国产伦乱,一曲二曲欧美日韩,AV在线不卡免费在线不卡免费,搞91AV视频

當(dāng)前位置:主頁 > 科技論文 > 交通工程論文 >

不均勻積水條件對路面行車安全的影響

發(fā)布時間:2018-10-12 14:50
【摘要】:采用Fluent有限元仿真分析軟件,建立輪胎-路面-流體三維有限元模型,模擬不同水膜厚度和汽車行駛速度條件下汽車輪胎所受動水壓力的理論變化值,定量地分析了水膜厚度和車速對積水路面車輛側(cè)轉(zhuǎn)角的影響以及積水段路面上車輛的橫向穩(wěn)定性能。研究結(jié)果表明:當(dāng)水膜厚度大于胎面花紋深度時,動水壓強(qiáng)隨車速的增大而增加較快,且動水高壓區(qū)由輪胎中間向輪胎邊緣呈近似三角分布。在無駕駛員操控情況下,當(dāng)汽車左右輪分別高速(90 km/h)行駛在干燥和積水路面,水膜厚度介于9~12 mm時,1 s后汽車的相對側(cè)轉(zhuǎn)角差超過最佳控制角度(25°),此時汽車操縱性開始下降;2 s后汽車的相對側(cè)轉(zhuǎn)角差已超過90°,車輛發(fā)生側(cè)滑,易產(chǎn)生交通事故。
[Abstract]:A three-dimensional finite element model of tire, pavement and fluid is established by using Fluent software. The theoretical variation of dynamic water pressure on tire is simulated under different water film thickness and driving speed. The influence of water film thickness and speed on the lateral turning angle of the vehicle and the lateral stability of the vehicle on the waterlogged pavement are analyzed quantitatively. The results show that when the water film thickness is greater than the tread pattern depth, the hydrodynamic pressure increases rapidly with the increase of the speed, and the hydrodynamic high pressure region shows an approximate triangular distribution from the middle of the tire to the tire edge. In the absence of driver control, when the car's left and right wheels are running at a high speed (90 km/h), respectively, on dry and watery roads, When the thickness of water film is between 9 and 12 mm, the relative lateral angle difference of the vehicle exceeds the optimal control angle (25 擄) after 1 s, and the vehicle maneuverability begins to decrease, and the relative lateral angle difference of the vehicle exceeds 90 擄after 2 seconds, which makes the vehicle slip sideways and cause traffic accidents easily.
【作者單位】: 長安大學(xué)特殊地區(qū)公路工程教育部重點實驗室;
【基金】:交通運(yùn)輸部應(yīng)用基礎(chǔ)研究項目(2014319812170) 教育部高等學(xué)校博士學(xué)科點專項科研基金項目(20120205120013) 陜西省自然科學(xué)基金項目(2012JQ7001) 中央高;究蒲袠I(yè)務(wù)費(fèi)專項資金項目(2013G2211005&CHD2011JC048)
【分類號】:U492.84


本文編號:2266539

資料下載
論文發(fā)表

本文鏈接:http://lk138.cn/kejilunwen/jiaotonggongchenglunwen/2266539.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶6302e***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com
久久综合华人精品| 小黄书色人阁亚洲无码| 天天AV中文字幕| 欧美日韩香港澳门午夜在线观看| 一久久精品免费视频| 无码一区erqu| 日批日韩一区二区三区不卡| 无码六区七区| 人妻中出内射少妇| 国产生活综合| 亚洲无码99久| 99人妻xX| 久久综合网亚洲综合网| 国产尤物一区免费| 美女1区黄| 欧美目朝精品一区二区| 阴B视频在线观看| 久久特级性情| 色先锋不卡久久一区| 免费欧美日韩性爱视频| 美女成人黄视频| 色色呦呦视频免费在线观看| 亚洲色图国产精品| 日韩A片一区二区三区在线播放| 婷婷色综合视频在线观看免费阅读| 欧美日韩 一区 美图| 老湿网站欧美| 国产精品野性欧美| 3P视频一区| 日韩美女一区2区| 久久久精品2019中文字幕之| 日夜夜AV一区二区三区| 天堂色噜噜| 欧美视频A| 欧美日韩做了无码| 黄色小说文字视频无码| 精品国产av 无码一区二区三区| 天天逼天天操| 五月色丁香婷视频| 久久久99精品无码一区二区| 少妇后入内射在线观看|