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Method for calculating vehicle induced vibration response of railway bridge structure

A technology of bridge structure and calculation method, applied in the direction of calculation, special data processing applications, instruments, etc., can solve problems such as the inability to comprehensively reflect the vibration characteristics of bridge structures, the randomness of irregularity, and the low calculation efficiency.

Inactive Publication Date: 2014-06-11
李小珍 +2
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Problems solved by technology

However, it is uncertain how many times different bridge structures need to calculate the sample values ​​to obtain stable statistical characteristics, and it needs a lot of trial calculations to determine. Therefore, although it is feasible to use the Monte Carlo method, the disadvantage of low calculation efficiency is cannot be ignored
[0003] The results obtained by conventional bridge structure dynamic analysis and dynamic detection ignore the randomness of unevenness, so the analysis results and detection results obtained are only sample values ​​of a certain time or several times, which cannot comprehensively reflect the bridge structure due to Vibration characteristics caused by vehicle vibration

Method used

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  • Method for calculating vehicle induced vibration response of railway bridge structure
  • Method for calculating vehicle induced vibration response of railway bridge structure
  • Method for calculating vehicle induced vibration response of railway bridge structure

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Embodiment Construction

[0035] Below in conjunction with embodiment the present invention is further described.

[0036] This embodiment adopts the solution process of the mid-span dynamic displacement of the structure when the German ICE3 bullet train passes through a single-span 32-meter high-speed railway simply supported beam.

[0037] 1. Using finite element software to establish a finite element model of a single-span 32-meter high-speed railway simply supported beam, in which the beam and pier are simulated by beam elements, and the boundary conditions at the bottom of the pier are all consolidated, that is, linear displacement in three directions and three-dimensional The angular displacement in each direction is zero. The beam-pier connection, that is, the support is simulated through the connection of the master-slave node. The type of the support is realized by setting the boundary conditions of the master-slave node connection. The boundary conditions for the linear displacement and torsi...

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Abstract

The invention discloses a method for calculating the vehicle induced vibration response of a railway bridge structure, and belongs to the technical field of engineering design calculation. According to the method, a stochastic problem in a field domain is converted into a definite solving mode on the time domain on the basis of a pseudo excitation method; the time-varying characteristics of a vehicle-bridge coupling system and the irregularity of a track as the self-excitation indeterminacy of a system are considered, and the obtained vehicle induced vibration response of the railway bridge structure is within a range interval; the range interval can compromise multiple stress states of the railway bridge structure, so that the accuracy of a calculating result is ensured, and the structural safety is enhanced.

Description

technical field [0001] The invention relates to the structural design of railway bridges, in particular to the calculation of bridge vibration responses, and belongs to the technical field of engineering design calculations. Background technique [0002] At present, the calculation of the vehicle-induced response of bridge structures is an important task in the design of bridge structures. Track / road surface irregularity is the self-excited excitation source of the system, which is essentially a random process about the mileage. However, the results obtained by the current bridge structure dynamic analysis and dynamic detection ignore the randomness of the irregularity, so the analysis results obtained And the test results are only sample values ​​of a certain time or several times, which cannot comprehensively reflect the vibration characteristics of the bridge structure caused by vehicle vibration. When a vehicle passes through a bridge, the running vehicle and the bridge...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李小珍朱艳雷虎军李闻秋祁锦冀肖林
Owner 李小珍
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