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A 2 dimensional dynamical model of asphalt-roller interaction during vibratory compaction

机译：振动压实过程中沥青与压路机相互作用的二维动力学模型

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The quality and longevity of an asphalt pavement is influenced by several factors including, the design of the mix and environmental factors at the time of compaction. These factors are difficult to control during the construction process and often result in inadequate compaction of the pavement. Intelligent Compaction (IC) technologies address this issue by providing continuous real-time estimation of the compaction level achieved during construction. This information can then be used to address quality issues during construction and improve the overall quality of the pavement. One of the goals of IC is the dynamic adjustment of the compaction effort of the vibratory roller in order to achieve uniform density and stiffness of the pavement. However, complex dynamics of the compaction process and lack of computationally tractable dynamical models hamper the development of such controllers of vibratory rollers. In this study, the interaction between the vibratory roller and the underlying pavement is studied. A two-dimensional lumped element model that can replicate the compaction in the field is developed and its parameters are determined using the visco-elastic plastic properties and the shear deformation properties of the asphalt mix. Numerical simulation results show that the model is capable of capturing the coupled vibration dynamics of the asphalt-roller system in both the vertical and longitudinal direction. Comparison of numerical studies with the field compaction data also indicates that the model can be helpful in the development of control algorithms to improve the quality of pavements during their construction.
机译：沥青路面的质量和寿命受多种因素影响，包括混合料的设计和压实时的环境因素。这些因素在施工过程中难以控制，并经常导致人行道的压实不足。智能压实（IC）技术通过提供对施工过程中达到的压实程度的连续实时估计来解决此问题。然后，该信息可用于解决施工期间的质量问题并改善人行道的整体质量。 IC的目标之一是动态调整振动压路机的压实力，以实现路面的均匀密度和刚度。然而，压实过程的复杂动力学和缺乏可计算的动力学模型阻碍了这种振动辊控制器的发展。在这项研究中，研究了振动压路机与下层路面之间的相互作用。建立了可以在现场复制压实的二维集总单元模型，并使用沥青混合料的粘弹塑性和剪切变形特性确定了其参数。数值模拟结果表明，该模型能够捕获沥青压路机系统在垂直和纵向两个方向上的耦合振动动力学。数值研究与现场压实数据的比较还表明，该模型可有助于控制算法的开发，以改善人行道施工过程中的质量。

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