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Prediction method, system and storage medium for nonlinear wind-induced response of a suspension bridge

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

Active Publication Date: 2022-07-12
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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  • Prediction method, system and storage medium for nonlinear wind-induced response of a suspension bridge
  • Prediction method, system and storage medium for nonlinear wind-induced response of a suspension bridge
  • Prediction method, system and storage medium for nonlinear wind-induced response of a suspension bridge

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[0043] In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, 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 herein are only used to explain the present invention, but 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 the combined parameters of different reduced wind speeds, different vertical amplitudes and different torsional amplitudes of the main girder section of the suspension bridge; and acquiring various nonlinear aerodynamic time histories of the main girder section under different said combined parameters.

[0046] In this step, the CFD numerical simulation platform is used t...

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Abstract

The invention provides a method, system and storage medium for predicting the nonlinear wind-induced response of a suspension bridge. Firstly, CFD numerically simulates various aerodynamic time histories of the main beam section under different combinations of reduced wind speeds and amplitudes, and then uses the nonlinear minimum The square fitting method identifies all the aerodynamic parameters in the unified nonlinear unsteady aerodynamic time-domain model, and compares them with the CFD calculation results for verification; then the unified aerodynamic model is compared with the three-dimensional nonlinear finite element model of the bridge The coupled solution predicts the nonlinear wind-induced response of the bridge when the wind speed increases from zero to a preset limit wind speed. The unified aerodynamic time-domain model of the present invention includes mathematical expressions of static wind force, self-excited force, buffeting force, vertical vortex force and torsional vortex force and their corresponding parameters, and realizes bridges in different wind speed ranges. The accurate prediction of nonlinear wind-induced response provides an important reference for the evaluation of the wind resistance performance of suspension bridges during strong / typhoon experiences.

Description

technical field [0001] The invention relates to the technical field of bridge wind resistance and control, in particular to a method, system and storage medium for predicting the nonlinear wind-induced response of a suspension bridge during a strong / typhoon passing process. Background technique [0002] With the development of modern social economy, transportation and engineering technology, bridge construction is developing towards a longer, higher and lighter trend. As the structure of suspension bridge tends to be softer, the damping is reduced, and it is more sensitive to the effect of wind. Vibration problems are becoming more and more prominent, so that wind load is usually the main control load in the design of suspension bridges. The safety performance and service performance of suspension bridge structures under the action of wind loads have become an important issue that people are extremely concerned about. At the same time, my country is one of the few countries ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20G06F119/14
CPCG06F30/13G06F2119/06G06F30/20Y02T90/00
Inventor 周锐杨詠昕葛耀君杜彦良
Owner SHENZHEN UNIV
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