Wake flow elastic support cylinder galloping analysis method considering motion aerodynamic force

An elastic support and aerodynamic technology, applied in the field of simulation analysis, can solve problems such as insufficient induced vibration

Active Publication Date: 2019-03-26
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Other methods using numerical simulation to study the fluid-induced vi

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  • Wake flow elastic support cylinder galloping analysis method considering motion aerodynamic force
  • Wake flow elastic support cylinder galloping analysis method considering motion aerodynamic force
  • Wake flow elastic support cylinder galloping analysis method considering motion aerodynamic force

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[0086] Simpson first predicted the amplitude of the transmission line by the Runge-Kutta method, and used a simple approximate analytical function without considering the aerodynamic damping to conduct a preliminary nonlinear study of the wake galloping vibration. In the 1980s, Allnutt et al. used linear theory to predict the existence of a limit cycle centered on a dynamic equilibrium position, and expressed the limit cycle as a sine function. After that, Price obtained the spatial distribution of the average lift-drag coefficient of the transmission conductor under the wake through the wind tunnel test, and used the quasi-steady method including the aerodynamic high-order term to represent the aerodynamic force of the downstream conductor, and established a wake galloping theoretical model to study Wake gallop.

[0087] The present invention will first simulate the lift-drag coefficient of the downstream cylinder under a specific spacing ratio, and obtain the load of the wir...

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Abstract

The invention discloses an elastic support cylinder galloping analysis method under a tailstream by taking motion aerodynamic force into consideration. The method is clear in concept, correction considering fluid-solid coupling motion is carried out on the basis of obtaining aerodynamic force load models at different fixed positions, the solving method is simple and clear, and wake flow vibrationof a downstream cylinder relative to an upstream cylinder can be effectively solved. The method comprises the steps of S1, simulating a working condition by a three-component force coefficient; S2, carrying out fitting analysis on a lift resistance coefficient; And S3, establishing and solving a wake flow galloping motion differential equation.

Description

technical field [0001] The invention relates to the technical field of simulation analysis, in particular to a galloping analysis method of an elastically supported cylinder under wake flow considering motion aerodynamic force. Background technique [0002] Generally, wind tunnel tests and computational fluid dynamics methods are used in the research on wake galloping of transmission lines. None of these methods require an explicit aerodynamic model of the wake vibration. Simpson predicted the amplitude of the transmission line by the Runge-Kutta method, and conducted a preliminary nonlinear study on wake galloping by using a simple approximate analytical function that does not consider aerodynamic damping. Other methods using numerical simulation to study the fluid-induced vibration of the cylinder under the action of the wake are still not sufficient. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior ar...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02T90/00
Inventor 晏致涛张江滔孙毅刘欣鹏李妍游溢胡伟
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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