Based on Biot′s theory and the concept of homogeneous porous fluid,the function of vertical vibration amplification is described as a function of degree of saturation,soil properties,layer thickness and loading frequency.

Model of vertical vibration of train and floating slab track system in urban rail transit system;

Influence of fastener failure on responses of vertical vibration of urban rail transit train-floating slab track system;

Dynamic characteristics analysis in suspended structure effected under vertical vibration;

Relationship among the resonance frequency,the radial displacement amplitude magnification and the geometrical dimensions is analyzed.

Based on the transfermatrix method, frequency equation and amplitude amplification factor of the stepped type ultrasonic horn with transitional section of cosine type are given.

Based on this,in order to take more detailed demonstration or evaluation for the rolling noise under the high speed condition,according to the relationship between effective roughness,which derived from indirect measurement of combined effective roughness through vertical vibration of rail,and sound pressure,the transfer function for effective roughness to sound pressure was deduced.