中文摘要：

通过实验研究了二维静态颗粒体系中转向系数与体积分数的关系。实验结果表明，当对颗粒施加持续稳定的荷载时，颗粒体积分数增加，转向系数K呈现出先减小后趋向饱和的特性，同时随着颗粒堆积角度的增大，转向系数K呈现出先增大后趋向饱和的特性。最后从理论上讨论了转向系数与堆积角度的关系，给出了符合实验结果的参数关系式。

英文摘要：

Experimental investigation on the relationship between steering coefficient and volume fraction in two-dimen- sional static granular system was carried. The results show that granular volume fraction increases, steering coefficient decreases gradually and reaches a saturated state while putting a steady stress on the grains continually; at the same time, steering coefficient increases and reaches a saturated state with the increasing of granular stacking angel. Accord- ing to the experimental results, a parameter equation matching with the experimental data was provided.