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为了研究振动轮下土壤的动态响应及振动参数对土壤竖向应力的影响,利用Ansys/Ls-Dyna3D软件建立了振动轮-土壤模型,并进行了数值模拟分析和试验验证。结果表明,振动轮下土壤的竖向应力值高、能量密度大的范围近似为一个椭球体;土壤的竖向应力沿轮宽方向对称分布,随土壤深度的增加迅速衰减,近似负幂函数衰减;随着振幅的增加,不同深度处的土壤竖向应力均随之增加;随着碾压速度的增加,土壤的竖向应力随之减小,在某一共振频率范围内,土壤能获得较好的压实效应。
In order to study the dynamic response of soil under vibration and the influence of vibration parameters on soil vertical stress, a vibration wheel-soil model was established by Ansys / Ls-Dyna3D software, and numerical simulation and experimental verification were carried out. The results show that the vertical stress value of soil under vibration wheel is high and the range of high energy density is approximate to an ellipsoid. The vertical stress of soil distributes symmetrically along the wheel width direction and decays rapidly with the increase of soil depth. The approximate negative power function decay . With the increase of amplitude, the vertical stress of soil at different depths increases. With the increase of rolling velocity, the vertical stress of soil decreases. In a certain range of resonance frequency, Good compaction effect.