京滬高鐵沿線風(fēng)場(chǎng)非平穩(wěn)特性分析：以江蘇段為例

doi:10.12306/2023jms.0051

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京滬高鐵沿線風(fēng)場(chǎng)非平穩(wěn)特性分析：以江蘇段為例
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                        10.12306/2023jms.0051
                    
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中圖分類號(hào):P425.6
基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目(42275156);國(guó)家自然科學(xué)基金青年科學(xué)資助項(xiàng)目(42205150);江蘇省自然科學(xué)青年基金資助項(xiàng)目(BK20210661)

Analysis of non-stationary characteristics of wind field along the Beijing-Shanghai high-speed railway line: Taking Jiangsu section as an example

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摘要:

大風(fēng)是影響高鐵行車(chē)安全的主要?dú)庀笠蛩刂唬哞F對(duì)局地瞬時(shí)風(fēng)速敏感，本文研究其沿線風(fēng)環(huán)境特性，揭示風(fēng)速變化特征，為沿線大風(fēng)預(yù)測(cè)預(yù)警提供理論支撐。選取京滬高鐵江蘇段4個(gè)典型區(qū)域氣象站風(fēng)速監(jiān)測(cè)數(shù)據(jù)，運(yùn)用統(tǒng)計(jì)學(xué)方法和非線性系統(tǒng)理論研究不同時(shí)距下的風(fēng)特性。揭示了沿線風(fēng)場(chǎng)特性變化規(guī)律，研究結(jié)果表明：脈動(dòng)風(fēng)速波動(dòng)幅度隨時(shí)距增大間歇增大，間歇點(diǎn)出現(xiàn)在5 min時(shí)距；脈動(dòng)強(qiáng)度與平均風(fēng)速之間呈正相關(guān)變化，這種變化關(guān)系隨時(shí)距增大愈發(fā)明顯；陣風(fēng)因子和湍流強(qiáng)度具有明顯局地差異性，都隨平均風(fēng)速的增大而減小，近似呈現(xiàn)冪函數(shù)衰減變化規(guī)律；不同時(shí)距風(fēng)速的概率分布特性存在很小的差異，局地差異性顯著；不同時(shí)距風(fēng)速的最大李亞普諾夫指數(shù)均為正，均具有可預(yù)測(cè)性，且可預(yù)測(cè)性隨時(shí)距的增大而減弱。在進(jìn)行沿線風(fēng)速預(yù)測(cè)建模時(shí)，選取20 s、30 s、1 min、2 min、5 min、10 min時(shí)距的風(fēng)速理論上可以取得較為準(zhǔn)確的預(yù)測(cè)結(jié)果。

Abstract:

Strong wind is one of the main meteorological factors affecting the safety of high-speed rail. High speed railway is sensitive to local instantaneous wind speeds， and study the characteristics of the wind environment along the line to reveal the characteristics of wind speed changes， providing theoretical support for the prediction and early warning of strong winds along the line. Select the wind speed monitoring data of four typical regional meteorological stations in Jiangsu section of the Beijing-Shanghai high-speed railway， and use statistical methods and nonlinear system theory to study wind characteristics at different time intervals. The study revealed the variation pattern of wind field characteristics along the line， and the results showed that the fluctuation amplitude of fluctuating wind speed increases intermittently at any time interval， with intermittency occurring at a time interval of 5 minutes. There is a positive correlation between the intensity of pulsation and the average wind speed， and this relationship becomes increasingly evident as the distance increases. The gust factor and turbulence intensity have obvious local differences， both of which decrease with the increase of the average wind speed， and approximately present a law of power function attenuation. There are small differences in the probability distribution characteristics of wind speed at different time intervals， and the local differences are significant. The maximum Lyapunov exponents of wind speeds at different time intervals are all positive and predictable， and the predictability decreases with the increase of distance. When carrying out wind speed prediction modeling along the line， selecting wind speeds with time intervals of 20 s， 30 s， 1 min， 2 min， 5 min， and 10 min can theoretically obtain more accurate prediction results.

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葉小嶺,張永勝,陳昕,張穎超,熊雄.京滬高鐵沿線風(fēng)場(chǎng)非平穩(wěn)特性分析：以江蘇段為例.氣象科學(xué),2025,45(4):592-602 YE Xiaoling, ZHANG Yongsheng, CHEN Xin, ZHANG Yingchao, XIONG Xiong. Analysis of non-stationary characteristics of wind field along the Beijing-Shanghai high-speed railway line: Taking Jiangsu section as an example. Journal of the Meteorological Sciences,2025,45(4):592-602

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收稿日期:2023-04-26
最后修改日期:2023-07-18
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在線發(fā)布日期: 2025-11-29
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