ABSTRACT
For the better ride comfort of high speed railway vehicles, the road has been instead of the bridge in the high speed railway construction. But the piers sink uneven to make the track irregularity value beyond the norm. This paper simulates a vehicle moving on a pier settlement bridge to research the relationship between vehicle responses and pier settlement with multifractal spectrum method. The vehicle responses distinction after analyzing by the method between pier settlement and no is very clear. It is because that the longer wavelength can give the carbody acceleration more smooth signal components.
