本文選題：山區(qū)風(fēng) + 現(xiàn)場(chǎng)實(shí)測(cè)�。� 參考：《西南交通大學(xué)學(xué)報(bào)》2016年02期

【摘要】：為了獲取偏遠(yuǎn)山區(qū)的風(fēng)場(chǎng)特性,以普立特大橋橋位處風(fēng)場(chǎng)實(shí)測(cè)項(xiàng)目為研究背景,開(kāi)發(fā)了基于無(wú)線傳輸?shù)母哳l風(fēng)速儀數(shù)據(jù)采集系統(tǒng),分析了橋位處的平均風(fēng)特性,并對(duì)實(shí)測(cè)脈動(dòng)風(fēng)的非平穩(wěn)與非高斯特性進(jìn)行了探討.研究結(jié)果表明:與傳統(tǒng)方法相比,新開(kāi)發(fā)的無(wú)線傳輸系統(tǒng)具有實(shí)時(shí)傳輸、成本低及無(wú)需現(xiàn)場(chǎng)監(jiān)測(cè)等優(yōu)勢(shì);橋位處的大風(fēng)期主要集中在2~4月份,且大部分發(fā)生在西南方向;在選取的強(qiáng)風(fēng)天氣中,出現(xiàn)山區(qū)雷暴風(fēng)的比例約為15%;實(shí)測(cè)強(qiáng)風(fēng)的平均風(fēng)攻角主要在-10°~0°范圍內(nèi)波動(dòng);擬合出的風(fēng)剖面指數(shù)波動(dòng)范圍為0~0.14,且其擬合概率密度分布的均值0.056明顯小于規(guī)范規(guī)定的最小值0.12,說(shuō)明規(guī)范規(guī)定的風(fēng)剖面指數(shù)不足以描述山區(qū)風(fēng);山區(qū)風(fēng)出現(xiàn)了同時(shí)具有非平穩(wěn)與非高斯特性的風(fēng)速樣本,且其瞬時(shí)最大風(fēng)速可達(dá)22.0 m/s.
[Abstract]:In order to obtain the wind field characteristics in remote mountain areas, a wireless transmission data acquisition system for high frequency anemometer is developed, and the average wind characteristics of the bridge are analyzed. The non-stationary and non-Gao Si characteristics of the measured pulsating wind are also discussed. The results show that: compared with the traditional methods, the newly developed wireless transmission system has the advantages of real-time transmission, low cost and no need for on-site monitoring, the gale period at the bridge is mainly concentrated in February / April, and most of it occurs in the southwest direction. In the selected strong wind weather, the proportion of thunderstorm in mountain area is about 15, the average wind attack angle of measured strong wind mainly fluctuates in the range of -10 擄~ 0 擄; The fluctuation range of wind profile index is 0 ~ 0.14, and the mean value of fitting probability density distribution is obviously less than the minimum value of 0.12, which indicates that the wind profile index specified in the code is not enough to describe mountain wind. A sample of wind speed with both non-stationary and non- characteristics appears in the mountain wind, and its instantaneous maximum wind speed can reach 22.0 m / s.
【作者單位】： 西南交通大學(xué)土木工程學(xué)院風(fēng)工程試驗(yàn)研究中心;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51578471);國(guó)家自然科學(xué)基金青年科學(xué)基金資助項(xiàng)目(51408504) 交通運(yùn)輸部西部課題資助項(xiàng)目(201231835250)
【分類號(hào)】：U442

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4 張s，

本文編號(hào)：1841179