Railway bridge finished bridge line shape evaluation method based on train driving performance
An evaluation method and alignment technology, applied in sustainable transportation, design optimization/simulation, geometric CAD, etc., can solve problems such as evaluation of long-span bridge alignment compliance, and achieve accurate and reasonable evaluation
Active Publication Date: 2022-04-12
SOUTHWEST JIAOTONG UNIV
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[0005] The purpose of the present invention is to solve the problem that the existing technology cannot reasonably and accurately evaluate whether the alignment of long-span bridges is compliant, and proposes a method for evaluating the alignment of railway bridges based on train driving performance.
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0026] This application proposes a method for evaluating the bridge alignment of railway bridges based on train driving performance, such as figure 1 Shown as its flowchart, the method includes the following steps:
[0027] Step S1. Obtain the bridge alignment of the bridge.
[0028] Specifically, through the high-precision control network and displacement sensors, the absolute elevation of the bridge along the line mileage can be measured, so as to measure the bridge alignment of the long...
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The invention discloses a railway bridge finished bridge line shape evaluation method based on train driving performance. The railway bridge finished bridge line shape evaluation method comprises the steps of firstly obtaining a finished bridge line shape of a bridge; based on the Fourier series and constraint conditions formed by the railway ballast laying thickness, fitting the bridge forming line shape to obtain a fitting curve, determining a vehicle body vibration acceleration sensitive wavelength, and obtaining the wavelength and the amplitude of the fitting curve; then determining predicted vehicle body vibration acceleration and predicted vehicle body centrifugal acceleration according to the vehicle body vibration acceleration sensitive wavelength and the wavelength and amplitude of the fitted curve; determining an overall acceleration response based on the predicted vehicle body vibration acceleration and the vehicle body centrifugal acceleration; if the total acceleration response exceeds a specified response limit value, the finished bridge line shape does not meet the line smoothness requirement, and if the total acceleration response does not exceed the specified response limit value, the finished bridge line shape meets the line smoothness requirement, so that the finished bridge line shape of the large-span bridge is accurately and reasonably evaluated.
Description
technical field [0001] The invention belongs to the technical field of bridge formation alignment evaluation, and in particular relates to a railway bridge formation alignment evaluation method based on train running performance. Background technique [0002] In order to meet the development needs of my country's economic construction, high-speed railway bridges have developed to larger spans and more complex structural forms. In recent years, my country has planned many road-rail bridges with a main span of over 1,000 meters. [0003] Long-span railway bridges have the characteristics of huge engineering scale, complex system, light structure and large displacement. During the construction process, they are usually affected by factors such as steel girder manufacturing errors and construction errors. The alignment of the completed bridge often deviates from the design alignment. These deviations are allowed within a certain range, but beyond a certain range, they are not in...
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IPC IPC(8): G06F30/13G06F30/20
CPCY02T90/00
Inventor 王铭王平李小珍陈嵘陆粤舒英杰禹壮壮王心怡阳川周彦希
Owner SOUTHWEST JIAOTONG UNIV