本文選題：輕軌列車　切入點：橋墩沉降　出處：《上海交通大學學報》2017年03期 　論文類型：期刊論文

【摘要】：以輕軌列車-軌道-橋梁(LTTB)系統(tǒng)建模理論為基礎,針對某雙線對開輕軌列車通過多跨簡支梁橋動力性能分析的工程問題,建立考慮線形變化的有限元模型,并充分考慮各子系統(tǒng)非線性特性、輪軌接觸和軌道不平順等因素;采用輪重減載率、車體振動最大加速度和Sperling指數(shù)評價輕軌列車的運行性能,研究了輕軌列車的過橋運行性能以及梁體線形變化對列車運行性能的影響.結(jié)果表明:所建有限元模型具有可視化建模、高效穩(wěn)定求解等特點;隨著車速增加,輕軌列車的運行安全性降低、運行平穩(wěn)性變差;在同一車速條件下,梁體線形變化對輕軌列車運行安全性、平穩(wěn)性的影響程度不同;針對案例,當梁橋線形變化時,輕軌列車運行性能由輪重減載率控制,在不大于設計速度80km/h運行(如橋墩沉降不大于30mm或梁體下?lián)?上拱不大于20mm)的條件下,輕軌列車滿足運行安全性的要求.
[Abstract]:Based on the modeling theory of light rail train-rail-bridge (LTTB) system, a finite element model considering the change of linear shape is established to solve the engineering problem of dynamic performance analysis of a double-track light rail train passing through a multi-span simply supported beam bridge. The nonlinear characteristics of each subsystem, wheel-rail contact and track irregularity are fully considered, and the performance of the light rail train is evaluated by using the wheel load reduction rate, the maximum acceleration of the body vibration and the Sperling index. The influence of the bridge running performance of the light rail train and the change of beam alignment on the train operation performance is studied. The results show that the finite element model has the characteristics of visual modeling, efficient and stable solution, etc. Under the same speed condition, the change of beam alignment has different influence on the safety and smoothness of light rail train. In the case of the case, when the beam bridge shape changes, The operation performance of the light rail train is controlled by the wheel load reduction rate. Under the condition that the design speed is not greater than 80 km / h (for example, the settlement of the bridge pier is less than 30 mm or the deflection / upper arch of the beam body is not more than 20 mm), the light rail train meets the requirements of operation safety.
【作者單位】： 東南大學混凝土及預應力混凝土結(jié)構(gòu)教育部重點實驗室;普渡大學土木工程學院;山東農(nóng)業(yè)大學水利土木工程學院;
【基金】：江蘇省杰出青年基金項目(BK20140025) 江蘇省自然科學基金項目(BK20151092) 江蘇省普通高校研究生科研創(chuàng)新計劃項目(CXLX13_102)資助
【分類號】：U441.7;U270.1

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