A Method for Determining Equivalent Wind Speed Ratio of Wind Profile of Typical Railway Foundation Structure
A basic structure and equivalent wind speed technology, applied in complex mathematical operations, geometric CAD, design optimization/simulation, etc., can solve the problem of low accuracy of wind profile evaluation of typical basic structures
Active Publication Date: 2021-11-02
SOUTHWEST JIAOTONG UNIV
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for determining the equivalent wind speed ratio of the wind profile of a typical railway infrastructure, which solves the problem of low accuracy in evaluating the wind profile of a typical infrastructure in the prior art
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0048] Such as figure 1 As shown, the present invention provides a method for determining the equivalent wind speed ratio of a typical railway infrastructure wind profile, and its implementation method is as follows:
[0049] S1. Construct a typical railway infrastructure model, and its implementation method is as follows:
[0050] S101, setting a segment model with a fixed geometric scale ratio according to the wind tunnel blocking ratio;
[0051] S102, respectively setting boundary conditions, measuring point locations, and test conditions for the segment model, and constructing a typical railway infrastructure model;
[0052] S2. Using the typical railway infrastructure model, synchronously collect the incoming wind speed and the wind speed at the measuring point above the typical railway infrastructure structure. The implementation method is as follows:
[0053] S201, arranging the typical railway infrastructure model at the position of the measuring point, and setting t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for determining the equivalent wind speed ratio of a wind profile of a typical railway foundation structure, and belongs to the technical field of wind tunnel tests. First, construct a typical railway infrastructure model; synchronously collect incoming wind speed and wind speed at the measuring points above the typical railway infrastructure; analyze the wind field information of the typical railway infrastructure model under the action of multiple wind speeds based on the principle of least squares, and determine the wind speed ratio of the measuring points Estimated value; the coefficient of variation is introduced to evaluate the estimated value of the wind speed ratio at different measuring point heights, and the wind profile of the typical railway infrastructure is determined; based on the wind profile, the equivalent wind speed ratio of the typical railway infrastructure is determined. Through the above design, the present invention increases the evaluation accuracy of wind profile of typical railway infrastructure, improves the reliability of structure design and traffic safety evaluation, and solves the problem of low evaluation accuracy of wind profile of typical railway infrastructure in the prior art.
Description
technical field [0001] The invention belongs to the technical field of wind tunnel tests, in particular to a method for determining the equivalent wind speed ratio of a typical railway infrastructure wind profile. Background technique [0002] With the increase of train speed and the light weight of vehicles, the dynamic environment of train operation has changed from wheel-rail interaction to aerodynamics, and the dynamic response of high-speed trains in the lateral wind environment has become A key mechanical issue in the design process, strong wind has become a controlling factor for the safe operation of high-speed railways in my country. [0003] Under the action of strong winds, various types of infrastructure structure have different performances on the high-speed trains on the bridge. Usually, setting up wind barriers along the line can create a relatively low-speed local operating environment for the train, thereby effectively improving the safety of the train. At th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/28G06F17/18
CPCG06F17/18G06F30/13G06F30/28
Inventor 李小珍邱晓为郑净谭懿玲李星星
Owner SOUTHWEST JIAOTONG UNIV