中文摘要：

随着环境友好型铁路建设的发展要求,声屏障作为有效的降噪手段得到广泛的应用,脉动力是声屏障动力设计中必须控制的因素。基于ALE方法构建高速列车、声屏障、空气三维数值模型,对列车经过声屏障时产生的脉动力过程进行仿真。分析声屏障脉动力分布特性及脉动力时程变化特性,分析列车运行速度、声屏障高度、与股道中心线距离等因素对脉动力的影响规律,数值模型求解采用并行计算技术,分析并行区域分解方案对并行效率及加速比的影响。本文研究结果为高速铁路声屏障结构设计提供参考依据。

英文摘要：

Due to the developing requirements of building environment-friend type railway,noise barriers have been put into wide application as an effective means of reducting noises.The impulsive pressure is the control factor essential to dynamic design of the noise barrier.The three dimensional model of the high-speed train,noise barrier,and air was built with the ALE method to simulate the whole process of generating train-induced impulse pressures.The distribution and time-histories change characteristics of the impulsive pressures were studied.The law of the train speed,the height of the noise barrier and the distance between the noise barrier and the track center affecting the impulsive pressure were analyzed.The three dimensional model was solved with the parallel computation technique.The influence of the parallee domain decomposition method on the parallel efficiency and speedupratio was studied.The research results provide reference for structure design of noise barriers of high-speed railways.