机车荷载作用下有碴桥上无缝线路道床纵向力传递规律试验测试及理论分析-铁道工程专业论文.docxVIP

摘 摘 要 阳{桥上无缝线路人“J进行了大量的研究【作，并且取得r— j 定成绩，但是对于在列车荷载作用下，有碴桥卜l无缝线路道床的 传力规律至今还没有一套完整的理论和试验可供参考。因此，我 、 们列题进行了研究。，。一 ! 研究丁作分为两部分进行，首先我f『J进行了试验研究，试验方面我 们主要进行厂F面两个方面的工作： (1)现场试验， 现场试验在京山线陡河大桥上进行，采用两种方法。一种是通过试 验获得了，轨道反作用力、固定支座挠曲力、活动支座摩阻力的试验数 据，通过汁算求得道床的纵向力。另一种方法是利用自行设计的传感器 直接测得道床的纵向力。 (2)窀内试验． 通过室内试验得到道床在只有纵向力作用下的纵向、垂向传力规 律．为现场试验、理论分析提供了必要补充。 其次，找们对有碴桥上无缝线路道床以及室内道床采用SAP原程 序进行了壹竖霾筮堑，得}_}{遵鏖坐!鱼力的笾垄塑堡，并与试验值进行比 较，通过比较可知利用SAP程序进行有限元法分析道床的传力规律是 可行的，同时也指出利用该方法的过程中存在的不足之处。 ／+ f通过这次研究t作，我们取得了一定的成绩，但还有许多问题没有 得到解决，这需要今后进1步研究来完成。■ AbstractPeople Abstract People have done much research work on railway track without gap on the bridge，and got some achivements．But up to present，There are no a series of integreted theory and experiments on ballasts’s transforming rules when the railway track without gap on the bridge js under the load of 10comotive So we decided to do some research work on it The research work is divided two parts Firstly、we do some testing research．In this way two sides work have been done． (1)site testing Site testing have been done in two ways on the Douhe large bridge beween Jingshan Line One way is through some experiments，data of tract counterforce、fixed bearing flexural force、movable bearing frictional foree has been got，and the longitudinal force along ballast can be caculated Through the other way，the longitudinal force along ballast is mesured directly with the sensors which are invented by ourselves． (2)testing laboratory experiments In these experiments，ballast’s longitudinal and vertical transforming rules have been known These provide necessary supplementary for site testing and theory analyses Secondly，limited element analyses have been done on the ballast on the bridge and the ballast at testing laboratory by SAP primitive programe ballast’s transforming rules of longitudinal foroe have been known and compared with testing data from these work，we think that using SAP programe to analyse ballast is possible At the same time，some defects of this way have been