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本文利用Ｌａｇｒａｎｇｉａｎ方法建立了剪切紊流中颗粒运动的脉动频谱随机轨迹模型，其中流体脉动速度采用Ｆｏｕｒｉｅｒ级数和湍流脉动能谱来确定．数值计算结果与实验结果的对比分析表明，该模型能够很好地描述颗粒在剪切流中的运动．
In this paper, a pulsatile spectrum random trajectory model of particle motion in shear turbulence is established by using Lagrangian method, in which the fluid pulsation velocity is determined by Fourier series and turbulent pulsation energy spectrum. The numerical analysis and experimental results show that the model can well describe the particle motion in shear flow.