Simulation and safety early warning method for mountain fire induced steel structure tower structure failure

A safety warning, steel structure technology, applied in design optimization/simulation, resources, instruments, etc., to ensure reliable and stable operation

Active Publication Date: 2019-03-19
NANJING UNIV OF TECH
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Problems solved by technology

[0005] However, as far as the domestic and foreign research on high-voltage transmission line mountain fires is concerned, most of them still focus on the analysis of the environment for the formation of mountain fires, and the research on the fire-resistant design and fire-resistant characteristics of high-voltage transmission line steel structure towers is still blank.

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  • Simulation and safety early warning method for mountain fire induced steel structure tower structure failure
  • Simulation and safety early warning method for mountain fire induced steel structure tower structure failure
  • Simulation and safety early warning method for mountain fire induced steel structure tower structure failure

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Embodiment Construction

[0026] The simulation and safety warning method for the structural failure of steel structure towers induced by wildfires includes the following steps:

[0027] (1) Establishment of 3D CAD drawing model and feature database;

[0028] (2) Distributed non-contact sensor data return;

[0029] (3) Analysis of the fire-heated flow field structure of high-voltage transmission tower components and the metal surface temperature field of the rods;

[0030] (4) Establishment of failure criteria for tower structural components and fire-resistant early warning system;

[0031] (5) Fire-induced steel structure tower structure failure simulation experiment;

[0032] (6) Draw the temperature-stress-strain dual-parameter coupling curve model;

[0033] (7) Establishment of early warning procedures for the failure of steel structures caused by wildfires.

[0034] The step (1) establishment of 3D CAD drawing model and feature database, including:

[0035] 1) Establish a three-dimensional CA...

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Abstract

The invention relates to a simulation and safety early warning method for mountain fire induced steel structure tower structure failure. Based on a distributed non-contact sensor, a multi-antenna diversity into receiving mode and a remote server, the time-varying space temperature field of mountain fire is analyzed by Fluent; structural fire resistance inspection is carried out by using nonlinearfinite element analysis tools such as ANSYS/ABAQUS/COMSOL; and the two models are coupled, dynamic simulation, threshold comparison and image fitting are carried out, and a theoretical calculation, nonlinear finite element simulation and data analysis model for steel structure tower fire resistance characteristic and gradual change stress loss, stress deformation and collapse danger level judgmentis established. The method has the advantages that guidance is provided for planning, design and operation maintenance of power transmission line steel structure towers with various tower shapes andvarious voltage grades, and safe operation and structure failure early warning of the steel structure towers and an intelligent power grid are achieved.

Description

technical field [0001] The invention relates to a simulation and safety early warning method for structural failure of a steel structure pole tower induced by mountain fire, and belongs to the technical field of simulation prediction of mountain fire prevention and control. Background technique [0002] Transmission lines are the lifeblood of smart grid operation. At present, one of the main methods of power transmission at home and abroad is to use high-altitude overhead transmission lines, and transmission line towers are an indispensable and important infrastructure for smart grids. In recent years, due to the rapid development of my country's power grid construction, more and more transmission lines pass through densely vegetated mountainous areas, and high-voltage transmission line towers are usually laid on the top of the mountain following the direction of the line. However, in this case, the occurrence and development of wildfires is inevitable, which poses a long-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06G06F17/50
CPCG06Q10/0635G06Q50/06G06F30/23G06F2119/08Y04S10/50
Inventor 尤飞杨鹏徐厚才周俊辉王胜
Owner NANJING UNIV OF TECH
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