本文選題：中低速磁浮列車　切入點(diǎn)：地表振動　出處：《振動與沖擊》2017年18期

【摘要】：為研究中低速磁浮引起地表振動特性。在國內(nèi)首條運(yùn)營的長沙中低速磁浮快線某路段進(jìn)行現(xiàn)場地表振動測試,同時(shí)測試北京地鐵13號線某高架線區(qū)段地表振動作為對照工況。測試結(jié)果表明:由于軌道受均布力,磁浮快線引起的地表振動波形沒有明顯的周期性峰值;磁浮線路,由于輪軌分離,車輛、軌道系統(tǒng)的特征距離所對應(yīng)的特征頻率不明顯,橋梁動力特性較明顯;由于輪軌分離、受軌道不平順影響較小,30~80 Hz中低速磁浮存在明顯優(yōu)勢地面振動,這部分振動主要來自導(dǎo)軌、軌道梁的結(jié)構(gòu)振動以及線路不平順;距線路0~40 m范圍內(nèi)地表振動的最大Z振級,中低速磁浮快線較傳統(tǒng)地鐵高架線對應(yīng)距離至少小4 dB,且中低速磁浮快線引起地表振動在10~40 m范圍內(nèi)均滿足《城市區(qū)域環(huán)境振動標(biāo)準(zhǔn)》中的振動限值要求。
[Abstract]:In order to study the characteristics of ground vibration caused by medium and low speed maglev.In a section of Changsha middle and low speed maglev fast line which is the first in operation in our country, the field surface vibration test is carried out, and the ground surface vibration of an elevated line section of Beijing Metro Line 13 is tested as a control condition.The test results show that the surface vibration waveform caused by the maglev fast line has no obvious periodic peak due to the uniform distribution of track, and the characteristic frequency corresponding to the characteristic distance of vehicle and track system is not obvious due to the separation of wheel and rail on the maglev line.The dynamic characteristics of the bridge are obvious, due to the separation of wheel and rail, there is obvious dominant ground vibration due to the influence of track irregularity and low speed maglev at 3080Hz, which mainly comes from the guideway, the structural vibration of the track beam and the irregularity of the track.The maximum Z level of surface vibration within 40 m from the line,The corresponding distance of the medium and low speed maglev fast line is at least 4 dB smaller than that of the traditional subway viaduct line, and the ground vibration caused by the medium and low speed maglev fast line can meet the vibration limit requirements of the Environmental Vibration Standard for Urban areas within a range of 10 ~ 40 m.
【作者單位】： 北京交通大學(xué)土木建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金(51508022;51408033;51608456)
【分類號】：TB53
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本文編號：1729492