【摘要】：研究目的:鐵路橋梁設(shè)在反向曲線上時(shí),相關(guān)規(guī)范要求需進(jìn)行充分論證。本文以某車站擴(kuò)能改造工程中由于受到地形條件限制而設(shè)計(jì)的反向曲線鐵路橋梁為例,采用MSC.PATRAN和ADAMS/RAIL分析軟件,分別建立完整的橋梁和列車三維空間模型,分析CRH1動(dòng)車組在不同車速條件下通過(guò)該橋的車橋耦合振動(dòng)情況。研究結(jié)論:(1)通過(guò)對(duì)橋梁各跨的縱、橫向位移,加速度以及脫軌系數(shù)、輪重減載率、車體加速度、Sperling舒適性指標(biāo)等動(dòng)力性指標(biāo)計(jì)算結(jié)果的分析可以得到:CRH1動(dòng)車組以70~90 km/h速度通過(guò)該反向曲線鐵路橋梁時(shí),車輛的脫軌系數(shù)和輪重減載率隨著車輛的行駛速度增加而增加,橋梁各跨的豎向和橫向振動(dòng)位移較小,橋梁豎向和橫向振動(dòng)加速度小于規(guī)范規(guī)定的限值;(2)該橋梁具有較大的縱、橫向剛度,滿足列車運(yùn)行的安全性及舒適性要求;(3)由于受到地形條件限制而設(shè)計(jì)的反向曲線橋梁方案是可行的;(4)本研究成果能夠?yàn)槲挥诜聪蚯�的鐵路橋梁車橋耦合振動(dòng)研究提供參考。
[Abstract]:Research purpose: when the railway bridge is located on the reverse curve, the requirements of the relevant specifications need to be fully demonstrated. In this paper, taking the reverse curve railway bridge designed due to the limitation of terrain condition in a station capacity expansion project as an example, using MSC.PATRAN and ADAMS/RAIL analysis software, the complete three-dimensional space model of bridge and train is established, respectively. The coupling vibration of CRH1 EMU through the bridge under different speed conditions is analyzed. The conclusions are as follows: (1) through the longitudinal and lateral displacement, acceleration and derailment coefficient of each span of the bridge, the wheel load reduction rate, The analysis of the calculation results of the dynamic performance indexes such as acceleration and Sperling comfort index of the car body can be obtained when the mass CRH1 EMU passes through the reverse curve railway bridge at the speed of 70 ~ 90 km/h. The vehicle derailment coefficient and wheel load reduction rate increase with the increase of vehicle speed, the vertical and lateral vibration displacements of each span of the bridge are smaller, and the acceleration of the vertical and transverse vibration of the bridge is less than the limit value stipulated in the code. Transverse stiffness, To meet the safety and comfort requirements of train operation; (3) the design of reverse curve bridge scheme is feasible due to the constraints of terrain conditions; (4) the results of this study can provide a reference for the study of vehicle-bridge coupling vibration of railway bridge located in reverse curve.
【作者單位】： 中鐵二院工程集團(tuán)有限責(zé)任公司;
【分類號(hào)】：U441.3;U448.13

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