped with structural health moni...
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Patent Timeline
19 Apr 2017
Publication
CN106568557A
- IPC
- G01M5/00
- CPC
- G01M5/0008; G01M5/0066
- Inventors
- 赵瀚玮; 丁幼亮