筒仓仓壁摩擦对仓壁侧压力影响的研究

摘要

The paper simulated and analyzed the changes of lateral pressure on the wall of silos with different wall friction coefficient under storage and dischage conditions by using discrete element method.Results showed that the peak pressure distrubution on the wall caused by discharge was the control pressure for silo structure design.With the increase of the wall friction coefficient,the overpressure coefficient increased,but the static pressure and the peak discharge pressure on the side wall of silos decreased.The influences of the friction factor on the laterial pressure on the wall were deepened wiht the depth.%采用离散单元法模拟分析仓壁摩擦因数不同的筒仓在贮料和卸料工况下的仓壁侧压力变化.研究结果表明,卸料引发的仓壁峰值压力分布为筒仓结构设计的控制压力.随着仓壁摩擦因数的增大,超压因数呈增大的趋势,而筒仓侧壁的静止压力和卸料压力峰值均有减小的趋势,且摩擦因数对仓壁侧压力的影响程度随着深度的增加而增大.