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Method for calculating wind load and system thereof

A technology of wind load and calculation results, which is applied in calculation, computer-aided design, complex mathematical operations, etc., can solve the problems of large fluctuation range of wind load, high frequency of occurrence, and low frequency of occurrence, so as to achieve reliable and reasonable structural design and improve operation The effect of longevity

Pending Publication Date: 2019-09-06
STATE GRID FUJIAN ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the important condition of statistical independence of extreme value samples cannot be guaranteed if the cycle is one day
Therefore, there are limitations in designing with a single wind speed
[0008] The fluctuation range of wind load is large and the frequency of occurrence is high, and the destructive activity of earthquake is stronger but its frequency of occurrence is low

Method used

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  • Method for calculating wind load and system thereof
  • Method for calculating wind load and system thereof
  • Method for calculating wind load and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] There are certain differences in climatic conditions in different regions. There may be multiple storms within a year, and the number of occurrences in coastal areas may be more obvious. Therefore, the method of selecting only the maximum wind speed as the sample for extreme value analysis has great limitations. If a period shorter than a year is used to increase the sample size, this may violate the independent statistical nature of extreme value analysis data. For example, taking the period as one day cannot guarantee the important condition of the statistical independence of extreme samples. The "surpass value method" is a method that only uses data related to extreme value prediction. All wind speeds it uses come from relatively independent storms, and they are all higher than a specific minimum critical wind speed v 0 There may be multiple or none of this wind speed in a year. This method provides a new idea for solving the above limitations. Different wind speed...

Embodiment 2

[0107] Table 1-1 Summary of data for each station in the coastal area

[0108]

[0109] According to the introduction and design ideas of the above method, the simulation application of this method is carried out in coastal areas of China. The coastal areas of China, close to the Tropic of Cancer, have a typical subtropical maritime monsoon climate. The climate is characterized by high temperature and dry climate, no severe cold, little summer heat, and abundant water resources. Due to the geographical environment and climate, there are frequent disasters in this area, and wind disasters such as typhoons often occur. In the southeastern coastal areas of China, the maximum wind speed generally occurs in two ways: climatic wind and typhoon passing. Since 1950, 4 different stations along the southeast coast of China have independently recorded the size of daily wind gusts, which are recorded as stations 1, 2, 3, and 4. The anemometers at these four sites are all placed in open ar...

Embodiment 3

[0136] Based on the same inventive concept, the present invention also provides a system for calculating wind load, characterized in that the system includes:

[0137] Type module: used to determine the type of wind speed in the area based on the wind speed data of the predicted wind speed area;

[0138] Determining module: used to determine the extreme wind speed based on the wind speed type and wind speed data;

[0139] Calculation module: used to calculate wind load at any height based on the extreme wind speed;

[0140] The wind speed types include: climate wind and typhoon.

[0141] The type module includes: an acquisition unit, a comparison unit, and a determination unit;

[0142] The acquiring unit is configured to acquire wind speed data in the predicted wind speed area;

[0143] The comparison unit is configured to compare the weather chart of the day corresponding to the wind speed data with the wind speed data;

[0144] The determining unit is configured to determine the wind sp...

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Abstract

The invention discloses a method for calculating wind load and a system thereof. The method includes the steps: determining the wind speed type of a wind speed area based on wind speed data of the wind speed area; determining an extreme value wind speed based on the wind speed type and the wind speed data; calculating a wind load at any height based on the extreme value wind speed; and carrying out extreme value prediction on different wind speed types, wind loads in different regions. Therefore, the method can calculate the wind load at different positions and at different heights more accurately, enables the structural design to be more reliable and reasonable, can provide suggestions for the material and construction of the structure, and can prolong the service life of the design.

Description

Technical field [0001] The invention relates to the field of wind load calculation and structural design, and in particular to a method and system for calculating wind load. Background technique [0002] In the 1930s, people used the symmetric bell-shaped Gaussian distribution to predict extreme wind speed. This method is based on the tail of the parent distribution to establish the limit model of the maximum (or minimum) value probability distribution of a given sample, which is in contrast to Fisher and Tippett’s early The research is quite different. The discovery of the three types of extreme value distribution laws also greatly promoted the development of general engineering probability methods. Jenkinson believes that the three extreme value distributions proposed by Fisher and Tippett can be expressed by a unified generalized extreme value distribution. Gumbel strongly recommends the relatively simple extreme value I-type distribution for relevant analysis. [0003] In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/18
CPCG06F17/18G06F30/13G06F30/20
Inventor 林德元周刚韩纪层王飞杨风利韩军科张宏杰黄国汪长智洪毅成蔡建宾夏晓健严康骅
Owner STATE GRID FUJIAN ELECTRIC POWER RES INST