【摘要】 在自制的剪应力测试仪器上 ,对消失模铸造干砂紧实特性进行了试验研究。着重研究了振幅、频率、振动时间、砂箱大小、形状以及干砂粒形和粒度等 7个因素对干砂紧实特性的影响 ,并运用正交设计 ,找到诸因素对紧实特性影响作用大小顺序。更多还原

【Abstract】 In this paper,a experimental study was made on compaction properties of dry sand in the EPC with the selfmade testing deviceIn detail,the effects of sand box shape,dry sand granularity,amplitude,vibrating time and vibrating frequency on compaction properties of dry sand were investigatedThe relative order of effects was found by experimental design更多还原