現(xiàn)代監(jiān)控量測新技

術(shù)風洞試驗測試技術(shù)橋梁工程研究所 風洞實驗室20**年1*月1*日windInstituteofBridge

Engr.,WindTunnel

Lab.1.

風災InstituteofBridge

Engr.,WindTunnel

Lab.1.

風災InstituteofBridge

Engr.,WindTunnel

Lab.1.

風災InstituteofBridge

Engr.,WindTunnel

Lab.1.

風災InstituteofBridge

Engr.,WindTunnel

Lab.1.

風災InstituteofBridge

Engr.,WindTunnel

Lab.YearNameCountryMain

spanDesignerlength

(ft)1818Dryburgh

AbbeyScotland260John&William

Smith1821UnionEngland449SirSamuel

Brown1834NassauGenmany245Lossen&

Wolf1836BrightonChair

PierEngland255SirSamuel

Brown1838MontroseScotland432SirSamuel

Brown1839Menai

StraitWalse580Thomas

telford1852Roche-BeruardFrance641Le

Blanc1854WheelingUSA1010Charles

Ellet1864Lewiston-QueenstonUSA1041Edward

Serrell1889Nigara-CliftonUSA1260Samuel

Keefer1940Tacoma

narrowsUSA2800Leon

Moisseiff1.

風災TacomaNarrow

BridgeMovieNovember7,1940,TacomaNarrowsBridgeDesigner：LeonMoisseiff,Velocity:18～22m/s.Prof.F.B.Farquharson,Universityof

Washington.Instituteof

BridgeEngr., WindTunnel

Lab.1.

風災Instituteof

BridgeEngr., WindTunnel

Lab.開口式風洞循環(huán)式風洞2.

風洞風洞（wind

tunnel）即風洞實驗室，是以人工的方式產(chǎn)生并且控制氣流，用來模擬飛行器或?qū)嶓w周圍氣體的流動情況，并可量度氣流對實體的作用效果以及觀察物理現(xiàn)象的一種管道狀實驗設(shè)備，它是進行空氣動力實驗最常用、最有效的工具之一。InstituteofBridge

Engr.,WindTunnel

Lab.2.

風洞InstituteofBridge

Engr.,WindTunnel

Lab.測速試驗測力試驗測振試驗測壓試驗2.

風洞風洞試驗InstituteofBridge

Engr.,WindTunnel

Lab.3.

測速試驗皮托管微壓計InstituteofBridge

Engr.,WindTunnel

Lab.3.

測速試驗熱線風速儀示意圖熱線風速儀測量系統(tǒng)InstituteofBridge

Engr.,WindTunnel

Lab.3.

測速試驗眼鏡蛇探頭風速儀三維脈動風速儀流場測試InstituteofBridge

Engr.,WindTunnel

Lab.3.

測速試驗51015253035407015141312111098U

(m/s)20t

(s)wave2:H=24m;distance=60m;statistics:12.03;0.37;-0.32;

13.730510

15354012.510.07.55.02.50.0-2.5U

(m/s)20

25

30t

(s)wave3:H=12m;distance=50m;statistics:7.30;2.85;-0.90;

3.14典型脈動風速時程InstituteofBridge

Engr.,WindTunnel

Lab.4.

測振試驗激光位移計激光位移計基本測試原理示意圖InstituteofBridge

Engr.,WindTunnel

Lab.4.

測振試驗不同型號激光位移計相關(guān)參數(shù)與臨近安裝時的距離要求InstituteofBridge

Engr.,WindTunnel

Lab.4.

測振試驗InstituteofBridge

Engr.,WindTunnel

Lab.4.

測振試驗模型振動位移時程InstituteofBridge

Engr.,WindTunnel

Lab.5.

測力試驗典型測力天平InstituteofBridge

Engr.,WindTunnel

Lab.5.

測力試驗底座風洞頂面風洞底面轉(zhuǎn)盤高頻天平支撐可調(diào)支撐螺桿模型端板可調(diào)支撐螺桿天平模型轉(zhuǎn)接導流板來流風洞測力試驗示意圖InstituteofBridge

Engr.,WindTunnel

Lab.InstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗電子壓力掃描閥InstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗風洞測壓試驗流程示意圖InstituteofBridge

Engr.,WindTunnel

Lab.InstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗標準化的脈動風壓時程實測風壓與真實風壓對比對于測壓試驗，需要注意管道信號畸變問題：（1）產(chǎn)生駐波；（2）產(chǎn)生管腔共振。InstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗不同條件下壓力幅值比壓扁管示意圖壓扁管法InstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗理論修正方法Long

tubeExtrashort

tubeSine

signal Amplifier SpeakerPressurescannerPressure

measurementsystem壓強標定系統(tǒng)示意圖與壓強標定設(shè)備InstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗（1）管道內(nèi)徑：0.9mm；（2）管道長度(cm)：30,40,50,60,70,80,90,100,120,150,180,200；（3）輸入正弦信號，頻率分別為：5,10,15...100,110,120,130,140,160,180,200,220,240,260,280,320,340

Hz。InstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗不同條件下壓力幅值比InstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗不同條件下信號相位差I(lǐng)nstituteofBridge

Engr.,WindTunnel

Lab.

6.

測壓試驗 單位某長方體表面測壓風洞試驗測點布置平面圖-10020103020cm40cm80cm120cm200cm(measure-real)/real

(%)-20-300.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40RMS

pressure

coefficient

of

real

signal不同管長條件下風壓系數(shù)脈動值相對誤差I(lǐng)nstituteofBridge

Engr.,WindTunnel

Lab.6.

測壓試驗02-40-30-20-102010020cm40cm120cm80cm20