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Two-dimensional wind-induced vibration coefficient calculation method for ultra-standard oversized cooling tower

A technology of wind vibration coefficient and calculation method, applied in the field of cooling towers, can solve the problem of lack of parameter clauses for the value of wind vibration coefficient of super-large cooling towers

Inactive Publication Date: 2016-12-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, the current code lacks the parameter clauses for the wind-induced vibration coefficient of such super-large cooling towers, and there are few data and research results for the design wind load at home and abroad for reference.

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  • Two-dimensional wind-induced vibration coefficient calculation method for ultra-standard oversized cooling tower
  • Two-dimensional wind-induced vibration coefficient calculation method for ultra-standard oversized cooling tower
  • Two-dimensional wind-induced vibration coefficient calculation method for ultra-standard oversized cooling tower

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[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] Unless the context clearly states otherwise, the number of elements and components in the present invention can exist in a single form or in multiple forms, and the present invention is not limited thereto. Although the steps in the present invention are arranged with labels, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted. It can be understood that the term "and / or" used herein refers to and covers any and all possible combina...

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Abstract

The invention provides a two-dimensional wind-induced vibration coefficient calculation method for an ultra-standard oversized cooling tower. The method comprises the steps of a, building a geometric model, wherein the full-size geometric model of the cooling tower and a computational domain of a flow field where the cooling tower is located are built based on the actual size of the cooling tower; b, mesh generation, wherein the computational domain is divided into grids by means of the local cipher technique; c, numerical simulation computation, wherein a turbulence model is selected, boundary conditions are set, and numerical wind tunnel simulation analysis is conducted to obtain tower tube outer surface wind pressure time interval; d, solving wind-induced response, wherein a finite element model of the cooling tower is built, and wind-induced dynamic response of the cooling tower is analyzed; e, computing a wind-induced vibration coefficient, wherein the tower tube two-dimensional wind-induced vibration coefficient is computed based on structural response time interval; f, analysis fitting, wherein fitting of the tower tube wind-induced vibration coefficient is conducted based on a nonlinear least square principle, and finally a two-dimensional wind-induced vibration coefficient fitting formula is provided.

Description

technical field [0001] The invention belongs to the technical field of cooling towers, and in particular relates to a two-dimensional wind vibration coefficient calculation method suitable for ultra-standard extra-large cooling towers. Background technique [0002] With the rapid development of my country's thermal / nuclear power industry, a series of super-large cooling towers have been built one after another, and the problem of wind-induced vibration has attracted more and more attention. A 200m-high extra-large cooling tower under construction in my country not only breaks through the current "Hydraulic Design Code for Thermal Power Plants" (DL / T5339-2006) tower height of 165m and "Industrial Circulating Water Cooling Design Code" (GB / T50102-2014) The tower height is limited to 190m, and compared with conventional height cooling towers, it has greater flexibility, smaller damping, extremely low natural vibration frequency and dense distribution, and the structural wind vib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23G06F2119/06
Inventor 柯世堂余文林杜凌云王浩朱鹏余玮徐璐
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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