Abstract：Research purposes: Currently, slab track will be built on embankment in some HSI, in domestic,the track of HSL requires higher regularity and higher steady. This paper bases on vehicle-track large system, researches the dynamics characteristic of embankment-rigidity bed transit section and provides theories support and consult basis for design and construction.
Research methods:Based the vehicle-track coupling dynamics, the embankment-rigidity bed transit model is provided, then computer program is worked, and dynamics characteristic of embankment-rigidity bed transit section is simulated.
Research conclusions:At transit section,dynamic interaction is very slight due to track stiffness difference，but the variety of rail deflection is obvious. Asymmetrical settlement of foundation has remarkable influence on track stmcture and the steady of vehicle，the acceleration of vehicle will attain 1 .0 m/ s2 if there exits 30 mm/10 m Asymmetrical settlement, and the influence becomes greater with inereaning of speed; the length of transit section should make the acceleration of vehicle as chief index, the length of transit section can establish as 25-30 m if there exits 30 mm asymmetrical settlement.
2007, Vol. 24 
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