Method and system for predicting nonlinear wind-induced response of suspension bridge, and storage medium

A wind-induced response and prediction method technology, applied in special data processing applications, instruments, geometric CAD, etc.

Active Publication Date: 2019-02-19
SHENZHEN UNIV
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Problems solved by technology

However, there is no unified nonlinear unsteady aerodynamic time-domain model that can be widely applied, so the existing technology needs to be further improved

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  • Method and system for predicting nonlinear wind-induced response of suspension bridge, and storage medium
  • Method and system for predicting nonlinear wind-induced response of suspension bridge, and storage medium
  • Method and system for predicting nonlinear wind-induced response of suspension bridge, and storage medium

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[0043] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044] The first embodiment provided by the present invention is: a method for predicting the nonlinear wind-induced response of a suspension bridge, such as figure 1 shown, including:

[0045] Step S1, setting combined parameters of different reduced wind speeds, different vertical amplitudes and different torsional amplitudes of the main girder section of the suspension bridge; and obtaining various nonlinear aerodynamic time histories of the main girder section under different combined parameters.

[0046] In this step, the CFD numerical simulation platform is used to calculate the n...

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Abstract

The invention provides a method and system for predicting the nonlinear wind-induced response of a suspension bridge, and a storage medium. Firstly, the aerodynamic time histories of the girder section under different wind speed and amplitude are numerically simulated by CFD, and then all aerodynamic parameters in the unified nonlinear and unsteady aerodynamic time domain model are identified by nonlinear least square fitting method, and the results are compared with the CFD results. Then the unified aerodynamic model is coupled with the three-dimensional nonlinear finite element model of thebridge to predict the nonlinear wind-induced response of the bridge in the process of the wind speed increasing from zero to the preset limit wind speed. The unified aerodynamic time domain model of the present invention includes static wind, The mathematical expressions of self-exciting force, buffeting force, vertical vortex force and torsional vortex force and their corresponding parameters canbe used to accurately predict the nonlinear wind-induced response of bridges in different wind speed ranges, which provides important reference for the evaluation of wind-resistant performance of suspension bridges during the passage of strong/typhoon.

Description

technical field [0001] The invention relates to the technical field of bridge wind resistance and control, in particular to a prediction method, system and storage medium for the nonlinear wind-induced response of a suspension bridge during a strong / typhoon process. Background technique [0002] With the development of modern social economy, transportation and engineering technology, bridge construction tends to be longer, higher and lighter. Suspension bridges are more sensitive to wind due to their softer structure and reduced damping. The vibration problem is becoming more and more prominent, so that the wind load is usually the main control load in the design of the suspension bridge, and the safety performance and serviceability of the suspension bridge structure under the wind load have become an important issue that people pay close attention to. At the same time, my country is one of the few countries in the world most severely affected by wind disasters. In recent y...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F2119/06G06F30/20Y02T90/00
Inventor 周锐杨詠昕葛耀君杜彦良
Owner SHENZHEN UNIV
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