| Modern trams can well meet the needs of urban environmental protection and sustainable social development,and have been widely recognized worldwide.At present,there are relatively few studies on the fixed form of rail,rail type and the stress of rail structure in embedded track structure in China,and there is no systematic theory.Therefore,it is urgent to carry out dynamic and static analysis of embedded track structure according to the characteristics of modern trams.The main work of this paper is as follows:(1)The static calculation model of embedded track under mixed traffic section is established by Abaqus,which can accurately simulate the static characteristics of track system under vehicle and tram loads.The coupling dynamic model of modern tram train-embedded track is established by UM.The dynamic performance evaluation criteria of modern trams are put forward.(2)Research on the filling material of the embedded track.By analyzing the force and deformation of filling material itself,asphalt surface and rail under different elastic modulus of filling material,it is preliminarily determined that the elastic modulus of filling material is more suitable at 14-16 MPa.(3)Through comparative analysis of dynamic characteristics of fixed rail with filling material and fastener system,it is concluded that fixed rail with filling material is more suitable for embedded track structure.Through comparative analysis of dynamic characteristics of 59R2 groove rail and 60kg/m rail,it is suggested that 59R2 groove rail be more suitable for embedded track.(4)Comparing and analyzing the dynamic characteristics of different gauge width and tram speed,it is suggested that when tram passes through the curve section with a radius of 30 m,the speed is chosen to be 20 km/h and the gauge length is widened by 15 mm. |
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