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1、密級(jí):公開(kāi)高速鐵路車橋耦合振動(dòng)分析Ana
2、ysisofHigh-speedRMlwayVehicle—bridgeCouplingVibration(申請(qǐng)石家莊鐵道學(xué)院授予工學(xué)碩士學(xué)位論文)培養(yǎng)單位:專業(yè):研究生:指導(dǎo)教師:土木工程分院橋梁與隧道工程姚永紅蘇木標(biāo)教授二00六年十二月摘要列車通過(guò)橋梁時(shí)將引起橋梁結(jié)構(gòu)的振動(dòng),而橋梁的振動(dòng)又反過(guò)來(lái)影響車輛的振動(dòng),這種相互作用、相互影響的問(wèn)題就是車輛與橋梁之間振動(dòng)耦合的問(wèn)題。本文采用ANSYS和FORTRAN語(yǔ)言編制了車橋耦合振動(dòng)分析程序,通過(guò)對(duì)鄭州黃河大橋車橋耦合振動(dòng)分析,與實(shí)測(cè)數(shù)據(jù)相比較,驗(yàn)證了程序的正確性。應(yīng)用
3、該程序考慮不同因素,對(duì)2x64m連續(xù)鋼桁梁橋進(jìn)行了車橋耦合振動(dòng)分析,并分析了列車上橋前的初始條件對(duì)橋梁振動(dòng)的影響。計(jì)算結(jié)果表明:隨著行車速度的增加,橋梁跨中橫向和豎向振動(dòng)位移最大值均增大;在橋上布滿車輛的情況下,所取車輛數(shù)目的多少對(duì)橋梁跨中橫向和豎向振動(dòng)位移最大值無(wú)較大的影響;軌道不平順對(duì)橋梁跨中橫向和豎向振動(dòng)位移最大值的影響較大:隨著車輛一系縱向剛度的增加,橋梁跨中橫向振動(dòng)位移最大值增長(zhǎng)較快,一系和二系彈簧橫向剛度值對(duì)橋梁跨中橫向振動(dòng)位移最大值有一定的影響,但其影響的幅度有限。通過(guò)在路基上運(yùn)行不同的區(qū)間長(zhǎng)度,以不同的行車速度,不同的車輛類型,分析了列車上橋
4、前的初始條件對(duì)橋梁振動(dòng)的影響,當(dāng)行車速度相同時(shí),考慮列車上橋前在路基上運(yùn)行不同的區(qū)間長(zhǎng)度,橋梁跨中豎向振動(dòng)位移最大值幾乎不受影響,橋梁跨中橫向振動(dòng)位移最大值與所選取的運(yùn)行區(qū)間長(zhǎng)度和車輛類型有關(guān)。關(guān)鍵詞:車橋耦合振動(dòng),高速鐵路,連續(xù)鋼桁梁橋AbstractThestructureofbridgewillvibratewhenthetrainpassesthrou曲thebridge,atthesametimethevibrationofvehideiscausedconversely.Infact,thiskindofinteractionisvibratio
5、ncouplingbetweenvehicleandbridge.ThistextadoptsANSYSandFORTRANcomputerlanguagetoworkouttheprocedureofVehicle—BridgeCouplingVibration.ItanalyzesZhengzhouYellowRiverbridge,andthencomparestheresultwiththemeasureddatasoastovalidatetheaccuracyoftheprocedure.Next,consideringaboutthediffe
6、rentfactors,theauthoranalyzesVehicle-BridgeCouplingVibrationon2x64mthesteelcontinuoustrussedgirderbridge,andconstruestheinitialconditionsbeforethetraingotonthebridgebythisprocedure.Theresultindicatesthatthelateralandverticalmaxdynamicdisplacementofmid—spanbridgewillincreasewhenthed
7、rivingspeedincreases.Thenumberofvehicleshasnothingtodowiththelateralandverticalmaxdynamicdisplacementofmid·spanbridgewhenthebridgeisstrewedwithvehicles.Railirregularitieshavemuchinfluenceonthelateralandverticalmaxdynamicdisplacementofmid-spanbridge.Withtheaugmentofthefirstlongitudi
8、nalstiffness,thelateralmaxdynamicdisplacementofmid-spanbridgeincreasesfaster.Thefirstandsecondcrossstiffnesshavesomethingtodowiththeincreaseoflateralmaxdynamicdisplacementofmid-spanbridge,buttherangeofinfluenceislimited.Adoptingdifferentwheelinglengthinformation,differentvelocityan
9、ddifferenttypesofvehicle,t