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

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

【文章頁(yè)數(shù)】：14 頁(yè)

【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(hào)：3378444