The Influence of Source-receiver Interaction on the Numerical Prediction of Traffic Induced Vibrations
Several numerical models for the prediction of traffic induced vibrations have been devel -oped during the last decades. In all of these models, assumptions about the physical behaviour are made. It is important to investigate to which extent those assumptions influence the accuracy of vi -bration predictions. This paper focuses on a specific aspect , i. e. the influence of disregarding the coupling between the source (railway track, road) and the receiver (building). As the distance between source and receiver is of the same order of magnitude as the wavelength in the soil in the fre -quency range of interest, it is likely that the source -receiver interaction will significantly alter the wave propagation. A numerical case study is presented wherein the importance of this coupling effect is investigated for a variety of parameters (separation distance of the structures ,soil type, foundation design ,...). Results suggest that the influence of the source receiver interaction is subject to consid -erable spatial variation ,with local deviations up to ± 10 dB in a frequency range from 0 to 80 Hz. A power flow approach is introduced as a unique and more valuable way to quantify and assess the source^eceiver interaction ,as it removes the spatial variation. It allows to estimate the overall influence of the source-receiver interaction , which remains limited to ±2 dB.
Geert DEGRANDE Geert LOMBAERT Pieter COULIER
Department of Civil Engineering , K.U.Leuven, Belgium
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
23-29
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）