發(fā)布時間：2021-09-02 05:53

　　基于縮尺比為1:25的節(jié)段模型風洞試驗,對湍流橫風中高架橋上高速列車的氣動特性進行研究。在均勻流和湍流條件下,對-6°至6°風攻角范圍內(nèi)迎風和背風軌道上的典型車頭和車身斷面進行測壓試驗,并采用積分法計算相應(yīng)的氣動力系數(shù)。實驗結(jié)果表明,軌道位置對高速列車的平均氣動特性有影響,特別是對車身斷面的平均氣動特性。與迎風軌道處相比,背風軌道處的脈動壓力受橋梁干擾影響明顯。湍流對車頭斷面的影響小于其對車身斷面的影響。列車車頭平均氣動力系數(shù)與風攻角幾乎呈負相關(guān),背風軌道上的車頭斷面尤其如此。此外,側(cè)向力在決定相應(yīng)的列車頭車傾覆力矩時起著關(guān)鍵作用,尤其是對車身截面。 

【文章來源】：Journal of Central South University. 2020,27(08)EISCICSCD

【文章頁數(shù)】：14 頁

【文章目錄】：
1 Introduction
2 Experimental setup
    2.1 Measurement system
    2.2 Wind flow characteristic
3 Results and discussion
    3.1 Wind pressure coefficient
    3.2 Mean aerodynamic coefficient of vehicle section
    3.3 Contribution of each part to mean aerodynamic force coefficient
4 Results and discussion
    4.1 Mean pressure coefficient of HST
    4.2 Fluctuating pressure coefficient of HST
    4.3 Mean aerodynamic force coefficient of HST
    4.4 Contribution of each part to mean train-head force coefficient
    4.5 Contribution of each part to mean train-body force coefficient
5 Conclusions



本文編號：3378444