Reduced-scale centrifuge experiments are widely used to simulate complex boundary-value geotechnical problems and to validate numerical or analytical models. The recordings obtained from these experiments can also help researchers back-calculate soil properties, which are subsequently used in model analysis. In this paper, we investigate how the container boundaries and scaling at different levels of centrifugal acceleration can influence the evaluation of soil properties in centrifuge for a sample of medium-dense, dry Ottawa sand. Soil dynamic properties at both small and large-strains are first identified through the theoretical solutions of wave propagation and the nonparametric method using accelerometer recordings at different distances from the container boundaries. Then, coupling effects are evaluated between the flexible-shear-beam container walls and the soil specimen, assuming the system behaves as a composite shear material. Results indicate that both small-strain and strain-compatible shear wave velocities obtained from accelerometer recordings were not highly sensitive to their location with respect to the container boundaries. However, without considering the geometry and shear stiffness of container, the shear wave velocity profile could be underestimated significantly, while the computed damping ratios were less influenced. Although volumetric settlements measured on the soil surface were strongly influenced by boundary effects, the identified threshold strains and the volumetric behavior of sand were consistent under the high-frequency environment of the centrifuge and low-frequency, drained laboratory element tests.

缩小规模的离心机实验被广泛用于模拟复杂的边值岩土工程问题并验证数值或分析模型。从这些实验中获得的记录还可以帮助研究人员对土壤特性进行反算，然后将其用于模型分析。在本文中，我们研究了中密度干燥渥太华沙样品在不同离心加速度水平下的容器边界和结垢如何影响离心机中土壤特性的评估。首先通过波传播的理论解和非参数方法，使用加速度计记录，在距容器边界不同距离处确定小应变和大应变下的土壤动力特性。然后，假设系统表现为复合剪切材料，则将评估挠性剪切梁容器壁与土壤样本之间的耦合效应。结果表明，从加速度计记录中获得的小应变和应变兼容剪切波速度对它们相对于容器边界的位置都不高度敏感。但是，如果不考虑容器的几何形状和剪切刚度，则可以显着低估剪切波速度曲线，而对计算的阻尼比的影响较小。尽管在土壤表面上测量的体积沉降受到边界效应的强烈影响，但是在离心机的高频和低频环境下，确定的阈值应变和砂的体积行为是一致的，