本文關(guān)鍵詞：廈深鐵路榕江特大橋主橋車-橋耦合振動分析　出處：《橋梁建設(shè)》2017年02期 　論文類型：期刊論文

  更多相關(guān)文章： 高速鐵路橋梁 剛性桁梁柔性拱 組合體系 車-橋耦合 動力響應(yīng) 有限元法

【摘要】：廈深鐵路榕江特大橋主橋為(110+2×220+110)m下承式大跨度剛性桁梁柔性拱組合體系橋。為了解其在設(shè)計時速下車-橋系統(tǒng)的動力性能,基于ANSYS軟件建立全橋有限元模型,分析其自振特性,采用SIMPACK和ANSYS聯(lián)合數(shù)值仿真分析方法,計算CRH2動車組列車運行時橋梁和列車組的動力響應(yīng),并與現(xiàn)場實測值和規(guī)范限值進(jìn)行對比,評價該橋在列車設(shè)計時速下車-橋系統(tǒng)的安全性和舒適性。結(jié)果表明:雙線行車可有效減小橋梁跨中的橫向振動,但對列車響應(yīng)的影響很小;車速250km/h時橋梁各動力響應(yīng)值均大于車速220km/h時的值,且均滿足規(guī)范限值;在各工況下,列車組的車輛脫軌系數(shù)、輪重減載率、輪軸橫向力和車體加速度均小于標(biāo)準(zhǔn)限值,舒適性指標(biāo)均為優(yōu)或良,列車運行安全性和舒適性滿足規(guī)范要求。
[Abstract]:The main bridge of Xiamen Shenzhen railway bridge for Rongjiang (110+2 * 220+110) type of Large Span Rigid truss girder and flexible arch combination system bridge under m. In order to understand the car - in the design speed of bridge system dynamic performance, the ANSYS software to establish the finite element model of the whole bridge based on the analysis of its vibration characteristics, analysis method of using SIMPACK and ANSYS combined with numerical simulation calculation and dynamic response of the bridge of the train CRH2 EMU trains running, and the specification limits and compared with the measured value, the evaluation of the bridge to get off on the train - bridge system design speed of safety and comfort. The results show that the two lane can effectively reduce the transverse vibration of bridge. But the influence of train response is very small; when the speed of 250km/h bridge dynamic response speed values are greater than the 220km/h value, and all meet the specification limits; in the condition of the train derailment coefficient, wheel load reduction rate, cross axle Both the acceleration and the acceleration of the car body are less than the standard limit, and the comfort indexes are both excellent or good, and the safety and comfort of the train meet the requirements of the standard.

【作者單位】： 中南大學(xué)土木工程學(xué)院;中國中鐵二院昆明勘察設(shè)計研究院有限責(zé)任公司;
【基金】：鐵道部科技研究開發(fā)計劃項目(2010G004-A)~~
【分類號】：U441.3
【正文快照】： 1工程概況榕江特大橋為廈深鐵路控制性工程,位于廣東省揭陽市榕城區(qū)榕江河段,為雙線有砟高速鐵路橋梁。大橋全長7.373km,最大縱坡0.6%,線間距4.6m,設(shè)計時速250km/h,設(shè)計活載為雙線ZK活載。主橋平面位于直線上,立面位于平坡上,不受豎曲線的影響[1]。榕江特大橋主橋采用(110+2×，

本文編號：1394411