The Vibration Response Evaluation Of Heavy-duty Train On The Route Of Buildings And Research Of Vibration Reduction

Heavy-duty Train has become the main direction of development of the world's shipping, China's heavy rail lines are growing. The effects of vibration generated by the rail traffic along the building produce more and more serious thriving city subway. Overloaded train vibration produce more intense compared to other forms of rail transport and should be taken seriously. In China, for overloaded train vibration studies currently still at a preliminary stage, the associated vibration detection and vibration impact study of the buildings along the route, little work done in this paper is as follows:(1) Comparative analysis of national train vibration on the environmental impact of the relevant specifications, from two aspects: First, it's the impact of vibration on the train building structure; on the other hand compare human comfort evaluation criteria of the building.(2) According to ShuoHuang heavy rail line where the measured shock wave period as the basis of its analysis in the time domain and frequency domain respectively. Provide a reference for the assessment of vibration and provide the evidence of the vibration isolation surrounding buildings.(3) Build six-story frame model and two layers of masonry model with the use of general-purpose finite element analysis software SAP2000 to analyze the measured vibration response overloaded trains wave; change thickness, span and other parameters to analyze the impact of changes in the vibration of the characteristics of the structure itself; according to the basis of the analysis and the relevant standards, evaluate human comfort of the building structure.(4) With a vertical isolation bearing disc springs, select the appropriate stiffness and damping parameters, compared to the model without isolation and isolation of vibration response of the model and the isolation effect.Through theoretical analysis and calculation of the vibration model obtained the following main conclusions:(1) Vibration wave generated by Heavy-duty train is much more intense than the high-speed train and subway. Horizontal vibration to be greater than the vertical vibration, and each of the predominant frequency of vibration is between 40-50Hz; the high-frequency attenuation is faster, low-frequency attenuation is slower.(2) The performance of the vibration wave propagation to the building are main of vertical vibration,However, horizontal vibration can not be ignored. More intense in the lower structure of vertical vibration performance with increased vibration floor, the maximum vertical vibration is on the top floor; while there is an inflection point horizontal vibration, the maximum vibration may be at the middle of the floor.(3) Vertical isolation bearing disc springs for vertical vibration isolation effect is very obvious, select the appropriate combination of disc spring vertical stiffness can be adjusted as required, the isolation transfer rate can reach 0.1 or so, the effect of vertical isolation is very obvious and for lower masonry structures on the level of the vibration can be reduced to an acceleration vibration level in line with national standards.